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Agenda 10/28/2014 PELICAN BAY SERVICES DIVISION Municipal Service Taxing and Benefit Unit NOTICE OF PUBLIC MEETING OCTOBER 28, 2014 THE CLAM BAY COMMITTEE OF THE PELICAN BAY SERVICES DIVISION WILL MEET TUESDAY, OCTOBER 28 AT 1:00 PM AT THE COMMUNITY CENTER AT PELICAN BAY, 8960 HAMMOCK OAK DR., NAPLES, FLORIDA. AGENDA The agenda includes, but is not limited: 1. Roll call 2. Agenda Approval 3. Audience Comments 4. Approval of March 18, April 8, April 24, May 14, and June 11 Minutes 5. Suggested edits for the Clam Bay NRPA Management Plan 6. Update on 10-year dredging permit application 7. Update on water quality data in STORET Water quality monitoring 8. New sampling sites starting in January 9. Alternative lab for copper 10. Clam Bay monitoring services a. Scope of services b. Conflict of interest provision 11. Clam Bay tidal range data from May 2013 to present 12. 12-month post dredging report 13. Other 14. Next meeting 15. Adjourn ANY PERSON WISHING TO SPEAK ON AN AGENDA ITEM WILL RECEIVE UP TO ONE (1) MINUTE PER ITEM TO ADDRESS THE BOARD. THE BOARD WILL SOLICIT PUBLIC COMMENTS ON SUBJECTS NOT ON THIS AGENDA AND ANY PERSON WISHING TO SPEAK WILL RECEIVE UP TO THREE (3) MINUTES. THE BOARD ENCOURAGES YOU TO SUBMIT YOUR COMMENTS IN WRITING IN ADVANCE OF THE MEETING. ANY PERSON WHO DECIDES TO APPEAL A DECISION OF THIS BOARD WILL NEED A RECORD OF THE PROCEEDING PERTAINING THERETO, AND THEREFORE MAY NEED TO ENSURE THAT A VERBATIM RECORD IS MADE, WHICH INCLUDES THE TESTIMONY AND EVIDENCE UPON WHICH THE APPEAL IS TO BE BASED. IF YOU ARE A PERSON WITH A DISABILITY WHO NEEDS AN ACCOMMODATION IN ORDER TO PARTICIPATE IN THIS MEETING YOU ARE ENTITLED TO THE PROVISION OF CERTAIN ASSISTANCE. PLEASE CONTACT THE PELICAN BAY SERVICES DIVISION AT (239) 597-1749. VISIT US AT HTTP://PELICANBAYSERVICESDIVISION.NET. 10/24/2014 2:26:37 PM CLAM BAY COMMITTEE OF THE PELICAN BAY SERVICES DIVISION MARCH 18,2014 The Clam Bay Committee of the Pelican Bay Services Division met Tue., March 18, at 1 p.m. at the Community Center at Pelican Bay, located at 8960 Hammock Oak Drive,Naples, Florida. Clam Bay Committee Susan O'Brien, Chairman John Domenie Joe Chicurel absent Mike Levy Tom Cravens Pelican Bay Services Division Staff Neil Dorrill,Administrator Mary McCaughtry, Operations Analyst Kyle Lukasz, Operations Manager Lisa Resnick,Recording Secretary Also Present Tim Hall,Turrell-Hall&Associates Clam Bay Stakeholders Marcia Cravens Linda Roth Peter Duggan Ted Raia Annice Gregerson Kathy Worley Mary Johnson AGENDA 1. Roll call 2. Agenda approval 3. Audience comments 4. Approval of February 4 meeting minutes 5. Discussion of Management Plan's goals and objectives 6. Discussion of revisions to Chapters 1-4, appendices and bibliography 7. Suggested timeline for management plan and permit application 8. Possible new reports/activities for FY 2015 9. Draft of article for PB Post 10. Establish meeting dates for April and May 11. Update on ordinance change for Clam Bay 12. Estimated costs and funding source for permit application and related work 13. Discussion of when to dredge and dredge template 14. Other 15. Adjourn ROLL CALL With the exception of Dr. Chicurel, all Committee members were present and quorum established. 1 Clam Bay Committee of the Pelican Bay Services Division March 18,2014 Minutes AGENDA APPROVAL Mr. Domenie motioned,Mr. Levy seconded to approve the agenda as amended[to discuss preparation and dissemination of agenda materials and table certain items until the next meeting due to untimely receipt]. The motion carried unanimously. DISCUSSION OF PREPARATION AND DISSEMINATION OF AGENDA MATERIALS The Committee agreed that the agenda material should be prepared and distributed in a more-timely manner. Ms. Marcia Cravens agreed; however,Ms. Mary Johnson indicated the bulk of the material was reviewed previously. APPROVAL OF FEBRUARY 4 MINUTES Mr. Domenie motioned,Mr. Levy seconded to approve the February 4 meeting minutes as presented. The motion carried unanimously. DISCUSSION OF MANAGEMENT PLAN'S GOAL AND OBJECTIVES The Committee had been provided with the original Management Plan's goals and objectives as well as flow charts created by Ms. Worley for comparison purposes. The goal and objectives were reviewed for consistency of language with attention to several items, such as t e protection of the NRPA and its relation to the use of the word estuary, the support and distinctions as it relates to passive recreation, and the timing of bird surveys. The discussion would be continued to the next meeting to give the Committee members-additional time to study the information provided. REVISIONS TO CHAPTERS 1 -4, APPENDICES, & BIBLIOGRAPHY The Committee reviewed the Chapters and focused on substantive':changes relating to consistency, appropriate language, and intent. Additional changes would be submitted to Mr. Hall. TIMING OF MEETING MATERIAL DISTRIBUTION Ms. O'Brien asked Mr. Dorrill if the material for the meetings could be provided to the Committee members on the Thursday before the following week's meeting by 5:00 p.m. to give them ample time to study the information. Mr. Dorrill agreed that the request was reasonable. 2 Clam Bay Committee of the Pelican Bay Services Division March 18,2014 Minutes SUGGESTED TIMELINE FOR MANAGEMENT PLAN AND PERMIT APPLICATION It was suggested that the latest draft for the Plan be available for stakeholders and put on the website by May 1, with a workshop to follow on May 13. Final comments should be submitted by stakeholders by May 16. POSSIBLE NEW REPORTS/ACTIVITES FOR FY 2015 The Committee discussed the use of volunteer organizations and grants to help reduce the costs of surveys, which vary in methods and costs. This discussion will be readdressed at a subsequent meeting. DRAFT OF ARTICLE FOR PELICAN BAY POST The Committee members made minor changes to the article prepared by Ms. O'Brien, and noted that the letter to the Pelican Bay residents regarding the Management Plan should be mailed in mid-April, approximately two weeks before the article is published. MORE DISCUSSION RE: SUGGESTED TIMELINE AND PERMIT APPLICATION In response to Ms. O'Brien's question as to whether the Services Division could begin the application process for the 10-year dredging permit,Mr. Hall indicated the process could be started; however,more data is needed and the application could not be completed until the Commissioners approve the Management Plan. ESTIMATED COSTS AND FUNDING SOURCE FOR PERMIT APPLICATION A 30 RELATED WORK Mr. Dorrill reported that the costs from Humiston&Moore for engineering and the associated exhibits and meetings would be $32,500, and this estimate would be provided to the Committee. Mr. Dorrill would meet with the County Manager next Friday to discuss the possibility of using Tourist Development Council (TDC)Fund 195 or General Fund 111 monies to cover these costs. Mr. Hall believed that the engineering cost estimate could go as high as $40,000. The bathymetric surveys were estimated to cost $13,000 to $26,000, and the cost for an initial bathymetric survey on the interconnecting waterways would also be obtained. It is hoped that the engineering costs going forward will be covered by Fund 195 or Fund 111 money. 3 Clam Bay Committee of the Pelican Bay Services Division March 18,2014 Minutes CANOE TRAIL MARKERS UPDATE Mr. Hall advised that the manufacturer has agreed to replace all the canoe trail marker poles they had originally sent as the pressure-treated timber was not treated properly. The manufacturer is also covering the contractor's costs. The County will pay for the additional wrapping. PROPOSED CLAM PASS PARK IMPROVEMENTS UPDATE Mr. Williams from County Parks and Recreation will be appearing before the Committee in the near future to present his master plan concepts for Clam Pass Park. Several s •gesti• , were made previously to Mr. Williams to incorporate into his plans. ' :�: 4.1 ADJOURNMENT Mr. Cravens motioned,Mr. Levy seconded to adjourn. Thi"lslolian carried unanimously and the meeting adjourned at 3;15 p.m. Susan O'Brien, Chairman 10/24/2014 8:42:32 AM 4 CLAM BAY COMMITTEE OF THE PELICAN BAY SERVICES DIVISION APRIL 8,2014 The Clam Bay Committee of the Pelican Bay Services Division met on Tues., April 8 at 1 p.m. at the Community Center at Pelican Bay located at 8960 Hammock Oak Drive,Naples, Florida. Clam Bay Committee Susan O'Brien, Chairman John Domenie Joe Chicurel Mike Levy Tom Cravens Pelican Bay Services Division Staff Neil Dorrill,Administrator Mary McCaughtry, Operations Analyst Kyle Lukasz Lisa Resnick, Recording Secretary Also Present Mohamed Dabees,Humiston&Moore Engineers, Inc. Tim Hall, Turrell-Hall & Associates Arielle Poulos, Turrell-Hall &Associates Clam Bay Stakeholders Henry Bachman Annice Gregerson Marcia Cravens Mary Johnson Peter Duggan Kathy Worley AGENDA 1. Roll call 2. Agenda Approval 3. Audience comments 4. Approval of February 18 and March 4 meeting minutesA ,A41 5. Suggested language on when/why to dredge 6. Discussion of draft text on parameters to be used to determine if dredging is needed' 7. Discussion of draft text on typical dredge cuts and maximum dredge cuts 8. Discussion of objectives for management plan 9. Discussion of edits re: Seagate on p. 6 of management plan and other edits needed 10. Possible new reports/activities for FY 2015 11. Timeline for approval of 10-year permit application 12. Update on boats in Clam Bay and revised ordinance 13. Discussion of Moorings Bay Advisory Meeting 14. Other 15. Adjourn 1 Clam Bay Committee of the Pelican Bay Services Division April 8,2014 Minutes ROLL CALL All Committee members were present and quorum established. AGENDA APPROVAL Mr. Cravens motioned,Mr. Domenie seconded to approve the agenda as amended[add-on item 8] The motion carried unanimously. AUDIENCE COMMENTS Mr.Peter Duggan, representing Linda Roth, asked the Committee if they would consider four statements,previously provided to Ms. O'Brien. The Chairman indicated that they would be discussing these statements, and both she and Mr. Hall had recommendations on the issues. APPROVAL OF MEETING MINUTES Mr. Cravens motioned,Mr. Domenie seconded to approve the February 18 minutes as amended[minor grammar corrections to p. 561. The motion carried unanimously. Mr. Cravens motioned,Mr. Domenie seconded to approve the March 4 minutes as presented. The motion carried unanimously. SUGGESTED LANGUAGE ON WHEN/WHY TO DREDGE Chairman O'Brien reported that Ms. Kathy Worley submitted information to her previously suggesting that water quality is another reason to dredge. Mr.Hall indicated that discussions to date did not address water quality as a reason to dredge and following much discussion,the Committee agreed that water quality would not be an issue addressed under this topic. Dr. Dabees' report on when and why to dredge was included. Dr. Dabees suggested that while the data is reported annually, he would prefer to see it on a monthly basis as that will give them a better chance of catching a problem before it is crucial. It was agreed and for clarification purposes,the information is being collected monthly, but the report is generated annually. DISCUSSION OF DRAFT TEXT ON PARAMETERS TO BE USED TO DETERMINE IF DREDGING IS NEEDED Dr. Dabees emphasized there should not be one red line that once that red line is crossed, dredging is required, or if the red line is not crossed, dredging is not required, and instead, recommended a set of several indicators or guidelines. 2 Clam Bay Committee of the Pelican Bay Services Division April 8,2014 Minutes Dr. Dabees noted through photographs the Pass itself in Section A is wider than before, but Section B is clogged. The Pass that was dredged a year ago is still open, and the water is flowing between the Gulf and Clam Bay. Dr. Dabees indicated that they are proposing that the monthly photographs and reports be checked for range, and if it is not stable,the Committee and the Board can be notified of necessary action. Dr. Dabees reviewed briefly the events of the past year,noting that the channel had meandered in various directions to stay open. The scope of the monitoring is the channel, Sections B and C and the flood shoal. The benchmark for Section A is greater than 300 sq. ft; and benchmarks for Sections B and C is greater than 450 sq. ft. Dr.Dabees recommended bathymetric monitoring at six months which was estimated to cost an additional $15,000. At this point, it was not known whether the Services Division would receive funds from the County for this. Dr.Dabees noted that before 2008 the Pass was stable and did not require any dredging; however,today it is unstable and he advocated applying for an emergency dreding permit. The Committee members agreed that the monitoring approach needed to be changed,but at the moment costs were an important issue as well. It was agreed that the Committee would be committed to testing annually, and if necessary, every six months. Number 3 would be used as the first trigger for testing as recommended by Dr. Dabees. The necessity of collecting for both symmetry and flow was discussed,with the tides being the main driver of the water in and out of the Bay. Fresh water flow changes the components, and that mix will vary. The benchmark graphs and parameters were reviewed by Dr. Dabees, and the averages were noted in sections A, B and C. Section A can self-correct,while Section B is much more challenged, with multiple factors contributing to it. There is a possibility that only Section B could be dredged, as Section C is very difficult to reach. Dr. Dabees indicated that he felt at this point that all the plans and specs were in place to do the proposal for the ten year permit plan. Ms. O'Brien stressed the need to stay focused to complete the Management Plan. Mr. Cravens suggested that Dr. Dabees continue to monitor the Pass, and if action to pursue a Nationwide dredging permit becomes necessary, he should then contact Mr. Dorrill. 3 Clam Bay Committee of the Pelican Bay Services Division April 8,2014 Minutes Dr. Dabees agreed and would prepare the text for the Management Plan that summarizes what is in the charts and the graphs, and provide it to the Committee members Mr. Cravens motioned,Mr. Domenie seconded, to recommend to the full Board that Dr. Dabees and Mr. Hall be authorized to apply or renew the Nationwide permit. The motion carried 4-1. Ms. O'Brien opposed. DISCUSSION OF DRAFT TEXT ON TYPICAL DREDGE CUTS AND MAXIMUM DREDGE CUTS The typical dredge cuts were previously provided, and text will be prepared for the Management Plan to explain and clarify what those recommended cuts mean by Dr. Dabees by April 21 for consideration before the meeting on April 24. DISCUSSION OF OBJECTIVES FOR MANAGEMENT PLAN A draft and an alternative draft were previously prepared for the Committee and included in the materials, and the order of the objectives as listed in the materials would be 1, 4, 5,2 and 3, and the numbers will be made consecutive to reflect that. The use of the words "water quality"was objected to in number 3, and the words "where possible"were taken out to meet the approval of the Committee. The word"protect"was taken out of number 5 and replaced with the word"monitor". The Committee agreed that they were comfortable with the Plan as prepared by Ms. O'Brien. The meaning of a nuisance species was discussed, and Water Management District defines them as a native species that grow counteractive to the objectives to be met. A native plant can become a nuisance, and the ability to act on that after review would then be permitted. The inclusion of information on fish and bird surveys was discussed at length, and the words "conduct periodic bird surveys to keep the species list current and in support of ongoing management activities"will be included in the Management Plan. A base line list of fish will be prepared as well for periodic surveys. C The County tracks sea turtle nests on the beaches and prepares detailed reports, and this information will be incorporated into the Management Plan and a baseline number of gopher tortoise burrows will be established and monitored every etw years. Specific terms to be used were agreed upon, and Mr. Hall will prepare the copy for the Plan on these items, and excerpts from the comprehensive information gathered by the Conservancy on benthic organisms will also be included. 4 Clam Bay Committee of the Pelican Bay Services Division April 8,2014 Minutes Monitoring of the access and use of the facilities was discussed, and Mr. Hall would wordsmith the various components of the objectives for the Committee. DISCUSSION OF EDITS RE: SEAGATE,PAGE 6 OF MANAGEMENT PLAN AND OTHER NEEDED EDITS The Committee discussed the boat docks and motorized vessels at Seagate and how to best word the Plan in this regard. Mr. Hall will prepare the appropriate language as suggested by the Committee on this issue and provide it to them at the next meeting. Language regarding the archeological sites within the NRPA will also be included. POSSIBLE NEW REPORTS/ACTIVITIES FOR FY 2015 FOR CLAM BAY The biological section was allotted approximately$8,000, and the bird and tortoise monitoring were being included as part of the Objectives of the Management Plan. Based on the Committee's discussions,Mr. Hall would revamp the numbers and participating parties as it relates to new activities and reports and bring them to the next meeting. „< UPDATE ON BOATS IN CLAM BAY AND REVISED ORDINANCE , Previous documentation was provided on the boating activities in Clam Bay, and Ms. O'Brien indicated that the sign and ordinance issues were on hold at the,moment;however, Mr. Hall will be meeting with one of the County attorneys the followin4 ay 4i these issues. oil ADJOURN 1 Mr. Cravens nil tee',Mr. Levy seconded, to adjourn. The motion carried unanimously and the meeting adjourned at 4:05 p.m. Susan O'Brien, Chairman 10/24/2014 11:53:35 AM 5 CLAM BAY COMMITTEE OF THE PELICAN BAY SERVICES DIVISION APRIL 24,2014 MEETING MINUTES The Clam Bay Committee of the Pelican Bay Services Division met on Thurs.,April 24 at 1 p.m. at the Community Center at Pelican Bay located at 8960 Hammock Oak Drive,Naples, Florida. Clam Bay Committee Susan O'Brien, Chairman John Domenie absent Joe Chicurel Mike Levy Tom Cravens Pelican Bay Services Division Staff Neil Dorrill,Administrator Mary McCaughtry, Operations Analyst Kyle Lukasz Lisa Resnick, Recording Secretary Also Present Mohamed Dabees, Humiston &Moore Engineers, Inc. Arielle Poulos, Turrell-Hall &Associates Clam Bay Stakeholders Peter Duggan Geoff Noble Annice Gregerson Linda Roth AGENDA 1. Roll call 2. Agenda Approval 3. Audience comments 4. Discussion of draft text on parameters to be used to determine if dredging is needed 5. Discussion of draft text on typical dredge cuts and maximum dredge cuts 6. Discussion of goal and objectives of management plan - ' 7. Discussion of suggested edits for the management plan 8. Possible new reports/activities for FY 2015 a. Expert's opinion on possible new reports/activities for FY 2015 9. Timeline and funding for 10-year permit application 10. Update on boats in Clam Bay and revised ordinance 11. Update on Moorings Bay Citizens Advisory Committee 12. Workshop on May 14 13. Next meeting a. Update on letter to Clam Bay Stakeholders b. Recommendations to make to full Board 14. Other 15. Adjourn 1 Clam Bay Committee of the Pelican Bay Services Division April 24,2014 Minutes ROLL CALL With the exception of Mr.Domenie, all members were present and a quorum established. APPROVAL OF AGENDA Mr. Cravens motioned,Mr. Levy seconded to approve the agenda as amended[add 8a, 13a, and 13b1. The motion carried unanimously. AUDIENCE COMMENTS There were no audience comments. DISCUSSION OF DRAFT TEXT ON PARAMETERS TO DETERMINE THE NECESSITY OF DREDGING After a brief discussion,the Committee asked Dr. Dabees to insert a note in the data indicating why dredging was done at certain times in the past. The Committee members went through the draft text, clarifying and changing certain language to better express the intent of and reasoning for the parameters to be used. Mr. Hall would be consulted as to the correct language as well. The variables provided by Dr. Dabees to determine if dredging was needed were included in summary fashion in the draft text, along with the pertinent, excerpted pages from his report. It was agreed that various tables provided by Dr. Dabees would be combined in the text when possible to provide more information, and language added for clarification purposes. DISCUSSION OF DRAFT TEXT ON TYPICAL AND MAXIMUM DREDGE CUTS The Committee discussed the sufficiency of the five foot buffer for the cuts at the mangroves used in the past, and refined the language to bevel eii 'ess the parameters for typical and maximum dredge cuts going forward. The Committee also discussed crafting language that would protect the intent and expectations included in the management plan, and both Chairman O'Brien and Dr. Dabees indicated that they would review their notes taken during this discussion and have them available for the next meeting. DISCUSSION OF GOALS AND OBJECTIVES OF MANAGEMENT PLAN Chairman O'Brien indicated that she and Mr. Hall edited the Goals and Objectives of the plan, a copy of which was provided to the Committee members. The Committee agreed that they would bullet point the objectives to make them as clear as possible, and an information board would also be put up to further enhance the recognition of water and shore birds and other 2 Clam Bay Committee of the Pelican Bay Services Division April 24,2014 Minutes wildlife seen in the Clam Bay area. Additionally, protected species, such as the gopher tortoise, can then be monitored as to sightings. The appropriate State and Federal permits to be obtained would be listed, and information on the copper levels and what steps the PBSD is taking to determine its possible impact was included to address questions the relevant agencies may have. SUGGESTED EDITS/OTHER ISSUES RE: MANAGEMENT PLAN The sentence indicating that the Seagate community homeowners were recognized as having many boats will remain in place, and the arrangement between the County and the Waldorf-Astoria as it relates to the adjacent park would be described as managed by the hotel. A few grammatical and form changes were made throughout the Plan, and the acronyms being used would be checked for accuracy. Where necessary, for clarity and completeness, additional verbiage was inserted. POSSIBLE NEW REPORTS/ACTIVITIES FOR FY 2015 A list of possible activities for the coming year was provided to the Committee members. A fair and realistic number to request for these activities was discussed, and the Committee agreed that the number would be left at $25,000. TIMELINE AND FUNDING FOR TEN-YEAR PERMIT APPLICATION The timeline and funding information was expected to be available on Mon.a "' UPDATE ON BOATS IN CLAM BAY AND REVISED ORDINANCE Mr. Cravens motioned,Mr.Levy seconded to recommend to the full Board to approve the r ordinance as amended today. The motion carried unanimously. UPDATE ON MOORINGS BAY CITIZENS ADVISORY COMMITTEE It was believed that the Moorings Bay Citizens Advisory Committee was no longer a problem and any future issues would be brought to the full Board. NEXT MEETING The Committee's next meeting was scheduled for May 22. ADJOURNMENT Mr. Cravens motioned,Mr.Levy seconded to adjourn. The motion carried unanimously and the meeting adjourned at 4:05 p.m. Susan O'Brien, Chairman 10/24/2014 3:23:46 PM 3 CLAM BAY COMMITTEE WORKSHOP MAY 14,2014 The Clam Bay Committee of the Pelican Bay Services Division held a workshop on Wed., May 14 at 1 p.m. at the Community Center at Pelican Bay located at 8960 Hammock Oak Drive, Naples, Florida. Clam Bay Committee Susan O'Brien, Chairman John Domenie absent Joe Chicurel Mike Levy absent Tom Cravens Dave Trecker ex-officio Pelican Bay Services Division Staff Neil Dorrill, Administrator Mary McCaughtry, Operations Analyst Lisa Resnick, Interim Operations Manager Also Present Mohamed Dabees,Humiston&Moore Engineers, Inc. Tim Hall, Turrell-Hall &Associates Arielle Poulos, Turrell-Hall &Associates Scott Streckenbein,Pelican Bay Services Division Board Clam Bay Stakeholders Henry Bachman Mike Bauer, City of Naples Brad Cornell,Audubon of Western Everglades Marcia Cravens Peter Duggan ; Ktt Annice Gregerson � Mary Johnson,Pelican Bay Foundation � _ Lisa Koehler, South Florida Water Management District Maura Kraus, Collier County Parks & Recreation } Robert Naegele,Pelican Bay Property Owneys:-MSOcAldfil" Patrick Parrott, Barrington resident Ted Raia, Mangrove Action Group Linda Roth z '` Kathy Worley, Conservancy of SWFL WELCOME Chairman O'Brien welcomed stakeholders. DISCUSSION OF FINAL DRAFT OF CLAM BAY MANAGEMENT PLAN Ms. Linda Roth addressed some changes and edits, and it was agreed that only the substantial changes would be discussed at the workshop. She noted additional language and 1 Clam Bay Committee of the Pelican Bay Services Division May 14,2014 Workshop Minutes edits for clarification purposes, and suggested that redundancy be removed. These changes were previously provided to the Committee members. The necessity of including all the data presently in the appendix was discussed. Ms. Worley suggested that if the information is included in the appendix, the intent should be clear. Ms. Roth also noted that her suggestion to include a paragraph related to the water movement into Clam Bay was not yet in the Plan. Mr. Hall explained the meaning of the documents Ms. Roth provided, and indicated that he had inserted wording in the Plan to address that issue. The objectives were reviewed briefly, and some small changes were made to the bullet points. It was further suggested that the responsible entities for the various facets of Clam Bay be listed in the Plan as it was in an earlier version, and Ms. O'Brien agreed that they can revisit that issue at the next Committee meeting. In response to Ms. Worley's question, Dr. Dabees indicated that the drawings on page 90 were a modification and reduction of the information from the previous dredging, and the red line is what is being recommended. Mr. Bachman suggested that it may not be clear of what the PBSD is responsible for. Chairman O'Brien noted that she felt it was clear in the text that the PBSD was fl responsible for the implementation of the plan. Additionally Mr. Bachman asked about funding for the many projects and activities noted in the Plan. Mr. Cravens agreed that the Plan does not specifically tag how activities are to be funded. Chairman O'Brien indicated that there is an overall tag at the Goal and Objectives lead-in regarding the availability of funding and staff, but that they would work on a stronger statement in this regard. Ms. Marcia Cravens spoke to the introduction and statements referring to the 1998 management plan as focusing on mangroves needed to be stricken and otherwise corrected. She alleged that the Services Division was not following the direction of the County Commission, which delegated the PBSD to update the existing 1998 Clam Bay Restoration Management Plan, and that the numerous organizations and people involved in the original plan were not mentioned 2 Clam Bay Committee of the Pelican Bay Services Division May 14,2014 Workshop Minutes in the PBSD version. Tables were disjointed, and referred the Committee to the 1995 Clam Pass Inlet Management Plan as it relates to habitats and land uses which she noted was outstanding. Ms. Cravens was asked to submit additional corrections to the Committee, as there were several that could not be mentioned in the time-frame available. Ms. Worley noted the need for consistency within the categories as to general statements as opposed to those of Clam Bay specifically. Ms. Worley would send structural suggestions and other notations and additions to the Committee members. Ms. Worley added that the Goals and Objectives needed to include a performance measure in order to evaluate it. The relationship between the stormwater management areas outside of the NRPA itself was raised by Brad Cornell,Audubon of Western Everglades, as it relates to the issue of the nutrients in Clam Bay. Fertilization in irrigation water was not addressed fully in the Management Plan. Also, the Plan should address sea-level life adaptations, stability, and how the tides can affect that dynamic. Dr. Dabees briefly spoke to the water level issues, and Mr. Cornell suggested that he craft some language to insert into the Plan that addresses that issue. It was also noted by Ms. Mary Johnson that this is a ten year plan that clearly states that ongoing information will be taken into consideration. She felt it was an excel flan e at the Committee needed to move forward from here. Dr. Ted Raia expressed concern about the surface water that has increased development that is overflowing into Clam Bay. Mr. Hall indicated that rainfall is about 52 inches, and irrigation is half that amM> *fin, and the range is 7$to 83 inches of water falling on the surface of the ground. The Management Plan recognizes the water coming from the upland areas, but there is also a sub-surface flow that also goes into the Bay, which they have no current detailed information on. The rain and the sub-surface flow are handled on a reactive basis; whereas the landscape water and lakes and those issues are addressed on a much more proactive basis. Ms. Worley suggested that the section on water reduction and the berm could be lifted from the 1998 Plan and inserted into the new one, which would answer many of these questions. Ms. Maura Kraus, Collier County Parks and Recreation Department noted that a wild turkey was sighted on the beach, as well as a flamingo. She noted as well that the Collier County Natural Resources Department had teams of biologists in the 1980s doing research on a large 3 Clam Bay Committee of the Pelican Bay Services Division May 14, 2014 Workshop Minutes area that included Clam Bay, and that there has been monitoring that includes sea turtles since 1990 that continues to this day. Ms. Kraus suggested these reports be included in the references and Ms. Cravens volunteered to provide them to Mr. Hall. Mr. Hall indicated that they have coordinated this with the County. Susan O'Brien Chairman0/24/ V,4:04 PM 4 CLAM BAY COMMITTEE OF THE PELICAN BAY SERVICES DIVISION JUNE 11,2014 MEETING MINUTES The Clam Bay Committee of the Pelican Bay Services Division met on Wed.,June 11 at 1 p.m.at the Community Center at Pelican Bay, 8960 Hammock Oak Drive,Naples,Florida. Clam Bay Committee Susan O'Brien, Chairman John Domenie absent Joe Chicurel Mike Levy absent Tom Cravens Dave Trecker ex-officio Pelican Bay Services Division Staff Neil Dorrill,Administrator Lisa Resnick, Interim Operations Manager Also Present Mohamed Dabees, Humiston&Moore Engineers, Inc. Tim Hall, Turrell-Hall &Associates Arielle Poulos, Turrell-Hall &Associates Clam Bay Stakeholders Henry Bachman Mary Johnson Marcia Cravens Linda Roth Peter Duggan Kathy Worley gvy AGENDA 44 1. Roll call 2. Agenda approval 3. Audience comments 4. Discussion of latest draft of management plan 5. Approval of management plan. 6. Discussion of copper data for Clam Bay and berm 7. Next meeting and suggested topics for same 8. CAC Funding for Clam Pass add-on 9. Adjourn ROLL CALL Chairman O'Brien, Dr. Chicurel, Mr. Cravens, and Dr. Trecker were present. Mr. Domenie and Mr. Levy were absent. AGENDA APPROVAL Mr. Cravens motioned,Dr. Trecker seconded to approve the agenda as amended[add "CAC funding for Clam Pass"]. The motion carried unanimously. 1 Clam Bay Committee of the Pelican Bay Services Division June 11,2014 Minutes AUDIENCE COMMENTS There were no audience comments. DISCUSSION OF LATEST DRAFT OF MANAGEMENT PLAN Mr. Hall had previously provided a draft of the Executive Summary to the Committee, Mr. Cravens provided a handout with some suggestions as it relates to the summary. The Committee agreed to make certain modifications and change some of the wording to make it clearer and easier to understand. The five objectives were looked at one last time, and minor wording changes were made for clarification. The area on dredging was refined and the wording was changed in certain areas to better reflect the intent of the Committee as well as improving the layout and continuity of the section. As it relates to Chapter 3, Mr. Hall explained how he had organized it and the areas of concentration, noting that most of the photographs would go into the appendix. The timeline was discussed and agreed upon, as was the sequence of the topics to be included. Mr. Hall noted that he hoped to have the changes made and the document finalized by the following Friday, and it was noted that it needed to be as near to perfect as possible. At Mr. Dorrill's suggestion, a copy would also be sent to the County Attorney's office. APPROVAL OF MANAGEMENT PLAN Dr. Trecker motioned,Mr. Cravens seconded to make a recommendation to the full Board to approve the Clam Bay NRPA Management Plan 6.1 as modified today. The motion carried unanimously. - ' It was agreed that the revised Plan'would be available on Friday by 4:00 p.m. DISCUSSION OF COPPER DATA FOR CLAM BAY AND BERM A graph of copper levels from December was provided to the Committee members. It was noted that the lab results were not received in a timely manner from the County's lab. The table showed a downward trend in the copper levels in certain areas, and the Committee discussed where the water samples have been obtained within the system. Mr.Hall would revise the sample sheets, showing both the tabular and graphical representations specific to copper and the locations where the samples were taken. Samples taken adjacent to the berm would not be included. The Committee also discussed determining whether or not equilibrium has been reached in the sediment, and what can be done in either case. 2 Clam Bay Committee of the Pelican Bay Services Division June 11,2014 Minutes NEXT MEETING AND SUGGESTED TOPICS FOR SAME The Committee agreed that they would take a short break before the next meeting is scheduled, and added that vessel control and the copper issue would be addressed at that time. Ms. O'Brien thanked the Committee for their hard work and dedication. CAC FUNDING FOR CLAM PASS The Coastal Advisory Committee (CAC) recommended funding for a number of things,_;-;: and assistance with the dredging schedule of Clam Pass was included in theirtie'anent a of$7,000. It was suggested that Mr. Dorrill follow-up with the CAC on thi - ADJOURNMENT Mr. Cravens motioned,Dr. Trecker seconded to adjo ' n care animotis and the meeting adjourned'at 3:08 p.m.. ‘,612‘A` „-":44.4 „ y Susan O'Brien, Chairman 10/23/2014 1:37:23 PM 3 February 18,2014 Clam Bay Committee of the Pelican Bay Services Division 7.Discussion of Turret-Hall&Associates contract renewal Page 1 of 2 TURRELL HALL & ASSOCIATES INC. MARINE&ENVIRONMENTAL CONSULTING 3584 Exchange Avenue,Suite B•Naples,Florida 34104-3732•(239)643-0166•Fax 643-6632•thall@turrell-associates.com June 2,2011 RECEIVED JUN 0 7 2011 Pelican Bay Services Division PELICAN BAY SERVICES DIVISION Mr.Kyle Lukasz 801 Laurel Oak Drive,Suite 605 Naples,FL 34108 Re: Proposal for Professional Environmental Services Clam Bay Biological Studies(Contract 10-5571)-Fiscal Year 2010-2011 Dear Mr.Lukasz: Turrell,Hall&Associates,Inc.is pleased to provide you with this proposal for environmental services.Based on the Request for Proposal and the newly issued County contract(10-5571),we propose to continue annual biological monitoring of Clam Bay with the following scope of services. Task I-Annual Biological Monitoring to include sampling and photographs Lump Sum$22,250.00 • Task II-Seagrass Monitoring of outer Clam Bay and nearby channels Lump Sum$4,680.00 Task III-Tidal Data Collection,Analysis and Hydrographic Reporting Lump Sum$28,750.00 Task IV-Water Quality Data Analysis to include coordination of data from PBSD,data input and annual analyses to compare past and present trends Lump Sum$5,520.00 Task V-Water Level Data Collection to include installation and downloading Lump Sum$9,770.00 Task VI- Annual Report Preparation and Submittal Lump Sum$11,215.00 Task VII- Annual Report Presentation Lump Sum$3,600.00 Task VIII-Hand Dug Channel Inspection and Maintenance to include both verifying channel stability and oversight of maintenance events if the channels are filling-in Lump Sum$10,400.00 Task IX-Additional consulting services,meeting attendance,site investigation and research field observation and reports Time and Materials(Not to Exceed)$15,000.00 Reimbursable Expenses $1,000.00 ig 7-N .— +a7 L f 3S- 55 3 Yds Lump Sum Total..! $96,185.00 Time and Materials Total $16,000.00 HM - 2g��St� Other current annual Clam Bay-related expenses: Aerial photo $7500 Interior Channel Maintenance 32,500 Contract Labor (to offset staff time for water sampling, etc. 12,500 Tree trimming 38,000 Repairs/maintenance of tide gauges &water level loggers 500 Other operating supplies 500 Minor operating equipment 2,400 10-year permit application Biological services 39,000 Engineering services 32,500 Proposed new monitoring activities for FY 2015 Annual bathymetric survey of Clam Pass 26,300 Initial bathymetric survey of interconnecting waterways 25,000 Monitor archeological sites 750 Monitor gopher tortoise burrows 3750 Monitor plots in scrub and hammock habitats 6000 Inspect canoe trail and Clam Bay signage 300 Monitor upland activities that could affect flow 600 Promote education information re: exotic&nuisance species 700 Coordinate with Collier County&Waldorf re: vegetation & litter control 500 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver. 6.4 FDEP did determine that the Clam Bay System was impaired for copper and placed the Clam Bay system on the Everglades West Coast verified list for copper with medium TMDL priority(5 to 10 years for TMDL development). TMDL (Total Maximum Daily Load) is defined by the FDEP as the maximum amount of a given pollutant that a surface water can absorb and still meet water quality standards. Subsequent copper testing undertaken by PBSD has also shown periodic elevated levels of copper within the Clam Bay Class 11 waters. Beginning in 2015 PBSD's water quality monitoring program in the Clam Bay NRPA system will employ the sampling program used to establish the NNC. Sampling locations within the open waters of the NRPA will be increased and relocated from the 5 historical locations to the 9 locations subsequently established. These 9 locations are shown on Figure 18. Sampling will continue to be collected on a monthly basis. The suite of parameters collected and analyzed from the water samples will also be amended as outlined below in order to provide the information necessary to more easily interpret the compliance with the newly established NNC. • Field pH • Field Temperature • Field Salinity • Field Specific Conductance • Field Dissolved Oxygen (mg/1) • Field Dissolved Oxygen (%Saturation) • Ammonia • Chlorophyll a • Copper • Nitrate-Nitrite(NO3-NO2) • Nitrite(NO2) • Total Nitrogen • Orthophosphate(0PO4) • Pheophytin • Total Phosphorous The PBSD is developing an upland stormwater and nutrient management program that builds upon the Nutrient Management Plan previously completed by Pelican Bay Foundation. The Foundation Plan and ongoing nutrient management in process by the PBSD are designed to reduce nutrient and copper inputs into the stormwater system. Once completed,this program can be given to FDEP for review. If the FDEP is satisfied with the resultant reductions of copper resulting from the implementation of the program,the Calm Bay NRPA system could be removed from the impaired list. While the upland nutrient management program is not part of this Clam Bay NRPA Management Plan, the information garnered from that program will be important in future decision making associated with water quality concerns in the Clam Bay NRPA. PBSD will work closely with the Pelican Bay Foundation on nutrient management issues to coordinate and share information that may be integrated into management decisions and activities undertaken through this Management Plan. 33 CLAM BAY NRPA 1VIANAGEMENTPLAN Pelican Bay Services Divisio October 2014n Ver. 6.4 .4,...„..,;.1z 4 s '� rr .: S >,Itl. y} 1•2423 6•°:',"•- 4t Ate. `�-1 `$, .;1.81.25g. 0,44:44,54. ,'•"' .•k ,3: slid` IrAI 1.. :-�y • — ti •• 0.1! 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C L p ' .`-. , ,. , P U p • • • a r U >i Cir l October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 1 of 67 CLAM BAY NRPA MANAGEMENT PLAN October 2014 Version 6.4 PREPARED BY: I TURRELL HALL&ASSOCIATES,INC 3584 EXCHANGE AVENUE NAPLES,FL 34104 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 2 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.64 TABLE OF CONTENTS CLAM BAY NRPA MANAGEMENT PLAN EXECUTIVE SUMMARY List of Figures• °1 Acronym Key iv 1.0 Introduction 1 PURPOSE OF THE CLAM BAY NATURAL RESOURCE PROTECTION AREA MANAGEMENT PLAN 1 DEVELOPMENT OF THE CLAM BAY NRPA MANAGEMENT PLAN 1 ROLE OF THE PELICAN BAY SERVICES DIVISION 3 2.0 Overview of the Clam Bay NRPA 5 DESCRIPTION OF THE SYSTEM 5 ADJACENT COMMUNITIES 7 HISTORICAL OVERVIEW 8 MANGROVE DIE-OFF AND RESTORATION 10 3.0 Physical and Natural Resource Description and Assessment 12 SOILS 12 NATURAL COMMUNITIES 12 INVASIVE,NON-NATIVE AND PROBLEM SPECIES 22 LISTED SPECIES 23 OTHER SPECIES 24 HYDROLOGY 25 FRESHWATER COMPONENT 27 INLET DYNAMICS 28 WATER QUALITY 30 ARCHAEOLOGICAL RESOURCES 35 RECREATIONAL USE 35 4.0 Management Plan Goal and Supporting Objectives 37 OBJECTIVE 1-MAINTAIN AND PROTECT THE NATIVE FLORAL AND FAUNAL COMMUNITIES WITHIN THE CLAM BAY NRPA 38 OBJECTIVE 2-ENSURE THE ESTUARY HAS ADEQUATE TIDAL AND FRESHWATER FLOWS TO MAINTAIN ECOLOGICAL HEALTH WITHIN THE CLAM BAY NRPA 39 OBJECTIVE 3—MONITOR AND MAINTAIN WATER QUALITY WITHIN THE CLAM BAY NRPA 39 OBJECTIVE 4-MONITOR ARCHAEOLOGICAL SITES WITHIN THE CLAM BAY N RPA . 40 OBJECTIVES-ENSURE RECREATIONAL ACTIVITIES ARE ENVIRONMENTALLY COMPATIBLE WITHIN THE CLAM BAY N RPA 40 5.0 Clam Pass Dredging 41 A. DREDGING POLICY 41 B. DREDGING CRITERIA 41 1. BAY TIDE RANGE 41 2. CROSS SECTION OF FLOW AREA AND VOLUME OF SHOALED MATERIAL 42 3. INLET CHANNEL LENGTH 43 4. EBB SHOAL 43 C. DREDGING CONSTRUCTION 44 1. TYPICAL CROSS-SECTIONS FOR DREDGING 44 6.0 Authorized Construction Activities 48 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 3 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 LIST OF PERMITS FOR WORK UNDERTAKEN TO DATE AND RELEVANT LEGAL FRAMEWORK 48 7.0 Clam Bay NRPA Management Plan Amendments 49 Clam Bay NRPA Management Plan Stakeholder Groups and Review Agencies 50 Clam Bay NRPA Management Plan Bibliography 52 Appendix 1—Timeline of Important Events within the Clam Bay NRPA and a List of Permits for Work Undertaken in and Around the Clam Bay NRPA 1 Appendix 2—A Recent History of Mangrove Management in Clam Bay 2 Appendix 3—A Recent History of Seagrass Presence in Clam Bay 3 Appendix 4—Physical and Natural Resources 4 Appendix 5-Clam Pass Maintenance Dredging Design Criteria 5 Appendix 6-Exhibits 6 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 4 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 CLAM BAY NRPA MANAGEMENT PLAN EXECUTIVE SUMMARY The Clam Bay Natural Resource Protection Area(NRPA) is a 570-acre estuarine system consisting of sandy beaches,Clam Pass,shallow bays,tidal creeks or tributaries,seagrass beds,and mangrove forests on the west coast of Collier County in Southwest Florida. The NRPA includes three primary bays,Outer Clam Bay(southernmost),Inner Clam Bay(central),and Upper Clam Bay(northernmost),connected by a series of tidal creeks and connected to the Gulf of Mexico by Clam Pass. The preparation and implementation of the Clam Bay NRPA Management Plan has been undertaken by the Pelican Bay Services Division at the direction of the Collier County Board of County Commissioners. The Management Plan will provide guidance for future management activities within the NRPA, building on the successes of the 1998 Restoration and Management Plan, by outlining the goal and objectives designed to protect,maintain,and monitor the natural resources within the NRPA and foster responsible stewardship going forward. The Management Plan provides an overview of the natural resources and processes within the NRPA along with a summary of the surrounding development and a brief historical perspective of past events and activities which have affected it. Coordination with community members and stakeholders has been balanced with anticipated administrative and financial resources to develop the following goal and supporting objectives for this Management Plan. Goal: To establish the basis for management activities that will be undertaken to protect the health of the Clam Bay NRPA estuary. Objectives to support this goal include: 1. Maintain and protect the native floral and faunal communities within the Clam Bay NRPA 2. Ensure the estuary has adequate tidal and freshwater flows to maintain ecological health within the Clam Bay NRPA 3. Monitor and maintain water quality within the Clam Bay NRPA 4. Monitor archaeological sites within the Clam Bay NRPA 5. Ensure recreational activities are environmentally compatible within the Clam Bay NRPA In support of these objectives, periodic monitoring of the terrestrial and benthic habitats will be conducted. Encroachments into the NRPA by exotic and nuisance vegetation will be documented and scheduled for removal or control. Observations and documentation of the wildlife utilization and population estimates within the NRPA will be documented periodically. Monitoring of water quality and freshwater inputs into the NRPA will be continued. Archaeological resources within the NRPA will be periodically monitored, and any degradation will be reported to the State Historic Preservation Offices. Educational opportunities will be explored and acted upon to promote environmentally compatible recreational uses within the NRPA. Irresponsible or environmentally damaging activities will be documented and,where appropriate,reported to the proper authorities. Regular monitoring of the Clam Bay flora and fauna will be carried out to ensure that the ecological health of the NRPA is maintained. In addition, regular monitoring hydrologic conditions will be ii October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 5 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 conducted to track the stability of the inlet.The Management Plan outlines the parameters thatVeil166b investigated and used by qualified biologists and engineers to make recommendations to the PBSD and BCC on when and how dredging should be undertaken to maintain the long-term health of the estuary. Hydrologic Criteria Description Bay Tide Range Ratio Ratio comparison of the interior and Gulf tidal ranges Cross Sectional Area Area in different locations of the Pass through which water can flow Volume of Shoaled Material Quantity of sand and sediments within channel that can restrict flow Inlet Channel Length Distance water must flow through the beach and ebb shoal areas Ebb Shoal Distance from shore to the outer ebb shoal limits Ecological Criteria Description Mangrove Forest Examination of whether or not there are indications that the forest is being stressed by the lack of tidal flushing Sea Grass Beds Determine the extent of beds and whether or not dredging will directly or indirectly impact them Other Floral and Faunal Communities Determine if dredging could directly or indirectly negatively impact any floral or faunal components The Management Plan also includes typical dredging designs for the three main sections of Clam Pass and shows the cross sectional areas that could be dredged. All monitoring,investigative,and management activities from the preceding year will be compiled into an annual report and summarized in an annual presentation to the PBSD Board. Comparisons to historic data will be done where appropriate to track trends and make determinations as to whether additional interventions are needed to maintain the estuary's health. Biological monitoring, water quality monitoring, Pass bathymetry and status investigations, and any other activities conducted or data collected during the preceding year will be documented in the annual report. The Management Plan will be an integral part of permit application that may be required for management activities in the support of the Goal and Objectives. This includes permit applications for dredging Clam Pass and the interior cuts where the Management Plan will provide a blueprint for dredging criteria and conditions. The Plan will provide background information to permitting agencies regarding conditions that may be present, why management actions are being undertaken, and how impacts to the natural resources will be minimized. The document also allows for changes and modifications to the Management Plan should new information or management restoration techniques come to light that would benefit the Clam Bay NRPA. ii October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 6 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 List of Figures: Figure 1—Approximate extent of Clam Bay NRPA Boundary—Page 6 Figure 2—Historic Aerials of the location of Clam Pass—Pages 9-10 Figure 3—Soils map of the Clam Bay NRPA—Page 12 Figure 4—Beach habitat within the NRPA Boundary—Page 13 Figure 5—Coastal Scrub habitat within the NRPA Boundary—Page 14 Figure 6—Cabbage Palm Hammock habitat within the NRPA Boundary—Page 15 Figure 7—Open Water habitat within the NRPA Boundary—Page 15 Figure 8—Mangrove habitat within the NRPA Boundary—Page 16 Figure 9—Salt Marsh habitat within the NRPA Boundary—Page 18 Figure 10—Tidal Flat habitat within the NRPA Boundary—Page 18 Figure 11—Seagrass habitat within the NRPA Boundary—Page 19 Figure 12—Oyster locations within the NRPA Boundary—Page 20 Figure 13—Exhibit from Conservancy of Southwest Florida Report—Page 21 Figure 14—Hardbottom Community off-shore of the NRPA Boundary—Page 22 Figure 15—Approximate locations of Drainage Basins within the Pelican Bay Development—Page 28 Figure 16—Ebb and Flood Shoals—Page 29 Figure 17—Water Quality monitoring locations within and adjacent to the NRPA Boundary—Page 31 Figure 18—Proposed Water Quality monitoring locations within and adjacent to the NRPA Boundary—Page 34 Figure 20—Section A,B,and C of Clam Pass—page 42 Figure 21—Typical maintenance dredging cross-section—Inlet Channel—Section A—Page 45 Figure 22—Typical maintenance dredging cross-section—Seaward Flood Shoal—Section B—Page 46 Figure 23—Typical maintenance dredging cross-section—Bayside Flood Shoal—Section C—Page 47 iii October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 7 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Acronym Key BCC Collier County Board of County Commissioners CBRMP Clam Bay Restoration and Management Plan DHR Division of Historical Resources DNR Department of Natural Resources ESA Endangered Species Act FDEP Florida Department of Environmental Protection FEWR Florida Department of Environmental Regulation FLEPPC Florida Exotic Pest Plan Council FLjj #em Florida Land Use,Cover,and Forms Classificatio FSU Florida State University FWG Florida Fish and Wildlife Conservation Commissi FWS Fish and Wildlife Service LIDAR Light Detecting and Ranging MAG Mangrove Action Group MGD Millions of Gallons/Day ISTBU Municipal Services Taxing Benefit Unit NMFS National Marine Fisheries Service NNC Numerical Nutrient Criteria NIdAA National Oceanic and Atmospheric Administratio NRCS National Resource Conservation Services NRPA Natural Resource Protection Area PBID Pelican Bay Improvement District PBSD Pelican Bay Services Division PUD Planned Unit Development ST Sensitive Treatment TMDL Total Maximum Daily Load USACE U.S.Army Corps of Engineers USDA United States Department of Agriculture USFWS U.S.Fish and Wildlife Service WBID Water Body Identification WCI Westinghouse Communities Inc. iv October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 8 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 1.0 Introduction Purpose of the Clam Bay Natural Resource Protection Area Management Plan The purpose of this management plan is to provide guidance and direction for the protection, preservation,and maintenance of the Clam Bay Natural Resource Protection Area(NRPA). This plan will form the basis by which future management decisions can be made by identifying the appropriate techniques necessary to achieve long-term sustainability for the natural resources and their uses within the Clam Bay NRPA. This plan,in addition to providing a brief historical perspective of activities undertaken within this system,will identify the management goal and objectives;allow for development of methods to achieve the goal and objectives;and summarize implementation,assessment,and evaluation strategies that strive to balance resource protection with recreational use. While the 1998 Clam Bay Restoration and Management Plan(1998 Management Plan)primarily focused on mangrove health and recovery, this plan will address all floral and faunal components of the NRPA. The plan will draw from the 1998 Management Plan,input from multiple interested stakeholders,and historical biological,hydrological, and physical reports to outline the goal and objectives for future management of the ecosystems throughout Clam Bay. The 2014 Clam Bay NRPA Management Plan(Management Plan)and any subsequent revisions recommended by the Pelican Bay Services Division(PBSD)shall be submitted to the Collier County Board of County Commissioners(BCC)for approval. Once approved by the BCC,this Management Plan,or future amendments to the plan by the PBSD Board,will supersede all others and will serve as the primary guidance tool for future permitting and other management activities necessary to protect, preserve,maintain,and monitor resources within the system. Development of the Clam Bay NRPA Management Plan Turrell,Hall&Associates,Inc.served as the principal consultant for the Management Plan. This consultant firm has a long history of work in the Clam Bay NRPA and was primarily responsible for the implementation of the 1998 Management Plan that resulted in the successful restoration of Clam Bay's mangrove forest. The coastal engineering firm of I-lumiston&Moore,Inc.provided input and monitoring data for the 2014 Management Plan relative to Clam Pass and the dredging design criteria. The PBSD Clam Bay Committee consists of members of the PBSD Board,which is an advisory board to Collier County's Board of County Commissioners. The Clam Bay Committee met regularly in 2013 and 2014 and provided input and direction to the consultants. Additional regular input was provided by representatives of several stakeholder organizations,including the Mangrove Action Group,as well as several interested Pelican Bay residents. All Committee and Board meetings were properly noticed, open to the public,and allowed audience participation. Input was also solicited via notices to more than 30 area businesses, government officials and employees,condominium associations,and individuals who regularly use Clam Bay. These representatives were invited to participate in two 1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 9 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 meetings held in the spring of 2013. Some have attended and provided comments at the regular meetings of the PBSD Clam Bay Committee where drafts of the Management Plan have been discussed. Stakeholders were also notified in April 2014 that a draft of the Management Plan was available on the PBSD's website,and they were invited to send their comments to the PBSD's office and/or attend a workshop about the Clam Bay NRPA Management Plan on May 14,2014. A list of these area people/organizations is included with this Management Plan(pages 48 and 49). Pelican Bay Services Division Turrell,Hall&Associates,Inc. Chairman Tim Hall—Project Manager 801 Laurel Oak Drive,Suite 302 Arielle Poulos—Project Biologist Naples,Florida 34108 3584 Exchange Avenue (239)597-1749 Naples,Florida 34104 (239)643-0166 Humiston&Moore Engineers Brett Moore—Project Manager Mohamed Dabees—Project Engineer 5679 Strand Court Naples,Florida 34110 (239)594-2021 2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 10 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Role of the Pelican Bay Services Division In order for the management and maintenance of the Clam Bay NRPA to be successful,coordination between a myriad of local, state, and federal agencies and interested citizens groups is required. The PBSD has undertaken that role for most of the past fifteen years. The Pelican Bay Municipal Services Taxing and Benefit Unit(MSTBU)is a dependent special district that was formed pursuant to Chapter 125 of the Florida Statutes and was formally enabled by the BCC pursuant to Ordinance numbers 90-111 and 91-22. These ordinances were replaced in 2002 by Ordinance 2002-27 which further clarified the role of the MSTBU and the PBSD Board. This MSTBU was created to,among other things,provide for the maintenance of conservation and preserve areas within Pelican Bay. This responsibility was undertaken diligently from 1998 to 2008 and resulted in the implementation of the previous 1998 Management Plan and the recovery of the mangrove die-off areas. Per action by the BCC,the responsibility for many of the monitoring and maintenance activities associated with Clam Bay was given to Collier County's Coastal Zone Management Department from 2008 to 2012. In 2013,the BCC returned responsibility for the monitoring and maintenance of the system to the PBSD via Ordinances 2013-19 and 2013-61. It is under the PBSD's direction that this current management plan has been written. While the MSTBU is a dependent special taxing and benefit district,the PBSD is an arm of Collier County government and makes recommendations to the BCC. The PBSD implements its defined responsibilities within the Pelican Bay community,sets its own budget and agenda,and regularly submits them to the BCC for approval. The BCC has commonly approved the Clam Bay management activities,dedicated funds towards those activities,and authorized the development of this Management Plan. The PBSD's effective working relationship with the BCC is expected to continue as the PBSD serves as the official manager of the 2014 Management Plan,which is consistent with Ordinances 90- 111,2002-27,2013-19 and 2013-61 of Collier County. The PBSD will direct the Management Plan and has the responsibility for its implementation and operation over time. As such,the PBSD will plan and implement defined management activities with BCC approval whose purpose will be to protect,preserve,maintain,and monitor the natural communities and ecological integrity of the Clam Bay NRPA. The PBSD has several attributes which make it a logical guiding force in the management and maintenance of Clam Bay. The PBSD: ▪ is located within the Clam Bay drainage basin; • has an advisory board made up of residential and business members within Pelican Bay; • garners fiscal support for community projects,including Clam Bay NRPA activities,collected from local special assessments(non ad valorem taxes)of the residents and business members within Pelican Bay; 3 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 11 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 • is accessible to the public due to its local governing board and advertised public monthly meetings;and • has demonstrated a long-term commitment to the Clam Bay NRPA and a successful track record regarding its preservation,restoration and maintenance over the past fifteen years. These attributes give the PBSD the knowledge and expertise in matters of local concern and,in particular,the problems,opportunities,and interests of local residents as they relate to the Clam Bay ecosystem. Its relationship with the BCC gives it an additional level of access to technical expertise and oversight that will be necessary to assure that the Management Plan,as contemplated in this document,is fully implemented in the field. As part of its responsibilities,the PBSD will assemble and distribute various technical reports and assessments as required under the Management Plan,as well as coordinate with other public and private groups interested in Clam Bay. The PBSD is organized for and designed to maintain both its knowledge of the Clam Bay resources and to generate public support of the same. The PBSD will insure that the general public,residents in Pelican Bay.the PBSD consultants,and representatives from government agencies with jurisdiction over Clam Bay each have on-going involvement and input into the Management Plan. 4 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 12 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 2.0 Overview of the Clam Bay NRPA Description of the System The Clam Bay NRPA is a 570-acre estuarine system consisting of sandy beaches,Clam Pass,shallow bays,tidal creeks or tributaries,seagrass beds,and mangrove forests on the west coast of Collier County in Southwest Florida. The Clam Bay system is part of the Cocohatchee-Gordon River Transition referred to by the Collier County Department of Natural Resources as Coastal Zone II. It is one of the few remaining estuarine systems in the Cocohatchee-Gordon River Drainage System and the only coastal NRPA in Collier County. Historically the Clam Bay System was connected to Wiggins Pass to the north via a system of mangrove swamps and shallow creeks with intermediate open water areas that were excavated and are now known as Vanderbilt Lagoon(Collier County, 1994,Tropical Biohidustries, 1978). It is recognized that the connection was marginal at best and while passable at times,it was not uniformly and consistently navigable(Clam Bay Restoration and Management Plan, 1998). Connection to Vanderbilt Lagoon ended in 1952 with the construction of Vanderbilt Beach Road. Similarly,aerial photos of the Seagate Drive area taken prior to its construction show that Outer Clam Bay was connected to the mangrove swamps to the south via shallow meandering creeks and intermediate open waters leading to Doctors Pass. These creeks were only navigable by canoes and small skiffs(Turrell,2009). These swamps to the south were eventually excavated to become Venetian and Moorings Bays. The connection to Outer Clam Bay ended in 1958 when Seagate Drive was constructed. Today,the Clam Bay NRPA includes three primary bays,Outer Clam Bay(southernmost),Inner Clam Bay(central),and Upper Clam Bay(northernmost),connected by a series of tidal creeks and connected to the Gulf of Mexico by Clam Pass. The main creek system between the Pass and Bays is a multi-use waterway which at times sees swimmers,fishermen,boaters,canoers,kayakers,and paddleboarders all sharing the open waters of the waterways and the Pass. A canoe/kayak trail has also been permitted and markers installed throughout the system. The community of Pelican Bay abuts the northern and eastern edges of the system,while Seagate and Naples Cay communities abut the southern portion of the system. This system is an important natural and recreational resource for local residents and visitors. The Clam Bay system was designated a Natural Resources Protection Area(NRPA)by Collier County in 1995. The purpose of the NRPA designation is to protect endangered or potentially endangered species and to identify large connected intact and relatively unfragmented habitats,which may be important for listed species(Collier County, 1994). A timeline of important events that occurred within the Clam Bay NRPA along with a compilation of permits issued in and around Clam Bay are presented in Appendix 1. Clam Pass is a small,marginally stable inlet that has migrated north and south along the shore over the years. Prior to dredging,average water depths of Clam Pass were-2.5'to-1.0',and its width ranged from 30-50'(Collier County, 1994). The Pass remains the primary source of tidal exchange for the 5 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 13 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Clam Bay system,but it is restricted by sediment deposits just inside the Pass and in the long Ver.6.4 meandering tidal creeks surrounded by mangrove forests. a •z..t`1 t f � 1 tt K' �1 . V 74. U y fed. 444,''V d � : td ! • ,y.1w..` 'iia u, ''4 ,r Ae; 4 eT �:''."44.' & .. L. ',,"/ l,^ ',...."*It; liTi ''„_.C.,..,L -,- - kms' +Yr" aAY k 4. 4 � ;?. ge i. , i 4,4. i lE� t '50`.\'...,,-\f." a.:� gyp44,. t„, 'RAM kt.••f� /j M ' ;' 33 S : 1(gl�*Ot:• ME,.) BAY l j "k _ - 1 j-4.:7;_Y t: • h. . W is .4,17.-^' Vr H `�,, „,,17. rob. t• I / + • `;!,,,.=A'.74 <=3.%..9.t> F I -, N.. . r Pf, CLAM 3 L'.>� ''{� �55,li I aI 'l 4 PASS YL ,• 1 c°LUER c°UNTv _-.. %'�.�•'� I »N I i•. ' !A . CUM ' 1' ■ �' I + ,,lF,: - `Si V,F• c- .” ' Y �'� ft N►...L ' si `iir 'B r A.)f "1f"o`t {.i"Sf7,;, -ctY.. n± I' s!. -,..,,i-....v+ " •y• t NAPLES .:.j€ '� tREal -A E :.sI irk' ' . CLAY 'W .yPJ(yj P.. S'T a I.-. •r Figure I:Approximate ex ent o am :ay s J.floun,un. Clam Bay NRPA Vital Statistics Total acres:Approx.570 acres Beaches:Approx. 8,235 feet Beach Park:Approx.35 acres Mangrove: Approx.420 acres Seagrass: Approx.2 acres Open Water:Approx. 115 acres Latitude and Longitude of Pass:N 26° 13' 11",W 81°49'01"Section,Township, Range:Sec.32&33,Twp 48S,Rng 25E,& Sec.4,5,8,&9,Twp 49S,Rng 25E Water Body Identification(WBID)3278Q1 6 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 14 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Adjacent Communities The Clam Bay NRPA is bound on the north by the Bay Colony portion of the Pelican Bay development; to the south by Seagate Drive,and the Seagate and Naples Cay developments;to the east by the Pelican Bay development;and to the west by the Gulf of Mexico and the Strand neighborhood of Bay Colony that is within the Pelican Bay development. Pelican Bay is predominately a mixed-use residential community consisting of private single-family homes,villas,and both high and low-rise condominium units. The community also includes a 27-hole golf course,common areas with meeting rooms,tennis courts,beach park facilities,emergency services facilities,and commercial areas with shopping and hotels. The 2,104-acre Planned Unit Development (PUD)and Development of Regional Impact(DRI)was approved in 1977 as a partnership between Collier Enterprises and Westinghouse Communities(WCI). It was one of the first developments in Florida required to save fragile coastal wetlands and associated ecosystems(Urban Land Institute, 1981). The development of Pelican Bay had a limited impact on the wetlands themselves with approximately 94 acres,including about 78 acres in the northwestern corner of the property,being developed. This left the majority of the mangrove forest intact and preserved around the bays. As mitigation for these wetland impacts,the 570 acre preserve area,including the 35 acre beach park,was donated to Collier County and eventually became the NRPA which is in place today. Development of Pelican Bay required a stormwater management system designed to spread runoff along the eastern edge of the Clam Bay estuary. A four to six foot high and 2 1/2 mile long berm separates the developed portion of Pelican Bay from the estuary lying to the west of the development,but numerous culverts through the berm discharge water to a swale system along the eastern perimeter of Clam Bay. The eastern edge of Pelican Bay is about 12-14 feet above sea level at US 41,sloping in an east-west direction to about 2 feet above sea level near the berm. Six drainage basins operate on a gravity system to slowly move surface water into the receiving area of Clam Bay. Naples Cay is a high rise development consisting of 8 multi-story condominium buildings. The community also includes pools,tennis courts,approximately 33 acres of park and preserve areas,and two canoe and kayak launching piers. Construction on the first building in Naples Cay started in the late 1970's,and the last building was completed in 2002. Stormwater management is accomplished through several internal detention areas before water flows into Outer Clam Bay. The Seagate community is composed of about 80 single-family residences. The community was first laid out in the 1950's and still has a few undeveloped lots. Because development of this community occurred prior to stormwater regulations enacted in the 1970's,no community-wide stormwater system existed and septic systems were used for waste disposal. More recent improvements to the road and utility systems have allowed for some dry retention and sewer systems. Many of the homes within Seagate were built with boat docks along the community's man-made canals. Some homeowners keep motorized vessels at these docks. The 1995 Manatee Protection Plan acknowledges that access and use of Clam Bay by motorized vessels was limited due to the shallow nature of the bay and ephemeral conditions of the 7 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 15 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Pass. Vessels utilizing the Clam Bay NRPA waters are generally shallow drafted,and their access is limited by the day-to-day conditions of the Pass and connecting waterway. Clam Pass Park is a 35-acre County park providing beach access on the south side of Clam Pass. The Park is wholly contained within the NRPA boundary. Access to the Park is via a boardwalk through the mangroves from the parking lot at the very southern end of Pelican Bay. Operation and care of the Park is done under the supervision of the Collier County Parks and Recreation Department. Through an agreement between the County and the Waldorf Astoria Hotel,much of the day-to-day operation of the park is managed by the hotel. Historical Overview Prior to development,the entire coastline of South Florida would have resembled the Clam Bay ecosystem with meandering mangrove-lined shallow waterways buffering sandy barrier islands and natural terrestrial communities. Unique within the heavily developed coastal communities of Collier County,the Clam Bay estuarine system is a valuable resource for wildlife(particularly juvenile marine species and birds)as well as residents and visitors to the area who enjoy the low-impact recreational opportunities of the system. Within the Clam Bay system,four Indian shell ridges have been identified and indicate that this area was used for settlement by these civilizations. These ridges have been listed on the Florida Master Site Inventory as Clam Bay Shell Ridge,Inner Clam Bay Shell Mound,Brackish Hammock and Bayhead Camp(Hartwell,et al. 1994). Historically,Clam Pass was a small part of a coastal barrier island system of relatively shallow waterways and wetland communities extending from Lee County to Doctor's Pass. During the 1950's this system was isolated from adjacent mangrove lined creeks and bays by the construction of Seagate Drive to the south and the construction of Vanderbilt Beach Road to the north (see attached Exhibit, 1952 Aerial). The practical effect was to leave Clam Pass as Clam Bay's only connection to the Gulf. The Clam Pass opening has moved over its lifetime up and down the shoreline,influenced by major storm events and by man's alteration of the tidal prism and drainage basin that feeds the Pass. The shifting location of the Pass and its often tenuous connection to the Gulf is evident in the following series of aerial photos of the Pass over the past 60 years. Because of these conditions,the Pass is susceptible to outside events and can periodically close,which has happened six times in the last 25 years,most recently in 2013. 8 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 16 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 1 l''.1:S:::;,', / r S ( 4R CLAM CLAM '" i PASS PASS ,: %, i*s j , :1952 `. i 1962 h�R Y 54 *da � . tX te' SSi M .,,w CLAM SS PASS ;. `,, ds it . ti ;1985 `. A -7-°7-2'4,', 7 ter: 3 I '7 . k,,4 , t CLAM —7. ', ' PASS k 4a:`. Vii, k 2004 e _ `tij,f 9 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 17 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 t • CLAM PASS; - Figure 2:Historic aerials of the location of Clam Pass The health of the mangrove forest is directly related to the connection at Clam Pass. The exchange of seawater between Clam Pass and the Gulf is critical to the ability of the estuary to export organic matter,as well as to help regulate excess salt and freshwater. It also supplies oxygen-rich water from the Gulf and keeps metabolic wastes from accumulating in the sediment. A man-made water management berm now divides natural and developed portions where historically mangrove forest would have transitioned gradually into the mesic coastal hammocks and upland pine scrubs that made up the now-developed portions of the Pelican Bay community. With the development of the Collier County coastline,the Clam Bay NRPA has been protected as a managed natural system that preserves the essential features and ecological function of a mangrove estuary. The historical and natural events that have affected the Clam Bay system in recent times,along with governmental actions,scientific studies and management responses,are shown in timelines in Appendix 1. These depict the evolution of management activities in Clam Bay and provide the context for the management goal and objectives presented in this Management Plan. Mangrove Die-off and Restoration The first mention of stressed or dying mangroves within the Clam Bay NRPA came from the 1978 Tropical Biolndustries and Gee and Jensen report titled Carbon Flows in Portions of the Clam Pass Estuarine System, Collier County,Florida. Reports of stressed or dying mangroves continued through the 1980's and 90's. In 1995,a large area of dead and dying mangroves was documented encompassing approximately 42 acres adjacent to Upper Clam Bay(Turrell, 1995). By 1999,this area had expanded to approximately 50 acres(Turrell,2000). 10 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 18 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 The Clam Bay Restoration and Management Plan(CBRMP)was finalized in 1998 to address the mangrove die-off. The major objective of the plan was to restore the dead mangrove area through improvements to tidal flushing capabilities of the system,including enhancements to tidal flow into and out of the mangrove forest areas. This was accomplished through the dredging of Clam Pass and portions of the interior channels within the system,removing impounded fresh water from the die-off areas and the construction of a network of hand-dug flushing channels throughout the original die-off area and a few other areas exhibiting stress. In the fifteen years following the implementation of the CBRMP the mangrove forest has undergone a substantial recovery with over 90%of the original die-off area re-vegetated with new mangrove growth. Appendix 2 contains additional information regarding the mangrove die-off and restoration. 11 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 19 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 3.0 Physical and Natural Resource Description and Assessment NOTE: This section is repeated in appendix 4.It should not be repeated.It makes sense to keep here and delete the portions of section 4 that are repetitive and/or ancillary,not necessary,,or could cause challenges, when the information is not needed for the management plan. The goal and objectives of this Management Plan aim to manage and preserve each of the resources that make up the Clam Bay NRPA as a whole. The objectives of the Management Plan focus on natural communities,tidal and freshwater flows,water quality,archeological resources and recreational uses. :;- Comment[kl]:Don't think this belongs here as it is in the management section where it seems more appropriate and is repeatitive Soils Based on the National Resource Conservation Service(NRCS)"Soil Survey of Collier County Area, Florida"(NRCS, 1998)there are 2 different soil types(soil map units)present within the NRPA boundary:frequently flooded Durbin and Wulfert muck;and Canaveral Beaches Complex. These mapping units named for soil series represent the dominant undisturbed soils in the landscape that existed predevelopment. The unit descriptions do not recognize or appropriately interpret the drastically disturbed nature of urban landscapes created after the soil survey was completed. f11-7- - .� •V• �f%r0,i 1111111) re • N� ;02 • Cac(ti ' s-+ .�� ,I A 7�I 93 Natural Communities In this Section,a natural community refers to the mix of plant and animal species that form the natural basis of the Clam Bay NRPA. A combination of factors,including geology,climate,topography,soils, wind,waves,storms and anthropogenic influences,determines the specific types of plants found in any given area. These plants are a major factor in what type of animal species that may be present,including threatened and endangered species that may utilize the Clam Bay NRPA. The Florida Department of Transportation's Land Use,Cover and Forms Classification System(FLUCFCS 1999)has been used to identify the plant communities found within the Clam Bay NRPA. See the attached Exhibits for an overall FLUCFCS map of the Clam Bay system and the existing monitoring plots within these habitats. 12 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 20 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 List of FLUCFCS Communities within the Clam Bay NRPA FLUCFCS Community Description Upland or %of Clam Bay Code Wetland NRPA 181 Swimming Beach Upland 5.95 186 Community Recreation Facilities Upland 0.40 322 Coastal Scrub Upland 3.97 428 Cabbage Palm Hammock Upland 0.45 510 and Interior Creeks and Bays(with and Wetland 23.16 540 without direct connection to Gulf or Ocean) 612 Mangrove Swamp Wetland 64.60 642 Saltwater Marsh Wetland 0.04 651 Tidal Flat Wetland 1.43 911 Seagrasses** Wetland 0.84". **included in the Bays(541)category Several other components of the Clam Bay NRPA ecosystem including hardbottom,oyster,and other_ Comment[KW2]:Table listing is out of 1 benthic faunal communities are not specifically addressed in the FLUCFCS classification system. sequence with the teat Additional historical information on the mangrove and seagrass communities are included as appendices to the Management Plan. FLUCFCS Code 181-Swimming Beach /0 * * 1t". , ,`1.p «,{+,�•� {,f Y�'C t7 TIT:- a 'F:- i,?"--,404404:"y'�' • t ;as x L 3 'y ,,fir is Iihfa . ted' rr ilrY '0. ((e} 4 4^YYN'.ryi 181 _- Figure 4:Beach habitat within the NRPA Boundary There is approximately 8,235 linear feet of beach within the Clam Bay NRPA in three distinct segments. Contiguous beach habitat extends from the NRPA habitat both north and south along the 13 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 21 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 coast. Shorebirds feed on marine invertebrates,such as coquina clams and mole crabs,at the water's edge,and beaches are a crucially important habitat for nesting sea turtles. This particular habitat has been monitored periodically in terms of width as part of the Collier County Beach renourishment program,though no conclusive statements can be made about the floral or faunal details of the ecotone over the years. Large-scale generalizations based on the annual aerial photographs can be made that the overall size,composition,and health of the habitat have remained relatively stable, and with the exception of the areas immediately adjacent to the Pass. Management concerns for the swimming beach are loss of beach area due to natural erosive processes and recreational over-use of the resource. FLUCFCS Code 322—Coastal Scrub :A-75-7.k.';')\y�y',i��[ ■ 1,.�•tf tja� -���j� '17�t}t�. �f`� �i\�a.���� dti.� 'Orr' ';�P�1 • � ,.R`t-;y •r} •! N±1�4 Nokx.,��"4' r�r 322 Figure 5:Coastal Scrub habitat within the NRPA Boundary Landward of the frontal(beach)zone area is the back dune zone(also often called the coastal shrub or scrub zone). This portion of the dune is more stable,has greater organic matter,and supports less salt tolerant grasses and shrubs as well as some trees. Coastal scrub is represented by a conglomeration of coastal species generally found in a narrow band between an estuary and the beach. Many of the woody species found in coastal scrub are low growing due to low nutrient and droughty conditions of sandy soils. High winds and salt spray often prune the terminal buds of the trees and shrubs growing on the dunes and result in salt-pruned,windswept canopies. Species common in the coastal scrub zone of the Clam Bay system include:seagrape(Coccoloba uvifera),cabbage palm(Sabal palmetto),buttonwood(Conocarpus erectus)and Spanish bayonet (Yucca aloifolia). This is an important habitat as it helps anchor the back dune sands and provides habitat for several listed plant and animal species including the gopher tortoise(Gopherus polyphemus). 14 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 22 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 The primary management issues of concern in the coastal scrub are gopher tortoise habitat management and exotic vegetation control. FLUCFCS Code 428—Cabbage Palm Hammock i. . a :••1‘l',4,0",,..:: . ''',v0510%k' '7:%,,,t; 7(3 .::( . ': --..r..t..5f 6•:',f 4! t'N't..*te'S.,'"citPC['t.",.11 ettkor ii ;' . . 428 x42$ Figure 6:Cabbage Palm Hammock habitat within the NRPA Boundary This forested zone is composed of dune vegetation and is located inland of the coastal scrub-farthest from the Gulf of Mexico. The Cabbage Palm Hammock habitat consists primarily of cabbage palms (Sabal palmetto)and is found in sandy soils. In the Clam Bay NRPA it is generally found in pockets located between the mangrove forest and the coastal scrub zone or beach areas. The primary management issues for this habitat are exotic control and preventing destructive visitor access. FLUCFCS Code 510 and 540—Interconnecting Creeks and Bays(with and without connection to the Gulf) �j � 17 � k , 'Z`rb ..s 4. 4 fit t _ 'I; i.;:, '..,.="6,J Figure 7:Open Water habitat within the NRPA Boundary 15 minumnii October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 23 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 The Clam Bay NRPA contains the three larger bays associated with Clam Pass(Outer,Inner,and Upper)as well as the interconnecting shallow creeks and small open water areas. These bays and interconnections serve as the life blood of the estuary. These open water habitats serve as the basis for many other communities. Seagrass beds,oyster bars, clam beds,and other benthic communities can all be supported to varying degrees with the open waters of the bays and interconnecting creeks. Tidal creeks are passageways for fish and marine invertebrates between waters of the Gulf and the protected embayments of Clam Bay. Manatees,dolphins,and turtles may also use the Pass. Scouring action of the fast flowing tide generally prevents colonization of seagrasses and other benthic flora. Management concerns related to the bays and associated creeks include maintaining sufficient flow through them to accomplish flushing needs of the system,stabilization of the Pass without harming other components of the NRPA,and educating recreational users of the NRPA of the need to protect the shallow water habitats and the communities located therein. FLUCFCS Code 612—Mangrove Swamp(Forest) ��yy K + -, ,,.;it s ti. wn{ • r „v r „ 4„,. , -_,.„ .,„ „..„.„ _,,,,, . 64,45 ,, ` ;. NA: liwor i' + 1► IR t { 16"21415 -*Axa..:'ea•.w.,. •..was.,.,,.. .....-.....• 612 ---- Figure 8:Mangrove habitat within the NRPA Boundary Mangroves are salt-tolerant trees that grow in tidal areas of the tropics and are legally protected for their ecological value and function,such as: • Providing habitat for marine,terrestrial,and avian wildlife. • Protecting coastal areas from storm surges and coastal erosion. • Improving water quality by acting as a natural filter for land-based freshwater run-off. • Forming the basis of a highly productive estuarine food chain which includes many commercially valuable species. • Enhancing the atmosphere by absorbing carbon dioxide and reducing greenhouse gases. Approximately 65%of the Clam Bay NRPA is composed of the three most common mangrove species in Florida,namely red mangroves(Rhizophora mangle),black mangroves(Avicennia germinans),and 16 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 24 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 white mangroves(Laguncularia racemosa). All three species have special biological adaptations to cope with salt and unstable,mucky,low oxygen soils that result from the tidal,hence continually waterlogged,environment. The dominance of mangroves in tidal areas is a function of these adaptations and their ability to out-compete other wetland plants. Tidal flushing allows nutrients to be distributed within the forest and provides for the transportation of dead leaves,twigs,etc. As this material decays,it becomes food for marine life. It is this mangrove detritus which is consumed by the many organisms at the base of the food chain which,in turn,creates the next level of the food chain necessary to support the fish populations that characterize the mangrove community. The Clam Bay mangrove community is composed of both riverine(along the creeks)and basin forest components. Riverine(Creeks)Mangroves On the waterward edges of small islands and the tidal creeks,passes and estuarine waterways that make up the Clam Bay system,a fringe of red mangroves can be found growing up to 25 feet in height. This zone can be just one or two trees in depth or extend landward for some distance, depending on topography. The habitat provided by the prop roots of these red mangroves is of great importance to many fish and other aquatic organisms. Forests The majority of the Clam Bay mangrove habitat is low-lying basin forest where the dominant mangrove species varies between red,white,and black through the forest habitat. Portions of this forest community were affected by the mangrove die-off. The hand dug flushing channels were constructed throughout this community to increase the tidal flushing capacity through the forest and drain impounded freshwater out of the forest into the bays and tributaries. Special attention has been given to the mangrove community in the past because of the die-off which occurred between 1991 and 1997(though stress in the community was documented as far back as the late 1970's). The die-off affected black and red mangroves initially but eventually ended up encompassing some white mangroves as well. More details on the recent history of the mangrove management are provided in Appendix 2. Management concerns within the mangrove habitat include ensuring adequate tidal flushing, preventing freshwater impoundment,and protection from exotic vegetation or pest!infestations!, comment[Km]:Missing freshwater marsh section 17 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 25 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 FLUCFCS Code 642—Saltwater Marsh ' ,,,,,,,., .„„, 10''''-*: ir :br t 9 y.T'7c �:r— Ys"� .r.^ w'''r, 1 T i_TW,"t ^gY . :, ,,,,,, ., ,,. , ..„„:„,,,,, ,,,, ,,,,,, 1 �h�4% , t1., aa� 4,a, , � ,, �, _!:. r�,�;�t� : �? Figure 9:Salt Marsh habitat within the NRPA Boundary At the interface between forested mangrove areas and the water management berm in Pelican Bay are depressional areas that have become colonized by aquatic freshwater plants,such as cattails(Typha latifolia),Carolina willow(Salix caroliniana),bulrush(Scirpus californicus),needlerush(Juncus romerianus),and leather fern(Acrostichum danaeifolium). Wildlife,such as otters(Lutra canadiensis),alligators(Alligator mississippiensis),various turtles,and wading birds can be commonly observed. These areas require regular maintenance to prevent the spread of nuisance and exotic plant species and ensure optimal functioning and interface between the natural mangrove forest and the water management system. Management concerns for this habitat are to prevent exotic vegetation infestation as well as ensuring appropriate water and salinity levels. FLUCFCS Code 651—Tidal Flats p s••. ��� .;'J'. li 1, 'M »!�... I L �L ! a. `'?sCAISI 1 t.t 1-" I 03. _ ,, Figure 10:Tidal Flat habitat within the NRPA Boundary 18 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 26 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 The sand and mudflats of Clam Bay are rich feeding grounds for many species of fish and wading birds. These organically rich sediments support a variety of mollusks,worms,and invertebrates that scavenge detritus or,in the case of many bivalve mollusks,extend siphons at high tide and filter vast quantities of water. Birds,such as a variety of herons,ibis,egrets,and spoonbills pick through the sediment for the invertebrate food sources. The dredging of the Pass associated with the 1998 Restoration and Management Plan resulted in an increase of exposed tidal flats within the southern portion of the system. Increased tidal range resulting from the dredging allowed more area to be periodically exposed during the tidal cycle. Some of the area that had supported seagrasses prior to the dredging work were converted into the tidal flats by the increased range and reduced phase lag. Management concerns related to the tidal flats include the templates established for dredging, resultant currents that could be expected as a result of dredging,and frequency of disturbance. FLUCFCS Code 911—Seagrass Beds • ..mss * • •i { ,yg � r_;1 ; , �V. U +^ F 4 es-rV ; Zl 4, vois rSatr ' v • - GRASS Figure 11:Seagrass habitat within the NRPA Boundary Several areas within the Clam Bay system host seagrass beds,specifically Outer Clam Bay and waterways just inside Clam Pass(Exhibits#'s??). Three species are commonly found in these Clam Bay waters:turtle grass(Thalassia testudinum),the largest with flat strap shaped leaves;the smaller shoal grass(Halodule beaudettei(flea wrightii)),with narrow,flat blades;and paddle grass(Halophila decepiens),with the smallest,paddle shaped leaves. Shoal grass is by far the most common though a small area of turtle grass has persisted since the 1998 dredging.Paddle grass is more ephemeral in nature,and diligence is required to be able to locate it. Seagrass coverage in Clam Bay has varied over time but is predominately found in Outer Clam Bay and the waterway between this bay and Clam Pass. A 1994 Collier County report estimated seagrass coverage at approximately 10 acres. Pre-dredge surveys conducted in 1999 estimated coverage at 5.13 acres (losses primarily due to 1994-1999 dredging operations). Annual monitoring of seagrass beds along the monitoring transects has estimated coverage from approximately 1.2 acres in 2003 to the current estimate of 2.85 acres from the 2013 survey. It 19 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 27 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 should be noted that the coverage estimates are taken from along the survey transects only and doer.6.4 not account for other scattered grasses that may be located elsewhere in the system. Management concerns related to seagrasses include direct impacts due to recreational use and potential dredging templates,turbidity and water quality concerns related to flushing(too much or too little)and stormwater inputs,and algal infestations due to nutrient increases. A history of the seagrass monitoring efforts in Clam Bay is included in Appendix 3. Other Benthic Habitats Oyster Bars IL ss t v-`hh, .10 Sia -- c :,`�,, r• '1 13 t' APPROXIMATE OYSTER LOCATION"-- Figure 12:Oyster locations within the NRPA boundary Oysters(Croassostrea americana)are filter-feeding bivalves,which were once common within the tidal creeks of Clam Bay(Humm and Rehm 1972). Deteriorating conditions,in part related to past dredging and clearing activities and closures of Clam Pass,are thought to have resulted in the disappearance of oyster bars in the system,though some reoccurrence has been observed to the south of the Pass in the last few years during seagrass transect monitoring. Oysters have been documented around the perimeter of Outer Clam Bay in past years'monitoring efforts. A 2011 benthic habitat assessment conducted by the Conservancy of Southwest Florida found living oyster clusters in the upper reaches of Upper Clam Bay(a single cluster),in the tributary between Outer and Inner Clam Bays(a single cluster),and throughout the shoreline of Outer Clam Bay. Management concerns related to oyster growth are similar to the seagrass concerns,namely protection from dredging,water quality deterioration and recreation. 20 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 28 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Other bivalve mollusks In addition to oysters,the 2011 benthic habitat assessment conducted by the Conservancy of Southwest Florida also found two other bivalves within the Clam Bay system. The pointed venus clam (Anomalocardia auberiana)and the stout razor clam(Tagelus plebeius)were both observed. Turrell, Hall&Associates,Inc.benthic surveys found several beds of southern hard clams(Mercenaria campechiensis)also present in the system. These mollusks are generally found within the shoal and tidal flat areas of the system and could be susceptible to impact during dredging or other disturbance operations. Management concerns would be protection from recreational users,water quality deterioration,and dredging. -Ia 1. o' -roma+�,j r4 •-u.+ + ,.w*x%" f}. 1"‹41 1,: nip .41" L ,.5: � . T y as - �Ak.� •i E �t �£� sy Figure 13:Exhibit from Conservancy of Southwest Florida Report Tubiculous Polychaetes Tubiculous polychaetes(tube worms)are typically the most abundant biological assemblage in Clam Bay and are primarily associated with muddy and sandy substrates.Polychaetes,including worm tubes and mud tubes,shell-encrusted polychaete tubes(Polychaeta)and trumpet worm(Pectinaria gouldi) tubes,are a vital component of the estuarine food web,providing key linkages between primary producers and higher trophic levels. Polychaetes create habitat and food for many organisms,such as mollusks,fish and even sea turtles. These worms are usually filter or deposit feeders that keep the substrate aerated and free of waste accumulation.Polychaetes tend to dominate Inner and Outer Clam Bays,with lower occurrences in Upper Clam Bay,the Lower Tributary,and,to a lesser extent,the Upper Tributary.Management concerns include protection from dredging,water quality deterioration and recreational users. 21 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 29 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Hardbottom Communities Ver.6.4 '4:41.4,0,-,‘ r+,� 4+w'w lS. i r. r �4r '.�',"" S:'�S'". ` ,, OUTER r� ?''• ! +:'' r CLAM BAY .) ':.["e ,r - INNER uPGER CLAM BAY ' S !' ,.. ✓.�lell� A° CLAM BAY 0.110r.. ...1°.° .e GULF OF t'",•-`"� MEXICO igure . 'ar..ottom ommunity0'-s ore o t e '' .oun•ary Another important marine habitat marginally associated with the estuarine system is the hard bottom reef community found just seaward of Clam Pass. In about 10-15 feet of water a variety of sponges, stony corals,gorgonians,fish and associated invertebrates can be found within a system of rocks and ledges. Outcroppings of similar habitat type occur along the length of Collier County and are a little known resource of regional significance. Collier County has mapped this resource through side scan sonar surveys in 2005 and 2009 as part of its beach renourishment project. The landward edge of this habitat is located approximately koci feet _- Comment[k4]:See attached report which said the sandy bottom extends 200 ft after which starts offshore from the Pass. the hard bottom 1995 clam pass....rpt Management concerns related to this habitat include recreation use and potential turbidity impacts resulting from dredging,beach renourishment or other management activities within the Clam Bay NRPA. Invasive,Non-native and Problem Species In an ecological context,an invasive species is one that is aggressive in growth and expansion of range and tends to dominate other appropriate native species. Its establishment and dominance can cause widespread harm to an ecological system by altering the species composition,susceptibility to fire and hydrology of an area. Non-indigenous species(i.e.,non-native or exotic species)are those that have been introduced purposefully or accidentally to an area outside their normal range. Category I species are those that have been documented to drastically alter natural communities by displacing native species. Category II plants have increased in abundance or frequency but have not yet altered Florida plant communities to the extent shown by Category I species. FLEPPC Category I plants observed within the Clam Bay NRPA boundary: - Brazilian Pepper(Schinus terebinthifolius) 22 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 30 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rlrtnhar/111d Melaleuca(Melaleuca quinquenervia) Australian Pine (Casuarina equisetifolia) Beach Naupaka(Scaevola taccada) Earleaf Acacia(Acacia auriculiformis) Shoebutton Ardisia(Ardisia elliptica) Air Potato(Dioscorea bulbifera) Lantana(Lantana camara) Old World Climbing Fern(Lygodium microphyllum) FLEPPC Category II plants observed within the Clam Bay NRPA boundary: Coconut Palm(Cocos nucifera) Wedelia(Sphagneticola trilobata) Oyster Plant(Tradescantia spathacea) Mahoe(Talipariti tiliaceum) These species will be removed or reported to the responsible entity for removal. Listed Species State and federal wildlife agencies will review any proposed management activities within the Clam Bay NRPA to determine if impacts to listed species will occur. While there are many listed species (State and Federal)that utilize the Clam Bay NRPA,the six listed below have garnered the most scrutiny as being vulnerable to impacts associated with Pass maintenance activities. These,as well as other listed species that do or potentially could utilize the NRPA,are listed in Appendix 4. Smalltooth Sawfish(Pristis pectinata) Observations of smalltooth sawfish have been documented within the Clam Bay NRPA. Smalltooth sawfish are found in the tropical and subtropical Atlantic Ocean. In the western Atlantic they have historically ranged from New York to Brazil,including the Gulf of Mexico and Caribbean Sea. Habitat destruction and overfishing have succeeded in eradicating the smalltooth sawfish from the majority of its former range. Consequently,it survives in small pockets throughout its current range. The last remaining population in U.S.waters is off south Florida,a small remnant of a population that once ranged from New York to Texas. Mangrove Rivulus(Rivulus marmoratus) This small fish has not been identified within the Clam Bay system in previous surveys or field work but is typically found in mangrove swamps and could be present in the upper reaches of the Clam Bay NRPA. The mangrove rivulus is primarily a saltwater or brackish water species,with limited occurrence in freshwater. Within the Everglades and along Florida's west coast,this fish occurs in stagnant,seasonal ponds,and sloughs as well as in mosquito ditches within mangrove habitats. The mangrove rivulus is able to survive in moist detritus without water for up to 60 days during periods of drought,anaerobic,or high sulfide conditions. 23 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 31 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division /lrtnhar)n1 d Loggerhead Sea Turtle(Caretta caretta) Loggerhead sea turtles have been documented nesting on beaches within the Clam Bay NRPA. Loggerheads are circumglobal,occurring throughout the temperate and tropical regions of the Atlantic, Pacific and Indian Oceans. They are the most abundant species of sea turtle found in the U.S.coastal waters. In the Atlantic,the loggerhead turtles range extends from Newfoundland to as far south as Argentina. The loggerhead turtle was first listed under the Endangered Species Act as threatened throughout its range on July 28,1978.In September 2011,National Marine Fisheries Service(NMFS)and U.S.Fish and Wildlife Service(USFWS)listed 9 Distinct Population Segments of loggerhead sea turtles under the Endangered Species Act(ESA). The population in the Northeast Atlantic Ocean Segment is listed as endangered. The agencies are currently proposing Critical Habitat designations on several areas which contain a combination of nearshore reproductive habitat,winter area,breeding areas,and migratory corridors. The Clam Bay NRPA is contained within the LOGG-N-27 segment of this proposed critical habitat area. Gopher Tortoise(Gopherus polyphemus) Gopher tortoises and their burrows are found along the coastal strand portions of the Clam Bay NRPA. The range of the tortoise includes southern portions of Alabama,South Carolina,Louisiana,Mississippi, and Georgia as well as most of Florida. Piping Plover(Charadrius melodus) Piping plovers have been rarely sighted foraging or resting along the shoreline within the Clam Bay NRPA boundaries. No nesting activities have been documented within the NRPA. West Indian Manatee(Trichechus manatus) Manatees have been sighted on numerous occasions within the Clam Bay NRPA boundaries.Manatees can be found in shallow,slow moving rivers,estuaries,saltwater bays,canals,and coastal areas particularly where seagrass beds or freshwater vegetation flourish. Manatees are a migratory species. Within the U.S.,they are concentrated in Florida in the winter. In summer months,they can be found as far west as Texas and as far north as Massachusetts,but summer sightings in Alabama,Georgia and South Carolina are more common. Other Species Lists of plant and animal species that have been observed within the Clam Bay NRPA and the adjacent Pelican Bay development areas can be found in Appendix 4 of this Management Plan. These lists are not all-inclusive but represent a wide array of the species found within and adjacent to the Clam Bay NRPA habitats. 24 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 32 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division flrtnhor 7n1 Hydrology Hydrological regime,sometimes referred to as the surface water or surficial hydrology,in simple terms describes the long term spatial variation in the water depths and period of inundation within a wetland system. This is because the surficial hydrology has both horizontal and vertical components and provides key ecological functions to the mangrove forest(Lewis,pers.comm.,2008). With respect to the horizontal component,incoming water(both tidal and surface water run-off)into an estuary brings with it nutrients,dissolved oxygen,and marginally lower salt concentrations. (Conversely,the outgoing water leaving a mangt ove wetland removes some of the metabolic waste Comment[KW5]:More documentation is that satu products(e.g.carbon dioxide and toxic sulfides)and excess salt. The vertical component refers to the wastes remain on site and only exit a overation within the system is reached—i.e.we are over incoming water that percolates down into the sediment and root zone,and the sediment drainage,on a polluting it falling tide which removes metabolic wastes and excess salt.Vertical movements also include fresh or salt water upwellings,which have been documented in the northern terminus of the Clam Bay NRPA. The movement of salt and fresh water into and out of the estuary is critical to managing ecological functions such as salt dissipation and organic matter cycling. It follows that anything that affects the /=' Comment[KW6]:Freshwater is not an l system and alters the abilityof the system toperform these functions,will,in most instances,cause ecological function it is a necessary component of Y Y the estuary stress to the system and,at some point in time,result in the death of the system or portions of it. Hydrologic studies indicate that the tidal flushing capacity of Clam Bay prior to the restoration dredging was limited and almost insignificant in Upper Clam Bay. The preliminary hydrographic assessment of the Clam Bay system prepared by Tackney&Associates,Inc.(August 1996)demonstrated rather dramatically that there was a significant reduction in tidal range in Inner Clam Bay. Tackney described the flow in that area as"measurably reduced"and"very inefficient". The connecting tidal creek between the Pass and Inner Clam Bay is the key conduit for tidal input and outflow to the northern reaches of the Clam Bay system.Its constriction and the ancillary constriction of tributaries connecting to it impact the quantity and quality of the flushing that can occur in Inner and Upper Clam Bay. Another key aspect of the surficial hydrology is the vertical location of the water level elevation relative to the sediment elevation. Specifically,the mean low water(tide)elevation has to be sufficiently lower than the sediment elevation in order for sediments to drain during low tide. A persistent high surface water elevation stops sediment drainage and results in anoxic sediment and the accumulation of toxic waste products. The absence of meaningful exchange was certainly a contributor to the significant degradation of the mangrove system within Clam Bay. (Tackney 1996;Lewis pers. comm.,2008). In this context Tackney observed that,even in the absence of rainfall,the average water surface elevations for the inner and upper bays were higher than the average surface elevation for the Gulf. Analysis of the tidal data indicated that average water surface elevations in the Inner and Upper Clam Bays were both elevated above the average Gulf water surface elevation by approximately 0.2 feet.This indicated that the tidal range in Inner and Upper Clam Bays was muted and that the system was receiving significant additional water through runoff and restricted capacity to drain additional inflow. In fact,in portions of the Tackney study no tidal fluctuation was noted in the Upper Clam Bay and only 25 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 33 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhor 1111 marginal tidal effects were observed in Inner Clam Bay. The reduced tidal ranges were also accompanied by relatively large phase lags. The phase lag is the average time delay measured in hours and minutes between the occurrence of slack(high or low)water in the Gulf of Mexico and the measurement stations. It is affected by both the distance between measurement stations and the amount and quality of hydraulic resistance of the connecting channel. The longer the distance and the higher the resistance,the more pronounced one would expect the phase lag to be. In the upper bays,high and low waters generally occurred over three hours later than the Gulf tides. These conditions indicate that the tidal creeks connecting the interior bays are hydraulically very inefficient. As a result,the upper bays are prone towards extended periods of flooding as a result of freshwater runoff and the inability of the system to drain efficiently. During Tackney's field studies of May 1996,rainfall of approximately 4 inches in three days was adequate to flood the Upper Clam Bay above high tide levels and sustain this flooded condition for over two days. Accordingly,he concluded that the creeks and bays that serve to connect the Inner and Upper Bays were significantly less efficient in the ebb tide stage than they were in the flood stage. Studies undertaken by both Lewis Environmental Services,Inc.and Turrell&Associates,Inc.would support this conclusion(Turrell, 1995). Finally,an additional attribute of the system that is directly related to tidal prism and the quantity of inflow and outflow is the question of inlet stability. Inlet stability refers to a tidal inlet's capacity to adequately scour out deposited sediments and prevent inlet closure. For a given wave environment, inlet stability is governed primarily by the volume of water(tidal prism)carried by the inlet. To remain stable,an inlet must have the characteristic that a temporary constriction in cross-sectional area produces an increase in current velocities adequate to scour out the constriction. To function without mechanical intervention,the system must generate a sufficient volume of water on the ebb tide to scour out the inlet naturally,otherwise the inlet will,over time,continue to close. This is particularly true during periods of high wave activity and low tidal ranges. (Turrell 1995;Tackney 1996). The six closures of Clam Pass that have occurred in the past twenty-five years indicate that stability of Clam Pass is marginal. (Turrell 1995;Tackney 1996,Humiston 2010). Since implementation of the 1998 Management Plan,the hydrologic conditions of the Clam Bay System have improved considerably,resulting in the restoration of the mangrove forest. 26 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 34 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhor 7n1 Freshwater Component Under predevelopment conditions,much of the area's rainfall was held on the surface of the land in sloughs and other low areas. This water would either slowly filter through the soil to recharge the shallow aquifer or move through the mangrove community to the bay. Less than ten inches of the approximately 53 inch average rainfall is estimated to have been lost from the uplands east of Clam Bay as surface runoff. The storage capabilities of the land thus moderated surface flows,preventing extremely high flow rates during the rainy season and serving to maintain surface flow and groundwater flow during the dry season(FDER 1981). The development of Pelican Bay had limited fill impact to the Clam Bay system,but it did modify the pattern of freshwater entering the Clam Bay system(Wilson,Miller et.al., 1996). The surface water management system as designed,permitted,and implemented at Pelican Bay employs a series of detention ponds,swales,and culverts to regulate the discharge of run-off into Clam Bay wetlands. Discharge occurs almost continuously along the eastern perimeter of the conservation area. Run-off from the northern end of Pelican Bay is collected and discharged into Upper Clam Bay. In 1996, irrigation water for 27 holes of golf and landscaping in Pelican Bay was approximately 3.0 MGD, which approximates 26 inches per year of additional rainfall equivalent(Wilson,Miller et.al., 1996). According to the report the irrigation water was added to the average rainfall for South Florida(—53 inches/year),yeilding an effective rainfall of approximately 80 inches plus annually. This is significant,particularly when viewed in the context of predictable storm events that have the potential for altering the amount of average rainfall entering the Clam Bay system. The"Pelican Bay Water Management System—Stormwater Detention Volume and Water Budget Analysis"(Wilson,Miller,Barton&Peek,Inc.April, 1996)describes the water management system as being divided into six watershed or drainage basins. Rainfall and irrigation either seeps into the ground or runs off into surface water management retention or detention areas for gravity drainage westward to the earthen dam(berm)through weirs that control discharges into the wetland..The surface water detention plan for Pelican Bay has a standard,permitted design capacity to hold the first inch of stormwater during a 25-year storm event. The surface water management system was designed such that the post-development surface water run-off rate does not exceed pre-development rates.Stated differently,the system is designed to discharge surface water in the development portion of Pelican Bay in the same manner that it discharged surface water prior to development. Stormwater runoff from an additional 130 acres of watersheds,outside of Pelican Bay,contributes a supplementary and significant volume of discharge to Clam Bay,representing an estimated 7.9%of the total stormwater discharge to Clam Bay(REF WHERE GOT 7.9%FROM). 27 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 35 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division Ctrtnh sr 7ni s '1( 111-,_'":","'''' ,e' �p t r 1.1.11.414 V; w...} All',l�' o. ''-,y r- p t ''� r_,_":1'._.___' 5 X 13 ' j-/,Y ,k e 1:144.:-,e z ' 9 �: "10rife` ez- `� , t ' l •-./1 r ' 4i 75sy?1 1 C .f61 iV. r \nt` la 1_4? , Wo' '•I ,4 fi r-''''' '-01?a ,f, 4. �'� `k ..:47,-,";::„St "�F �y �I BASIN A;���.y' BASIN 3 y.,,:. .. ,,,--,,,- ��i 1 �.�/�%�� ��t I 7,' . l s It p-` R y Y '" , a '• a ds X9,6- '�_1r BASIN 1 -1 i 'r.' 3,71y,f. IM.4.,,t-,-.14,,vigria„,1,1?,,t‘ltf dr4t4in,*''',4,,141.t ti-t':.4ar iiC,Te'l.r4;" 41A;:.,^4,- 111 .':iii:;-'1V,10'1,3,,-ti �i „� ..._ � �e ., y ' 4 Figure 15:Approximate locations of Drainage Basins within the Pelican Bay Development(photo is oriented with north to the left and west down). As the area of Pelican Bay to the east has undergone development,it has increased the impervious surface area,with a concomitant increase in surface runoff,which is eventually discharged to Clam Bay wetlands. The daily irrigation water volume enhances the saturation of the uplands which reduces their ability to accommodate rainfall volume,thus effectively increasing surface and groundwater discharge. Groundwater discharge can be commonly observed throughout the eastern side of Clam Bay and is discernible as a very slight sheet flow. Where this water encounters a discharge system,even one that is not operating at peak efficiency(from an engineering,not historical,standpoint),such as Outer Clam Bay,excess water is effectively removed from the system. However,during the mid-1990's in the northern section of the black mangrove forest,sheet flow and stormwater runoff was not being efficiently removed due to lack of flow through the forest and anthropogenic impediments to the ___%' Comment[KWh]: there is documented evidence Freshwater accumulated within the mangrove basin,increasing soil saturation and raising the mean that the strand road impedes underground Flow to and from the gulf of mexico water table elevation above ground level causing water impoundment,and overwhelming the black mangrove's anaerobic soil/gas exchange mechanisms. The construction of hand-dug flushing channels in the mangrove forest,undertaken as part of the 1998 Clam Bay Restoration and Management Plan, alleviated freshwater impoundment and allowed mangroves to become reestablished throughout the die-off area. Inlet Dynamics Clam Pass is a small inlet on the southwest coast of Florida that provides a tidal connection to approximately 570 acres of wetland preserve in the 570 acre Clam Bay NRPA. The relatively small tidal prism of Clam Bay provides a critical balance between tidal flow in and out of the inlet channel and littoral processes moving to the inlet. This affects the inlet hydraulic efficiency over time,especially 28 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 36 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rlrtnhor?ma when littoral transport rates are high due to periods of high wave energy. 29 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 37 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rlrtr,hor 1n111 The morphologic features of a tidal inlet include ebb shoal,flood shoal,and inlet channel. The flood shoal includes the sand shoals on the bay side of the inlet channel. The flood shoal is less dynamic than the Gulf side of the inlet as it is influenced mainly by tidal flow and sheltered from the varying wave conditions on the open coast side. The ebb shoal features can be explained as a sand bar forming a delta on the open coast side of the inlet. The ebb shoal delta shields the inlet channel from waves and provides pathways for sand transport along the coast to bypass the channel without shoaling the inlet closed. . i //), u 9. i . a a, ,'11.1111 �"` ,. 11 i Figure 16:Ebb and Flood Shoals.Figure provided by Humiston&Moore A stable inlet system requires an ebb shoal feature that prevents rapid shoaling at the inlet mouth. The inlet channel maintains its flow cross-section through tidal flow that scours the channel,while the waves are moving large amounts of sand along the coast. The stability and dynamics of a tidal inlet are based on the balance of the two forces of tidal flow versus wave-induced current and sand transport. The direction of wave action plays a significant role in the shape and dynamics of the inlet features. Clam Pass is marginally stable but subject to shoaling,and therefore requires regular monitoring to determine if dredging is needed. The relatively small bay area compared to other estuaries in Southwest Florida provides adequate tidal flow to keep the Pass open under typical conditions. The narrow nature of the flood shoal area surrounded by the mangrove forest limits the flood shoal capacity to maintain an equilibrium volume and bypass additional sand to the Gulf and bay waters. The accumulation of sand over long periods of time,especially within the flood shoal and inlet channel, creates additional resistance to flow. This additional resistance causes a reduction in the tidal range within the bay system and consequently reduces the flow through the Pass. If this occurs,maintenance dredging to restore flow rates may be needed. 30 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 38 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rlrtnhor 7n1 During the 1990's Clam Pass was subject to channel migration as well as closure,and dredging was necessary to keep the inlet open. In 1998 the Pelican Bay Services Division developed the Clam Bay Restoration and Management Plan that was approved by the Collier County Board of Commissioners. The purpose of the plan was to address the mangrove die-off by improving tidal flushing into and out of the mangrove forest areas and drain excess freshwater trapped within the mangrove forest. This was accomplished through the dredging of Clam Pass and portions of the interior creeks within the system, as well as the construction of a network of hand-dug channels throughout the original die-off area and several other areas that were exhibiting stress.Hand-dug channels often cut through root systems of mature mangroves to reach the die-off areas.This action ultimately resulted in uprooting and killing several trees as they could not withstand tropical storm winds due to destabilization caused by the hand-dug channels.While installation of the hand-dug channels assisted in die-off recovery,they also resulted in the death of several mature Comment[KW8]:Don't just say the good this was a lesson learned The implementation of the Clam Bay Restoration and Management Plan resulted in a significant increase of the tidal prism compared to conditions prior to 1999 and the eventual recovery of over 90% of the original mangrove die-off area. In addition to the 1999 dredging,dredging occurred in 2002,2007,and 2013. The 2013 dredging took place following inlet closure in late 2012 after the passage of Tropical Storms Debbie and Isaac and high-energy wind and wave conditions. The inlet was reopened in April,2013 and tidal exchange between the bay and the Gulf of Mexico was restored to near design levels. Water Quality During the initial environmental permitting of Pelican Bay,the agencies required water quality testing within the Pelican Bay subdivision and the Clam Bay estuary to help evaluate the impact of development on Clam Bay. The water quality testing program was first implemented by the Pelican Bay Improvement District(PBID)starting in the early 1980's.In 1990 the PBID became the Pelican Bay Services Division(PBSD),a dependent Division of Collier County. The PBSD continued the testing program after 1990. The PBSD is currently the responsible entity for the testing program. The water quality testing has been performed at several sample points within the Pelican Bay surface water management areas and within the Clam Bay estuary. The historical sample point locations are shown on the Figure 17 on page 31. The sampling locations included 5 locations within the open waters of the system and 4 locations along the surface water management berm. Sample points W-7(located in the creek near the north Pelican Bay Foundation boardwalk);W-6(located in the creek near the south Pelican Bay Foundation Boardwalk);W-1 (located near the kayak launch area at the southern end of Outer Clam Bay);North Seagate(located on the north side of the Seagate culverts between Venetian Bay and Outer Clam Bay);and Upper Clam Bay(located at the very north end of Upper Clam Bay)are within Clam Bay,and are categorized as Class II waters by the Florida Department of Environmental Protection(FDEP). The remaining four sampling points are PB-13(located north of the Sandpiper parking lot on both sides of the berm);PB-11 (located between the St.Maarten condominium and the Commons on the east side of the berm);Glenview(located between the Glenview and Stratford 31 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 39 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nrtnhnr'Jf11 A condominiums on the east side of the berm);and St.Lucia(located adjacent to the St.Lucia condominium on the west side of the berm),which are located in the surface water treatment portion of the property(Class III waters)within Pelican Bay. 32 SubmittedPage October o2o 8f b,6y27 O14Kathy ClamCommitteeo14 of the Pelican Bay Services Division BWorley,ay102 7/ CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division n,fro,.,-mid .. . -r .;.-.. Eyli..7.,j'lt .,4_' ..1:.•i 4' t ....r.. .1,041 ,,,,,IC,;,,.%-gqf'' '" ', 1\1 ,-4.-4-- X:4', „, -.... -.` '..'Nt''''-'rf..- f:".• .l'11-r):.!.: „,..44,,, ,,,i, .„; 441;vg, 1.1 t,d171116 - 41,;litil 1, -0 - . .c.-...,- ), .- ).... . ....0 .... . 1 4 . i'''''''_7.414, ..k 0,r,V I -,,,.!ii.,-;•1 ii....,i:v' y:::;14.rptt! ,,- ,4":,..t...,4424176444.E..; Jfir do, • ,41„er,:,it ii., ,yy.7,-, ' ''''--ii! ,.b., L F..i7l7i..a.1,'l IN f LNGG LLOOCCAATTIgOONNSS i. •Z,i,..2!...,,,A...4.::"_. .;-' . ' - - P- .1'. ".7tvi -.4"—."". ' • I ti.„44 lt.:,,:44 :::;'1.,„'. ''..k '2.-.'";''' ,,,,.'' :46W4 $,4';41.-f 4.2:•1 1 4,24.4„ ft3.....•,Voi,f4'.43•4', 1.. -t....* P B-1.7 ''. T. . ' i.. .0.1110 0 r' ' ..,'. if.'..4'..4........ . 4.4: ....ir,R t r Leiii+,-. ..7."..i... , • . ''''':' 'tL -3,' 14 :-- ,,, .,. ..1 .1:1-ammeNienld i.. •-,,--. ,4. .-..,,,...4 ::;' r.,-.':.,.*,,: ' :4•.-2.-- '. IF:uscTiA.....:. ;.......- - -'.' A ,-,...:-..,,,,il i,..- -.,;(.,1 i_,.. .- •-- \ , 1..- I., V "...''''.1..' •;, •- : , PT':;',' ..: - " , ,#J. •. • i ,-1-,:r':A,'', . 1;•'. ...' - •• - ', , ,.NO '41,46%..(1:3,„*I„, i. ,` .-' • q 1 i tt, * 'I ' 'A'•%'. 2 :•.: i ' -66 1r-4- ,- - :f‘„!t.?, 17;"?;7' ,,, • '',or. '. ,*-14`;‘,:!:ts:!:" 1 . ,., --.. - , ..'- ' it&, .- "01-*.••tr,'t- p-, -. ,- , '''' 144 . . • 4'41.. • ..A,4' ' r: - -: ,'. '. „ .t..... `.4 i '.,*;!".',,':-.' .71'1"1- '.. '...:17,"aA,1*•-•--0-",',..! n-,,L -• . - *....,-.**ft• 4ro 1,, - - • • Ni-,....s.:. .1.-r7W1*.,,, ----- c-,. I-- , ' . , `.• '"''' -.”:', • ,,,,. vii,...-.. 1:- • ,-5: t • .•••4' . ---.--- 1-`,. ,,, --7--v,s34:-.... L., • . plena% ,,, „...,4... :,,...limp \ — :__,t. .',-'" - orH- - • . . -i tsgo..1 ,-;.4*. v.: ,.',.2.::,:' .10,- igr:Arill'2."1-..--..-, ''' -; .tNV, ,r• -.1;f,---,t-,''t,; i ?•,;i.•.'• : ig:i..., -----ri5A'...: *...."tt,zr 4 •-e4g. *--.., ,Jit::?,r.ri.:,,,At"i :,--, ' '. • - Figure 17:Historic Water Quality monitoring locations within and adjacent to the NRPA Boundary 33 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 41 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lctr hor?nl A Water quality sampling is conducted within the Clam Bay system on a monthly basis. The samples are collected by PBSD staff and transported to the Collier County Pollution Control laboratory for processing. Parameters sampled and collected,include: • Field pH • Field Temperature • Field Salinity • Field Dissolved Oxygen • Ammonia • Carbon—Total Organic • Chlorophyll a • Copper(added to the parameter suite in 2013) • Nitrate-Nitrite(NO3-NO2) • Nitrite(NO2) • Nitrogen—Total Kjeldahl • Orthophosphate(0PO4) • Pheophytin • Phosphorus -Total • Residues—Filterable(Total Dissolved Solids(TDS)) • Silica(Si02) Water quality sampling results of nutrient loading seem to indicate that Pelican Bay's surface water management system is doing its job. No evidence of nutrient loading has been observed within the Class II waters though several spikes and elevated nutrient(nitrogen and phosphorus)levels have been observed from the testing locations along the berm. It is believed that the spikes were correlated with fertilizer application within the community. Water quality sampling within the Clam Bay NRPA in 2011 and 2012. Based on these sample results, FDEP made an initial determination that Clam Bay could be impaired for both dissolved oxygen(DO) and copper. As a result of coordination between FDEP,Collier County,Pelican Bay Foundation,and involved consultants,FDEP made a determination that the oxygen levels in Clam Bay were natural,and the system was not listed as impaired for DO. During the last several years Collier County and Pelican Bay Foundation consultants worked with FDEP to develop site specific alternative criteria(SSAC)for total nitrogen(TN)and total phosphorous(TP). These site specific alternative criteria are now included in the State's adopted water quality standards in the Florida Administrative Code Chapter 62-302.532. The determination of whether or not the sites'nutrient levels meet the adopted criteria is based on an analysis of the relationship between TN and conductivity and/or TP and conductivity. 34 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 42 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division Ctrtnhnr"Jr11 d FDEP did determine that the Clam Bay System was impaired for copper and placed the Clam Bay system on the Everglades West Coast verified list for copper with medium TMDL priority (5 to 10 years for TMDL development). TMDL(Total Maximum Daily Load)is defined by the FDEP as the maximum amount of a given pollutant that a surface water can absorb and still meet water quality standards. Subsequent copper testing undertaken by PBSD has also shown periodic elevated levels of copper within the Clam Bay Class II waters. Beginning in 2015 PBSD's water quality monitoring program in the Clam Bay NRPA system will employ the sampling program used to establish the SSAC. ISamplingi locations within the / Comment[k9]:The correct term is site specific open waters of the NRPA will be increased and relocated from the 5 historical locations to the 9 alternative criteria and the acronym used is SSAC locations subsequently established. These 9 locations are shown on Figure 18. Sampling will continue to be collected on a monthly basis. The suite of parameters collected and analyzed from the water samples will also be amended as outlined below in order to provide the information necessary to more easily interpret compliance with the established SSAC. • Field pH • Field Temperature • Field Salinity • Field Specific Conductance • Field Dissolved Oxygen(mg/I) • Field Dissolved Oxygen(%Saturation) • Ammonia • Chlorophyll a • Copper • Nitrate-Nitrite(NO3-NO2) • Nitrite(NO2) • Total Nitrogen • Orthophosphate(0PO4) • Pheophytin • Total Phosphorous The PBSD is developing an improved surface water management program.that is designed to reduce nutrient and copper inputs into the surface water system. Once completed,this program will be reviewed by FDEP.Once FDEP is satisfied with this plan and implementation results in copper reduction,Clam Bay could be removed from the impaired list. 35 October Submitted 28by,2014Kathy ClamWBayorley,C10/27/ommittee2014 of the Pelican Bay Services Division Page 43 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division MI5; (rtnhor')Od t. J ' t'i Vr #6 _ '-q,;-;'.,2l .•,2 66'.x,� i! wx+` r:S .,,. ..,,4363 3` �� 11 wti,�. . >•,, '4:'' ` t'4 ,..J "1 8168' l,......� UPCM T''coca T'0 rn NRRA r (Y,v t �_r -pA7ED LOCAilOh ADJACENT TO NRPA • 1.4 a..MQ '��+Tj("�t• JI'"t ewsnNG LocnnONAwACENT ro NRPA �c.` �Rx r• !vy 0!..1 r�.�{ .� fes'. Yi. • . 't P4f.1 1 $ r f x <"" 1.2 115" .a.. rir ,_4,. ' . .1: 3' yiw' Y" z „ _ r � '� �' F ST 2265722+c La �; a ��r - LUGA r. =1.81283 AT'.” 5 d '"-: x. .o- :11.10,1 IoP1.1•713% *,...,...,;..,4. , , it - TP ,Sa1 1 3 !ter 'e ,t p 4 gdr4,0.t ..... .. ... . 1 33 • 44., .E ,. ,�` '� . r 4 > s 3 .- . 26 21 ! .!,k,.._;:, iii4 ,. k . t ^.. 5 . •i5 ,tai, t v. l ♦� Aiiti Figure 18:Proposed Water Quality monitoring locations within and adjacent to the NRPA boundary 36 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 44 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rlrtnhor 7M d Archaeological Resources The Florida Division of Historical Resources Master Site File lists known archaeological sites within the Clam Bay NRPA boundary Three are located within laid mangrove forest habitat. Two of the sites /- Comment[KW1O]:See hartwell et al 1994 (CR476 and CR547)are located north of the Pass and south of Inner Clam Bay. The third site ,descriptions (CR576)is located south of the Pass and north of the Clam Pass Park boardwalk.The fourth site is located 999999 (beach—check the archeological service). Site CR476 is identified as a prehistoric campsite and shell midden possibly supporting the use of several cultures dating from 8500 B.C.to A.D. 1700. Sites CR547 and CR576 are identified as shell middens which were in use between 100 B.C.and A.D. 1700. Recreational Use The Clam Bay NRPA provides a variety of opportunities for recreation. The main creek system between the Pass and the Bays is a multi-use waterway which at times sees swimmers,waders, fishermen,boaters,canoers,kayakers,and paddleboarders all sharing the waterways and the Pass. Many Collier County residents and visitors enjoy the natural environment of the preserve. Recent stakeholder input,as well as prior reports,supports the use of the Clam Bay NRPA for low-impact recreation. It is important that all who participate in recreational activities within the system do no harm to the flora,fauna and water quality of the Clam Bay NRPA. Clam Bay's dense forest of mangroves limits walking in the preserve. Most walkers seeking to enjoy the rich natural environment of Clam Bay use the three boardwalks that cross the preserve and provide access to the beach. Residents and guests of Pelican Bay use the northern and middle boardwalks. The southernmost boardwalk is open to the public and accessed from the parking lot at the south end of the system. Trams are used on all three boardwalks to transport those choosing not to walk on the boardwalk to the beach. Fishing and swimming are popular pastimes. Fishing can be done from the boardwalks and canoes or by wading into the water. Swimming is usually confined to the beach areas,but some swimmers and waders,if conditions permit,venture into Clam Pass. Shell hunters,joggers and sunbathers are also familiar sights along the shoreline. Kayaks,canoes,and paddleboards are used by those wanting to enjoy the natural setting and serenity of Clam Bay's waterways.There is a public launching area for non-motorized vessels adjacent to the parking lot at the south end of Outer Clam Bay. There is also a launch area for canoes and kayaks for Pelican Bay residents on the northern boardwalk.The canoe/kayak trail is clearly designated by canoe trail markers from Outer Clam Bay to Upper Clam Bay. 37 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 45 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division flrtnhcr 7n1 d Instances of disagreements towards boaters from swimmers not understanding the mixed-use aspects of the waterway and potentially unsafe motorboat operation have been occasionally observed. Ongoing education will continue to indicate the mixed use-aspects of the waterway. If necessary, County Ordinances or other management measures will be sought to promote safe and environmentally suitable utilization by all residents and visitors. 4.0 Management Plan Goal and Supporting Objectives The following goal and supporting objectives for the management of the Clam Bay Natural Resource Protection Area(NRPA)were developed in accordance with the directives of the Collier County Board of Commissioners(BCC)and the Pelican Bay Services Division(PBSD),which serves as an advisory board to the BCC. The goal and supporting objectives were formed in conjunction with stakeholder input and are based on the management issues present in the NRPA as well as the purposes for which the land is held in public trust. The Clam Bay NRPA requires active management to ensure its long term health. The goal and supporting objectives set forth in this plan should not appreciably change over time,but management techniques and strategies may be modified to appropriately manage the NRPA. Annual reports documenting the results and analysis of all monitoring activities over the course of the previous year will be completed,and the results presented at one of the PBSD's announced monthly meetings. The ability to implement specific objectives of the management plan is dependent upon available administrative and financial support. Therefore,activities will require prioritization to remain within available funding. Management strategies will be reviewed annually and adapted as needed. GOAT, The goal of the Clam Bay NRPA Management Plan is to establish the basis for management activities that will be undertaken to protect the health of the Clam Bay NRPA estuary. Objectives to support this goal include: 1. Maintain and protect the native floral and faunal communities within the Clam Bay NRPA 2. Ensure the estuary has adequate tidal and freshwater flows to maintain ecological health within the Clam Bay NRPA 3. Monitor and maintain water quality within the Clam Bay NRPA 4. Monitor archaeological sites within the Clam Bay NRPA 5. Ensure recreational activities are environmentally compatible within the Clam Bay NRPA These objectives were formed to allow for adaptive management,whereby the compilation and analysis of all data will occur holistically and provide direction to adjust strategies to better achieve the goal (Flowchart 1). 38 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 46 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rlrtnhnr•)naa INSERT FLOWCHART 1 DELINEATING GOAL in RELATION TO THE OBJECTIVES 39 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 47 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division Ortnhe r 7n1 Objective 1—Maintain and protect the native floral and faunal communities within the Clam Bay NRPA This objective is focused at ensuring natural resource protection and long-term sustainability by incorporating, evaluating and prioritizing all relevant information about the estuary into a cohesive management strategy that allows for recreational activities within its boundaries,while protecting the long-term health of the ecosystem and its natural and historical resources. The purpose of regular monitoring is to evaluate floral and faunal population levels on a comprehensive long-term basis with less emphasis on short term or seasonal changes. A. Maintain healthy,native floral and faunal populations. • Establish plots and photo points in Scrub and Hammock habitats and monitor periodically. • Monitor established plots in the mangroves periodically. • Monitor established transects in the seagrasses periodically. • Periodically determine estimates of wildlife populations within the IRPAI. Comment[Kw11]:No sense in a list as this will • Monitor benthic organisms eriodicall not give you the information you need to estimate g periodically. population which is what you need to determine whether the species is declining or increasing in the Reports will be prepared that detail monitoring results,perform data assessment;compare results to area(i.e.waste of money). baseline(if known and establish baseline if not known),and detail implications to management to determine whether or not Objective 1 is being maintained.If not,develop and implement a plan to return the ecosystem to baseline conditions(if possible). B. Protect Listed Species. • Identify and determine status of listed floral&faunal species and associated habitat types. • Identify vulnerable resources located in sensitive or recreational areas in association with disturbance events. • Locate and monitor gopher tortoise burrows periodically. • Update educational information on species,including species lists and the Clam Bay Guide,as needed Reports will be prepared that compile listed species data,their current and historical status(if known), population trends(if known),any potential threats to the population,and number of reported incidents of wildlife harassment or habitat destruction.Determine whether or not listed species are being adequately protected.If not,develop,initiate and enact(if possible)a plan that provides management recommendations to ensure the long-term survival and health of listed species within the NRPA. C. Remove Exotic and Nuisance Flora and Fauna. Locate and identify exotic,nonnative,and nuisance species. • Report Category I and II invasive exotic species and nuisance species to the responsible entity for removal,as needed. 40 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 48 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtr,her 7n1a Reports will include the status of exotics and nuisance species;acres removed;and track changes in type and extent.Additionally,any reports of exotic faunal species will be compiled to determine if any action is necessary.If action is required efforts will be made to control exotic fauna. D. Develop an integrated resource management strategy to interpret research results for implementing a conservation strategy(Funding dependant). INSERT FLOWCHARTS FOR OBJECTIVE 1 Objective 2—Ensure the estuary has adequate tidal and freshwater flows to maintain ecological health within the Clam Bay NRPA A. Identify the minimum tidal flow necessary to ensure a healthy ecosystem. Provide sufficient tidal exchange to maximize benefits while minimizing negative environmental impacts. • Conduct periodic bathymetric surveys of Clam Pass. • Conduct periodic analysis of tidal data. • Maintain tidal gauges. • Conduct bathymetric surveys of interconnecting waterways when needed. Determine through regular biological monitoring whether ecological health warrants intervention strategies Bathymetric surveys of cross-sectional areas of the Pass,tide gauge data,and ecosystem status will be used to indicate if dredging is needed.,Refer to Chapter 5.0,Hydrologic and Ecological Dredging Criteria Tables for determining when to dredge and Appendix 5 for information on hydrologic variables.) If dredging necessary to prevent ecological damage to the estuary and there is a high probability that the situation can not naturally rectify itself,then design and develop a dredging template that does not impact or have the potential to impact seagrass and seek appropriate federal and state permits to dredge Clam Pass and/or Cuts 1-3 if needed. INSERT FLOWCHART FOR Objective 2A B. Ensure appropriate freshwater inputs,freshwater,drainage,and tidal flushing. • Identify and determine appropriate freshwater inputs(quantity and quality)and timing necessary for long-term conservation of the natural biodiversity within the Clam Bay NRPA. • If surface and storm water evaluations determine that it is necessary to reduce the amount of stormwater entering the Clam Bay system then new or existing avenues to accomplish reduction will be implemented through BMP's or other alternative methods (funding permitting). 41 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 49 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhor 7n1d • Efforts will be made to improve the understanding of current freshwater inputs entering the Clam Bay NRPA in comparison to pre-development conditions and to develop strategies to reduce the amount of freshwater entering the Clam Bay system. INSERT FLOW CHART DELINEATING OBJECTIVE 2B • Conduct periodic monitoring of hand-dug channels. • Perform periodic maintenance of selected sections of hand-dug channels. Report status of hand-dug channels and water impoundment within the mangrove forest(if any)and develop intervention strategies if data document the need. Objective 3—Monitor and maintain water quality within the Clam Bay NRPA A. Develop a long-term water quality program that ensures a sustainable healthy environment for all users. Follow a program of water-quality data collection,addressing the site specific lalternativel criteria approved by FDEP. Comment[k12]:It might not be in your best • Sample monthlyfrom sites used to establish FDEP site specific alternative criteria. interest to lock yourselves into the nd t site specific P p creiteria when you just say fdep standards.as • Ensure sampling and testing protocols comply with FDEP guidelines and standards. standards change and may not be site specific Reports will summarize water quality data.Analysis will include a determination of whether or not water quality parameters are within State standards,trending analysis overtime,and implications to area ecology.Data will also be entered into the STORET database on an annual basis.In the event that water quality parameters are not in compliance with State standards,intervention strategies will be developed and initiated. B. Promote programs for controlling water pollution from point and nonpoint sources. • • Promote Best Management Practices for fertilizer and irrigation use in Pelican Bay. • • Promote programs to reduce algae levels in upland stormwater ponds in Pelican Bay. • • Promote programs to reduce additional copper input into stormwater ponds in Pelican Bay. • Eliminate and/or reduce the usage of copper algaecide to treat algal blooms in freshwater stormwater lakes whose water ends up within the Clam Bay estuary. • Investigate new methodologies for controlling water pollution Address the copper impairment determination within Clam Bay by determining how and to what degree water quality within the Clam Bay NRPA is influenced by land use practices for delivering storm or surface water into the Clam Bay system.Additionally,reduce pollutants entering the estuary through best 42 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 50 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division n�r„hor)ma management practices geared at reducing storm and surface water pollutant loads,and monitor results through water quality analysis.Report results of subsequent water quality analysis detailing whether or not there has been a measured reduction in copper and/or nutrient laden freshwater inputs.Evaluate the best management practices and track residential units who have initiated and maintained stormwater best management practices. INSERT FLOW CHART DELINEATING OBJECTIVE 3 Objective 4—Monitor archaeological sites within the Clam Bay NRPA A. Monitor conditions of known archaeological sites. • Review historical records of Florida Division of Historical Resources(DHR)on known archaeological sites. • Inspect known archaeological sites periodically. • Report findings as appropriate to DHR. B. Implement strategies for the protection of archaeological sites as needed. INSERT FLOWCHART OBJECTIVE 4 Objective 5—Ensure recreational activities are environmentally compatible within the Clam Bay NRPA A. Monitor access and the condition of the facilities for recreational uses. • Report vegetation needing to be trimmed to the responsible entity. Report litter needing to be removed to the responsible entity. • Report facilities needing to be repaired or replaced to the responsible entity. B. Maintain existing canoe trail. • Inspect signage periodically. • Repair or replace trail marker signage as needed. Repair or replace caution seagrass and shoaling signs as needed. • Revise and/or reprint the Canoe Trail Guide as needed. C. Maintain existing signage for safe swimmer and boater usage. • Inspect signage periodically. • Repair or replace signage as needed. D. Monitor use of facilities/area for recreational uses. • Encourage citizens to report unsafe or environmentally harmful use. • Coordinate with responsible entity to enforce the laws and regulations as needed. • Continue to support the use of the Clam Bay NRPA for low-impact recreational uses. 43 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 51 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division Ortnhor 7n1d E. Maintain materials to educate visitors about the unique features of the Clam Bay NRPA. • Inspect educational signage periodically. • Report signage needing repair or replacement to the responsible entity. • Update Clam Bay Guide as needed. INSERT FLOWCHART OBJECTIVE 5 44 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 52 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division flrtnhor 7nia The goal and all objectives will be evaluated annually in conjunction with all past and present research and monitoring programs conducted within the NRPA to determine ecosystem status.If progress in achieving objectives is not favorable then the methods detailed within this section will be re-evaluated and updated as needed using new methodologies if warranted to achieve progress in meeting the goal of maintaining the health of the Clam Bay ecosystem. 5.0 Clam Pass Dredging A. Dredging Policy There are two circumstances that could necessitate dredging Clam Pass. 1. Clam Pass closes completely due to a storm or natural event or is in eminent danger of immediate closure following a weather driven event and such conditions are decided by qualified professionals to be uncorrectable through the dynamics of natural hydrological and meteorological processes. In this situation the inlet should be dredged as soon as possible. 2. The inlet has lost hydraulic efficiency and is jeopardizing the health of floral and faunal communities of the Clam Bay NRPA. This determination is made by reviewing and comparing current and past data from tidal hydraulic,bathymetric and ecological monitoring data. In both cases the PBSD Board would,after consultation with and advice from qualified coastal engineers and biologists,approve and recommend an appropriate set of construction drawings for the dredging event to the BCC for its approval prior to the submittal to the regulatory agencies. Dredging will only be done for the health of the Clam Bay NRPA,not for navigation or beach renourishment. The extent of dredging will be limited to only that needed to maintain the health of the estuary.Beach-compatible sand removed as part of the dredging event will be spread on adjacent area beaches. B. Dredging Criteria The purpose of regular monitoring is to evaluate inlet characteristics on a comprehensive long term basis with less emphasis on short term or seasonal changes. To monitor the stability of Clam Pass,and its effect on the ecology,data on the variables listed below will be regularly collected. They will be reviewed by the qualified engineers and biologists. If data are not within the identified target ranges for the variables,further monitoring and/or intervention will be considered in conjunction with the overall health of the flora and fauna within the Clam Bay NRPA. Further information regarding dredging criteria is presented in Appendix 5 and Flowchart 3. 1. Bay Tide Range 45 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 53 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rlrinhor 7M Tidal range data have been collected annually since 1999 and will continue to be collected and reported to the consulting engineer at least quarterly. An annual tidal analysis report will be included with the annual report. Data are collected from gauges at four locations(Clam Pass Park Boardwalk,Pelican Bay South Boardwalk,Pelican Bay North Boardwalk,and Upper Clam Bay). These gauges provide a record of the tidal range within Clam Bay and are one indication of the tidal prism or volume of water flowing through Clam Pass at each tidal cycle. Based on an analysis of data from the gauges at the South Boardwalk and Clam Pass Park Boardwalk from 1998 to the present when the inlet was hydraulically stable,the ratio between Clam Bay and Gulf tide was between 0.6 and 0.7 over 90%of the time. Therefore,if the ratio between Clam Bay and the Gulf tide falls below 0.6,but above 0.5,further monitoring will be considered once it has been established that other types of blockage are not causing the problem. If the tidal range ratio falls below 0.5,physical monitoring of,or interventions to,potential shoaling areas that could be impeding flow will be considered. 2. Cross Section of Flow Area and'Volume of Shoaled Material / Comment[k13]:Question Humiston and Moore on this issue as has ecological considerations ;Annual bathymetric surveys and reports were completed from 1999 to 2008. Bathymetric surveys provide data on the physical conditions of the inlet channel,ebb shoal and flood shoal. Post-dredging bathymetric surveys and reports were completed at 3-month,6-month,and 12-month intervals following the opening of Clam Pass in April 2013. Beginning in 2014,bathymetric surveys and reports will be issued at least annually. Additional surveys will be considered if the hydraulic efficiency falls below target levels. To establish benchmarks or targets for flow area and volume of shoaled materials,the data analysis included evaluation of the flow cross-section areas in the three main sections of the dredging region. Section A represents the inlet channel,Section B the seaward part of the flood shoal,and Section C the bay side part of the flood shoal. l 46 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 54 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhor 7n1d y Section C 4t. �F E Y Section A t Figure 19:Sections A,B and C of Clam Pass The analysis included evaluation of the cross-section of flow between mean high water and the volume of sand within each segment. The cross-section of flow was computed at each survey station spaced approximately 50 feet apart. The average and minimum cross-section areas were used as indicators of 47 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 55 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (trtnhor 7n1 the physical condition of the flow area of the three segments. The cross-sections were compared to the design cross-section area of the 2013 dredging and the inlet conditions in 2004 and 2008 when inlet conditions were near equilibrium 24 months and 16 months,respectively,following dredging events. cross-section of flow areas:' `= : =r than 300 sq.ft. greater than 450 sq.ft. greater than 450 sq.ft. NOM&minimum cross-section llowigaN Section A greater than 250 sq.ft. Section B greater than 350 sq.ft. n C greater than 350 sq.ft. Pgets for volume of shoaled materials: Section A less than 3000 cu.yds. : ,., It +,... Comment[k14]:Check with Hummiston and Moore as these figures seem to be a mhw when permits usually as for mlw also the shoaled material Therefore,if the average cross-section of flow area falls below these numbers or the volume of shoaled volume and other figures are they max?not avg?and material exceeds these numbers,further monitorin or intervention ma be needed. these figures lead to excess Sand removal g y which is not too the benefit of the estuary. 3. Inlet Channel!Length! - Comment(k151:All levels and amounts in the entire hydrologic section need to be compared to past dredging to make sure the limits are not larger. The channel length is an important factor in inlet stability. A longer inlet channel will provide greater resistance to flow. Higher flow resistance will reduce the tidal range and increase the phase lag with the Gulf tide that reduces the tidal prism and flow through Clam Pass. To establish a benchmark for channel length a selection of aerial photos of Clam Pass from 2004 to 2013 was studied as well as data on the approximate length of the channel following dredging events in 2002,2007,and 2013. Based on this analysis,the benchmark for inlet channel is to stay under 400 feet in length. Inlet channel length will be recorded at least annually and included in the annual report. 4. Ebb Shoal The size and shape of the ebb shoal is a key factor to the stability of the inlet that,in turn,supports the stability of Clam Pass. The ebb shoal helps to keep the inlet open when facing storms and big wave events. The ebb shoal provides sheltering to the channel and a sand bypass pathway around the inlet without filling in the Pass. The shape and volume of the ebb shoal are additional indicators of the stability of the inlet. Critical conditions include onshore collapse of the ebb shoal that can be indicated by significant change in ebb shoal offshore distance,volume,and increase in dry beach areas adjacent to the inlet. 48 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 56 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rlrtnhar)n1d To determine a target for the ebb shoal delta,data from April 2013 to April 2014 were reviewed. The ebb shoal position offshore is measured from a line connecting the north and south channel banks at mean high water out to the-4.0 foot contour line. The recommended length of the seaward extent of the ebb shoal is at least than 250 feet. The ebb shoal distance from shore will be recorded at least annually and included in the annual report. 5. Ecology A critical consideration in all dredging decisions is to ensure the ecological health of the Clam Bay NRPA.This will be determined through periodic monitoring of flora and fauna of the NRPA system, including mangroves,benthic communities(including seagrass),and other important species such as fish and birds(as funding permits).Any indication of decline in ecological health and/or population levels will be investigated to determine cause,if possible,and to determine whether or not dredging should be considered as a possible solution. The pros and cons of dredging will be weighed in regards to both hydrologic and ecological consequences.A summary of criteria for dredging are presented in the tables below. Hydrologic Criteria Description Bay Tide Range Ratio Ratio comparison of the interior and Gulf tidal ranges Cross Sectional Area Area in different locations of the Pass through which water can flow Volume of Shoaled Material Quantity of sand and sediments within channel that can restrict flow Inlet Channel Length Distance water must flow through the beach and ebb shoal areas Ebb Shoal Distance from shore to the outer ebb shoal limits Ecological Criteria Description Mangrove Forest Examination of whether or not there are indications that the forest is being stressed by the lack of tidal flushing Sea Grass Beds Determine the extent of beds and whether or not dredging will directly or indirectly impact them Floral and Faunal Determine if dredging could directly or indirectly negatively impact any floral or faunal components C. Dredging Construction 1. Typical Cross-Sections for Dredging Typical cross-sections for the suggested dredge design are provided below. When dredging is deemed necessary,the design cross-section area as stated in the design range,with consideration to existing conditions,will be followed. Minor modifications to this dredging template may be needed for future 49 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 57 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division ('rtnhor 7t11d permitting. Typical cross-sections are shown for o Oen areas in Sections B and C where the waterway is wider than the tap et et cross-section. ',„ 44 "° angrove In Sections B and _ .-- Comment[k16]:The 5 ft buffer was agreed to C where seagrasses may be present every effort will be made to avoid dredging activities that would be lust for al point of viewncy"dredge as from an ecological point of view this is too close to the harmful to seagrasses. mangroves as evidenced by the toss of trees and new seedlings in the area that was dredged within 5 feet this buffer needs to be increased to a minimum of 15 —20 ft. 2013 Target Proposed Dredged Area Design Area area Below 312 300 300 MHW • A e SECTION A —TYPICAL 6- „ cw.vn:a wets z 2— ..J -4H'f:1.3.35.) —2— S,NftOP[,VA —4— •444 mg+art(-9,r WO) maa mruis C-n.e•nav;t -e- s0 , -10- - NORTH SOUTH —12200 —1150 , —1100 —60 0 30 n 100 15 n 200 DISTANCE FROM CENTER(FEET) Figure 20:Typical maintenance dredging cross-section-Inlet Channel-Section A figure provided by Humiston& Moore) 50 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 58 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nrtnhar 7ma 2013 Target Proposed • Dredged Area Design • Area area Below 650 450 450 MHW " e SECTION B -TYPICAL a s 4- z 2_ I UMW if ODMS tN(^�,„r») -B- -IB- - NORTH SOUTH -1-200 -150 -100 -50 0 S0 ISO 150 200 DISTANCE FROM CENTER(FEET) Figure 21:Typical maintenance dredging cross-section—Semvard Flood Shoal—Section B(figure provided by Humiston &Moore) 51 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 59 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nrrnhor gni a Cubic yards 2013 Target Proposed Dredged Area Design Area area Below 530 450 450 MHW sd a SECTION C -TYPICAL 4- (40.531 ti 0^/- ^2^ r-2- scram In+Y 7 t -a -10- NORTH SOUTH 200 -150 -i00 6 S0 166 ilo 200 DISTANCE FROM CENTER(FEET) Figure 22:Typical maintenance dredging cross-section—Bayside Flood Shoal—Section C figure provided by Humiston& Moore) 52 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 60 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nrtnhor7nla 6.0 Authorized Construction Activities List of Permits for Work Undertaken to Date and Relevant Legal Framework FDEP and USACE 10-year permits will be sought in conjunction with this new Management Plan, after the application is approved by the PBSD and BCC. The permits will allow for ongoing maintenance activities to continue along with occasional removal of material by dredging within a discreet area of Clam Pass in order to maintain the existing tidal regime within the system. Any changes to the submitted dredging scope or other new management initiatives will be reviewed by the PBSD Board and Collier County Commissioners before seeking any additional permit(s)which may be necessary for the modified activities. Additional investigations which may be undertaken at a later date to look at,for example,faunal investigations,more in-depth water quality concerns,or other issues that may arise as a result of stakeholder discussions could also necessitate permitting which will have to be reviewed by the PBSD and BCC prior to any such permit applications being submitted. This Management Plan is specifically tasked to maintain the improvements and benefits already realized and to insure that the restoration success observed to date is continued. Dredging for navigation or beach renourishment will not be done. Appendix 1 contains the timeline of events within the Clam Bay system and a list of authorizations and brief details related to existing and historical permits issued for the Clam Bay system. 53 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 61 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division Ortnhcr 1111 a 7.0 Clam Bay NRPA Management Plan Amendments The Management Plan is not expected to be a static document,and ongoing research will be conducted and data collected related to water quality,hydrographic changes in the various areas of the system, benthic community health,mangrove community health,exotic and nuisance vegetation control,and public education. Conclusions,recommendations,or alternative management activities that come about as a result of studies conducted outside of the scope of this Management Plan will be examined and considered by the Pelican Bay Services Division and qualified engineers and biologists. Those modifications that are found to be pertinent and economically feasible alternatives or additions allowed under the scope of this Management Plan will be added to the Management Plan. • 54 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 62 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nftrh r',ma Clam Bay NRPA Management Plan Stakeholder Groups and Review Agencies Review Agencies City of Naples Collier County Natural Resources Michael R.Bauer,J.D.,Ph.D. Bill Lorenz 295 Riverside Circle 2800 N Horseshoe Dr Naples,FL 34102 Naples,FL 34104 Collier County Parks and Recreation Florida Dept.of Environmental Protection Maura Kraus/Barry Williams Megan Mills 15000 Livingston Rd P.O.Box 2549 Naples,FL 34109 Fort Myers,FL 33902 Florida Fish&Wildlife Conservation Comm. Florida Fish&Wildlife Conservation Comm. Habitat&Species Conservation Div. Boating&Waterways Section 3829 Tenoroc Mine Rd 620 South Meridian St Lakeland,FL 33805 Tallahassee,FL 32399 National Marine Fisheries Service South Florida Water Management District 263 13th Avenue S Laura Layman St.Petersburg,FL 33701 2301 McGregor Blvd Fort Myers,FL 33901 U.S.Army Corps of Engineers U.S.Fish and Wildlife Service Tunis McElwain 1339 20th Street 1520 royal Palm Square Blvd,Ste 10 Vero beach,FL 32960 Fort Myers,FL 33919 Stakeholder Groups/Individuals Collier County Audubon Conservancy of Southwest Florida 1020 8th Avenue S,Ste 2 1495 Smith Preserve Way Naples,FL 34102 Naples,FL 34102 Mangrove Action Group Naples Cay Association P.O.Box 770404 40 Seagate Dr,Ste 1206 Naples,FL 34107 Naples,FL 34103 Paradise Coast Paddlers Club Pelican Bay Foundation 2392 Clipper Way 6251 Pelican Bay Blvd Naples,FL 34104 Naples,FL 34108 Pelican Bay Property Owners Association Seagate Property Owners Association 801 Laurel Oak Dr,Ste 600 P.O.Box 3093 Naples,FL 34108 Naples,FL 34106-3093 Sierra Club—Calusa Group Southwest Florida Paddling Club 6075 Pelican Bay Blvd,#703 20991 S Tamiami Trail Naples,FL 34108 Estero,FL 33928-2838 55 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 63 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nrtnhor)nia Tall Tales Bait and Tackle The Ritz-Carlton Naples 841 Vanderbilt Beach Rd 280 Vanderbilt Beach Rd Naples,FL 34108 Naples,FL 34108 The Seasons at Naples Cay Condo.Assoc. Waldorf Astoria Naples 81 Seagate Dr,#3000 475 Seagate Dr, Naples,FL 34103 Naples,FL 34103 Diane Solomon Brown&Stuart Brown Sandra J Doyle dianesolomonbrown@me.com naplespatriots@comcast.net Anne Georger Brandon Lampe ageorgerl@gmail.com brandonlampe@rocketmail.com Diane Lustig&Leon Lustig Linda Roth lustigl@embargmail.com LOR3LOR3@aol.com Missy Travis&Pat Travis Mary McLean Johnson missy.travis@gmail.com 6573 Marissa Loop#1501 ptravis@delotte.com Naples,FL 34108 56 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 64 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhar-)n1 Clam Bay NRPA Management Plan'Bibliography! i--[Comment[KW17]:Renumber and format Benedict,M.A. 1984.Department of Natural Resources Collier County Part 4 Natural Resources Management Plan.Tech.Report NO.84-4.pp.6-9,69-80. Benedict,M.A. 1984.Department of Natural Resources Collier County Part 1 Natural Resources Management Plan.Tech.Report NO.84-1.pp.36 Coastal Zone Management Plan for Collier County Florida. 1991.Collier County Natural Resources Department.pp 279-294. Collier County Natural Resources Department.Clam Bay Natural Resources Protection Area Management Plan Draft,technical paper-4th rev.Nov 21, 1994. 2. Collier County.Executive Summary—Approval of Clam Bay Natural Resources Protection Area(NRPA).21 Feb 1995. 3. Crewz,David W., 1989,Clam Pass Park mangrove damage,Department of Natural Resources Interoffice Memorandum. 4. Crewz,David W.Florida.Department of Natural Resources.Clam Pass Mangrove Damage. Interoffice Memo,May 1989. 5. Department of Environmental Regulation, 1981,Diagnostic and Feasibility Study for Moorings Bay,Collier County,Florida. Devlin,D.J.,Gore,R.H.,and Proffitt,C.E. 1987.Natural Resources of Collier County.Preliminary Analysis of Seagrass and Benthic Infauna in Johnson and Clam Bays,Collier County Natural Resources Dept.CM 169. Technical Report No.87-2. 6. Gee&Jensen Engineers,Architects and Planners,Inc.,1978,Hydrographic Study Clam Bay System Collier County,Florida for Coral Ridge-Collier Properties Inc.,report. 7. Hartwell,Richard W.,Hatcher,James M.,Grabe,Stephen,August 1994,Clam Bay Natural Resources Protection Area(NRPA),Collier County Environmental Services Division,Publication Series NR-SP-94-01,technical paper. 8. Hawkins,Mary Ellen,Obley,Ross P.,"Pelican Bay-Visit and Revisit."Urban Land Vol.40,No 11.(December 1981)21-27. 9. Heald,Eric J.,Tabb,Durbin C.,Roessler,Martin A.,Beardsley,Gary L.,Ward,Gerlad M., Durrance,Dallas H.,Yeend,John S., 1978,Carbon Flows in Portions of the Clam Pass Estuarine System,Collier County,Florida,Tropical BioIndustries Company and Gee and Jenson,Engineers- Architects-Planners,Inc.,technical paper. 57 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 65 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhcr)m d 10.Heald,Eric J.,Roessler,Martin A.,December 1979,Invertebrate Population Studies in the Vicinity of Upper Clam Bay,Collier County,Florida,Tropical Biolndustries,technical paper. 11.Heald,Eric J.,July 1983,Populations of Melampus coffeus and Cerithidea scalariformis West of Upper Clam Bay,Collier County,Florida,Tropical Biolndustries,Inc.,technical paper. 12.Heald,Eric J.,July 1983,Fish Populations of Tidal Ponds West of Upper Clam Bay Collier County,Florida,Tropical Biolndustries,technical report. 13.Humiston and Moore Engineers.2007.Clam Pass Restoration and Management Plan Bathymetric Monitoring Report No. 8. 58 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 66 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rtnhcr.)(11 d 14.Humiston and Moore Engineers.2010.Clam Pass Restoration and Management Pla{i' Bathymetric Monitoring Report No. 12. 15.Humm,H.J.and Rehm,A.E. 1972.Ecological Appraisal an Ecological Study of the Clam Pass Complex.Study for the Collier Company at Clam Pass Properties.Tri-County Engineering, Inc.TCE Project No. 1516. 16.Lewis,Roy R.,and Marshall,Michael J. Lewis Environmental Services. First Annual Report, #2;One year after flushing channel construction. 1997. 17.Natural Resources Conservation Service.United States Department of Agriculture. Soil Survey of Collier County Area,Florida. 1998. 18.PBS&J,Inc.,Clam Bay System Data Collection and Analysis. October 2009. 19.Tackney&Associates,Inc.,Preliminary Hydrographic Assessment Clam Bay Systems. August 1996. 20.Tri-County Engineering,Inc., 1971,Tidal Datum Plane Determination for the Collier Company. 21.Tri-County Engineering,Inc., Sarkar,Chiranjib K.Hydrographic Investigation of the Clam Bay System,Technical paper.October 1972. 22.Tropical BioIndustries and Missimer and Associates,Inc.,A Comparative Study of the Water and Carbon Flows of Upper Clam Bay,technical paper.June 1979. 23.Turrell&Associates,Inc.Environmental Assessment Northwest Fill Area for Pelican Bay,technical paper.February 1979. 24.Turrell and Associates,Inc.and Humiston&Moore. "Clam Pass Inlet Management Plan Interim Report No. 1".July 1995. 25.Turrell,Hall&Associates,Inc.2009.Clam Bay Restoration and Management.Biological Monitoring Report.Eighth Annual Report No. 11. 26.Wilson,Miller,Barton&Peek,Inc.Pelican Bay Mangrove Investigation.Pelican Bav Water Management System-Stormwater Detention Volume and Water Budget Analyses.April 1996. 27.Worley,Kathy and Jeffrey R.Schmid."Clam Bay Natural Resource Protection Area (NRPA)Benthic Habitat Assessment-Report for the Contract Agreement Between Pelican 59 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 67 of 67 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division Bay Property Owners Association(PBPOA),Pelican Bay Foundation,Inc.(PBF),and the ^hor�m a Mangrove Action Group(MAG),and the Conservancy of Southwest Florida(CSWF).1Lt 2010. 60 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 1 of 108 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 APPENDIX 1 - TIMELINE OF IMPORTANT EVENTS WITHIN THE CLAM BAY NRPA AND A LIST OF PERMITS FOR WORK UNDERTAKEN IN AND AROUND THE CLAM BAY NRPA Al October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 2 of 108 Appendix 1—Timeline of Some of the Events within the Clam Bay NRPA and a List of Permits for Work Undertaken in and Around the Clam Bay NRPAI / comment pcwhl:Marsha Cravens Will provide later an edited list of events/permits that had effect on the system as I ran out of time to do this Timeline of Events Within the Clam Bay System 1920 A dirt road is built by Forest Walker running from the northeast to the south portion of Pelican Bay,a forerunner of US 41. 1952 Vanderbilt Beach Road is constructed,eventually severing connection with the Wiggins Pass system to the north. 1958 Construction of Seagate Drive is completed severing flow into and out of the mangrove swamps to the south. This area was subsequently dredged and excavated to become Venetian Bay. z• rw ,n1-1L-9 Vanderbilt L. A' aY Outer Clam Bay Upper Clam Bay diri=1 • Circa 1952 Aerial Photograph Circa 1960 Aerial Photograph Figure 2:Historic aerials 1972 Tri-County Engineering produces reports: • An Ecological Study of the Clam Pass Complex,published by Humm&Rehm • Hydrographic Investigation of the Clam Bay System Coral Ridge-Collier Properties,Inc.(a partnership between Westinghouse and Collier Properties)acquires the property and initiates development of Pelican Bay. 1974 Pelican Bay Improvement District(PBID)is formed to manage common property in Pelican Bay and provide for long- term sustainable infrastructure. 1976 Al-1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 3 of 108 Three,bi-directional 24-inch culverts are placed under Seagate Drive to provide hydrologic connection to Venetian Bay. The report`Environmental Assessment for Development Approval"is prepared for Pelican Bay. Clam Pass closes and is mechanically dredged by dragline to re-open the entrance;no records of quantities or dredge limits are available. 1977 Pelican Bay PUD is approved,and construction commences. 1977-1978 Gee&Jensen Hydrographic Engineers conduct a series of tidal studies within the system and distribute"A Hydrographic Study Clam Bay System"in 1978. 1978 Tropical Biolndustries produces a report:Carbon Flows in portions of the Clam Pass estuarine system. Ecological assessment work by Tropical Biolndustries for permitting of the northwest fill area notes a small area of stressed and dead mangroves close to Upper Clam Bay. 1979 An Environmental Assessment of the northwest fill area is distributed(Turrell,1979). Tropical BioIndustries produces biological reports: • A comparative study of the water and carbon flows of Upper Clam Bay • Invertebrate Population Studies in the vicinity of Upper Clam Bay 1981 Clam Pass closes and is mechanically dredged by dragline to re-open the entrance;no records of quantities or dredge limits are available. WCI,the developers of Pelican Bay,transfers title of Clam Bay to Collier County with the stipulation that Clam Bay shall remain a conservation/preservation area in perpetuity. 1982 WCI deeds Clam Pass Park and Clam Bay to Collier County,and in accordance with the Pelican Bay PUD,requires the County to seek approval of WCI or its successors for any modifications to Clam Bay. 1983 Tropical Biolndustries produces biological reports: • Fish populations of tidal ponds west of Clam Bay • Populations of Melampus coffeus(Coffee bean snail)and Cerithidea scalariformis(Ladder homsnail) west of upper Clam Bay. 1986 Collier County constructs a 2,900 foot boardwalk to provide access to the county park,south of Clam Pass. Al-2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 4 of 108 1988 Clam Pass closes twice,first in the spring and again in the late fall after Tropical Storm Keith(November 23, 1988). 1989 Small areas of stressed and dying mangroves are noted by residents in the basin west of Upper Clam Bay and east of The Strand in Bay Colony. A Department of Natural Resources(DNR)interdepartmental memo highlights the cause of the stress as"the lack of adequate water circulation resulting from the closure of Clam Pass". The first emergency dredging permit is received from DNR to re-open a clogged Clam Pass,following a memo by David Crewz to the DNR highlighting problems and danger if the Pass was not reopened. Clam Pass is mechanically dredged to re-open. Approximately 700 cubic yards of material are removed from the mouth of the inlet and the south bend of the channel. Material is placed south of the Pass. Multiple closures of the inlet occur during the construction process. 1990 PBID becomes a dependent district of Collier County called the PBSD. 1992 The area of dead mangroves is reported to be 7 acres. 1994 Twenty acres of mangroves are reported dead. 1995 Clam Bay is approved by the BCC as Collier County's first NRPA Clam Pass closes following a winter storm event. An emergency dredging permit is issued allowing for the opening of the Pass,but no work farther back than 600 feet. Mechanical dredging is undertaken removing approximately 5,000 cubic yards of material from the entrance of the pass. 1996 Clam Pass closes following a winter storm event. Permits to open Clam Pass are received from the Florida Department of Environmental Protection(FDEP),formerly DNR,and US Army Corps of Engineers(USACE). Mechanical dredging is carried out at the entrance of the Pass. Blasting and hand excavation to connect isolated waterbodies in Upper Clam Bay were permitted and completed in 1997. Mangrove die-off area is estimated to be 50 acres. 1997 Clam Pass,on the verge of closing following a winter storm event,is mechanically dredged again under modification to the 1996 Permits. Interior portions of the flood shoal are dredged to station 6+10. 1998 Al-3 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 5 of 108 Clam Pass is on the verge of closing again following a winter storm event. A mechanical maintenance dredging event is carried out under modification to the 1996 Permits. Interior portions of the flood shoal are dredged to station 6+10. Ten-year permits are received from FDEP and USACE for dredging Clam Pass and the interior channels,including adjustments to the Seagate culverts and installation of hand dug channels throughout the system. Associated monitoring work and storm and freshwater studies are required. 1999 Dredging work associated with the CBRMP is implemented in the spring by Ludlum Construction Company (managed by the PBSD). Hydraulic dredging of Cuts 1,2,3,and 4(Exhibits#'s??)are carried out. A 30 foot entrance cut is dredged. n 1 Ahl C' 1 ,. Lam'.. . A one way flap valve is installed on the Seagate culverts to allow flow from south to north. Staff at The Conservancy of Southwest Florida commences a 3-5 year study of the mangroves,surface water level and elevation within the mangrove die-off area. 2000 Hurricane Gordon impacts the area with no inlet closure. 2002 Hydraulic maintenance dredging of Clam Pass flood shoals between stations 3+10 and 17+50 by the PBSD is completed to improve tidal circulation(Exhibits#'s??). The entrance of the Pass is not dredged during this event. Flap valves on the Seagate culvert are removed due to insufficient head differential causing them to act as plugs instead of valves. Canoe trail markers are permitted and installed throughout the Clam Bay System. 2004 Hurricane Charley passes approximately 30 miles west of Clam Pass. A lot of sand is redistributed,but the Pass does not close. Extensive limb and leaf loss is documented within the mangrove forest. 2005 Al-4 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 6 of 108 Hurricane Wilma comes ashore about 30 miles south of Clam Pass. More limb and leaf loss is noted. The Pass does not close. Hurricane damaged mangroves along the bay in Same mangroves along the bay in 2007 2005 2007 Hydraulic maintenance dredging of the Pass and entrance channel is conducted between Stations 0+00 and 18+00 (Exhibits#'s??). The entrance to the Pass is dredged to an 80 foot width by Collier County Coastal Zone Management Dept. This dredging is conducted for sand for beach renourishment. 008 Tropical Storm Fay comes ashore about 30 miles south of Clam Pass. The area receives over 10 inches of rainfall. The Pass is not affected. 2009 The 1998 FDEP and USACE permits for maintenance of the Pass expire after 1-year extensions. 2010 Permits are issued to continue maintenance of hand-dug flushing channels throughout the system. 2011 White mangrove die-off is observed in the central portion of the system and is found to be caused by a bark beetle infestation of trees that had suffered cold temperature stress. A Benthic Habitat Assessment study is completed within the Clam Bay NRPA by the Conservancy of Southwest Florida. The study provides comprehensive mapping of benthic habitat compositions and distribution throughout the Clam Bay NRPA. 2012 Canoe trail markers and informational signage are permitted and installed throughout Clam Bay. The mouth of Clam Pass moves to the north near the Pelican Bay Beach Store. The northern shoreline of the Pass is temporarily reinforced with the installation of concrete barriers. Impacts from tropical storms Debby and Isaac,along with numerous winter storm fronts,cause the closure of the Pass. Al-5 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 7 of 108 2013 A single event mechanical dredge permit is acquired from the FDEP and USACE. The entrance cut is 45 feet,and the Pass is dredged between Station 0+00 and 10+00,limited by permit and equipment constraints. Beach- compatible material is placed north and south of the Pass above the mean high water line. Due to weather events the Pass is required to be opened again one week later. Development of a new Management Plan is initiated through stakeholder input and multiple public meetings. Timeline Specific to the Establishment of the Clam Bay NRPA 1976 Collier County Ordinance 76-30 zoned coastal areas environmentally sensitive lands as ST(Sensitive Treatment). 1977 Approval of the Pelican Bay PUD(Ordinance 77-18)by Collier County. The PUD identifies 98 acres of coastal mangrove wetlands to be filled in for development while preserving 570 acres of ST lands as the Pelican Bay Conservation Area(35 acres in the south and 5 acres in the north would become parks providing public beach access). 1981-82 Department of the Army Permit(79K-0282)authorizes the fill of the 78 acres of coastal wetlands(76 acres for residential development and 2 acres for public parking area). It requires 570 acres,including Upper,Inner,and Outer Clam Bays,and their adjacent wetlands to be conveyed to Collier County and to remain a conservation/preservation area in perpetuity for the use of the public. It also prohibites dredging Clam Pass except to keep it open to the Gulf of Mexico. 1988 The Pelican Bay Conservation Area(570 acres)is approved and recorded as FL-64P by Congress and becomes part of the Federal Coastal Barrier Resources System(CBRS). 1995 The BCC approves the County Natural Resources Department's recommendation to establish the County's first NRPA,stipulating that it would have the same boundaries as the Pelican Bay Conservation Area within the Pelican Bay PUD. The Collier County Manatee Protection Plan is approved. It contains the recommendation to establish an"Idle Speed/No Wake"zone throughout the Clam Bay/Clam Pass System. 1996 Collier County Ordinance 96-16:"The Clam Bay System Water Safety and Vessel Control Ordinance"is approved.It establishes that the Clam Bay System is an"Idle Speed/No Wake"zone. 1998 The CBRMP is developed,implemented,and managed by the PBSD and their consultants. FL Admin.Court Case No,98-0324GM provided an interpretation that certain elements of the Collier County Growth Management Plan(Conservation and Coastal Management Element)require protection of habitats within NRPAs which support existing and potential uses by wildlife. 2008 Al-6 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 8 of 108 Public Law 110-419 is adopted identifying the CBRS,Clam Pass Unit,FL-64P to be entirely located within the existing boundaries of the Clam Bay NRPA. 2013 Work begins on new Clam Bay NRPA Management Plan under the PBSD direction. List of Permits for Work Undertaken in and around the Clam Bay NRPA Eighteen years ago,Collier County processed a permit to dredge limited areas of Clam Pass to facilitate the movement of tidal water in and out of Clam Bay. The FDEP permit for this activity was issued on March 28,1996 with the companion USACE permit being issued on April 2, 1996. The FDEP permit was modified on April 10, 1996 with the authorized work being undertaken and completed on April 17, 1996. The practical effect of implementing this Permit was to reopen the Pass,but it was clear that without a more comprehensive strategy,this effort,standing alone,would not revitalize the Clam Bay ecosystem. A permit to improve the channel flow within defined areas of the Clam Bay system by a combination of blasting and hand excavation was issued on June 26, 1996. The work was undertaken and completed in two segments. The first channels were opened in August 1996,and the second channels were opened in November 1996. The results of these two initiatives were positive in that measurable improvements in tidal flow were discemible and with that have come improved conditions for natural re-vegetation. A permit was issued on January 5, 1997 to construct a portable pump and pipe system as an interim measure to divert impounded freshwater within the Clam Bay system to the Gulf while a more permanent solution contemplated by the construction of an outfall structure was reviewed. This plan was never implemented and is no longer being considered. It envisioned two pumps that would be operational when the water surface elevation within Clam Bay exceeded a specified threshold. The Management Plan anticipated the direct discharge of excess water into the Gulf with the expectation that this system would augment the natural discharge through the tidal mechanism after severe storm events. Subsequently,Collier County authorized the pursuit of a ten-year permit to allow the County,or its designee(which in this case was the Pelican Bay Services Division),to maintain Clam Pass in an open condition. The application, as filed,did not address any other issues affecting the operational characteristics of Clam Bay and essentially mirrored the 1996 Permit described in the first paragraph above. Agency comments and concerns which arose as part of the permit review led to the creation of the 1998 Clam Bay Restoration and Management Plan. The Management Plan addressed agency concerns at the time and included provisions for adding one-way flap gates to the Seagate culverts,dredging within three sections of the creek north of Clam Pass,a network of hand dug channels throughout the forest area,in addition to the dredging of the Pass.This permit was issued in 1998 and the Management Plan created in support of the permit has been the guiding document for the maintenance activities undertaken in the Clam Bay system since then. Al-7 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 9 of 108 Permit Details South Florida Water Management District Surface Water Permit No.: 11-00065-S Date of Issue:August 10, 1978 Expiration Date:Operational phase doesn't expire Project Description:To construct and operate water management systems 1 and 2 serving 539 acres of residential lands discharging by westerly sheet flow to Inner,Outer,and Upper Clans Bays. Department of Environmental Regulation Construction Permit/Certification No.: 11-50-3769 Date of Issue:May 23,1979 Expiration Date:May 15,1984 Project Description:To provide construction sites for residential development in a planned community by:placing approximately 700,000 cy of clean upland fill material onto approximately 94 plus acres of submerged lands of waters of the state landward of the line of mean high water. Department of the Army Corps of Engineers Permit No.:00754929 Date of Issue:November 18, 1981 Expiration Date:November 18, 1984 Project Description:This permitted the filling of 75±acres of mangrove wetlands north,east,and west of Upper Clam Bay and south of Vanderbilt Beach Road. Department of Environmental Regulation Modification Permit No.: 11-50-3769 Date of Issue:December 23, 1981 Expiration Date:November 18, 1986 Project Description:This modification extended the expiration date of the permit to November 18, 1986. Department of the Army Corps of Engineers Permit No.:79K-0282 Date of Issue:August 2,1983 Expiration Date:November 18, 1986 Project Description:This was an extension of the permit authorizing the filling of 75±acres of mangrove wetlands north,east,and west of Upper Clam Bay and south of Vanderbilt Beach Road,plus approximately 2 acres of mangroves at the existing Collier County beach access at Vanderbilt Beach Road. The request was reviewed,and no objections were raised to the proposed work schedule;therefore,the completion date of the permit was extended for 2 years until November 18, 1986. South Florida Water Management Plan Modification of Surface Water Management Permit No.: 11-00065-S Date of Issue:December 15, 1983 Expiration Date:Operational phase doesn't expire Project Description:Approved modifications to 1.)Revise system V,drainage area 3;2.)Construction and operation of water management system number VI. Department of Environmental Regulation Permit/Certification No.: 110974055 Date of Issue:September 12, 1985 Expiration Date:September 11,1987 Project Description:To construct approximately 2900 linear feet of 10'wide public access elevated boardwalk and pier with a 6'wide navigation access lift gate in Outer Clans Bay. Department of the Army Corps of Engineers Permit No.:861PT-20328 Date of Issue:December 18,1986 Expiration Date:December 18, 1991 Project Description:Discharge±2.3 acres of clean fill to construct an access road. Al-8 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 10 of 108 Department of Environmental Regulation Modification Permit.: 11-50-3769 Date of Issue:January 7,1987 Expiration Date:December 18, 1991 Project Description: This permit modification extended the expiration date and reduced the amount of fill in the area extending south along the coastal edge from approximately 13 acres, as permitted,to 2.43 acres in order to construct a linear access road(for The Strand in Bay Colony). Department of Environmental Protection Permit/Certification No.: 112659015 Date of Issue:March 14, 1995 Expiration Date:March 14,2000 Project Description:Re-establish the connection between the Gulf of Mexico to the Clam Bay system,by dredging from the mouth of Clam Pass and spoiling the sand over an upland beach site. Collier County Ordinance No.:96-16 Date of Issue:April 9,1996 Expiration Date:n/a Project Description:To impose idle speed/no wake zones in the Clam Bay system. Department of Environmental Protection Permit/Authorization No.:0128463-001-JC Date of Issue:July 6, 1998 Expiration Date:July 6,2008 Project Description:This Permit authorized activities to improve the hydrodynamics of,and thus restore and manage,the Clam Bay ecosystem. Department of the Army Corps of Engineers Permit No.: 199602789(IP-CC) Date of Issue:August 11, 1998 Expiration Date:July 8,2008 Project Description:This Permit authorized the following works: 1.)Replacement of Seagate Drive Culverts and installation of one-way check valves on the culverts(pages 45-50 of the CBRMP);2.)Clam Pass main channel dredging for Cuts 1,2,3 and 4(pages 49-65 of the CBRMP);3.)Excavation and maintenance of Interior Tidal Creeks(pages 65-71 of CBRMP). Department of Environmental Protection Permit Modification for Permit No.:0128463-001-JC Date of Issue:February 16, 1999 Expiration Date:July 6,2008 Project Description:Authorize minor revisions to the mangrove trimming procedures pursuant to site verification. Department of the Army Corps of Engineers Modification for Permit No.: 199602789(IP-CC) Date of Issue:February 26, 1999 Expiration Date:July 8,2008 Project Description:This application requested modification to: I.)discharge dredge material from Cut#1 to new disposal area identified as an upland parking area;2.)increase the width of channel cut#4;3.)remove native vegetation and excavate a portion of upland Disposal Site#2;4.)remove native vegetation and excavate a portion of upland Disposal Site#3. The proposed modification to widen channel Cut#4 is to be done without any additional seagrass impacts. Based on the review and coordination with Fish and Wildlife Service(FWS),the permit was modified in accordance with these requests. Al-9 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 11 of 108 Department of Environmental Protection Permit Modification for Permit No.:0128463-001-JC Date of Issue:May 19,1999 Expiration Date:May 28, 1999 Project Description:Re-grade beach fill material during the marine turtle nesting season to remove pockets of fine silty material and to remove an escarpment which may interfere with nesting marine turtles. Florida Fish and Wildlife Conservation Commission File No.:2003-0511-016BS for Permit No.:CO-016 Date of Issue:March 24,2000 Expiration Date:n/a Project Description:This Permit granted approval for placement of canoe trail markers in Clam Bay. Department of the Army Corps of Engineers for Permit No.:200001076(NW-EF) Date of Issue:April 13,2000 Expiration Date:February 11,2002 Project Description:Approved the installation of 32 waterway markers for a canoe trail in the Clam Bay System. Department of the Army Corps of Engineers modification for Permit no.: 199602789(IP-CC) Date of Issue:May 5,2000 Expiration Date:July 8,2008 Project Description:This application requested modifications to the monitoring and reporting schedule reference on page 93(Biological Monitoring)of DA Permit(CBRMP). The request was to submit annual reports instead of semi-annual reports. The permit was modified as requested. Department of Environmental Protection Permit No.:CO-732 Date of Issue:October 25,2002 Expiration Date:October 25,2003 Project Description:Perform dune and beach restoration,and plant salt-tolerant native dune vegetation in association with interim maintenance dredging event. Department of the Army Corps of Engineers Permit No.: 199602789(IP-CC)Extension Date of Issue:May 8,2008 Expiration Date:July 8,2009 Project Description:This Permit authorized the extension of the expiration date for a period of one year. Department of Environmental Protection Permit/Extension No.:0128463-001-JC Date of Issue:June 5,2008 Expiration Date:July 6,2009 Project Description:This modification extends the expiration date for a period of one year. Department of Environmental Protection Permit No.: 11-0128463-005 Date of Issue:December 17,2010 Expiration Date:December 17,2015 Project Description:Continue maintenance activities to the hand-dug channels and mangrove trimming in the Clam Bay system originally permitted under Permit No.0128463-001-JC. Department of the Army Corps of Engineers Permit No.: SAJ-1996-02789(IP-LAE) Date of Issue:February 8,2011 Expiration Date:February 8,2021 Project Description:Continue maintenance activities to the hand-dug channels and mangrove trimming in the Clam Bay system originally permitted under Permit No. 1996-02789(IP-CC) Al-10 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 12 of 108 Department of Environmental Protection Permit No.: 11-0295193-004 Date of Issue:November 2,2011 Expiration Date:November 2,2016 Project Description:Install 32 canoe trail markers and informational signage. Department of Environmental Protection Permit No.: 0296087-001-JC Date of Issue:August 14,2012 Expiration Date:August 14,2022 Project Description:Restore the alignment of Clam Pass to the previously approved location and conduct periodic maintenance dredging of a portion of Clam Pass in order to maintain tidal exchange between Clam Bay and the Gulf of Mexico. United States Fish and Wildlife Service Biological Opinion Activity Code No:41420-2010-CPA-0395 Date of Issue:February 22,2013 Expiration Date:n/a Project Description:FWS analysis of the potential effects of the dredging of the Pass on the threatened piping plover(Charadrias melodus),threatened loggerhead sea turtle(Caretta caretta),endangered hawksbill (Eretmochelys imbricate),leatherback(Derrnochelys coriacea),green(Chelonia mydas),and Kemp's ridley (Lepidochelys kempii)sea turtles,and the endangered West Indian Manatee Trichechus manatus). Department of the Army Corps of Engineers Permit No.: SAJ-1996-02789(NWP-WDD) Date of Issue:February 28,2013 Expiration Date:March 18,2017 Project Description:Dredging of Clam Pass and tidal creek to restore tidal exchange into Clam Bay. Department of Environmental Protection Permit Modification to Permit No.:0296087-002-JN Date of Issue:March 1,2013 Expiration Date:August 14,2022 Project Description:Modification of August 2012 permit to re-open Clam Pass by mechanical dredging of the Pass and flood shoal areas. Al-11 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 13 of 108 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 APPENDIX 2 - A RECENT HISTORY OF MANGROVE MANAGEMENT IN CLAM BAY A2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 14 of 108 Appendix 2 -Recent History of Mangrove Management in Clam Bay According to detailed field surveys performed in the early 1970's mangrove tree densities within the Clam Bay NRPA ranged from 726 to 7,580 per acre and maximum canopy height was estimated at 39 feet. Within the black mangrove dominated basin forest west of Upper Clam Bay, 16% of the black mangrove trees were reported as dead and others as severely stressed; evidenced by a high incidence of dead limbs on trees of all sizes(Tropical BioIndustries and Gee and Jenson, 1978). Humm&Rehm 1972 indicated that some mangrove areas near Upper Clam Bay were under stress. Oyster bars in the channel restrict tidal flow to the upper reaches of Inner Clam Bay except during high tide. Oyster bars between Inner and Outer CB restricted water flow to the extent that Upper and Inner Clam Bays were considered non-tidal. Humm &Rehm in 1972 concluded that productivity of the estuary was reduced due to low salinity preventing development of seagrasses,which in turn killed intertidal algae and consequently stressed the mangroves. Widespread grazing of mangrove roots by fish and radular snails in Upper Clam Bay resulted in the destruction of the mangroves by undercutting the shoreline and spread of disease. In 1976, salinities of 6.2 and 13.2 ppt were reported in north and middle Upper Clam Bay, respectively (Humm 1972), and as high as 27 ppt(80%of marine condition)in the northern end of the bay,a strong indication of Gulf influence on this part of the system in 1976 (Southwest Regional Planning Council 1976). In 1982, west of Upper Clam Bay intermittent ponds were connected by a series of man- made ditches in attempt to increase tidal flow. Subsequent studies indicated that fish populations increased in diversity,however tidal influence only extended to an area 150 feet from the pond margins(Heald 1983).The lagoon ponds of Outer,Inner and Upper Clam Bay are relatively viable,although evidence of slow deterioration in the mangroves around Inner Clam Bay has been documented for over twenty years (Heald et a1. 1978,Benedict, 1984). In 1984, the development of Pelican Bay was predicted to have adverse impact on the northern areas of this system since a large coastal bay mangrove forest is present along the margin of this area(Benedict, 1984). Dead and stressed mangroves were again reported in 1989 when David W. Crewz, a biologist with the Florida Marine Research Institute, was asked to inspect Clam Pass Park by Mary Ellen Hawkins, then a Collier County representative to the legislature (letter to Don Duden dated April 3, 1989). Mr. Crewz concluded that the "dead and stressed mangroves were caused by lack of adequate water circulation resulting from the closure of Clam Pass.... allowing toxin and salt buildup." Westinghouse Communities, Inc. employees in February 1992 noted additional mangrove die-offs north of Clam Pass Park on the west side of Upper Clam Bay. This area was inspected by Dr. Eric Heald, a consultant to WCI in April 1992. He hypothesized that the die-offs were probably due to hypersalinity, although 1991 was an above average rainfall year. The same conclusion was reached by Robin Lewis of Lewis Environmental Services, Inc., after an inspection in May 1994. At this A2-1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 15 of 108 time the die-off area was approximately 6 acres. After above average rainfall in the summer of 1995, The Conservancy of Southwest Florida, Inc.'s staff and residents in Pelican Bay reported additional mangrove deaths which continued through 1995 and 1996. The total area of the die-off through July 1999 was around 50 acres. The death of trees occurred around hyper saline ponds and is consistent with conditions caused by periods of excessive inundation of freshwater followed by periods of continuous dry down, particularly where the mechanism for flushing is impaired. (Lugo, et. al. 1976). During the period immediately preceding the observed die-off and after, Clam Bay received record amounts of rainfall. This rainfall, combined with an admittedly impaired circulation system, encroaching development of the Strand community to the west, and intermittent pass closure, resulted in water levels that were high enough for a long enough period of time to adversely impact the mangroves (CBRMP 1998). The die-off galvanized the Pelican Bay community into action. Dissatisfied with the response of county and state officials to the degradation of the mangroves, a group of residents formed a grass-roots campaign which led to the creation of the Mangrove A2-2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 16 of 108 Action Group (MAG). MAG lobbied the PBSD and WCI to undertake the restoration on their own and this collaboration eventually resulted in the creation of Clam Bay Restoration and Management Plan and the 10-year permits which allowed the restoration activities to be undertaken. The Clam Bay Restoration and Management Plan was finalized in 1998 to address the mangrove die-off. In assessing a variety of alternatives to the restoration of Clam Bay, the original need was not so much to restore the system to a mangrove forest (although that remained the primary goal) as it was to stabilize and restore the system as a thriving natural resource. This was accomplished through the dredging of Clam Pass and portions of the interior channels within the system, as well as construction of a network of hand- dug flushing channels throughout the original die-off area and a few other areas that were exhibiting stress. It was recognized that with changes to naturally induced flushing rates and hydrological regimes the mangroves would likely adjust by altering zonation patterns,species compositions,rates of growth and mortality,etc.(CBRMP 1998). Summary of annual monitoring by Turrel Hall and Associates since the implementation of the CBRMP Provided below is a brief, annual summary of the overall health of the Clam Bay mangrove system. This recent history of the mangrove management spans from 1999 to 2013. These summaries include key events, such as major weather occurrences, flushing channel construction and maintenance, as well as documentation of areas of improvement and calculations of die-off acreages. 1222 An estimate of 42.67 acres of dead or stressed mangroves was provided by Turrell,Hall & Associates, Inc. consisting of the main basin area adjacent to The Strand and several, smaller, discrete areas possibly attributed to lightning strikes or where slight depressional areas allow ponding and salinity/oxygen stress. Little change was noted later in the summer at the time-zero survey although most mangrove plots showed significant standing water which could be a function of the dredging work as well as tides and rains around the survey time. A2-2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 17 of 108 The main die-off area(NW Clam Bay,adjacent to The Strand) 1999 A2-3 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 18 of 108 2000 A full year after the dredging work no dramatic changes were apparent. Some mangrove plots had declined while others appeared in slightly better health. Seedling recruitment was good throughout. Heavy rains in late 1999 were thought to have contributed to a dieback in groundcover noted by Lewis Environmental Services. No new mangrove die- offs or expansion of stressed areas were noted. Work planned for 2001 included the experimental Riley encasement method for mangrove propagules. ,,rt • - ,4 i r� dr Y ;1 r- gip Main die-off area 2000 \ I 7 k,v �- ` ,tf. t i '?i" / �'1d a ib 'JI.,,.,''V;,,,'''; , w 1‘-'''',,1 -r ,.' �i t•, ,, XI ;; u. �� n .r 3� nt, r �.. ( 1 ntA i. t C 1C Y l , � a.. s IR' 1 G � � ,,,;.0,1, V lF �4 r, / . 1 V' I'I:. { A, ,.'.. '''W,1%..%M`r t,, kl '� r 1'f 1 1+. # I , ^ 7 H •'4141.-<!*.,,, N 5 f 'kic: ':,..,� 1 y {{4iy Y 1'14 c; Y; t$i 1 a > t l.. kii d N Y r A Jrt ',' �y 4 tp< i r ft 4 "'i's� `Sam '�! ,- i �f Rt f 1Y r?I�a7..!.::'''., alJ""'' .IC fi, i,!1'a��V'� �..L '419 1 __"�}- ,t� it'A,.�.Ih ',,,..4,-,i Ga(M�t .y, ... Riley encasements and flushing cut A2-4 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 19 of 108 2001 Mapping of the die-off area was repeated and estimated to have increased in size, spreading to the north. It encompassed just under 50 acres. Additionally, a few new stressed areas were identified through aerial photographs. Individual plots showed some additional tree losses but consistent seedling recruitment. Channel construction in the main die-off area and close to Plot 7 is thought to have contributed to the recovery process underway and illustrated by extensive Batis and dramatic seedling recruitment. The observations generated sufficient concern amongst project managers in 2001 that a suggestion for additional flushing channel construction in the die off area was made. r w yt: �� E ,. �rr-4 ,,. ''40,4V•'•• yy�__ n tif;E F R "T'1. r� T� ai S D b Y Y ! .. f �r h.4 +t¢ y"i ads�,1a; ;t�"��5ak�-�ry.���,�.rt{. "'` r; M . Main die-off area 2001 A2-5 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 20 of 108 2002 Additional flushing channels were constructed in the die-off area during late 2001. The 2002 surveys show that these efforts appeared to have been successful with a reduction of 12 acres in the die-off area. Balls growth and seedling recruitment was good. The problem of exotic vegetation growth in many areas was highlighted, and two new diffuse areas of stressed trees were identified. The presence of standing water and bacterial mats suggested lack of flushing was responsible. The one-way culverts installed at Seagate, thought to have reduced tidal exchange in Outer Clam Bay, were removed in October to determine whether tidal exchange between Venetian Bay and Outer Clam Bay could be achieved without affecting Clam Pass. F � 22, � Main die-off area 2002 with notable re-growth A2-6 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 21 of 108 2003 Stressed areas identified in 2002 were revisited, and no changes were noted in 2003. One of the aerially depicted mangrove stress locations was found, upon groundtruthing, to be actually an infestation of exotic plant species. A reduction in the calculated die-off area to just over 17 acres total was significant. 14 acres in this main die-off region was now classified as recovering. fTir! M1si 'p+" T `y a ,ate ate"# ; a Main die-off area 2003 A2-7 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 22 of 108 2004 Die-off acreage was estimated at 18 acres total in 2004, with the addition of a new area adjacent to the Contessa condominium building in Bay Colony. Several new small lightning strike areas were noted throughout the system. Plot 7 continues to show the most dramatic change. Most exhibited slow change in existing tree number, some losses, some growth and size-class change,but consistent seedling recruitment. Storm events in 2004 (Charlie, Frances, Ivan, and Jeanne) had minimal effects with some leaf loss and limb breakage. Additional flushing channels were constructed during dry the season of this year. Water level monitors put in place last year were removed due to repeated equipment failures. z-;` ,y r Z w , � x ( `.4 y ;E;+ yy#,t. 7M , y S ,. ,� •y''r. s• .. ~ i u r A to,t_ r ,.. ail a ""�r�� ;s4 , L �'yt p 04. W. t . f,, . ^i -;:::SV. t 4..., r h, g r tr e. 1,t 9'' ,}r 0. y,tLy +;'°„sty 's.'' -Att.Si�. ,.,Yf s ,'*'P } a ve, Main die-off area 2004 A2-8 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 23 of 108 2005 Several stressed areas were noted to be recovering this year including the area adjacent to the Contessa building where a drainage channel was in need of maintenance and clearing, work which alleviated the problems. A new die-off area was identified near the County boardwalk and it is suggested that clogging of channels due to Hurricane Charley may be responsible. Total die-off acreage in 2005 is estimated at 24.7 acres. Plot 7 and Plot 8 continue to show significant re-growth. Hurricane Wilma in October of 2005 caused considerable leaf loss, limb breakage and leaf browning throughout Clam Bay. The constructed flushing channels alleviated extensive ponding that could have occurred, and the system weathered the storm well. Work completed in 2005 included the last component in flushing channel construction. In total,approximately 13 miles of hand-dug channels were installed since 1999. • Main die-off area 2005 A2- October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 24 of 108 2006 Stress damage from the 2005 hurricane season necessitated the need for a division of the classification system that was used to define the status of the mangroves in the system. Stressed mangrove zones were now classified as "die-off area"for mangroves stressed by some factor other than storm events or"area of concern"for mangroves stressed by storm events. It was estimated in 2006 that 23 acres of recovery, 12.3 acres of stressed areas of concern and 23.4 acres of die-off area were present. The total area of stressed mangroves were 74.7 acres. Since the last mangrove channels were dug in 2005 and dredging work continues when needed, most of the monitoring plots have shown improvements and there was a significant reduction of die-off in the original locale. • 1r Main die-off area 2006 A2- October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 25 of 108 2007 The storm damage of 2005 added a level of difficulty to subsequent classification of areas within the system. Extensive defoliation and falling of individual trees meant that areas that could be termed stressed by the flow issues thought to have been responsible for the original die-off in Clam Bay were in fact affected by the high winds and storm surge. Approximately 4.9 acres of formerly classified 'die off' area have been reclassified to `recovered' this year. Stressed areas of concern that are likely not related to storm damage totaled about 15 acres while areas of concern that we suspect are due to the storm events were estimated at about 25 acres. An additional 20 acres within the original die off area had not yet fully recovered and was also included in this category. A total of 10.6 acres of mangroves were still considered dead, a significant reduction from the original die-off of over 50 acres in the late 1990's. This brings the total aerial estimate of mangroves that are not at optimum health to be about 70 acres. s:. y Main die-off area 2007 A2- October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 26 of 108 Z(OS The 2008 monitoring report was the final report associated with the original 1998 restoration permits. Effects of the storms of 2005 still added a level of difficulty to the classification of areas within the system. While the defoliation associated with the storms had mostly recovered, falling debris affected several of the monitoring plots throughout the system. Approximately 35.4 acres of forest area have been removed from the die-off classification since the implementation of the project. Stressed areas of concern that may still be related to storm damage or other factors (such as ponding or drying) added up to about 7.1 acres. Areas throughout the system that have not yet fully recovered but that have flushing channels and have shown marked increases in mangrove recruitment and new growth have been removed from this category(approx.20 acres). A total of 7.3 acres of mangroves were still considered dead. This included three main areas: the initial die-off area east of the Strand where about 5.5 acres were still dead, the damage from a tornado in the extreme north of the system accounted for about 0.8 acres, and the Hurricane Charley damage that resulted in a tidal restriction just south of the Pass accounted for about 0.75 acres. Several lightening strikes and small discrete die-offs spread throughout the estuary made up the remainder of the die-off acreage. :MUM'rr..1111111mir I . • • East of the Strand Die-off area,2008 A2- October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 27 of 108 2010 Even though the permit requirement for monitoring reports ended with the expiration of the 1998 permits, the PBSD continued to monitor the mangrove health within Clam Bay and document the positive results within the mangrove forest. Exotic eradication activities were also continued to allow for natural regeneration of mangroves observed elsewhere in the system. Construction of the last component of the flushing channels was completed in the 2005- 06 season. Inspection of these flushing cuts this year showed that they were still operating as designed and contributed to the continued growth of new mangroves within the system. Stress in mangrove forest areas was still apparent, although in several areas this may have been attributable to storm damage or to frost damage brought about by a couple of very cold temperature nights. The spectacular recruitment of white mangrove seedlings(8 to 10 feet tall saplings) throughout the original die-off area is testament to the efforts undertaken with the initial dredging. That work was considered a success. t X4b '1 • .. ,.� _ate. _ Main die-off area 2010 A2- October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 28 of 108 2011 -2012 An infestation of boring beetles was discovered in the early months of 2011.Observations within the system and research into the life habits of many boring beetles led to the conclusion that white mangroves stressed by sustained cold temperatures in December 2010 and January 2011 were most susceptible to the beetle attack. Cold stress reduced the abilities of these trees to fight off the boring activities and many trees succumbed to them. Yellowing leaves, leaf drop, and eventual death of the tree was the result. The dead trees were easily visible in the rooftop photos taken periodically from the Grosvenor and Montenero condominiums. Efforts to hatch beetle larva led to the identification of at least two species,a round-headed(Longhorned beetles)and a flat-headed borer(Metallic beetles). No further loss of trees was documented after 2012 as a result of the borers. I.;' Borer damage to stressed tree A2- October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 29 of 108 The lack of harsh weather, hurricanes or freezing temperatures over the past year seemed to have allowed the areas impacted by the boring beetles to begin to recover. A total of 4.02 acres of mangroves are still considered dead or stressed, a significant reduction from the original die-off of over 50 acres in the late 1990's. Typical flushing channel maintenance was conducted to ensure that the channels were operating as designed and continue contributing to the growth of new mangroves within the system. x3§ S +5 1 _.__..i• •. a'_a` ,t.. . nom• .``,\ u Main die-off area 2013 Summary of annual monitoring by Conservancy of SIVEL 1999-2013 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 30 of 108 i - r " ' Ii 4.1', In 1999,a total of twelve plots were , r . ta ►�.+ established throughout the Clam t '�S?.j 6;L t�r 1 t , e..0 �- ;r ta'ti , i ` Bay system, in areas that provided •-. ,°.`e �, .,- diversity in terms of substrate, a� ty71, '. a 1 - �} hydrology, s ecies topographyand i1,. r1 rte * P �'. ''al - ttw ,;.s'df tree condition (dead, stressed or ay y ,�k „� w l'Io:,-' alive) and are being monitored 10 ', �r:rr� "�� annually. A gradsect stratified F' .r't,71 random sampling regime was 11,e. ," r Lk'."""1 i employed to establish the 12 plots >l: 3 its in the spring of 1999. ,I .0„ . 4,,,...„,..:,, Plots 2,3, 6 and 11 were located in `yet .; , 0 {„ ' mangrove die-off areas.Plots 5,8,9 and 12 were in stressed::,I-,-s. `� areas. Plots 1, 4, 7 and 10 were , . �=��� ,, .��� ,. .t�' located in mangrove areas that were :0 e•P' ' s relatively healthy. .a a • Three out of the 4 plots originally } E, ,,"^ *....-h41)1,3i located in die-off areas,had signs of ' ,* • , ,; . recovery following restoration and , ' _ '-e '`.'c !J.,'" - have been reclassified as stressed. 41 Clam Bay Plot Locations ` These three plots began showing signs of recovery within five years '' - of Collier County's restoration project. Forest recovery in these emerging mangrove areas was only setback slightly by natural disturbances, as the storms had less effect on young supple trees present in these plots. Only one plot which started off classified as a die-off, still remains in a relatively similar state 14 years later. In the 1980's, Plot 2 was a very old mature black mangrove forest and by 1995 was completely wiped out.Plot 2 initially showed signs of recovery but had a setback in 1999- 2000,when 237 of the 238 white and red mangrove seedlings died.The County responded by installing hand-dug channels in the area to drain off standing water and by 2003 mangrove seedling recruitment into the area commenced again.Plot 2 has shown significant improvement as a result of restoration activities. Freshwater impoundment has decreased and the plot gradually filled up with white mangroves. Numbers have peaked and then receded as competition for resources ensued. Today this plot is showing the beginnings of a shift in mangrove species as more red and black mangroves have become established. Since the hand dug channels were put in to the west of plot 2 and the topography slopes downward to the east into this plot,there is a tendency for standing water to accumulate during heavy rains.The questions now are how saturated the soil will become,how heavy the rainfall and runoff is and how long it takes to recede. The answers to these questions will in play a significant role in whether or not this particular area will continue to recover. October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 31 of 108 Plot 3 2012 srd s,.1 !I, n - Plot 3 has shown the most significant P4,* ,'` f i improvement as a result of restoration and is an { to, 17c excellent example of a die-off due to development Fs: r x v . and altered hydrology whose demise can be reversed by abating flood water levels and ., -< retention periods. Plot 3 started off dead as a doornail in the spring of 1998 and within two years was flooded with white mangrove seedlings (over 2500 at one point), some of which are now • Ftrees and by 2003 was recruiting red mangrove • -: . • seedlings. Today, some red seedlings have attained tree status and are slowly outcompeting the young white mangrove trees over time. This plot exemplifies the process of mangrove regeneration with basal area and canopy cover steadily increasing overtime. First, the area was naturally seeded with white mangroves. White mangroves acted as a pioneer species invading the disturbed areas. Since white mangroves grow quickly,putting most of their energy into shooting upward(attaining tree height sometimes within 6 months),tons of recruits inhabited this plot appearing as a multitude of thin tall stems with a few leaves. The presence of so many white mangroves within a small area causes the individual trees and seedlings to show signs of stress, (approximately 60%as of 2003)due to competition for space and resources.The taller and healthier white mangroves quickly outcompete their siblings and recruitment drops and mortality increases. In 2003,this plot began to show the early signs of"succession"as red mangrove seedlings are becoming established in the area. Red mangroves grow much slower as they put the majority of their energy into their roots systems and then develop thick stems and a more bush like appearance and slowly inch their way up to treehood.The current status of an abundance of white trees and seedlings is perhaps paving the way for subsequent changes to a red mangrove dominated area and perhaps even overtime a reemergence of the original black mangrove forest that was present prior to the die-off. Plot 11, like plot 3, in the spring of 1999,was almost barren and overtime has successfully recruited both white mangrove seedlings and trees. Actual numbers in plot 11 were not as impressive as in plot 3 as forest recovery is occurring at a slower pace. Slowly white mangrove recruitment has shifted to red and black mangrove propagule recruitment.Heavy white mangrove mortality in 2006, due in part to Hurricane Wilma, lessened as seedling recruitment numbers leveled off.White mangroves are currently the dominant species. Plot 6 never got a chance to grow up; it is continually subjected to tidal surges, which naturally keeps this area in check. Dredging events tend to exacerbate mangrove washout as the tidal surge velocity often increases dramatically after a dredging event. More than 50% of the individual trees and seedlings are in a constant state of stress and this area remains unchanged,still classified as a die-off area. Plots 5, 8, 9 and 12 were initially classified as stressed areas prior to restoration and continue to be classified as stressed after 14 years post-restoration.Plot 5 remains in a state of arrested development.Tree mortality over the years is similar and successful recruitment of mangroves is very slow and consists primarily of red mangroves. In Plot 8 has regressed October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 32 of 108 ,t, ,, - to an earlier stage as mature red mangrove trees t4-i '�" ; ,,, , ;;"�? h 4„1,, ` died and recruitment shifted to primarily white kill, r •�.` , < it mangroves after Hurricane Wilma. The forest has t w . .F r � � ��, ,,,r. shifted from a more mature grove to a young k i',�� i�,,, ++ developing forest,reflected in lower average DBH ,.. and a young white mangrove dominated plot. �s ` ' In plot 9, basal area remained fairly consistent - . throughout the early periods of monitoring, .,;.< ae'F 4 �._ ': primarily due to the existence of a few mature r f -=�' Ploi ' black mangrove trees. Approximately 40% of the remaining trees showed visible signs of stress after 5 years of monitoring and some trees have actually been knocked over by nearby construction debris.Development pressure from the surrounding residential neighborhood contributed to the death of 17 trees. This plot suffered damage from Hurricane Wilma. As a result the canopy opened up and high white mangrove recruitment occurred.Plot 9 regressed to a younger stage of development evident in overall lower average DBH and the higher numbers of white mangrove trees becoming established in this plot. This plot also has high fresh water inflow as evident in the establishment of freshwater ferns within the area. Plot 12 2003 . - In plot 12, freshwater plants are fast replacing the * 't . , mangroves. Seedling recruitment is practically �.• • nonexistent and mangrove mortality is higher than I" , " recruitment rates. This plot is in a steady state of z,. ! decline reflected in the plethora of freshwater vegetation. This area is headed toward total mangrove depletion unless fresh water inflows are alleviated to stem the tide of freshwater immigrants. Plots 1, 4, 7 and 10, initially classified as relatively healthy have been downgraded to a stressed condition. Plot 1 was located within a very old mature black mangrove forest. Hurricane Wilma hit this area particularly hard as a tornado touched down in center of the plot devastating it. Since the hurricane, Plot 1 has been inundated and has not successfully shown signs of recovery. There has been a recent attempt at restoration to abate inundation in this area that will need to be evaluated overtime. :, t ' r + � , + Plot 4 was a relatively healthy red mangrove '''' i tYsi.r3 fir , j,;+', dominated area until 2001, when the trees ' . began to die of an infestation of Cytospora ri y. F •,� rhi=ophorae,which caused the death 40 of the `, ' "' ,..,i f 100 red mangrove trees in this plot. Cytospora H'L, rhi=ophorae is a fungus that attacks trees that y ♦, { ,t are already stressed. The outbreak in Plot 4 ,' 1 t 1 :r lasted for approximately 5 years and recovery I .; '..�_ has been slow. It was lucky that this fungus ,' `t did not spread throughout the Clam Bay October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 33 of 108 system as this could have been devastating to the mangroves if this infestation had run unchecked.Plot 7 during the early years of monitoring was a relatively healthy plot of black and red mangroves. There has been minimal mortality in this plot,but over time the canopy opened up, after Hurricane Wilma, allowing an influx of young red mangrove tress. This plot is only slightly stressed today and the canopy appears to be filling in over time. Plot 10 was a relatively healthy mature grove of • I k 4, K. black and red mangroves during the early years �, k � of this study. A channel was placed through this Rf, 4 Plot 10 to drain water out of a die-off area i .'kp.: .' 1 " 4. located to the west. Installation of the channel . . c•<tt h.ti,-4 ",.,2? damaged the root system of adjacent mature ' ' s mangroves. This caused the trees to fall over r` r ftduring Hurricane Wilma due to increased ' �• instability, since similar trees near this plot but 1 ;<: svYs ' with intact root systems easily weathered the Channel cut through Plot 10.Note prop storm.Today, Plot 10 is stressed and attempting roots have been severed during to recover as white seedlings and trees are being construction and a horizontal black recruited. d , The channels increased tidal flushing and , �, x�.w• Y_ y successfully removed a substantial amount of ' '`..,` '- :'�• , t ,. standing freshwater from the die-off areas. As �_r ?i ,`y\`.'sA + , i water levels subsided, the die-off areas were • again suitable for mangrove In the interim, ` • between the baseline assessment and 2013, ,, 'I'.:,1 '- several severe weather events including ti l 'M,' , Hurricane Wilma (2005), Tropical Storm Fay ,,, .,' ., (2008) and an extended cold snap(2010)caused s' ` additional damage to the mangroves. In Clam Bay,the larger more mature trees in plots 1,7,8,9, 10 and 12 were more impacted than the younger trees in plots 2, 3, 4, 5, 6, and 11. Since gaps in the canopy were created during Hurricane Wilma and Tropical Storm Fay it was expected that the maturity of the forest in that area would be forced to revert to an earlier stage, and cause a subsequent rise in mangrove recruitment. After the cold snap in the winter of 2010, some parts of the Clam Bay system became infested with boring beetles. The presence of wood boring beetles, (xylovores) are still of some concern. Some beetle species feed on only dead trees.However,other species feed on living trees and can become problematic if infected rates substantially increase and tree mortality rates increase as a result. Mortality caused by inundation is still of concern in the Clam Bay mangrove system,given its previous history of mangrove die-offs caused by altered hydrology.Given that since 2005 there has been an extended period of draught,vigilance will be necessary especially during summers with higher than average rainfall to make certain that the hydrology is not being October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 34 of 108 impeded. Overall, this mangrove system has improved in the sense that the die-off areas present in 1999 have been greatly diminished. However,weather events, disease and other stressors have impacted the mangroves as well. A number of plots that were relatively healthy in 1999 are now stressed in 2013 due to either natural or anthropogenic stressors. Mangrove trees can live for hundreds of years,yet it is evident that even in this short period of annual monitoring that many changes have occurred within the forest. Some of these changes have been favorable such as the restoration of the die-off area. Other changes have been unfavorable,such as increased tidal surges from dredging which caused some areas to be stressed or die. Therefore, it is critical to continue annual monitoring within this system to spot problems early,in hopes of curtailing large-scale die-offs in the future. A2- 15 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 35 of 108 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 APPENDIX 3 - A RECENT HISTORY OF SEAGRASS PRESENCE IN CLAM BAY A3 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 36 of 108 Appendix 3 -Recent History of Seagrass presence in Clam Bay Reports of field surveys from the early to mid 1970's document the presence of seagrasses within the Clam Bay NRPA but do not give any estimation of coverage or densities within the system. It is noted that seagrasses are present only in Outer Clam Bay, and there is some hypothesizing that the lack of seagrasses in Inner and Upper Clam Bays is the result of lower salinity levels and lack of water exchange with the Gulf. (Heald, 1972,Tropical Biolndustries and Gee and Jenson, 1978). The Collier County Department of Natural Resources produced an analysis of the seagrasses and benthic infauna in Clam Bay in 1987. In this report it is stated that a 15m x 15m plot encompassed most of the grass beds in Clam Bay. The seagrasses were described as monospecific shoal grass seagrass beds located on the east side of the waterway between the Pass and Outer Clam Bay, much in the same location of seagrass beds which exist today. A DNR memorandum produced by David Crewz in 1989 also mentions "some seagrass and algal beds" being present in Outer Clam Bay but again offers no information on location,aerial extent,or densities. The 1991 Collier County Seagrass Protection Plan states that "Outer Clam Bay contains one of the densest and most extensive seagrass beds in Collier County," though it does not quantify aerial extent or density within the report. The dominant species was turtle grass in contrast to shoal grass, which was reported as the dominant seagrass feature by Devlin et al.in 1987.This shift in dominant seagrass species could indicate that the flushing rates increased allowing turtle grass to dominate,since this species prefers clearer water and higher salinity than shoal grass (Coastal Zone Management Plan, 1991). An exhibit associated with the report shows the entirety of Outer Clam Bay from the Pass to the Seagate culverts as seagrasses(almost 60 acres). A 1994 report documenting conditions in the proposed Clam Bay Natural Resources Protection Area by the Collier County Environmental Services Division documented that seagrass coverage in Outer Clam Bay was approximately 10 acres. Based on anecdotal information and on comparisons with other seagrass areas in the County during the same time frame, it is not presumed probable that there was an estimated 80%decline in seagrass coverage during those three years. It is possible that the 1991 report may have over-estimated the coverage,however results were field verified (per.comm.Maura Kraus Collier County). In 2007,PBS&J conducted a seagrass assessment in Outer Clam Bay for the Collier County Coastal Zone Management Department. Of the 30 randomly selected sampling sites observed,seagrasses were found in 13 sites and consisted of a sprig of turtle grass and paddlegrass. . No conversion to an acreage estimate was made in this report. At the locations where seagrasses were observed,the estimated density relative to bottom coverage was between 5 and 25 percent. A3-1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 37 of 108 Annual Estimates of Seagrass Coverage since implementation of CBRMP A3-2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 38 of 108 The following annual summaries provide general observations of the presence of seagrasses within Outer Clam Bay since the implementation of the Clam Bay Restoration and Management Plan. . ,.w SEAGRASSES APPROX.10.09 AC. q� t, 4',..s ‘•4 -. y II • • y ' 1 5 i t�i[t ` a° _ syr J� ' , 1 ' T1'' :4 lo- a 41 iti......- ,r i' s'�. S ,'f � ! , ,. y s L fa Approximation of 1994 Seagrass Coverage A3-2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 39 of 108 1222 Prior to the initial dredging associated with the 1998 Clam Bay Restoration and Management Plan, seagrass acreage was estimated at 5.13 acres, and restricted to Outer Clam Bay and the channel leading to Clam Pass. A , „„,,, , , , ...,. = ! . ,. , , ., . . . t ...., .,...,..., r . 6.. , ,.. _ . Cfi' C• ,- - , 7 i 11,,1 ..414 45 , + %• 47.?",.t ` 4.i s.j;! 4.0.: i..._-2102, i _I_i% rs. d S?.nt + •_ ,..t'% Xi __ i. 1999 Seagrass Coverage 2000— 2004 Seagrasses show a slow decline during this time frame. Water quality testing within the system did not indicate chronic degradation. The decline was attributed to the increased tidal range caused by the dredging work, which results in longer exposure at low tides of the shallow areas where seagrasses were present. The one-way culverts installed at Seagate, thought to have reduced tidal exchange in Outer Clam Bay, were removed in October 2002 to determine whether tidal exchange between Venetian Bay and Outer Clam Bay could be achieved without affecting Clam Pass. Seagrass beds in the southernmost portion of Outer Clam Bay began to expand in 2003 after removal of flap gates. A3-3 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 40 of 108 2005 An increase in the seagrass coverage within the channel transects was documented. Increased density of the beds within the bay area east of Clam Pass was also noted. 2991 Shoal grass patches were still present in ecologically significant densities within the channel north of the County boardwalk and just inside Clam Pass mouth. Sea grass beds in Outer Clam Bay were still reduced compared to the 1999 pre-dredge conditions, but their steady improvement since 2004 seems to have continued into 2006. Approximately 3.6 acres of seagrasses were noted along the transects. ., ', S. 0', ESAPPROX.3.62 AC. „3 0{ y1.1" - M • • �[kRTa•�, - e.. ,.. t _......✓ — • y♦�` t ?+.• /e IT ''.:i�-'. , .4 ,.; . * `! K�� 7....,-,-L..,, i, „ii,,, . i. i 4k8i -{ Sed"j ! ` aY 3• l.',..I� i +.. '.\i '. �v �t`.�i`�A rw E j 1 �}i�j e. ! �5.i�{ ♦��.Y eJti+v '+F r. • r� ,�', ��+ ';'lt i `'k y 1 %try..; .t. 1 -�r ' u} l' i •^ ' r+ i• 1 ,,. tis' -147741. s - rot.-.�Yai.L!.. !`.i d.. if ., '. " - "'.•�h.� , 2006 Seagrass Coverage A3-4 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 41 of 108 2007 Concerns related to the seagrass coverage within the bay were raised by adjacent property owners this year, and Collier County contracted an additional study by Post, Buckley, Schuh, & Jernigan Inc. (PBS&J) to investigate seagrasses and nutrient inputs within the Clam Bay System,and Venetian Bay,Moorings Bay and the entire Doctors Pass area. Some of the results of the PBS&J study relevant to the Clam Bay System were: • Seagrasses were present within Outer Clam Bay. Paddle Grass (Halophila engelmannii) was observed at 13 of the 30 randomly generated points within Outer Clam Bay. • Residents' concerns that seagrass coverage had declined from 60+ acres to the present were unfounded as early estimates of 60+acres were likely erroneous. Nutrient and chlorophyll-a levels within Outer Clam Bay had increased over the past 20 years but were still below median values for Florida estuaries. As a result of these increased concerns regarding seagrasses, Turrell, Hall & Associates expanded the annual seagrass survey to cover the entire bay and not just the defined transects. Additional seagrass beds and macroalgae were observed in areas where they had not previously been documented. Though all of THA observations were of shoal grass, it was noted that all of the PBS&J observations were of paddle grass. It has been observed in the past that paddle grass is very ephemeral in this system and it is likely that the 2 months between the PBS&J and the THA surveys was enough time for the paddle grass to disappear. �i►4$ This was the final monitoring event of the seagrasses associated with the 1998 Clam Bay Restoration and Management Plan permits. Increases in seagrass coverage that were noted in 2007 continued through this year. A small area of paddle grass was observed along Transect #2 which had been devoid of grasses in the past. Other transect areas that have been devoid of grasses until this year include the western shoreline of the channel between Clam Pass and Outer Clam Bay (Transect 5). Seagrasses had been present along this area prior to the dredging but were replaced by black mangrove propagules when the increased tidal range led to extended drying times of the shoals where the grasses had been located. New grasses this year have been observed along the edges of the channel in areas that do not dry out so much during low tides. In addition to the seagrasses, other observation made along transects indicate that the biological diversity of the macro-invertebrate fauna within the system has increased. A3-5 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 42 of 108 Several mollusk species, including Florida horse conchs, southern hard clams, stiff pen shells,tulip snails,cockles,oysters,and several others were all observed. 2.411 The CSWF completed a benthic habitat assessment where seagrass species were only f found in Lower Clam Bay at 6.6% (n =28) a 41' of the sampling sites within Lower Clam ,"si' Mr: '"A" Bay. Shoal grass (Halodule beaudettei syn. clam '/ ' .t ,};• Pass " ' F i Halodule 1vr•ightii) was the principal component of the seagrass assemblage, was , , Lower a patchily distributed in the northern and beyt. '� southern areas of Lower Clam Bay, and was ' , �.�r f.°'. primarily collected on muddy sand and sand substrate.Paddle grass(Halophila decipiens) ! was collected at 1 site in the west-central """' portion of Lower Clam Bay on sandy mud r 1V1.rt substrate. Seagrass coverage was estimated - at 4.3 acres;however,this estimate should be * -'"4 ',^s +. 4',1,..i.-,, viewed cautiously given the patchy distribution and variable abundance within the 25 X 25 m sampling grids. an Seagrass coverage within Outer Clam Bay has continued to increase. The initial decline noted immediately following the 1999 dredging activities appears to have been reversed over the past 8 years. The decrease stabilized around 2004 and has reversed in the past few years to where the grass beds are re-establishing previous areas and new areas appropriate for the grasses (in terms of water depths and light penetration) are being colonized. Approximately 4.27 acres of seagrasses were noted within the system this year. Most of the seagrass observed was shoal grass though small patches of paddle grass and turtle grass were also observed. Future monitoring of the seagrasses will be conducted to see if this trend continues. SEAGRASSES APPROX.4.27 AC. i t 4 r r 1r P, , . . 'r , `1 1. I* -4,'`-',. ' F, . ,...- i. .:5 !.-• .• 5 , 1• _ ✓-• October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 43 of 108 2012 Seagrass Coverage A3-7 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 44 of 108 ZOLI Seagrass coverage overall totaled approximately 2.85 acres along the monitored transects within the Clam Bay system. The past thirteen years monitoring has shown that there was a decrease in the monitored seagrass beds immediately following the initial 1999 dredging activities. This decrease appears to have stabilized around 2004 or 2005. It has reversed in the past few years to where the grass beds are re-establishing previous areas and new areas appropriate for the grasses (in terms of water depths and light penetration). Future monitoring of the seagrasses will be conducted to see if this trend continues. 00110.tea, • .1611.1 M 1 tti of. ,T, — ,44..., ,, 1kiim . rihms"' , , Ifa a. i ..t. 1t, 4.' 4 K-i �"'. 1,4119«.24.2:' w ,r., -4l �•'r 3'. .a ,. • t :t-kaa ' .I 1 2013 Seagrass Coverage A3-7 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 45 of 108 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 APPENDIX 4 - PHYSICAL AND NATURAL RESOURCES A4 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 46 of 108 Appendix 4—Documented Species with in the Clam Bay NRPA NOTE SOIL SECTION IS IN THE MAIN BODY OF THE TEXT AND SHOULD NOT BE IN TWO PLACES IT FITS BETTER IN THE BODY OF THE TEXT SO DELETED FROM THIS SECTION.. MIN _ y Toj�ography is shown below using a Light Detecting and Ranging map(LIDAR)obtained from Collier County. The elevations within the NRPA boundary range from+5.0 to-7.0 NAVD88. The surrounding lands are generally higher than the NRPA and generate the freshwater flows into the preserve(see attached!EYhibits). Comment(k2]:NOT NEEDED IS ANCILLARY DATA THAT IS IN BACKGROUND REPORTS OR SUPPLEMENTARY MATERIAL A4-1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 47 of 108 a,, Beachwalk CIH r � � o„ o • Tepee e l2 •044 E i RD. _ Canc`a^RD= i iii� n Y Banyan RD .f”, I �✓ a p e O o o ,01Z z �' GJfa0! m Eugenia DR <1 INN w O rt 0 i O. Gcoe .p C7 • w 95 >, c, • iv. m 031, �s Q'4A Z a'', e2. N r` m i w 0 0,5 07 �`03 a 7J 0 m. (:.7 ia G G .�,. o R' m Le end r.'.04`N Seagate DR Pine Ridge RD LIDAR^ 3of N�� o Pompei LN r"L'" \\1' illy! U i Nill LIDAR map of the Clam Bay NRPA Climate Clam Bay's climate falls within the United States Department of Agriculture(USDA) subtropical classification. There are essentially two seasons experienced. The wet season occurs in the summer, and the dry season occurs in the winter. Typical rainfall and temperature data are provided in Tables 1 and 2. In the summer the center of the trade winds shift north and moisture-laden breezes blow from the east or south-east. In winter the trade winds shift southward and the winds are less constant. Weather is then more influenced by fronts advancing from the northwest. This brings cooler conditions,although temperatures rarely reach freezing,due to the fact that they are being moderated by the surrounding waters. Cold fronts are typically preceded by winds from the southwest,which clock to the west then northwest as the front passes,with strong winds of 20-25 knots and cooler air. In general terms,winds are predominantly southeast during the summer and northeast during the winter. A4-2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 48 of 108 Historical meteorology for Clam Bay is based on data collected for 30 years(from 1981 to 2010) from Naples Municipal Airport by the Florida Climate Center(NOAA&FSU). The following charts present meteorological statistics for temperature and Iprecipitationl. Comment[k3]:SAME WITH THE CLIMATE DOES NOT REALLY RELATE DIRECTLY TO THE PLAN 1981-2010 Temperature and Precipitation Normals Graph 110.0 100.0 90.0 „• • •—• • • .. • • • a • 60.0 ••••••••••••• ••/ • '" "'+. o; 50.0 40.0 30.0 20.0 10.0 `,w.•...-..�•✓• 0.0 • exew.wa• •mammas• ..rawer • • •.aria..• Jen Mar Mar Jul Sep Nov 0 Precip (in) 0 Min Imp CF) 0 Avg Tmp CT) 0 Max Tmp(`F) The monthly average temperatures range from 64.5°F to 83.2°F. The lowest monthly minimum temperature is 54.2°F while the highest monthly maximum temperature is 91.2°F. The data reflect a humid subtropical climate with a narrow fluctuation in air temperature. Precipitation Average annual rainfall for the Naples Municipal Airport NOAA station is documented at 51.89 inches. The data in the table indicate the highest rainfall occurs during the summer months of ,lune,July,August,and September. A4-3 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 49 of 108 0 Precip(in) 0 Min Tmp(°F) 0 Avg Tmp(T) 0 Max Tmp(`F) January 1.85 54.2 64.5 74.7 February 2.10 56.8 66.9 76-9 March 2.38 60.0 70.0 79.9 April 2.36 63.4 73.3 83.2 May 3.16 68.5 78.2 87.8 June 8.82 73.9 81.9 89.9 July 7.27 74.9 83.1 91.2 August 8.58 75.3 83.2 91.0 September 7.69 74.8 82.4 89-9 October 4.19 70.0 78.5 86.9 November 2.04 62.9 72.1 81.2 December 1.45 57.0 66.8 76.6 Winds Winds are predominantly easterly throughout the year,but with a tendency to become northeasterly from October to April and southeasterly from May to September. Winds speeds, not including storm events are,on average,below 10 knots. During the winter months when fronts move through for a day or two at a time,winds out of the northwest to northeast may increase to about 25 knots. Sea breeze As the land surface around Naples and Clam Bay warms,the air above is heated. The warm air is less dense and tends to rise creating a lower air pressure over the land than the water. The cooler air over the water then flows inland creating a sea breeze. In the evening the reverse occurs and the cooler air over the land will flow back toward the water creating a land breeze. The incoming sea breeze acts as a lifting mechanism,resulting in the warmer air rising up to higher altitudes. This creates cumulus clouds that begin to build which leads to the development of afternoon showers and thunderstorms in the area. A4-4 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 50 of 108 Storms Naples and Clam Bay specifically are within the Atlantic Tropical Cyclone basin. This basin includes much of the North Atlantic,Caribbean Sea,and the Gulf of Mexico. On average,6 to 8 tropical storms form within this basin each year.The hurricane season lasts from June 1st to December 1st. The formation of these storms and possible intensification into mature hurricanes takes place over warm tropical and subtropical waters.Eventual dissipation or modification, averaging 7 to 8 days later,typically occurs over the colder waters of the North Atlantic or when the storms move over land and away from the sustaining marine environment. nvn n +gym M+ Due to the destructive nature of these storms, landfall can result in significant damage to upland development and facilities from storm surge,waves,and wind. A good example of this would be Hurricane Wilma which formed in 2005. Four (210-249) (4.0-5.5) A tropical storm is defined by maximum sustained winds from 35-64 knots(40-74 mph). A hurricane has maximum sustained winds that exceed 64 knots(74 mph). Hurricanes are classified into different categories according to the Saffir-Simpson scale. Hurricanes can also spawn severe weather such as tornadoes as they move inland. One 74-95 4-5 (I/0 1,/, /„ The table below lists the number of tropical storms and hurricanes that passed through or near Naples over the past 20 seasons including 1992 through 2012 as reported by the National Oceanic and Atmospheric Administration(NOAA)Coastal Services Center and Hurricane City(www.hurricanecity.com). Analysis of the available information indicates that Naples,on average, is brushed or hit by a tropical storm or hurricane once every 2.71 years and is directly hit once every 7.05 years. A4- 5 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 51 of 108 Number of Named Storms Passing through or near Naples Year #of Storms Names Strength closes aplesl_.—, Comment[KW4]:Check spacing if you keep this m 1C 1 Andrew 1-1nrricane Cat 1 1993 0 1994 1 Gordon Tropical Storm 1995 1 Jerry Tropical Storm 1996 0 1997 0 1998 1 Mitch Tropical Storm 1999 1 Harvey Tropical Storm 2000 1 Gordon Tropical Storm 2001 0 2002 0 2003 0 2004 1 Charley Hurricane Cat.3 2005 1 Wilma Hurricane Cat.2 2006 0 2007 0 2008 1 Fay Tropical Storm 2009 0 2010 0 2011 0 2012 0 2013 0 0/39/0 5[ GDLL•Il YV 'hl I ,LSP_ +}-.r' - 9 ,44 }4 $ 4 k c � i- t l.. f t,> . etc �11 1-_L- A4-6 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 52 of 108 Waves Clam Pass connects the Clam Bay system to the Gulf of Mexico's tidal water fluctuations and open coast wave energy. Clam Pass is subjected to relatively low wave energy. Significant wave heights in deep water commonly range between I to 3 feet(0.3 to 1m). Predominant wave directions are from the northwest to west,especially during the winter months,while summer and tropical storm events include wave energy from the south and southwest. The beach material is composed of fine sand having an average median grain size of 0.2 mm. The average net sediment transport along the southwest Florida coast is approximately 30,000 to 60,000 cubic meters per year to the south. The relatively small tidal prism for Clam Bay provides a critical balance between tidal flow in and out of the inlet channel and littoral processes moving alongshore. This affects the inlet hydraulic efficiency over time,especially when littoral transport rates are high due to periods of high wave energy. The wave climate at Clam Pass was obtained from the NOAA Wave Watch III(WW III)model. Wind and wave data were extracted at the nearest station, located approximately 2 miles offshore of the Pass. The data included significant wave height,wave period and direction,as well as wind direction and speed. A total of 8 years of data were extracted from the beginning of 2006 to the end of 2013. Figure 5 shows the wave/wind roses for the 8 year record. The wave and wind rose graphs show a color coded percentage of occurrence in wave height or wind speed in incremental direction bins of 12.5 degrees. The wave direction notation is where waves are originating from,while wind direction is where it is heading. The combined annual wave rose shows that largest waves and highest frequency waves typically originate from the northwest to west direction. Because the annual wave rose does not describe seasonal variations,the wave data of 2013 were evaluated monthly and represented by wave roses to assess variations in wave energy direction. Figure 6 shows comparisons of the monthly wave roses for the 2013 data indicating the temporal variation in the incoming waves during the winter and summer months. A4-7 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 53 of 108 WAVE R0SE. WIND ROSE • OM Mr MI WI Ale is 111116,..v a • •. te\ �: ,,..u .,.1 \ - Ya TFAIIINSIN (liT ■ Figure Si. Clam Pass,Wave&Wind Roses-2006 WAVE ROSE WIND ROSE MON NM MO ns w ,.• (. .•. M m o , .,\N„\\ 1..",,K. 4 .�� „'. %` 00 �� ��e'' NV MI SU • v J: Va tic 9• 1 V a a E .0 ,: t j 010,,nrq.Ini woo SW.(on) IEgun 2.Clam Pass.Wave&Wind Roses-2006 to 2013 -and Wave Roses-2013(Provided by Hum iston and Moore) A4-8 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 54 of 108 Comment[k5]:THEIS SECTION IS ALMOST � Qmtntlttt+e __ WORD FOR WORD AND SHOULD NOT BE IN TWO PLACES IS EXPANDED HERE IN SOME AREAS BUT IS NOT NEEDED SO KEPT THIS SECTION IN THE BODY OF THE TEXT AND Plant Species—List based on FLUCFCS Mapping DROPPED FROM THE APPENDIX. Representative Plant Species found within the NRPA Boundary FLUCFCS Code 181—Swimming Beach COMMON NAME SCIENTIFIC NAME Seagrape Coccoloba uvifera Sea Oats Uniola paniculata Railroad vine Ipomoea pes-caprae FLUCFCS Code 322—Coastal Scrub COMMON NAME SCIENTIFIC NAME Seagrape Coccoloba uvifera Cabbage Palm Sabal Palmetto Buttonwood Conocarpus erectus Spanish Bayonet Yucca aloifolia Saltbush Baccharis halimifolia Beach Naupaka Scaevola taccada Australian Pine Casuarina equisetifolia FLUCFCS Code 428—Cabbage Palm Hammock COMMON NAME SCIENTIFIC NAME Cabbage Palm Sabal palmetto Seagrape Coccoloba uvifera Strangler Fig Ficus aurea Saffron Plum Sideroxylon celastrinum Coinvine Dalbergia ecastaphyllum Brazilian Pepper Schinus terebinthifolia Beach Naupaka Scaevola taccada FLUCFCS Code 612—Mangrove Swamps(Forest) COMMON NAME SCIENTIFIC NAME Red Mangrove Rhizophora mangle White Mangrove Laguncularia racemosa A4-29 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 55 of 108 Black Mangrove Avicennia germinans Buttonwood Conocarpus erectus Leather Fern Acrostichum danaeifolium Saltwort Batis maritima Glasswort Salicornia bigloveii FLUCFCS Code 642—Salt Marsh COMMON NAME SCIENTIFIC NAME Lance-leaf Arrowhead Sagittaria lancifolia Needlerush Juncos roemerianus Bulrush Scirpus californicus Carolina Willow Salix caroliniana Peruvian Primrosewillow Ludwigia peruviana Animal Species The following list of species has been observed within the Clam Bay NRPA and the adjacent Pelican Bay development areas. These lists are not all inclusive but represent a wide array of the species found within and adjacent to the Clam Bay NRPA habitats. Aquatic Invertebrates From Conservancy Report Aquatic Invertebrate species found within the NRPA�ioundaryi Comment[KW6]:Scientific names need format fixing COMMON NAME SCIENTIFIC NAME American Oyster Crassostrea virginica Brittlestar Ophiophragmus filogr n eus Florida Crown Conch Melongena corona Grass Cerith Bittiolum varium Heart Urchin Moira atropos Pointed Venus Clam Anomalocardia auberian a Shell-encrusted tubes Polychaeta Stout Razor Clam Tagelus plebeius Trumpet worm tubes Pectinaria gouldi Worm mud tubes Polychaeta sps. Quahog Mercenaria mercenaria Atlantic Bay Scallop Argopecien irradians Atlantic Oyster Drill Urasalpinx cinera Whelk Melongenidae spp. West Indian Worm Snail Vermicularia fargoi Lace Murex Chicoreua florifer dilectus n era Horse Conch Pleuroploca giganteaulifl Mangrove Periwinkle Littoraria scabra ang A4-30 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 56 of 108 West Indian Worm Snail Vermicularia spirata Florida Fighting Conch Strombus alatus Penaeod Shrimp Penaeidea spp. Tunicates Ascidiacia spp. Blue Crab Callinectes sapidus Fiddler Crab Uca spp. Ocypodidae(Ucides)spp., Grapsidae Mangrove Mud Crab spp., and Gecarcinidae spp. White Fingered Mud Crab Rhithropanopeus harrisii Depressed Mud Crab Eurypanopeus depressus Common Mud Crab Panopeus herbstii Fish Fish species found within the NRPA boundary COMMON NAME SCIENTIFIC INAMFI Comment[KW7I:When using the asterisks / make footer available on each page have asterisk so easier to read. American Eel Anguilla rostrata Atlantic needlefish Strongylura marina Barracuda Sphyraena barracuda Bay anchovy Anchoa mitchilli Blacktip Shark Carcharhinus limbatus Cowfish Acanthostracion quadricornis Flounder Paratichthys albigutta Gray or Mangrove snapper Lu Janus griseus Great barracuda Sphyraena barracuda Gulf killifish Fundulus grandis Hammerhead Shark Sphyrna mokarran Inshore Iizardfish Synodus foetens Killifish spp. Fundulus spp. Leatherjacket Oligoplites saurus Longnose killifish Fundulus simitis Mullet Mugil cephalus Mutton snapper Lu janus anatis Needlefish Strongylura marina Permit Trachinotus falcatus A4-31 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 57 of 108 Pigfish Orthopristus chrysoptera A4-32 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 58 of 108 Pinfish Lagodon rhomboides Pipefish Syngnathus spp. Puffer Sphoeroides parvus Sailfin molly Poecilia latipinna Sand perch Diplectrum bivittatum Scaled sardine Harengula pensacolae Sea robin Prionotus scitulus Sheepshead Archosargus probatocephalus Sheepshead minnow Cyprinodon variegatus Silver jenny Eucinostomus gula Smalltooth Sawfish* Pristis pectinata Snook Centropomus undecimalis Spot Leiostomus xanthurus Spotfin mojara Eucinostomus argenteus Spotted seatrout Cynoscion nebulosus Tidewater silverside Menidia peninsulae Triggerfish(Grey) Balistes capriscus White grunt Haemulon plumierii Whiting Menticirrhus littoratis Reptiles and Amphibians Reptile and Amphibian species found within the NRPA Boundary COMMON NAME SCIENTIFIC NAME SNAKES Banded water snake Nerodia faciata faciata Black racer Coluber constrictor Common garter snake Thamnophis sirtalis Eastern coachwhip Masticophis flagellum Mangrove salt marsh water snake Nerodia clarkii Mud snake Farancia abacura Red rat snake* Elaphe guttata guttata Ring-necked snake Diadophis punctatus Yellow rat snake Elaphe obsoleta A4-32 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 59 of 108 LIZARDS AND CROCODILIANS American alligator* Alligator mississippiensis Brown anole Anolis sagrei Brown basilisk lizard Basiliscus villains Cuban knight anole Anolis equestris Eastern glass lizard Ophisaurus ventralis Green anole Anolis carolinensis Southeastern five-lined skink Eumeces inexpectatus FROGS AND TOADS Cuban treefrog Osteopilus septentrionalis Eastern narrow-mouthed toad Gastrophryne carolinensis Eastern spadefoot toad Scaphiopus holbrookii Giant marine toad Rhinella marina fka Bufo marinas) Green treefrog Hyla cinerea Oak toad Anaxyrus quercicus Southern leopard frog Lithobates sphenocephalus Southern toad Bt fo terrestris Squirrel treefrog Hyla squirella TURTLES AND TORTOISES Chicken turtle Deirochelys reticularia Florida box turtle Terrapene carolina bauri Florida redbelly cooter Pseudemys nelsoni Florida snapping turtle Chelydra serpentina osceola Florida softshell turtle Apalone ferox Gopher tortoise* Gopherus polyphemus Green sea turtle* Chelonia mydas Loggerhead sea turtle* Caretta caretta Peninsula cooter Pseudemys peninsularis Pond(yellowbelly)slider Trachemys scripta scripta Striped mud turtle* Kinosternon baurii A4-33 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 60 of 108 Birds Bird species found within the NRPA Boundary COMMON NAME SCIENTIFIC NAME American avocet Recurvirostra americana American coot Fulica americana American kestrel Falco sparverius American oystercatcher* Haematopus palliatus American Robin Turdus migratorius Anhinga Anhinga anhinga Bald eagle Haliaeetus leucocephalus Barred owl Strix varia Belted kingfisher Megaceryle alcyon Black skimmer* Rynchops niger Black vulture Coragyps atratus Black-and-white warbler Mniotilta varia Black-bellied plover Pluvialis squatarola Black-crowned night heron Nycticorax nycticorax Black-necked stilt Hirnantopus mexicanus Blue jay Cyanocitta cristata Blue-gray gnatcatcher Polioptila caerulea Boat-tailed grackle Quiscalus major Brown pelican* Pelecanus occidentalis Brown thrasher Toxostoma rufirm Budgerigar Melopsittacus undulatus Caspian tern Hydroprogne caspia Cattle egret Bubulcus ibis Chuck-will's-widow Caprimulgus carolinensis Common grackle Quiscalus quiscula Common ground-dove Columbina passerina Common moorhen Gallinula chloropus Common nighthawk Chordeiles minor Common snipe Gallinago gallinago Common tern Sterna hirundo Common yellowthroat Geothlypis trichas A4-34 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 61 of 108 Double-crested cormorant Phalacrocorax auritus Downy woodpecker Picoides pubescens Dunlin Calidris alpina Eastern screech owl Megascops asio Eurasian collared dove Streptopelia decaocto European starling Sturnus vulgaris Fish crow Corvus ossifragus Forster's tern Sterna forsteri Glossy ibis Plegadis falcine/lus Gray catbird Dumetella carolinensis Great blue heron Ardea herodias Great crested flycatcher Myiarchus crinitus Great egret Ardea alba Great horned owl Bubo virginianus Greater yellowlegs Tringa melanoleuca Green heron Butorides virescens Green-winged teal Anas crecca Herring gull Lams argentatus Hooded merganser Lophodytes cucullatus House sparrow Passer domesticus Killdeer Charadrius vociferus Laughing gull Leucophaeus atricilla Least sandpiper Calidris minutilla Limpkin* Aramus guarauna Little blue heron* Egretta caeruiea Loggerhead shrike Lanius ludovicianus Long-billed dowitcher Limnodromus scolopaceus Magnificent frigate bird Fregata magnifcens Mangrove cuckoo Coccyzus minor Merlin Falco columbarius Mocking bird Minus polyglottos Mottled duck Anas f dvigcla Mourning dove Zenaida macroura Muscovy duck Cairina moschata Northern bobwhite Colinus virginianus Northern cardinal Cardinalis cardinalis A4-35 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 62 of 108 Northern gannet Monis bassanus Northern parula Parula americana Northern waterthrush Seiurus noveboracensis Osprey* Pandion haliaetus Painted bunting Passerina ciris Palm warbler Dendroica palmarum Peregrine falcon Falco peregrinus Pied-billed grebe Podilymbus podiceps Pileated woodpecker Dryocopus pileatus Piping plover* Charadrius melodus Prairie warbler Dendroica discolor Purple gallinule Porphyrula martinica Red knot Calidris canutus Red-bellied woodpecker Melanerpes carolinus Red-breasted merganser Mergus serrator Reddish egret* Egretta rufescens Red-shouldered hawk Buteo lineatus Red-tailed hawk Buteo jamaicensis Red-winged blackbird Agelaius phoeniceus Ring-billed gull Larus delaivarensis Roseate spoonbill* Platalea ajaja Royal tern Sterna maxima Ruby-throated hummingbird Archilochus colubris Ruddy turnstone Arenaria interpres Sanderling Calidris alba Sandwich tern Sterna sandvicensis Semipalmated plover Charadrius semipalmatus Short-billed dowitcher Limnodromus griseus Snowy egret* Egretta thula Spotted sandpiper Actitis macularia Swallow-tailed kite Elanoides forfcatus Tri-colored heron* Egretta tricolor Turkey Meleagris gallapavo Turkey vulture Cathartes aura Western sandpiper Calidris mauri White ibis* Eudocimus albus A4-36 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 63 of 108 White pelican Pelecanus erythrorhynchos Willet Catoptrophorus semipalmatus Wood stork* Mycteria americana Yellow-bellied sapsucker Sphyrapicus varius Yellow-crowned night heron Nyctanassa violacea Yellow-rumped warbler Dendroica coronata Yellow-throated warbler Dendroica dominica Mammals Mammal species found within the NRPA Boundary COMMON NAME SCIENTIFIC NAME Big brown bat Eptesicus fuscus Bobcat Lynx rufus Bottle-nosed dolphin Turciops truncates Brazilian free-tailed bat Tadarida brasiliensis Coyote Canis latrans Eastern gray squirrel Sciurus carolinensis Eastern mole Scalopus aquaticus Feral domestic cat Felis catus Florida Black bear Ursus americanus floridanus Florida Panther Puma concolor coryi Gray fox Urocyon cinereoargenteus House mouse Mus musculus Marsh kabbitl Sylvilagus palustris %Comment[KW8]:Capitalize rabbit , Nine-banded armadillo Dasypus novemcinctus Raccoon Procyon lotor River otter Lutra canadensis Roof rat Rattus rattus Virginia opossum Didelphis virginia West Indian manatee Trichechus manatus * Indicates Endangerd Species,Threatened Species,or Species of Special Concern A4-37 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 64 of 108 CLAM BAYNRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 APPENDIX 5 - CLAM PASS MAINTENANCE DREDGING DESIGN CRITERIA A5 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 65 of 108 Appendix 5 - Clam Pass Maintenance Dredging Design Critera Bay Tide Range The existing hydraulic monitoring program provides water level measurements at several stations within the bay system. The hydraulic monitoring data provides a record of the tidal range in the bay which is an indicator to the tidal prism or volume of water flowing through the inlet at each tidal cycle. In this analysis a review of ratios of the bay tidal range to that of the Gulf tide is used as the monitoring indictor to the flow through the inlet. Figure A5-1 shows a definition sketch illustrating the tidal ranges for the Gulf and bay. The bay tidal range is typically smaller than that of the Gulf tide due to flow resistance through the inlet channel and shoal features. The figure also shows the locations of two of the bay tidal gages that are used in this analysis to represent the bay tide range. Figure A5-2 shows a plot of the annual ratios of bay to Gulf tide from 1998 to date. However, data collected in 2006 and 2007 were insufficient to provide an annual representation of the tidal range ratio. The figure indicates that when the inlet was hydraulically stable the ratio between the bay and Gulf tide was between 0.6 and 0.7 over 90% of the time. The data also show that this ratio was below 0.5 prior to 1999 dredging when the inlet was unstable and in 2012 prior to the inlet closure. Dredging occurred in 2002 and 2007 while the tide range ratio was within the stable range. These dredging events were carried out based on physical monitoring data. In both dredge events, approximately one-third of the 1999 dredge quantity had accumulated within the dredge template at the time of dredging. In both dredge events the dredged material was placed south of the inlet. Physical Monitoring Data Analysis In addition to the hydraulic monitoring program, analysis of the physical monitoring data is used to characterize the flow areas and shoaling within the channel and flood shoal areas. The physical monitoring data includes bathymetric surveys of the inlet channel, flood shoal and ebb shoal features. The data analysis includes evaluation of the flow cross-section areas in three main sections of the dredging template, Sections A, B and C. Figure A5-3 shows the dredge template and the three monitoring segments. Section A represents the inlet channel, Section B represents the seaward part of the flood shoal and Section C represents the bay side part of the flood shoal. The analysis included evaluation of the cross section of flow below mean high water and volume of sand within each segment. The cross section of flow was computed at each survey station spaced approximately 50 feet apart. The average and minimum cross section areas were used as indicators of the physical condition of the flow area through each of the three segments. The cross section areas were compared to the design cross section area of 2013 dredging and the inlet conditions in 2004 and 2008. The 2008 and 2004 inlet conditions were used as a background benchmark for inlet conditions near equilibrium as the 2004 and 2008 survey were completed 2 years and 16 months following the 2002 and 2007 dredging event respectively. These conditions represent the inlet at stable conditions after the post dredging adjustment phase. 0 Co 0 cn a) U a) ca t .+� �''{. ' '" 5s 'xa. L.A�ny 1:' , M if` xri '«-t ,� tri, _ . -' . ,.... tt', ,.n . ik z• �-t „'f'V'� ° 2S J 1 �i CO 't m t„e sf 41,-'' f w" f c ^0` a " g t, 'ti.. 7-fale' f,'� M S,.N �l Y r 2'4� I � ':::' ' c�i L�� •� y �� aft .. s. + ��� �i ?�?•- itt,t r%,qYt`.14 ttr u ,_y 4tAkf . • 1. ` , J ; '' v 0. 1 1� iic is•4 3s�r p`b t.51.1..)--47:::),',,,, 'J �;j T.T y .-Y4; . `` : 7:11;'' OD ("0O i EN !. ' cn 03 O if @ enc ,'- . .. .{r ` E O U >- iia c Y o N ID � N 0 a) - co misomil O E a) U Q O — Ocn0 a) r r_ euNM1 mi ........0 —.......,c no N` (II LiL ct cm P c [ ca G -0 Vas C; g, -e u 4 c CO c 0 .Co 0 0 0 0 a) T CO m C CO 0 a) IZ a) .0 O N O V N V f0 O a-+ II Y v) i C N U _ O N co , M ri U _c NI N -0 ✓ -trli O O `1 0 NI N N 0 O N . coo yi 0 cI • L 0 [Q 1 00 ON U o 0 as N a) m L U, 0 ® N to C L •o tia, -o Y 0 } 7O co • O N cc CD s bA CO C o N cc CO 0 > O C -0 N N CO 1— G v m o `° iO U N I I - 00 61 al c-I 0.0 C WD N "0 If) 0 0 0 0 0 0 0 0 0 0 0rn a, rn 01m 0 0 0 0 0 0 0-r-0 0 0 ,--1 ling of ogea aSuea aplia8eaand ienuuy mir J Cl). 0 Cl) a) U Z a) co T co m C Co 0 --a-) a. a) O a) v ..• (N EN 0 s— as N CO E 03 p Y a0s ,/ . { co p • a) (gyp t` OE r, , _ U 3 aS O Cn a 1 r • cn r ..3 1 -¢_ QJ E to PP to C s l . o rR „-� 4,, ',,. • 5 03 C- «. �;-��� • j E U U a M o 0 a a.) a) OA in LL October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 69 of 108 Section A Inlet Channel The indicators used in this analysis were average cross section area, minimum cross section area and total volume of sand within Section A. Figure A5-4 shows the change of average flow cross- section area below mean high water for Section A. The figure covers the time period from January 2013 (pre-dredging conditions) to April 2014 (12 months post-dredging). The figure shows the change in cross-section area from pre-dredging conditions when the inlet was closed and its evolution immediately following dredging to 4 months, 7 months, and 12 months post dredging. The figure also shows the benchmark reference areas for the 2004 and 2008 average cross sections and the 2013 design cross section area. The data indicate that following the inlet opening in 2013 the average cross section shoaled below the design area while the inlet morphologic features were forming. After the initial adjustments the cross section area increased to above the design area and 2008 conditions,but remained below the 2004 conditions. Figure A5-5 shows the change of the minimum flow cross section area below mean high water for Section A. The figure also shows the change in minimum cross section area from pre- dredging to 12 months post dredging with comparison to the 2004 and 2008 minimum cross sections and the 2013 design cross section area. The data indicate that following the inlet opening the minimum cross section shoaled then steadily increased. The minimum cross section area remained smaller than the design cross section area, but approaches the design cross section area after 12 months. Figure A5-6 shows the change in total volume of sand accumulated in the dredge template since inlet opening. The figure shows that the Section A dredge template has accumulated sand within the dredge cut. It should be noted that the channel migrates and meanders within in the vicinity of the dredge cut. Thus, this indicator should not be used as a measure of critical conditions of the channel. Figure A5-7 shows a table of the design criteria parameters for Section A with comparisons to post dredging measurements.Recommended target values for each parameter are shown in red. Section B Flood Shoal The cross section area of flow through the flood shoal in Section B is an important indicator of the flow exchange between the bay and inlet and the flow efficiency to maintain the tidal range within the bay. Figure A5-8 shows the change of average flow cross section area below mean high water for Section B since inlet reopening. The figure covers the time period from January 2013 (pre- dredging conditions when the inlet was closed) to 12 months post dredging in April 2014. The figure shows how the average cross section evolved immediately following dredging to 4 months, 7 months and 12 months post dredging. The figure also shows the benchmark reference cross section areas for the 2004 and 2008 conditions and the average design template dredged in 2013. The data indicate that following the inlet opening the average cross section shoaled below the design area while the inlet morphologic features were forming. This process October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 70 of 108 has continued throughout the 12 months post dredging. The cross section area remained larger than 2004 and 2008 conditions during the first 6 months post dredging then shoaled significantly in the following 6 months. The 12 months post dredging data indicate that the average cross section area within Section B became smaller than both historical benchmark conditions of 2004 and 2008. C O U) 0 N a) U Z a) T co m C CO 0 .� a. a) L O V a) '- 0 O O O N N E J E N V U o CO >' • 0 C ami CO N I .0 O NO • O v t) f6 > ^ 0 V T rsi CM M ' N O h • .... (15 O a O Y c0 a) U aJ Q Cr N >1 CD CO C CO "-t O OD v1 O.) 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C O •O f6 aJ 0 ON 000 Ln0 U Cp M m A mm m m c G a 0 C a C .- O dJ C I . c U 's;, •!..! taA of) 4—, U " 0 N C H N0 O N N O a--+ 0 0 o o_ Q O O rl EA ( 0) L a) 03 O 0 0 co 0- mCID r-I c 0 U) 0 N a) U Z a) 0) T COCO C (6 U a) O_ a) L o ,i- a) v r1 a) o N N E N Ca O p O c Y CO T • v) N co 2 I N " L• O OL N - N CO > U N NU Ili N \ U T m c m on m ✓ L fa m as ca O N TO flU N CO O O O 0 0 c\-1 N a) Lo N N N N -1 o E a> I U M a 0 v) o_ I i o N - N c-1 c-1 ,-1 CO 0N C - \ 0 \ U O Cl) Ln IM c-1 [a O a) - N Q 7 CO 0 U- m eM 4O 0N c C - \ O 0 In N U }/ 1D a) UIn , W N i A M 0 vi �-1 O L O I - U \ a) fa Lo 00 Ln CO Ly N • o a 0 N c - c^-1 LL m 4- 0 M C O rsi0liD • N U N N Lf) N ci O Q (n I 1 I 1 I 1 N 1.1O L o o O O \ Ui, O V1 d' M ON O HN 1. (4 bs)MHW mops easy uoipas ssoip October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 76 of 108 Figure A5-9 shows the change of the minimum flow cross section area below mean high water for Section B since inlet opening. The data indicate that following inlet opening the minimum cross section shoaled to a level similar to the 2008 conditions. After the initial post dredging adjustment the minimum cross section area of flow, the 4 month and 7 month post dredging conditions became larger than the conditions of 2004 and 2008. However, at 12 months post dredging the minimum cross section dropped below the 2004 and 2008 conditions. Figure A5-10 shows the change in total volume of sand accumulated in the dredge template following inlet opening. The figure shows that over 5,500 cubic yards of sand were dredged from Section B. Over the 12 months since dredging nearly 5,000 cubic yards have accumulated in Section B. The amount of material accumulated in Section B after 12 months was much greater than the 2004 and 2008 conditions. Figure A5-11 shows a table of the design criteria parameters for Section B with comparisons to post dredging measurements. Recommended target values for each parameter are shown in red. Section C Outer Flood Shoal Section C represents the outer(bay side)flood shoal area of Clam Bay which is also a junction in the Clam Bay system where flow from the north and south tributaries connects to the inlet. Restriction of this area below design levels may reduce the tidal ranges in the bay system and therefore reduce tidal flow through the inlet. Only part of Section C was dredged in the 2013 maintenance dredging. This analysis is presented in part based upon the dredged portion of Section C and in part based upon the entirety of Section C. Figure A5-12 shows the change of average flow cross section area below mean high water for the dredged portion of Section C in 2013. The figure covers the time period from January 2013 to 12 months post dredging. This illustrates pre-dredging conditions when the inlet was closed, how the average cross section evolved immediately following dredging,4 months,7 months,and 12 months post dredging. The figure also shows the 2008 average cross section area and the design template area dredged in 2013. The data indicate that since Section C was partially dredged the average cross section remained below the 2008 conditions. The data also shows that the average cross section area in the dredged portion of Section C was similar to the 2008 conditions at 7 months post dredging and approached pre-dredging conditions at 12 months post dredging. Figure A5-13 shows the change of the minimum flow cross section area below mean high water for all of Section C following inlet opening. The data indicate that since Section C was partially dredged the average cross section generally remained below the 2004 and 2008 conditions. Figure A5-14 shows the change in total volume of sand accumulated in the dredged portion of Section C since inlet opening. The figure shows that over 2,000 cubic yards of sand were dredged from Section C. Over the 12 month period since dredging, approximately 1,500 cubic yards have accumulated in Section C. The accumulated material in the dredged portion of Section C is greater than the conditions of 2004 and 2008. Figure A5-15 shows the change in total volume of sand in all of Section C including the part that was not dredged in 2013. This figure illustrates the relative amount of dredging to the total October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/27/2014 Page 77 of 108 volume within the template. The figure also shows the volumes within the template for 2004 and 2008 conditions. Figure AS-16 shows a table of the design criteria parameters for Section C with comparisons to post dredging measurements. Recommended target values for each parameter are shown in red. O a a) 0 Z (1) Cl) T (O CO C (6 0 .a) d a) L O .4 • V `i O N C N E• No C V O O vo T >, H Ncr 001:12 II /, ° o E N 03 � E N ✓ as m • m C ' C C N TCDm m co o 04 -0 o O O O \ m . r• 01 0D � II 01 Q 0 N - N N m 0 N rn O m ti 0 N d- CO °a C O CO rnU Orq a▪) G - ul I N @ U a a N o 0 1 _ N LL RS \ O a) `" C Q Cl co 7, Y U a) LI m 2U O c C O E N _ O C N C c\-I G QJ ® 01 N N u1 V1 o Q 0 L O O O O O O U N o o a o 0 0 (4 bs)MHIN mops eaiv uoi;gas sso.i C O u) U) U 2 O >, (a CO C (6 U a) a . m o cr m � -1 O O o N E ti N E N a O cr 0 o 0 N N• >� • ) ' JAS ) c0i co ? 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CL u) L V-' O N• cO NIO N \ E N \ O OV U —1 co O OO O ea T • N N N a, I o E O N O NJ U >, m N• as Yoo d- o 05.0 o N N • O e--1 CD CO 0O `~ o .00 C U 7 N m O (n n. 0 o U^' " NJ\ N W • \ (.111-1 4- O 0 N Q - \ CO 1 0 a) m ca 0 Q - (-4 U E • ri . \ O Q) 0O +_) m N GJ o b.0 NI 13 N +(U a) as � Q LCI E m F- v .� - oN CD a) L v E Ln 0 Y •C • m c \O O 0 `° / • • NNI ice, e-i\ (B m 2 4- m O e•i C) 0 NJ E L- - I N 0 c\i • LA ei N LA eI I 1 I 1 I i 0 NJ n O0 0 00 0 0 N N- l0 LU cr m NJ 0 `-' (AD)aleldwa1 apaia u!luawipas F.- October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 85 of 108 Inlet Channel Length The channel length is an important factor in the inlet stability parameters. A longer inlet channel will provide greater resistance to flow. Higher flow resistance will reduce the tidal range and increase the phase lag with the gulf tide which reduces the tidal prism and flow through the inlet. Figure A5-17 shows a selection of aerials showing Clam Pass from 2004 to 2013. The figure shows the range of channel orientation and change in channel length and beach width on both sides of the inlet during that period. Figure A5-18 shows a plot of the approximate channel length measured at the center line of the channel through Section A from open coast to the beginning of Section B. The plot shows the dredged channel length of approximately 250 feet. Pre-dredging conditions show a channel length of over 500 ft. The data shows the channel in Section A meandered to over 600 feet in length before the inlet closed in 2012. Figure A5-19 shows a table of the design criteria parameters for channel length with comparisons to post dredging measurements and mapping of the channel evolution since reopening in April 2013.The recommended target value for channel length is shown in red. A similar situation also occurs in Sections B and C. After dredging, these Sections behave as bay areas where sand may accumulate. As sand accumulates these areas become channelized. This channelization increases the overall channel length and adds to the flow resistance and attenuation of the bay range. When the flood shoal areas fill to capacity, the connection between the gulf and bay become a very long meandering channel that dissipates the tidal range and diminish the flow rate beyond critical conditions needed to keep the inlet open. Such conditions existed in the late nineties and in 2012 prior to inlet closure. Maintenance dredging of Sections B and C as conducted in 1999, 2002, 2007 and partially in 2013 is necessary to keep the inlet stable. Ebb shoal The size and shape of the ebb shoal is a key factor to the stability of the inlet that supports the stability of the system. The ebb shoal helps to keep the inlet open when facing storms and big wave events. The ebb shoal delta provides sheltering to the channel and sand bypass pathway around the inlet without filling it closed. The shape and volume of the ebb shoal are additional indicators of the stability of the inlet. Ebb shoal critical conditions include onshore collapse of the ebb shoal that can be indicated by significant change in ebb shoal offshore distance, volume, and increase in dry beach areas adjacent to the inlet. Figure A5-20 shows a table for the ebb shoal design criteria parameters and monitoring measurements since inlet opening in April 2013. Recommended target values for the ebb shoal are presented in red. Ecology The only reason for dredging to be considered is to maintain the ecological health of the NRPA. Any decline in the health of the flora or fauna or any indication of system stress will be assessed to determine if tidal flushing could alleviate the problem without causing irreversible harm to other { mmmion October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/27/2014 Page 86 of 108 a biological components of the esturary.If dredging is under consideration,all pros and cons will be weighed in relation to impacts on vital components of the ecosystem prior to being implemented. C 0 .� 0 CO O U a) co T C ,. 0„iivoidottio:_. Lts m C U is N N N N N CU O O ' UNI p T CD - m >O - ♦ ,- ��CV I °: C O 0 0 O O O O O O N -a O In ® O O O O O +-, N._ \ C) (� �.. C } GA 1 i� UA H N -0 N O 0 L C 4—, -0 2 c M to O 0 0 N ol i tX) 0 OV) 61 Co O N In o o Ln Oin 0 22 ca (1)colcn r m A Cr) d- m m m 0 to •� ++ as ›. 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O m co t -o o a lol a1 0 m m -6 Q .0 n o fEa C —* Q 0 a E a C O O m U m m z c t VI C• 'O N m a w •+ Z. 01 C E v 44 _ L �mj m tU - Y o C C C C _Caw C m m •a o w- 3 a t 1 CU 0 3 0 1-- in} ? k N 0 U) N 0 a) T m 07 (4 U a) d U) L O O '4- ▪E,O csi N O T co 0] E>O UL m co p Y o N O N P[O O E O m U 7 f6 Ou)d October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 1 of 83 SECTION 5 NATURAL RESOURCES OFFSHORE CLAM PASS INLET MANAGEMENT PLAN July 1995 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 2 of 83 A. HARD BOTTOM IDENTIFICATION AND HABITAT OFFSHORE OF CLAM PASS 1. METHODS An element of the Clam Pass Inlet Management Plan was to identify the approximate location of hard bottom offshore of the Inlet and to identify the natural resources associated with these bottoms. Hard bottom areas were located with the use of a bottom finder(KING 1350 Model 1350A, 11-40voc). East-west transects were run using the Department of Natural Resources beach monuments R39 through R42 as reference points. Transects were run out to approximately 3,000 feet offshore. A perpendicular(north-south)set of transects were run on approximate increments of 300 feet(from east to west)to a distance of approximately 3,000 feet offshore. Examination of bottom finder returns was used to locate any hard bottom throughout this area. Once located, "bounce"dives were performed to observe conditions on the bottom. To the best of their ability in murky water, divers identified and documented organisms, vegetation and/or bottom types and photographs were taken using a Canon As-6 camera. • 2. DISCUSSION Sand substrate containing a thin layer of silt dominated the Gulf floor offshore to approximately 200 feet. This area contained numerous organisms such as the Parchment tube worms (Chaetopterus variopedatus)which are known to inhabit the shallow waters of the Gulf. Other inhabitants of this area were the Florida 5- 1. October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 3 of 83 Fighting conchs (Strobus alatus) and the Stiff pen shell (Atrina regida). The Echinoderms were represented with species such as the Sand dollars (Melita quiqiesperforada) and the nine armed sea star(Luida senegalensis). Numerous detached clumps of algae such as Gracilaria tikvahiae and Sargassum filipendula were seen shifting with the currents and tides. The only vertebrates that were visually identified consisted of Leatherjackets (Oliguplites saurus), Sea robins (Prionotus schitulus), Sand perch (Diplectrum bivttatum), and Toadfish (Opsanus beta). Seaward of the sandy bottom, hard bottom and vertical relief were noted. The initial indications of vertical relief contained scattered rocks with attached gorgonians (sea whips, sea fans), and various algaes. Relatively significant vertical relief was recorded throughout the vicinity of the Inlet. One of the two areas with the highest vertical relief throughout the study site was located from approximately 50' north to approximately 50' south of the Inlet and approximately 250-300 feet offshore. This area contained the highest diversity of algae, epifauna, and vertebrates. The area was inhabited by algae such as Caulerpa mexicana and Caulerpa prolifera. Different types of sponges were seen, some examples of which are Chondrilla nucula, known as chicken liver sponge; Niphates erecta, commonly seen in rocky areas; Cliona delitrix(red boring sponge); and Cliona celata, a common bright sulphur-colored sponge. Three stoney corals were dominant in this area: Siderastrea radiaus, which forms crust on rocks in shallow waters; Solenastrea hyades, lobed star coral; and Cladocora arbscula, tube coral. Two gorgonians, Liptogorgia virgulatra and Lephogia hebes were also commonly observed. The other area with high vertical relief was directly across from Florida Department of Natural Resources monument R-39, approximately 350' from shore. This area contained scattered rocks with both types of gorgonians 5 -2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 4 of 83 Leptogorgia virgulata and Lophogorgia hebes; algae such as Sargassum filipendula; and sponges such as Chondilla nucula and Cliona celata. Hard bottom areas contained numerous species of Echinoderms, Anthropods, and Fishes. The most abundant Echinoderms in this area were the variable urchin Lytechinus variegatus and netted sea star Luidia clathrate. There were numerous schools of fish such as thread-fin herring (Opisthonema oglinun) and Leatherjackets (Oliguplites saurus)throughout this area. Other species such as Pinfish (Lagodon rhombeides), Sheepshead (Archosargus probatocephalus), Tiger golby(Gobiosoma macrodon), and Stone crabs (Menippe mercenaria) were seen inhabiting areas containing rocky rumble and/or sea fans. A nurse shark(Ginglymostoma cirratum)was seen resting at the mouth of the Pass and a shark from the family Carcharhinidae was seen swimming rapidly away from the divers. • 5-3 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 5 of 83 3. ALGAE OBSERVED OFFSHORE Algae Green algae (Division chlorophyta) Acetabularia spp. Caulerpa sertularioides Caulerpa mexicana Caulerpa perolifera Penicillus capitates Ulva tactuca Ulva fasciata Udotea spp. Codiums spp. Red algae(Division rhodophyta) Gracilaria tikuahiae Hypnea spp. Brown algae(Division phaeophyta) Sargassum filipendula Dictyota divaricata* *The author believes this species to be correct. 5 . 4 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 6 of 83 4. INVERTEBRATES OBSERVED OFFSHORE Porifera Aplysina fistularis Chondrilla nucula Cinachyrella alloclada Cinachyrella kuekenthal Cliona delitrix Cliona celata Ircinia spp. Niphates erecta Hallclona spp. Cnidaria(corals) Cladocora arbuscula Diplorin spp. Muricen spp. Parazoanthus parasiticus Siderastrea radians Solenastren hyades Leptogorgia hebes Leptogorgia virgulata Polychaetes Aricidea philbinae Capitella capitata Fabricia trilobata Pricnospio heterobranchia 5 - 5 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 7 of 83 Tunicates Didemnum spp. Styela spp. Mollusks Fighting conchs Strobus alatus Pen shells Atrina rigida Echinoderms Beaded sea star Astropecten spp. Long-spined black urchin Diadema antillarum Netted sea star Luidia clathrate Nine-armed sea star Luidia senegalensis Variable urchin Lytechinus variegates Five-holed keyhole urchin Mellita quinquiesperforata Anthropods Stone crab Menippe mercenaria Horseshoe crab Limulus polyphemus Spider crab Libinia emerginata 5 -6 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 8 of 83 • 5. VERTEBRATES OBSERVED OFFSHORE Fish Leather jackets Oliguplites saurus Sea robin Prionotus scitulus Sand perch Diplectrum bivittatum Toadfish Opsanus beta Tiger golby Gobiosoma macrodon Sheepshead Archosargus probatocephalus Pinfish Lagodon rhombeides Nurse shark Ginglymostoma cirratum 5-7 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 9 of 83 - ,,Y -aAili'AF'; N T ---�1T-_— v- =__---_.--- =-thiii—i—in - ------ -....- ..-=--.'- : - kl _— inimitatimarLuiliamo-as 0 250 500 1000 -3 . .--ft'-, - •Z_� a ��w� ._ �pwtliwr��wsi SCALE LE 1'm5pp'-OP ."—= _______ 1114=— _. ew■ _evw��a— t. PELICAN BAY i "' .ininklan 111108 We� tBOARDWALK ?'-'-- c— MANGROVES - 1 - 1 alVilt ---.- 2101--1-411PAPI — ,, ...- 421E1 2111161111211M1111111111111111111111111011M/Sol/Mir -_- m-- „Ws - Alitl► as MANGROVES w;t _ ___.:_:.- 2_-_—_- ----=i•-- ."_ ^-1 -v r . I°Elml i - _ MANGROVES ,.'-. - Milliiidfflen= ---- _ iiii=1MIz 11 .Wirmanomin...011ft .......... _ ...___,___ ,...... ••••• Agagt• ... r _ 1 t _' - aTie�ia -.7-- r_ -_•.----- ., \ L—'— 4i*= TEMin .C v I • • __ ittr .VOID {�.�� �Q '---+.+n ._ ; OUTE.;.. COLLIER COUNTY CLAM BA ' _.0 -1 mrlt1�lj 111 -_ 1S BOARDWALK - - _. MANGROVES ] ��-- t T-71�Y�]sT --' i 4, L- larlinlikell I mil•"/ !omaiomiri.,Ips wirr�rwa,a mow, Turrell & Associates, Inc. .�-..s.�.w�,ITw�..._..� Marine & Environmental Consulting _ . - I 3684 Exchange Ave. Suite B, Naples. Fl. 33942 CLAM PASS HARD BOTTOM HARD BOTTOM TRANSECT LOCATIONS r TRANSECT LOCATIONS DESIGNED T.T.T. REVISION OwG.NAME 93701ST DRAWN w31.E. 7117195 51EET a OF 12 DATE 1/25195 SCALE r.500' JOE NO. 9370.5 SEC. TNT. RGE. October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 10 of 83 I N 1 — -�� i _-_c- 2tLE) 1000 R-4O " L - SCALE 1"..500'-0' • a . `- -- '� PELICAN BAY -=:. .. — \ C...) _ BOARDWALK__ -_� .- 1. Wil= • -_. HARD BOTTOM \ -_ Alt& IAREA' - _: _.s - _ = • =-, Q Q '—o-r { -_ - = MANGROVES • --.0- --'Mla 4111* _ _ • R-42 _ _ \_ -gym i zegilltr . � __ _ . . .r 3 .r.w. _-... _•,-..,--__-.4-. • TE .-•.___,__-•_,-_-•-_ /-- —• — COLLIER COUNTY CLAM BA eoARDWALK R- :. = ; Turrell do Associates, Inc. Marine & Environmental Consulting 3584 Exchange Ave. Suite B, Naples, Fl. 33942 CLAM PASS • -•, • INDICATES HARD AREA OF VERTICAL RELIEF DESIGNED T.T.T. REVISION DWG,NATE 9370 SR . '.: .. ' _ BOTTOM AREA DRAWN WAIL Innes SHEET II OF 12 DATE V25/e5 SCALE r•Soo' JOI NO. 9310.5 SEC. TWP. ROE. October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 11 of 83 OCEAN BOTTOM CROSS-SECTION IDENTIFYING HARD BOTTOM AREAS • RP; '��i b,kM y� + ,'�C'�'Y' a`� s�ir Ic��' et tom'` crR` e ' J "tt i ! ';! . r ''"" 'e �r", r„1.i � r 'r.. r I R ,r,,:.. r r.,F b+.l .., -ili` ��ui -.,.. 101.1',:f, =tii H. a:1 11,14...'4::'-'. water Surface : 1 1 {v c' . :19- - /0'.'tc/4 •111-P'l ..S.I.::.'11:1',11(:../. v I--- 4' '1- t\J-l1 ��. ' Fish 4. Vertical Relief - �jri.:rt „4' r 1 i, v a 01 i 1 ,1. :� b ; ' F` , ,lt 1 1 • �• d1(„:4,,-.. ' lir ,.:� ^ q:_ lie.. 1 �i,� . ' •;;�' �� ^i 4 !-;�:j �' tp ( ��' �% Y. 1, ,Milk il D t-' 1 t r a 11 l . v Of o g" . i ‘P c — ,,,,:? V,:•.1!.t., .'•,•: l'..1,•,:. • Ii: ,1 i . 1 • M : . fid' f .g d y�,j t7tr�e•¢ flp K „i�\f j') r t r,, •. ' j 1 I . ( ;1 ` 414 b��f iFTAg'1� ;li I F: (/ i+ii tr i Sand Bottom ' r. ' 11' r `Apl, i 1 r r I,44 ,'„1, r� si. r ii ,,i(el ',11 ..e,y,Jijr.f 1.,,c� r :l Jf• f ,/.ti y �i'1, '• if4lIli;�r .i r 1! iq • .1 f tf. . g P:•....'`''''.,' . y I �, ] 7 . 111 I I I. It )t Sand Bottom,,.,..-2.4,1L,,,:,.;' , • .;r, Hard Bottom 1. • C . - I! I i I ; i t 1 7°,4 I . �� . I I i ! L' t • SECTION 50 FEET NORTH OF CLAM PASS Turrell & Associates, Inc. Merin k Envirenmc ta1 Caneniting 9584 Exchange Ave. Suite B. Naples, FL 33842 CLAM PASS HARD BOTTOM AND VERTICAL RELIEF MAP DESIGNED T.T.T. SEASON DWG.NAME 9370NBX HARD BOTTOM INFORMATION DERIVED FROM DRAWN W.MB. 7117I95SHEET I OF 7 KING 1350 MODEL 1350A N-40 VOC BOTTOM FINDER DATE 1125155 SCALE r.400• Joe NO. 5370.5 SEC. TW?. RGE. October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 12 of 83 Table 1. FLUCCS code acreages for the Pelican Bay drainage basin(from Collier County Environmental Services Division, 1994). FLUCCS COMMUNITY ACREAGE 100 URBAN 1807 322 BEACH&STRAND 67 422 BRAZILIAN PEPPER 3 325 OAK 6 428 CABBAGE PALM 20 437 AUSTRALIAN PINE 1 513 TIDAL CREEK 23 530 STORM POND 144 542 TIDAL BAY 93 544 SALT POND 8 611 BAY FOREST 24 612 MANGROVES 443 641 FRESHWATER MARSH 23 642 SALT MARSH I 830 UTILITY SITE 12 911 SEAGRASS 10 5429 ARTIFICIAL CANAL 13 TOTAL ACREAGE 2698 5 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 13 of 83 Figure 2: Seagrass Meadows in Outer Clam Bay - _ _ ,, • ,. C lilt'. PASS ‘...41a 1 )-Z). . . _ • 1. I a t V • •, I R I • M>• t •, a iftlillh OUTER: _ CLAM '1l BAY • a am i se no SEAGATE From Collier County, 1994 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 14 of 83 Clam Bay Restoration and Management ►h Biological Monitoring Baseline/Pre-construction Report _ -- y Y s ' . Looking to the west over Outer Clam Bay at low tide seagrass beds are visible south of the County boardwalk and in the western part of the bay. ..Sd n Y.x .1 ] i ,; f. ray ' 4' Looking west over Clam Bay in the first days of dredging Cut 4. Mangrove Plot 2 is visible in the lower right corner of the photo. The decline in seagrass density from the 1993 photo is obvious. October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 15 of 83 Clam Bay Restoration and Management 14 Biological Monitoring Baseline/Pre-construction Report 4.3 Aerial Photographs .„ r ,--- „,.p..„1 ' = • X ",',111%.,14,, '� aA4....s. p, J 1-I 1! 3'3 1 -,,,...,,,--,,,..-.--7:-.-4: • tj� 4z, ttid i2 8'J 33 Views over the mangrove die-off area and Clam Pass in 1993. Note the extent of seagrass coverage in the channel and bay east of Clam Pass. October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 16 of 83 CLAM BAY NRPA MANAGEMENT PLAN October 2014 Version 6.4 PREPARED BY: TURRELL HALL&ASSOCIATES,INC 3584 EXCHANGE AVENUE NAPLES,FL 34104 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 17 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.64 TABLE OF CONTENTS CLAM BAY NRPA MANAGEMENT PLAN EXECUTIVE SUMMARY List of Figures• iii Acronym Key iv 1.0 Introduction 1 PURPOSE OF THE CLAM BAY NATURAL RESOURCE PROTECTION AREA MANAGEMENT PLAN 1 DEVELOPMENT OF THE CLAM BAY NRPA MANAGEMENT PLAN 1 ROLE OF THE PELICAN BAY SERVICES DIVISION 3 2.0 Overview of the Clam Bay NRPA 5 DESCRIPTION OF THE SYSTEM 5 ADJACENT COMMUNITIES 7 HISTORICAL OVERVIEW 8 MANGROVE DIE-OFF AND RESTORATION 10 3.0 Physical and Natural Resource Description and Assessment 12 SOILS 12 NATURAL COMMUNITIES 12 INVASIVE,NON-NATIVE AND PROBLEM SPECIES 22 LISTED SPECIES 23 OTHER SPECIES 24 HYDROLOGY 25 FRESHWATER COMPONENT 27 INLET DYNAMICS 28 WATER QUALITY 30 ARCHAEOLOGICAL RESOURCES 35 RECREATIONAL USE 35 4.0 Management Plan Goal and Supporting Objectives 37 OBJECTIVE 1-MAINTAIN AND PROTECT THE NATIVE FLORAL AND FAUNAL COMMUNITIES WITHIN THE CLAM BAY NRPA 38 OBJECTIVE 2-ENSURE THE ESTUARY HAS ADEQUATE TIDAL AND FRESHWATER FLOWS TO MAINTAIN ECOLOGICAL HEALTH WITHIN THE CLAM BAY NRPA 39 OBJECTIVE 3-MONITOR AND MAINTAIN WATER QUALITY WITHIN THE CLAM BAY NRPA 39 OBJECTIVE 4-MONITOR ARCHAEOLOGICAL SITES WITHIN THE CLAM BAY NRPA 40 OBJECTIVES-ENSURE RECREATIONAL ACTIVITIES ARE ENVIRONMENTALLY COMPATIBLE WITHIN THE CLAM BAY NRPA 40 5.0 Clam Pass Dredging 41 A. DREDGING POLICY 41 B. DREDGING CRITERIA 41 1. BAY TIDE RANGE 41 2. CROSS SECTION OF FLOW AREA AND VOLUME OF SHOALED MATERIAL 42 3. INLET CHANNEL LENGTH 43 4. EBB SHOAL 43 C. DREDGING CONSTRUCTION 44 1. TYPICAL CROSS-SECTIONS FOR DREDGING 44 6.0 Authorized Construction Activities 48 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 18 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 LIST OF PERMITS FOR WORK UNDERTAKEN TO DATE AND RELEVANT LEGAL FRAMEWORK 48 7.0 Clam Bay NRPA Management Plan Amendments 49 Clam Bay NRPA Management Plan Stakeholder Groups and Review Agencies 50 Clam Bay NRPA Management Plan Bibliography 52 Appendix 1—Timeline of Important Events within the Clam Bay NRPA and a List of Permits for Work Undertaken in and Around the Clam Bay NRPA 1 Appendix 2—A Recent History of Mangrove Management in Clam Bay 2 Appendix 3—A Recent History of Seagrass Presence in Clam Bay 3 Appendix 4—Physical and Natural Resources 4 Appendix 5-Clam Pass Maintenance Dredging Design Criteria 5 Appendix 6-Exhibits 6 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 19 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 CLAM BAY NRPA MANAGEMENT PLAN EXECUTIVE SUMMARY The Clam Bay Natural Resource Protection Area(NRPA) is a 570-acre estuarine system consisting of sandy beaches,Clam Pass,shallow bays,tidal creeks or tributaries,seagrass beds,and mangrove forests on the west coast of Collier County in Southwest Florida. The NRPA includes three primary bays,Outer Clam Bay(southernmost),Inner Clam Bay(central),and Upper Clam Bay(northernmost),connected by a series of tidal creeks and connected to the Gulf of Mexico by Clam Pass. The preparation and implementation of the Clam Bay NRPA Management Plan has been undertaken by the Pelican Bay Services Division at the direction of the Collier County Board of County Commissioners. The Management Plan will provide guidance for future management activities within the NRPA, building on the successes of the 1998 Restoration and Management Plan, by outlining the goal and objectives designed to protect,maintain,and monitor the natural resources within the NRPA and foster responsible stewardship going forward. The Management Plan provides an overview of the natural resources and processes within the NRPA along with a summary of the surrounding development and a brief historical perspective of past events and activities which have affected it. Coordination with community members and stakeholders has been balanced with anticipated administrative and financial resources to develop the following goal and supporting objectives for this Management Plan. Goal: To establish the basis for management activities that will be undertaken to protect the health of the Clam Bay NRPA estuary. Objectives to support this goal include: 1. Maintain and protect the native floral and faunal communities within the Clam Bay NRPA 2. Ensure the estuary has adequate tidal and freshwater flows to maintain ecological health within the Clam Bay NRPA 3. Monitor and maintain water quality within the Clam Bay NRPA 4. Monitor archaeological sites within the Clam Bay NRPA 5. Ensure recreational activities are environmentally compatible within the Clam Bay NRPA In support of these objectives, periodic monitoring of the terrestrial and benthic habitats will be conducted. Encroachments into the NRPA by exotic and nuisance vegetation will be documented and scheduled for removal or control. Observations and documentation of the wildlife utilization and population estimates within the NRPA will be documented periodically. Monitoring of water quality and freshwater inputs into the NRPA will be continued. Archaeological resources within the NRPA will be periodically monitored, and any degradation will be reported to the State Historic Preservation Offices. Educational opportunities will be explored and acted upon to promote environmentally compatible recreational uses within the NRPA. Irresponsible or environmentally damaging activities will be documented and,where appropriate,reported to the proper authorities. Regular monitoring of the Clam Bay flora and fauna will be carried out to ensure that the ecological health of the NRPA is maintained. In addition, regular monitoring hydrologic conditions will be ii October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 20 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 conducted to track the stability of the inlet.The Management Plan outlines the parameters thatbteill6bar investigated and used by qualified biologists and engineers to make recommendations to the PBSD and BCC on when and how dredging should be undertaken to maintain the long-term health of the estuary. Hydrologic Criteria Description Bay Tide Range Ratio Ratio comparison of the interior and Gulf tidal ranges Cross Sectional Area Area in different locations of the Pass through which water can flow Volume of Shoaled Material Quantity of sand and sediments within channel that can restrict flow Inlet Channel Length Distance water must flow through the beach and ebb shoal areas Ebb Shoal Distance from shore to the outer ebb shoal limits Ecological Criteria Description Mangrove Forest Examination of whether or not there are indications that the forest is being stressed by the lack of tidal flushing Sea Grass Beds Determine the extent of beds and whether or not dredging will directly or indirectly impact them Other Floral and Faunal Communities Determine if dredging could directly or indirectly negatively impact any floral or faunal components The Management Plan also includes typical dredging designs for the three main sections of Clam Pass and shows the cross sectional areas that could be dredged. All monitoring,investigative,and management activities from the preceding year will be compiled into an annual report and summarized in an annual presentation to the PBSD Board. Comparisons to historic data will be done where appropriate to track trends and make determinations as to whether additional interventions are needed to maintain the estuary's health. Biological monitoring, water quality monitoring, Pass bathymetry and status investigations, and any other activities conducted or data collected during the preceding year will be documented in the annual report. The Management Plan will be an integral part of permit application that may be required for management activities in the support of the Goal and Objectives. This includes permit applications for dredging Clam Pass and the interior cuts where the Management Plan will provide a blueprint for dredging criteria and conditions. The Plan will provide background information to permitting agencies regarding conditions that may be present, why management actions are being undertaken, and how impacts to the natural resources will be minimized. The document also allows for changes and modifications to the Management Plan should new information or management restoration techniques come to light that would benefit the Clam Bay NRPA. ii October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 21 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 List of Figures: Figure 1—Approximate extent of Clam Bay NRPA Boundary—Page 6 Figure 2—Historic Aerials of the location of Clam Pass—Pages 9-10 Figure 3—Soils map of the Clam Bay NRPA—Page 12 Figure 4—Beach habitat within the NRPA Boundary—Page 13 Figure 5—Coastal Scrub habitat within the NRPA Boundary—Page 14 Figure 6—Cabbage Palm Hammock habitat within the NRPA Boundary—Page 15 Figure 7—Open Water habitat within the NRPA Boundary—Page 15 Figure 8—Mangrove habitat within the NRPA Boundary—Page 16 Figure 9—Salt Marsh habitat within the NRPA Boundary—Page 18 Figure 10—Tidal Flat habitat within the NRPA Boundary—Page 18 Figure 11—Seagrass habitat within the NRPA Boundary—Page 19 Figure 12—Oyster locations within the NRPA Boundary—Page 20 Figure 13—Exhibit from Conservancy of Southwest Florida Report—Page 21 Figure 14—Hardbottom Community off-shore of the NRPA Boundary—Page 22 Figure 15—Approximate locations of Drainage Basins within the Pelican Bay Development—Page 28 Figure 16—Ebb and Flood Shoals—Page 29 Figure 17—Water Quality monitoring locations within and adjacent to the NRPA Boundary—Page 31 Figure 18—Proposed Water Quality monitoring locations within and adjacent to the NRPA Boundary—Page 34 Figure 20—Section A,B,and C of Clam Pass—page 42 Figure 21—Typical maintenance dredging cross-section—Inlet Channel—Section A—Page 45 Figure 22—Typical maintenance dredging cross-section—Seaward Flood Shoal—Section B—Page 46 Figure 23—Typical maintenance dredging cross-section—Bayside Flood Shoal—Section C—Page 47 iii October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 22 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Acronym Key BCC Collier County Board of County Commissioners CBRMP Clam Bay Restoration and Management Plan DHR Division of Historical Resources DNR Department of Natural Resources ESA Endangered Species Act FDEP Florida Department of Environmental Protection FLR Florida Department of Environmental Regulation FLEPPC Florida Exotic Pest Plan Council FLfjl em Florida Land Use,Cover,and Forms Classificatio FSU Florida State University FWfp Florida Fish and Wildlife Conservation Commissi FWS Fish and Wildlife Service LIDAR Light Detecting and Ranging MAG Mangrove Action Group ''/IGD Millions of Gallons/Day ,ISTBU Municipal Services Taxing Benefit Unit NMFS National Marine Fisheries Service NNC Numerical Nutrient Criteria NAA National Oceanic and Atmospheric Administratio NRCS National Resource Conservation Services NRPA Natural Resource Protection Area PBID Pelican Bay Improvement District PBSD Pelican Bay Services Division PUD Planned Unit Development ST Sensitive Treatment TMDL Total Maximum Daily Load USACE U.S.Army Corps of Engineers USDA United States Department of Agriculture USFWS U.S.Fish and Wildlife Service WBID Water Body Identification WC! Westinghouse Communities Inc. iv October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 23 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 1.0 Introduction Purpose of the Clam Bay Natural Resource Protection Area Management Plan The purpose of this management plan is to provide guidance and direction for the protection, preservation,and maintenance of the Clam Bay Natural Resource Protection Area(NRPA). This plan will form the basis by which future management decisions can be made by identifying the appropriate techniques necessary to achieve long-term sustainability for the natural resources and their uses within the Clam Bay NRPA. This plan,in addition to providing a brief historical perspective of activities undertaken within this system,will identify the management goal and objectives;allow for development of methods to achieve the goal and objectives;and summarize implementation,assessment,and evaluation strategies that strive to balance resource protection with recreational use. While the 1998 Clam Bay Restoration and Management Plan(1998 Management Plan)primarily focused on mangrove health and recovery, this plan will address all floral and faunal components of the NRPA. The plan will draw from the 1998 Management Plan,input from multiple interested stakeholders,and historical biological,hydrological, and physical reports to outline the goal and objectives for future management of the ecosystems throughout Clam Bay. The 2014 Clam Bay NRPA Management Plan(Management Plan)and any subsequent revisions recommended by the Pelican Bay Services Division(PBSD)shall be submitted to the Collier County Board of County Commissioners(BCC)for approval. Once approved by the BCC,this Management Plan,or future amendments to the plan by the PBSD Board,will supersede all others and will serve as the primary guidance tool for future permitting and other management activities necessary to protect, preserve,maintain,and monitor resources within the system. Development of the Clam Bay NRPA Management Plan Turrell,Hall&Associates,Inc.served as the principal consultant for the Management Plan. This consultant firm has a long history of work in the Clam Bay NRPA and was primarily responsible for the implementation of the 1998 Management Plan that resulted in the successful restoration of Clam Bay's mangrove forest. The coastal engineering firm of Humiston&Moore,Inc.provided input and monitoring data for the 2014 Management Plan relative to Clam Pass and the dredging design criteria. The PBSD Clam Bay Committee consists of members of the PBSD Board,which is an advisory board to Collier County's Board of County Commissioners. The Clam Bay Committee met regularly in 2013 and 2014 and provided input and direction to the consultants. Additional regular input was provided by representatives of several stakeholder organizations,including the Mangrove Action Group,as well as several interested Pelican Bay residents. All Committee and Board meetings were properly noticed, open to the public,and allowed audience participation. Input was also solicited via notices to more than 30 area businesses,government officials and employees,condominium associations,and individuals who regularly use Clam Bay. These representatives were invited to participate in two 1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 24 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 meetings held in the spring of 2013. Some have attended and provided comments at the regular meetings of the PBSD Clam Bay Committee where drafts of the Management Plan have been discussed. Stakeholders were also notified in April 2014 that a draft of the Management Plan was available on the PBSD's website,and they were invited to send their comments to the PBSD's office and/or attend a workshop about the Clam Bay NRPA Management Plan on May 14,2014. A list of these area people/organizations is included with this Management Plan(pages 48 and 49). Pelican Bay Services Division Turrell.Hall&Associates.Inc. - Chairman Tim Hall—Project Manager 801 Laurel Oak Drive,Suite 302 Arielle Poulos—Project Biologist Naples,Florida 34108 3584 Exchange Avenue (239)597-1749 Naples,Florida 34104 (239)643-0166 Humiston&Moore Engineers Brett Moore—Project Manager Mohamed Dabees—Project Engineer 5679 Strand Court Naples,Florida 34110 (239)594-2021 2 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 25 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Role of the Pelican Bay Services Division In order for the management and maintenance of the Clam Bay NRPA to be successful, coordination between a myriad of local, state, and federal agencies and interested citizens groups is required. The PBSD has undertaken that role for most of the past fifteen years. The Pelican Bay Municipal Services Taxing and Benefit Unit(MSTBU)is a dependent special district that was formed pursuant to Chapter 125 of the Florida Statutes and was formally enabled by the BCC pursuant to Ordinance numbers 90-111 and 91-22. These ordinances were replaced in 2002 by Ordinance 2002-27 which further clarified the role of the MSTBU and the PBSD Board. This MSTBU was created to,among other things,provide for the maintenance of conservation and preserve areas within Pelican Bay. This responsibility was undertaken diligently from 1998 to 2008 and resulted in the implementation of the previous 1998 Management Plan and the recovery of the mangrove die-off areas. Per action by the BCC,the responsibility for many of the monitoring and maintenance activities associated with Clam Bay was given to Collier County's Coastal Zone Management Department from 2008 to 2012. In 2013,the BCC returned responsibility for the monitoring and maintenance of the system to the PBSD via Ordinances 2013-19 and 2013-61. It is under the PBSD's direction that this current management plan has been written. While the MSTBU is a dependent special taxing and benefit district,the PBSD is an arm of Collier County government and makes recommendations to the BCC. The PBSD implements its defined responsibilities within the Pelican Bay community,sets its own budget and agenda,and regularly submits them to the BCC for approval. The BCC has commonly approved the Clam Bay management activities,dedicated funds towards those activities,and authorized the development of this Management Plan. The PBSD's effective working relationship with the BCC is expected to continue as the PBSD serves as the official manager of the 2014 Management Plan,which is consistent with Ordinances 90- 111,2002-27,2013-19 and 2013-61 of Collier County. The PBSD will direct the Management Plan and has the responsibility for its implementation and operation over time. As such,the PBSD will plan and implement defined management activities with BCC approval whose purpose will be to protect,preserve,maintain,and monitor the natural communities and ecological integrity of the Clam Bay NRPA. The PBSD has several attributes which make it a logical guiding force in the management and maintenance of Clam Bay. The PBSD: • is located within the Clam Bay drainage basin; • has an advisory board made up of residential and business members within Pelican Bay; • garners fiscal support for community projects,including Clam Bay NRPA activities,collected from local special assessments(non ad valorem taxes)of the residents and business members within Pelican Bay; 3 • October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 26 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 • is accessible to the public due to its local governing board and advertised public monthly meetings;and • has demonstrated a long-term commitment to the Clam Bay NRPA and a successful track record regarding its preservation,restoration and maintenance over the past fifteen years. These attributes give the PBSD the knowledge and expertise in matters of local concern and,in particular,the problems,opportunities,and interests of local residents as they relate to the Clam Bay ecosystem. Its relationship with the BCC gives it an additional level of access to technical expertise and oversight that will be necessary to assure that the Management Plan,as contemplated in this document,is fully implemented in the field. As part of its responsibilities,the PBSD will assemble and distribute various technical reports and assessments as required under the Management Plan,as well as coordinate with other public and private groups interested in Clam Bay. The PBSD is organized for and designed to maintain both its knowledge of the Clam Bay resources and to generate public support of the same. The PBSD will insure that the general public,residents in Pelican Bay,the PBSD consultants,and representatives from government agencies with jurisdiction over Clam Bay each have on-going involvement and input into the Management Plan. 4 immorm October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 27 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 2.0 Overview of the Clam Bay NRPA Description of the System The Clam Bay NRPA is a 570-acre estuarine system consisting of sandy beaches,Clam Pass,shallow bays,tidal creeks or tributaries,seagrass beds,and mangrove forests on the west coast of Collier County in Southwest Florida. The Clam Bay system is part of the Cocohatchee-Gordon River Transition referred to by the Collier County Department of Natural Resources as Coastal Zone II. It is one of the few remaining estuarine systems in the Cocohatchee-Gordon River Drainage System and the only coastal NRPA in Collier County. Historically the Clam Bay System was connected to Wiggins Pass to the north via a system of mangrove swamps and shallow creeks with intermediate open water areas that were excavated and are now known as Vanderbilt Lagoon(Collier County, 1994,Tropical Biolndustries, 1978). It is recognized that the connection was marginal at best and while passable at times,it was not uniformly and consistently navigable(Clam Bay Restoration and Management Plan, 1998). Connection to Vanderbilt Lagoon ended in 1952 with the construction of Vanderbilt Beach Road. Similarly,aerial photos of the Seagate Drive area taken prior to its construction show that Outer Clam Bay was connected to the mangrove swamps to the south via shallow meandering creeks and intermediate open waters leading to Doctors Pass. These creeks were only navigable by canoes and small skiffs(Turrell,2009). These swamps to the south were eventually excavated to become Venetian and Moorings Bays. The connection to Outer Clam Bay ended in 1958 when Seagate Drive was constructed. Today,the Clam Bay NRPA includes three primary bays,Outer Clam Bay(southernmost),Inner Clam Bay(central),and Upper Clam Bay(northernmost),connected by a series of tidal creeks and connected to the Gulf of Mexico by Clam Pass. The main creek system between the Pass and Bays is a multi-use waterway which at times sees swimmers,fishermen,boaters,canoers,kayakers,and paddleboarders all sharing the open waters of the waterways and the Pass. A canoe/kayak trail has also been permitted and markers installed throughout the system. The community of Pelican Bay abuts the northern and eastern edges of the system,while Seagate and Naples Cay communities abut the southern portion of the system. This system is an important natural and recreational resource for local residents and visitors. The Clam Bay system was designated a Natural Resources Protection Area(NRPA)by Collier County in 1995. The purpose of the NRPA designation is to protect endangered or potentially endangered species and to identify large connected intact and relatively unfragmented habitats,which may be important for listed species(Collier County, 1994). A timeline of important events that occurred within the Clam Bay NRPA along with a compilation of permits issued in and around Clam Bay are presented in Appendix 1. Clam Pass is a small,marginally stable inlet that has migrated north and south along the shore over the years. Prior to dredging,average water depths of Clam Pass were-2.5'to-1.0',and its width ranged from 30-50'(Collier County, 1994). The Pass remains the primary source of tidal exchange for the 5 Emmorimei October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 28 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Clam Bay system,but it is restricted by sediment deposits just inside the Pass and in the long Ver.6.4 meandering tidal creeks surrounded by mangrove forests. Mt -r a �,Xr•�,� it, !jr f 6,Teiljp� x ter' ::y yet„:7, , " '.5 ` "�+7} :Asi,,, t ♦ .. ..,....., ci. am Ste' S w+i;3�'/ 3 EIIr,'0 .♦ fs�fJ Y V1 s '°` kl cow � 2jhi r •�,e::h, C T 4, + air 01 *��"'' 8 i,�`'�, s r ,s� sI - Vis` rr �f , v• r r .. , r k e did s..' ..ITNi r.:, .. k,++� ,a i 4 r---1.,,..,- -\• 1,Ji . 1 art > t •: 5 r 0-4iri ' ,e i� .gaga.;,, OUTER N -9'i! 1 t,,:., s.:''.'17...i am .4.14, , _,... .. 71, +3 r i1 xwy1•f� � 'fl s.+se t7.1-Alf t �;y� g ,. fir. AAA � ......r Figure 1:Approximate extent o am :ay 'T' .oun.my. Clam Bay NRPA Vital Statistics Total acres:Approx.570 acres Beaches:Approx. 8,235 feet Beach Park:Approx.35 acres Mangrove: Approx.420 acres Seagrass: Approx.2 acres Open Water:Approx. 115 acres Latitude and Longitude of Pass:N 26° 13' 11",W 81°49' 01"Section,Township, Range:Sec.32&33,Twp 48S,Rng 25E,& Sec.4,5,8,&9,Twp 49S,Rng 25E Water Body Identification(WBID)3278Q1 6 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 29 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Adjacent Communities The Clam Bay NRPA is bound on the north by the Bay Colony portion of the Pelican Bay development; to the south by Seagate Drive,and the Seagate and Naples Cay developments;to the east by the Pelican Bay development;and to the west by the Gulf of Mexico and the Strand neighborhood of Bay Colony that is within the Pelican Bay development. Pelican Bay is predominately a mixed-use residential community consisting of private single-family homes,villas,and both high and low-rise condominium units. The community also includes a 27-hole golf course,common areas with meeting rooms,tennis courts,beach park facilities,emergency services facilities,and commercial areas with shopping and hotels. The 2,104-acre Planned Unit Development (PUD)and Development of Regional Impact(DRI)was approved in 1977 as a partnership between Collier Enterprises and Westinghouse Communities(WCI). It was one of the first developments in Florida required to save fragile coastal wetlands and associated ecosystems(Urban Land Institute, 1981). The development of Pelican Bay had a limited impact on the wetlands themselves with approximately 94 acres,including about 78 acres in the northwestern corner of the property,being developed. This left the majority of the mangrove forest intact and preserved around the bays. As mitigation for these wetland impacts,the 570 acre preserve area,including the 35 acre beach park,was donated to Collier County and eventually became the NRPA which is in place today. Development of Pelican Bay required a stormwater management system designed to spread runoff along the eastern edge of the Clam Bay estuary. A four to six foot high and 2'h mile long berm separates the developed portion of Pelican Bay from the estuary lying to the west of the development,but numerous culverts through the berm discharge water to a swale system along the eastern perimeter of Clam Bay. The eastern edge of Pelican Bay is about 12-14 feet above sea level at US 41,sloping in an east-west direction to about 2 feet above sea level near the berm. Six drainage basins operate on a gravity system to slowly move surface water into the receiving area of Clam Bay. Naples Cay is a high rise development consisting of 8 multi-story condominium buildings. The community also includes pools,tennis courts,approximately 33 acres of park and preserve areas,and two canoe and kayak launching piers. Construction on the first building in Naples Cay started in the late 1970's,and the last building was completed in 2002. Stormwater management is accomplished through several internal detention areas before water flows into Outer Clam Bay. The Seagate community is composed of about 80 single-family residences. The community was first laid out in the 1950's and still has a few undeveloped lots. Because development of this community occurred prior to stormwater regulations enacted in the 1970's,no community-wide stormwater system existed and septic systems were used for waste disposal. More recent improvements to the road and utility systems have allowed for some dry retention and sewer systems. Many of the homes within Seagate were built with boat docks along the community's man-made canals. Some homeowners keep motorized vessels at these docks. The 1995 Manatee Protection Plan acknowledges that access and use of Clam Bay by motorized vessels was limited due to the shallow nature of the bay and ephemeral conditions of the 7 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 30 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Pass. Vessels utilizing the Clam Bay NRPA waters are generally shallow drafted,and their access is limited by the day-to-day conditions of the Pass and connecting waterway. Clam Pass Park is a 35-acre County park providing beach access on the south side of Clam Pass. The Park is wholly contained within the NRPA boundary. Access to the Park is via a boardwalk through the mangroves from the parking lot at the very southern end of Pelican Bay. Operation and care of the Park is done under the supervision of the Collier County Parks and Recreation Department. Through an agreement between the County and the Waldorf Astoria Hotel,much of the day-to-day operation of the park is managed by the hotel. Historical Overview Prior to development,the entire coastline of South Florida would have resembled the Clam Bay ecosystem with meandering mangrove-lined shallow waterways buffering sandy barrier islands and natural terrestrial communities. Unique within the heavily developed coastal communities of Collier County,the Clam Bay estuarine system is a valuable resource for wildlife(particularly juvenile marine species and birds)as well as residents and visitors to the area who enjoy the low-impact recreational opportunities of the system. Within the Clam Bay system,four Indian shell ridges have been identified and indicate that this area was used for settlement by these civilizations. These ridges have been listed on the Florida Master Site Inventory as Clam Bay Shell Ridge,Inner Clam Bay Shell Mound,Brackish Hammock and Bayhead Camp(Hartwell,et al, 1994). Historically,Clam Pass was a small part of a coastal barrier island system of relatively shallow waterways and wetland communities extending from Lee County to Doctor's Pass. During the 1950's this system was isolated from adjacent mangrove lined creeks and bays by the construction of Seagate Drive to the south and the construction of Vanderbilt Beach Road to the north (see attached Exhibit, 1952 Aerial). The practical effect was to leave Clam Pass as Clam Bay's only connection to the Gulf. The Clam Pass opening has moved over its lifetime up and down the shoreline,influenced by major storm events and by man's alteration of the tidal prism and drainage basin that feeds the Pass. The shifting location of the Pass and its often tenuous connection to the Gulf is evident in the following series of aerial photos of the Pass over the past 60 years. Because of these conditions,the Pass is susceptible to outside events and can periodically close,which has happened six times in the last 25 years,most recently in 2013. 8 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 31 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 . 1400 7 • . 1 CLAM '� _ l PASS •Pq ` 962 V ,z , •-- CLAM ,• , PASS r:1 _ '.l' ' , *16 °L9 _ �9 � - 985 ! - , ! ; 44, CLAM I CLAM , PASS 1 `:, ° lr PASS �4 � ! . 19 z .,-, 12004 4 . ". 9 1 1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 32 of 83 CLAM BAY NRPA MANAGEMENT PLAN r Pelican Bay Services Division October 2014 Ver.6.4 111, CLAM111 PASS fi Figure 2:Historic aerials of the location of Clam Pass The health of the mangrove forest is directly related to the connection at Clam Pass. The exchange of seawater between Clam Pass and the Gulf is critical to the ability of the estuary to export organic matter,as well as to help regulate excess salt and freshwater. It also supplies oxygen-rich water from the Gulf and keeps metabolic wastes from accumulating in the sediment. A man-made water management berm now divides natural and developed portions where historically mangrove forest would have transitioned gradually into the mesic coastal hammocks and upland pine scrubs that made up the now-developed portions of the Pelican Bay community. With the development of the Collier County coastline,the Clam Bay NRPA has been protected as a managed natural system that preserves the essential features and ecological function of a mangrove estuary. The historical and natural events that have affected the Clam Bay system in recent times,along with governmental actions,scientific studies and management responses,are shown in timelines in Appendix 1. These depict the evolution of management activities in Clam Bay and provide the context for the management goal and objectives presented in this Management Plan. Mangrove Die-off and Restoration The first mention of stressed or dying mangroves within the Clam Bay NRPA came from the 1978 Tropical Biolndustries and Gee and Jensen report titled Carbon Flows in Portions of the Clam Pass Estuarine System, Collier County,Florida. Reports of stressed or dying mangroves continued through the 1980's and 90's. In 1995,a large area of dead and dying mangroves was documented encompassing approximately 42 acres adjacent to Upper Clam Bay(Turrell, 1995). By 1999,this area had expanded { to approximately 50 acres(Turrell,2000). 10 j 1 1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 33 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 The Clam Bay Restoration and Management Plan(CBRMP)was finalized in 1998 to address the mangrove die-off. The major objective of the plan was to restore the dead mangrove area through improvements to tidal flushing capabilities of the system,including enhancements to tidal flow into and out of the mangrove forest areas. This was accomplished through the dredging of Clam Pass and portions of the interior channels within the system,removing impounded fresh water from the die-off areas and the construction of a network of hand-dug flushing channels throughout the original die-off area and a few other areas exhibiting stress. In the fifteen years following the implementation of the CBRMP the mangrove forest has undergone a substantial recovery with over 90%of the original die-off area re-vegetated with new mangrove growth. Appendix 2 contains additional information regarding the mangrove die-off and restoration. 11 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 34 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 3.0 Physical and Natural Resource Description and Assessment NOTE: This section is repeated in appendix 4.It should not be repeated. It makes sense to keep here and delete the portions of section 4 that are repetitive and/or ancillary,not necessary,or could cause challenges, when the information is not needed for the management plan. !The goal and objectives of this Management Plan aim to manage and preserve each of the resources that make up the Clam Bay NRPA as a whole. The objectives of the Management Plan focus on natural communities,tidal and freshwater flows,water quality,archeological resources and recreational uses.( Comment[kJ.]:Don't think this belongs here as it is in the management section where it seems more appropriate and is repeatitive Soils Based on the National Resource Conservation Service(NRCS)"Soil Survey of Collier County Area, Florida"(NRCS, 1998)there are 2 different soil types(soil map units)present within the NRPA boundary:frequently flooded Durbin and Wulfert muck;and Canaveral Beaches Complex. These mapping units named for soil series represent the dominant undisturbed soils in the landscape that existed predevelopment. The unit descriptions do not recognize or appropriately interpret the drastically disturbed nature of urban landscapes created after the soil survey was completed. • ��a+tt* 'J�„`+'+zz ^�" _ 110-4.A,£7�s) fir,...,,, • � + c7tFl x� / t s ,:•••• 4140 99 93 , -- v Natural Communities In this Section,a natural community refers to the mix of plant and animal species that form the natural basis of the Clam Bay NRPA. A combination of factors,including geology,climate,topography,soils, wind,waves,storms and anthropogenic influences,determines the specific types of plants found in any given area. These plants are a major factor in what type of animal species that may be present,including threatened and endangered species that may utilize the Clam Bay NRPA. The Florida Department of Transportation's Land Use,Cover and Forms Classification System(FLUCFCS 1999)has been used to identify the plant communities found within the Clam Bay NRPA. See the attached Exhibits for an overall FLUCFCS map of the Clam Bay system and the existing monitoring plots within these habitats. 12 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 35 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 List of FLUCFCS Communities within the Clam Bay NiRPAI Comment[KW21:Missing freshwater marsh.In FLUCFCS CommunityDescription Upland or %of Clam BayTable l attached from Collier County Env.Service P P Div and Robin Lewis restoration project 1997 lists Code Wetland NRPA 23 acres of freshwater marsh some of which is west of the berm. 181 Swimming Beach Upland 5.95 186 Community Recreation Facilities Upland 0.40 _ 322 Coastal Scrub Upland 3.97 _ 428 Cabbage Palm Hammock Upland 0.45 510 and Interior Creeks and Bays(with and Wetland 23.16 540 without direct connection to Gulf or Ocean) 612 Mangrove Swamp Wetland 64.60 642 Saltwater Marsh Wetland 0.04 651 Tidal Flat Wetland 1.43 911 Seagrasses** Wetland 0.84** **included in the Bays(541)category Several other components of the Clam Bay NRPA ecosystem Including hardbottom,oyster,and other - Comment[KW3]:Table listing is out of benthic faunal communities are not specifically addressed in the FLUCFCS classification system. sequence with the text Additional historical information on the mangrove and seagrass communities are included as appendices to the Management Plan. FLUCFCS Code 181-Swimming Beach " • xT' 01 alb y• 1 # i 7,4 %tt 81 Figure 4:Beach habitat within the NRPA Boundary There is approximately 8,235 linear feet of beach within the Clam Bay NRPA in three distinct segments. Contiguous beach habitat extends from the NRPA habitat both north and south along the 13 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 36 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 coast. Shorebirds feed on marine invertebrates,such as coquina clams and mole crabs,at the water's edge,and beaches are a crucially important habitat for nesting sea turtles. This particular habitat has been monitored periodically in terms of width as part of the Collier County Beach renourishment program,though no conclusive statements can be made about the floral or faunal details of the ecotone over the years. Large-scale generalizations based on the annual aerial photographs can be made that the overall size,composition,and health of the habitat have remained relatively stable, and with the exception of the areas immediately adjacent to the Pass. Management concerns for the swimming beach are loss of beach area due to natural erosive processes and recreational over-use of the resource. FLUCFCS Code 322—Coastal Scrub S �� � i - .,� ! ► ..:--� .tom.-... � ., •� _. {e, "4:91r;�+' t ikej „ �._. Figure 5:Coastal Scrub habitat within the NRPA Boundary Landward of the frontal(beach)zone area is the back dune zone(also often called the coastal shrub or scrub zone). This portion of the dune is more stable,has greater organic matter,and supports less salt tolerant grasses and shrubs as well as some trees. Coastal scrub is represented by a conglomeration of coastal species generally found in a narrow band between an estuary and the beach. Many of the woody species found in coastal scrub are low growing due to low nutrient and droughty conditions of sandy soils. High winds and salt spray often prune the terminal buds of the trees and shrubs growing on the dunes and result in salt-pruned,windswept canopies. Species common in the coastal scrub zone of the Clam Bay system include:seagrape(Coccoloba uvifera),cabbage palm(Sabal palmetto),buttonwood(Conocarpus erectus)and Spanish bayonet (Yucca aloifolia). This is an important habitat as it helps anchor the back dune sands and provides habitat for several listed plant and animal species including the gopher tortoise(Gopherus polyphemus). 14 moo October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 37 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 The primary management issues of concern in the coastal scrub are gopher tortoise habitat management and exotic vegetation control. FLUCFCS Code 428—Cabbage Palm Hammock 'aYt, al - .b gat_ t c i ir' r , .;;-•,_ \ e ( ,, . Vt;'16.—*Z. .nae • V ' ♦ 7 7 - � u k i awe �i' + s,° i y P I ii Ist 428 - - 428 ' ; Figure 6:Cabbage Palm Hammock habitat within the NRPA Boundary This forested zone is composed of dune vegetation and is located inland of the coastal scrub-farthest from the Gulf of Mexico. The Cabbage Palm Hammock habitat consists primarily of cabbage palms (Sabal palmetto)and is found in sandy soils. In the Clam Bay NRPA it is generally found in pockets located between the mangrove forest and the coastal scrub zone or beach areas. The primary management issues for this habitat are exotic control and preventing destructive visitor access. FLUCFCS Code 510 and 540—Interconnecting Creeks and Bays(with and without connection to the Gulf) hS rpt r If .r ,,..; +0' v, .,, *" �,i'm, ' .slr,.fir .. e. : .,,, 1,,, 43 ., ,11, . lItrNr411641111111Ltis. e. 540540 Figure 7:Open Water habitat within the NRPA Boundmy 15 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 38 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 The Clam Bay NRPA contains the three larger bays associated with Clam Pass(Outer,Inner,and Upper)as well as the interconnecting shallow creeks and small open water areas. These bays and interconnections serve as the life blood of the estuary. These open water habitats serve as the basis for many other communities. Seagrass beds,oyster bars, clam beds,and other benthic communities can all be supported to varying degrees with the open waters of the bays and interconnecting creeks. Tidal creeks are passageways for fish and marine invertebrates between waters of the Gulf and the protected embayments of Clam Bay. Manatees,dolphins,and turtles may also use the Pass. Scouring action of the fast flowing tide generally prevents colonization of seagrasses and other benthic flora. Management concerns related to the bays and associated creeks include maintaining sufficient flow through them to accomplish flushing needs of the system,stabilization of the Pass without harming other components of the NRPA,and educating recreational users of the NRPA of the need to protect the shallow water habitats and the communities located therein. FLUCFCSJCode 612—Mangrove Swamp(Forest) tt' '",t yn'N : +: • 'n-a !:1,,, ,, ' T j_l -4-:-,,:- ` --..7,q. ^R..: ,,c -¢' .�✓. •."'"D�".* ik ,.r,i .t.• 4h Via'" d dr ) 1140'4 '4'' ' ' "7, I)„ .-Jsi2ensv . , Figure 8:Mangrove habitat within the NRPA Boundary Mangroves are salt-tolerant trees that grow in tidal areas of the tropics and are legally protected for their ecological value and function,such as: • Providing habitat for marine,terrestrial,and avian wildlife. • Protecting coastal areas from storm surges and coastal erosion. • Improving water quality by acting as a natural filter for land-based freshwater run-off. • Forming the basis of a highly productive estuarine food chain which includes many commercially valuable species. • Enhancing the atmosphere by absorbing carbon dioxide and reducing greenhouse gases. Approximately 65%of the Clam Bay NRPA is composed of the three most common mangrove species in Florida,namely red mangroves(Rhizophora mangle),black mangroves(Avicennia germinans),and 16 iimmumamememmi October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 39 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 white mangroves(Laguncularia racemosa). All three species have special biological adaptations to cope with salt and unstable,mucky,low oxygen soils that result from the tidal,hence continually waterlogged,environment. The dominance of mangroves in tidal areas is a function of these adaptations and their ability to out-compete other wetland plants. Tidal flushing allows nutrients to be distributed within the forest and provides for the transportation of dead leaves,twigs,etc. As this material decays,it becomes food for marine life. It is this mangrove detritus which is consumed by the many organisms at the base of the food chain which,in turn,creates the next level of the food chain necessary to support the fish populations that characterize the mangrove community. The Clam Bay mangrove community is composed of both riverine(along the creeks)and basin forest components. Riverine(Creeks)Mangroves On the waterward edges of small islands and the tidal creeks,passes and estuarine waterways that make up the Clam Bay system,a fringe of red mangroves can be found growing up to 25 feet in height. This zone can be just one or two trees in depth or extend Landward for some distance, depending on topography. The habitat provided by the prop roots of these red mangroves is of great importance to many fish and other aquatic organisms. Forests The majority of the Clam Bay mangrove habitat is low-lying basin forest where the dominant mangrove species varies between red,white,and black through the forest habitat. Portions of this forest community were affected by the mangrove die-off. The hand dug flushing channels were constructed throughout this community to increase the tidal flushing capacity through the forest and drain impounded freshwater out of the forest into the bays and tributaries. Special attention has been given to the mangrove community in the past because of the die-off which occurred between 1991 and 1997(though stress in the community was documented as far back as the late 1970's). The die-off affected black and red mangroves initially but eventually ended up encompassing some white mangroves as well. More details on the recent history of the mangrove management are provided in Appendix 2. Management concerns within the mangrove habitat include ensuring adequate tidal flushing, preventing freshwater impoundment,and protection from exotic vegetation or pest'infestations!. - Comment pcw41:Missing freshwater marsh section 17 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 40 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 FLUCFCS Code 642—Saltwater Marsh o'N d mi +1Aa ` at*�irfit .st-��n 1 gam..► F 1 Likkh `k~''1 5 og/if 642 Figure 9:Salt Marsh habitat within the NRPA Boundary At the interface between forested mangrove areas and the water management berm in Pelican Bay are depressional areas that have become colonized by aquatic freshwater plants,such as cattails(Typha latifolia),Carolina willow(Salix caroliniana),bulrush(Scirpus californicus),needlerush(Juncus romerianus),and leather fern(Acrostichum danaeifolium). Wildlife,such as otters(Lutra 'canadiensis),alligators(Alligator mississippiensis),various turtles,and wading birds can be commonly observed. These areas require regular maintenance to prevent the spread of nuisance and exotic plant species and ensure optimal functioning and interface between the natural mangrove forest and the water management system. Management concerns for this habitat are to prevent exotic vegetation infestation as well as ensuring appropriate water and salinity levels. Insert freshwater marsh fluccs code 641 (23 acres)see attached pdf page Fluccs code acreages for the Pelican Bay Drainage Basin FLUCFCS Code 651—Tidal Flats 18 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 41 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 11% r ry - •*• b) n� 1.'1'.'' Q cR Y ^v V44 11.4� • IOW .,. . 651 �. Figure 10:Tidal Flat habitat within the NRPA Boundary 19 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 42 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 The sand and mudflats of Clam Bay are rich feeding grounds for many species of fish and wading birds. These organically rich sediments support a variety of mollusks,worms,and invertebrates that scavenge detritus or,in the case of many bivalve mollusks,extend siphons at high tide and filter vast quantities of water. Birds,such as a variety of herons,ibis,egrets,and spoonbills pick through the sediment for the invertebrate food sources. The dredging of the Pass associated with the 1998 Restoration and Management Plan resulted in an increase of exposed tidal flats within the southern portion of the system. Increased tidal range resulting from the dredging allowed more area to be periodically exposed during the tidal cycle. Some of the area that had supported seagrasses prior to the dredging work were converted into the tidal flats by the increased range and reduced phase lag. Management concerns related to the tidal flats include the templates established for dredging, resultant currents that could be expected as a result of dredging,and frequency of disturbance. FLUCFCS Code 911—Seagrass Beds 7a WF�i" ) r / 1 t t:.: '..' :5. fir.i d 'vLT .1,-.1,1,1 - • ' i+�rt / +i y ! "ham .46 it 4 GRASS Figure 11:Seagrass habitat within the NRPA Boundary Several areas within the Clam Bay system host seagrass beds,specifically Outer Clam Bay and waterways just inside Clam Pass(Exhibits#`s??). Three species are commonly found in these Clam Bay waters:turtle grass(Thalassia testudinum),the largest with flat strap shaped leaves;the smaller shoal grass(Halodule beaudettei(fka wrightii)),with narrow,flat blades;and paddle grass(Halophila decepiens),with the smallest,paddle shaped leaves. Shoal grass is by far the most common though a small area of turtle grass has persisted since the 1998 dredging.Paddle grass is more ephemeral in nature,and diligence is required to be able to locate it. Seagrass coverage in Clam Bay has varied over time but is predominately found in Outer Clam Bay and the waterway between this bay and Clam Pass. A 1994 Collier County Environmental Services Division Comment pcws):The 2000 TH&A report's aerial photos (attached as report estimated seagrass coverage at approximately 10 acres. Pre-dredge surveys conducted in 1999 excerpts in pdf form). (Pages 14 estimated coverage at 5.13 acres(TH&A)Jan.2000 Baseline&Time Zero Report). Seagrass loss during and 16) illustrates the relationship between dredging 1 the period of 1994-1999 correlated with increased dredging activities that occurred during the same activity and loss of seagrass in I period of'Lim: - - --. :.- '• ••• : :•• Annual monitoring of sea ass the areas that were dredged. 20 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 43 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 beds along the monitoring transects has estimated coverage from approximately 1.2 acres in 2003\iertlfe4 current estimate of 2.85 acres from the 2013 survey. It should be noted that the coverage estimates are taken from along the survey transects only and do not account for other scattered grasses that may be located elsewhere in the system. Management concerns related to seagrasses include direct impacts due to recreational use and potential dredging templates,turbidity and water quality concerns related to flushing(too much or too little)and stormwater inputs,and algal infestations due to nutrient increases. A history of the seagrass monitoring efforts in Clam Bay is included in Appendix 3. Other Benthic Habitats Oyster Bars rtcrrie p ,,,m) • v: re ,kms • n — APPROXIMATE OYSTER LOCATIONS - Figure 12:Oyster locations within the NRPA boundary Oysters(Croassostrea americana)are filter-feeding bivalves,which were once common within the tidal creeks of Clam Bay(Humm and Rehm 1972). Deteriorating conditions,in part related to past dredging and clearing activities and closures of Clam Pass,are thought to have resulted in the disappearance of oyster bars in the system,though some reoccurrence has been observed to the south of the Pass in the last few years during seagrass transect monitoring. Oysters have been documented around the perimeter of Outer Clam Bay in past years'monitoring efforts. A 2011 benthic habitat assessment conducted by the Conservancy of Southwest Florida found living oyster clusters in the upper reaches of Upper Clam Bay(a single cluster),in the tributary between Outer and Inner Clam Bays(a single cluster),and throughout the shoreline of Outer Clam Bay. Management concerns related to oyster growth are similar to the seagrass concerns,namely protection from dredging,water quality deterioration and recreation. 21 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 44 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver.6.4 Other bivalve mollusks In addition to oysters,the 2011 benthic habitat assessment conducted by the Conservancy of Southwest Florida also found two other bivalves within the Clam Bay system. The pointed venus clam (Anomalocardia auberiana)and the stout razor clam(Tagelus plebeius)were both observed. Turrell, Hall&Associates,Inc.benthic surveys found several beds of southern hard clams(Mercenaria campechiensis)also present in the system. These mollusks are generally found within the shoal and tidal flat areas of the system and could be susceptible to impact during dredging or other disturbance operations. Management concerns would be protection from recreational users,water quality deterioration,and dredging. arm T, a-..? 9 A � � � 3 ., �iZ3-1'.›,-,. ..--.7k..,3-.„,”' t ..�TnF .�, ^9' ��-,�" �1 r, a �i �a.e tom;. ' '- �.f'fAcm.- , --1,, w' .._'ti a Figure 13:Exhibit from Conservancy of Southwest Florida Report Tubiculous Polychaetes Tubiculous polychaetes(tube worms)are typically the most abundant biological assemblage in Clam Bay and are primarily associated with muddy and sandy substrates.Polychaetes,including worm tubes and mud tubes,shell-encrusted polychaete tubes(Polychaeta)and trumpet worm(Pectinaria gouldi) tubes,are a vital component of the estuarine food web,providing key linkages between primary producers and higher trophic levels. Polychaetes create habitat and food for many organisms,such as mollusks,fish and even sea turtles. These worms are usually filter or deposit feeders that keep the substrate aerated and free of waste accumulation.Polychaetes tend to dominate Inner and Outer Clam Bays,with lower occurrences in Upper Clam Bay,the Lower Tributary,and,to a lesser extent,the Upper Tributary.Management concerns include protection from dredging,water quality deterioration and recreational users. 22 1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 45 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Hardbottotn Communities Ver.6.4 y*st • * _$i��p4��. , ti's' Y'6y 47ho .: ;6'1-'6" - ... OUTER ":A CLAM BAY INNER f rrt CLAM BAY �. 0410061000.000000.....t.:1 �,��RMI/1 .,.. . CLAN' • '0A .......:- PASS � Vezar Yong• ,-.. _ GULF O: MEXICO figure tar..ottom ommunetyo/-s ore o t e T T• .oun.ary Another important marine habitat marginally associated with the estuarine system is the hard bottom reef community found just seaward of Clam Pass. In about 10-15 feet of water a variety of sponges, stony corals,gorgonians,fish and associated invertebrates can be found within a system of rocks and ledges. Outcroppings of similar habitat type occur along the length of Collier County and are a little known resource of regional significance. Collier County has mapped this resource through side scan sonar surveys in 2005 and 2009 as part of its beach renourishment project. The landward edge of this habitat is located approximately 001 feet Comment[k6]:See attached report which said offshore from the Pass. the sandy bottom extends 200 ft after which starts the hard bottom 1995 clam pass....rpt Management concerns related to this habitat include recreation use and potential turbidity impacts resulting from dredging,beach renourishment or other management activities within the Clam Bay NRPA. Invasive,Non-native and Problem Species In an ecological context,an invasive species is one that is aggressive in growth and expansion of range and tends to dominate other appropriate native species. Its establishment and dominance can cause widespread harm to an ecological system by altering the species composition,susceptibility to fire and hydrology of an area. Non-indigenous species(i.e.,non-native or exotic species)are those that have been introduced purposefully or accidentally to an area outside their normal range. Category I species are those that have been documented to drastically alter natural communities by displacing native species. Category II plants have increased in abundance or frequency but have not yet altered Florida plant communities to the extent shown by Category I species. FLEPPC Category I plants observed within the Clam Bay NRPA boundary: Brazilian Pepper(Schinus terebinthifolius) 23 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 46 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division flrtnhor/01 Melaleuca(Melaleuca quinquenervia) Australian Pine (Casuarina equisetifolia) Beach Naupaka(Scaevola taccada) Earleaf Acacia(Acacia auriculiformis) Shoebutton Ardisia(Ardisia elliptica) Air Potato(Dioscorea bulbifera) Lantana(Lantana camara) Old World Climbing Fern(Lygodium microphyllum) FLEPPC Category II plants observed within the Clam Bay NRPA boundary: Coconut Palm(Cocos nucifera) Wedelia(Sphagneticola trilobata) Oyster Plant(Tradescantia spathacea) Mahoe(Talipariti tiliaceum) These species will be removed or reported to the responsible entity for removal. Listed Species 'State and federal wildlife agencies will review any proposed management activities within the Clam Bay NRPA to determine if impacts to listed species will occur. While there are many listed species (State and Federal)that utilize the Clam Bay NRPA,the six listed below have garnered the most scrutiny as being vulnerable to impacts associated with Pass maintenance activities. These,as well as other listed species that do or potentially could utilize the NRPA,are listed in Appendix 4. Smalltooth Sawfish(Pristis pectinata) Observations of smalltooth sawfish have been documented within the Clam Bay NRPA. Smalltooth sawfish are found in the tropical and subtropical Atlantic Ocean. In the western Atlantic they have historically ranged from New York to Brazil,including the Gulf of Mexico and Caribbean Sea. Habitat destruction and overfishing have succeeded in eradicating the smalltooth sawfish from the majority of its former range. Consequently,it survives in small pockets throughout its current range. The last remaining population in U.S.waters is off south Florida,a small remnant of a population that once ranged from New York to Texas. Mangrove Rivulus(Rivulus marmoratus) This small fish has not been identified within the Clam Bay system in previous surveys or field work but is typically found in mangrove swamps and could be present in the upper reaches of the Clam Bay NRPA. The mangrove rivulus is primarily a saltwater or brackish water species,with limited occurrence in freshwater. Within the Everglades and along Florida's west coast,this fish occurs in stagnant,seasonal ponds,and sloughs as well as in mosquito ditches within mangrove habitats. The mangrove rivulus is able to survive in moist detritus without water for up to 60 days during periods of drought,anaerobic,or high sulfide conditions. 24 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 47 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnh,r 7(194 Loggerhead Sea Turtle(Caretta caretta) Loggerhead sea turtles have been documented nesting on beaches within the Clam Bay NRPA. Loggerheads are circumglobal,occurring throughout the temperate and tropical regions of the Atlantic, Pacific and Indian Oceans. They are the most abundant species of sea turtle found in the U.S.coastal waters. In the Atlantic,the loggerhead turtles range extends from Newfoundland to as far south as Argentina. The loggerhead turtle was first listed under the Endangered Species Act as threatened throughout its range on July 28,1978.In September 2011,National Marine Fisheries Service(NMFS)and U.S.Fish and Wildlife Service(USFWS)listed 9 Distinct Population Segments of loggerhead sea turtles under the Endangered Species Act(ESA). The population in the Northeast Atlantic Ocean Segment is listed as endangered. The agencies are currently proposing Critical Habitat designations on several areas which contain a combination of nearshore reproductive habitat,winter area,breeding areas,and migratory corridors. The Clam Bay NRPA is contained within the LOGG-N-27 segment of this proposed critical habitat area. Gopher Tortoise(Gopherus polyphemus) Gopher tortoises and their burrows are found along the coastal strand portions of the Clam Bay NRPA. The range of the tortoise includes southern portions of Alabama,South Carolina,Louisiana,Mississippi, and Georgia as well as most of Florida. Piping Plover(Charadrius melodus) Piping plovers have been rarely sighted foraging or resting along the shoreline within the Clam Bay NRPA boundaries. No nesting activities have been documented within the NRPA. West Indian Manatee(Trichechus manatus) Manatees have been sighted on numerous occasions within the Clam Bay NRPA boundaries.Manatees can be found in shallow,slow moving rivers,estuaries,saltwater bays,canals,and coastal areas particularly where seagrass beds or freshwater vegetation flourish. Manatees are a migratory species. Within the U.S.,they are concentrated in Florida in the winter. In summer months,they can be found as far west as Texas and as far north as Massachusetts,but summer sightings in Alabama,Georgia and South Carolina are more common. Other Species Lists of plant and animal species that have been observed within the Clam Bay NRPA and the adjacent Pelican Bay development areas can be found in Appendix 4 of this Management Plan. These lists are not all-inclusive but represent a wide array of the species found within and adjacent to the Clam Bay NRPA habitats. 25 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 48 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nr•tnhor oma Hydrology Hydrological regime,sometimes referred to as the surface water or surficial hydrology,in simple terms describes the long term spatial variation in the water depths and period of inundation within a wetland system. This is because the surficial hydrology has both horizontal and vertical components and provides key ecological functions to the mangrove forest(Lewis,pers.comm.,2008). With respect to the horizontal component,incoming water(both tidal and surface water run-off)into an estuary brings with it nutrients,dissolved oxygen,and marginally lower salt concentrations. (Conversely,the outgoing water leaving a mangrove wetland removes some of the metabolic waste / Comment[KW7]:More documentation is that products(e.g.carbon dioxide and toxic sulfides)and excess salt. The vertical component refers to the wastes remain on site and only exit if saturation within the system is reached—i.e.we are over incoming water that percolates down into the sediment and root zone,and the sediment drainage,on a polluting it falling tide which removes metabolic wastes and excess salt.Vertical movements also include fresh or salt water upwellings,which have been documented in the northern terminus of the Clam Bay NRPA. The movement of salt and fresh water into and out of the estuary is critical to managing ecological functions such as salt dissipation and organic matter cycling'. It follows that anything that affects the Comment[Kws]:Freshwater is not an system and alters the ability of the system to perform these functions,will,in most instances,cause ecological function it is a necessary component of the estuary. (stress to the system and,at some point in time,result in the death of the system or portions of it. Hydrologic studies indicate that the tidal flushing capacity of Clam Bay prior to the restoration dredging was limited and almost insignificant in Upper Clam Bay. The preliminary hydrographic assessment of the Clam Bay system prepared by Tackney&Associates,Inc.(August 1996)demonstrated rather dramatically that there was a significant reduction in tidal range in Inner Clam Bay. Tackney described the flow in that area as"measurably reduced"and"very inefficient". The connecting tidal creek between the Pass and Inner Clam Bay is the key conduit for tidal input and outflow to the northern reaches of the Clam Bay system.Its constriction and the ancillary constriction of tributaries connecting to it impact the quantity and quality of the flushing that can occur in Inner and Upper Clam Bay. Another key aspect of the surficial hydrology is the vertical location of the water level elevation relative to the sediment elevation. Specifically,the mean low water(tide)elevation has to be sufficiently lower than the sediment elevation in order for sediments to drain during low tide. A persistent high surface water elevation stops sediment drainage and results in anoxic sediment and the accumulation of toxic waste products. The absence of meaningful exchange was certainly a contributor to the significant degradation of the mangrove system within Clam Bay. (Tackney 1996;Lewis pers. comm.,2008). In this context Tackney observed that,even in the absence of rainfall,the average water surface elevations for the inner and upper bays were higher than the average surface elevation for the Gulf. Analysis of the tidal data indicated that average water surface elevations in the Inner and Upper Clam Bays were both elevated above the average Gulf water surface elevation by approximately 0.2 feet.This indicated that the tidal range in Inner and Upper Clam Bays was muted and that the system was receiving significant additional water through runoff and restricted capacity to drain additional inflow. In fact,in portions of the Tackney study no tidal fluctuation was noted in the Upper Clam Bay and only 26 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 49 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division llrfnhcr 7n14 marginal tidal effects were observed in Inner Clam Bay. The reduced tidal ranges were also accompanied by relatively large phase lags. The phase lag is the average time delay measured in hours and minutes between the occurrence of slack(high or low)water in the Gulf of Mexico and the measurement stations. It is affected by both the distance between measurement stations and the amount and quality of hydraulic resistance of the connecting channel. The longer the distance and the higher the resistance,the more pronounced one would expect the phase lag to be. In the upper bays,high and low waters generally occurred over three hours later than the Gulf tides. These conditions indicate that the tidal creeks connecting the interior bays are hydraulically very inefficient. As a result,the upper bays are prone towards extended periods of flooding as a result of freshwater runoff and the inability of the system to drain efficiently. During Tackney's field studies of May 1996,rainfall of approximately 4 inches in three days was adequate to flood the Upper Clam Bay above high tide levels and sustain this flooded condition for over two days. Accordingly,he concluded that the creeks and bays that serve to connect the Inner and Upper Bays were significantly less efficient in the ebb tide stage than they were in the flood stage. Studies undertaken by both Lewis Environmental Services,Inc.and Turrell&Associates,Inc.would support this conclusion(Turrell, 1995). Finally,an additional attribute of the system that is directly related to tidal prism and the quantity of inflow and outflow is the question of inlet stability. Inlet stability refers to a tidal inlet's capacity to adequately scour out deposited sediments and prevent inlet closure. For a given wave environment, inlet stability is governed primarily by the volume of water(tidal prism)carried by the inlet. To remain stable,an inlet must have the characteristic that a temporary constriction in cross-sectional area produces an increase in current velocities adequate to scour out the constriction. To function without mechanical intervention,the system must generate a sufficient volume of water on the ebb tide to scour out the inlet naturally,otherwise the inlet will,over time,continue to close. This is particularly true during periods of high wave activity and low tidal ranges. (Turrell 1995;Tackney 1996). The six closures of Clam Pass that have occurred in the past twenty-five years indicate that stability of Clam Pass is marginal. (Turrell 1995;Tackney 1996,Humiston 2010). Since implementation of the 1998 Management Plan,the hydrologic conditions of the Clam Bay System have improved considerably,resulting in the restoration of the mangrove forest. 27 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 50 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rirtnhcr 7f17d Freshwater Component Under predevelopment conditions,much of the area's rainfall was held on the surface of the land in sloughs and other low areas. This water would either slowly filter through the soil to recharge the shallow aquifer or move through the mangrove community to the bay. Less than ten inches of the approximately 53 inch average rainfall is estimated to have been lost from the uplands east of Clam Bay as surface runoff. The storage capabilities of the land thus moderated surface flows,preventing extremely high flow rates during the rainy season and serving to maintain surface flow and groundwater flow during the dry season(FDER 1981). The development of Pelican Bay had limited fill impact to the Clam Bay system,but it did modify the pattern of freshwater entering the Clam Bay system(Wilson,Miller et.al., 1996). The surface water management system as designed,permitted,and implemented at Pelican Bay employs a series of detention ponds,swales,and culverts to regulate the discharge of run-off into Clam Bay wetlands. Discharge occurs almost continuously along the eastern perimeter of the conservation area. Run-off from the northern end of Pelican Bay is collected and discharged into Upper Clam Bay. In 1996, irrigation water for 27 holes of golf and landscaping in Pelican Bay was approximately 3.0 MGD, which approximates 26 inches per year of additional rainfall equivalent(Wilson,Miller et.al., 1996). According to the report the irrigation water was added to the average rainfall for South Florida(—53 inches/year),yeilding an effective rainfall of approximately 80 inches plus annually. This is significant,particularly when viewed in the context of predictable storm events that have the potential for altering the amount of average rainfall entering the Clam Bay system. The"Pelican Bay Water Management System—Stormwater Detention Volume and Water Budget Analysis"(Wilson,Miller,Barton&Peek,Inc.April, 1996)describes the water management system as being divided into six watershed or drainage basins. Rainfall and irrigation either seeps into the ground or runs off into surface water management retention or detention areas for gravity drainage westward to the earthen dam(berm)through weirs that control discharges into the wetland..The surface water detention plan for Pelican Bay has a standard,permitted design capacity to hold the first inch of stormwater during a 25-year storm event. The surface water management system was designed such that the post-development surface water run-off rate does not exceed pre-development rates.Stated differently,the system is designed to discharge surface water in the development portion of Pelican Bay in the same manner that it discharged surface water prior to development. Stormwater runoff from an additional 130 acres of watersheds,outside of Pelican Bay, contributes a supplementary and significant volume of discharge to Clam Bay,representing an estimated 7.9%of the total stormwater discharge to Clam Bay(REF WHERE GOT 7.9%FROM). 28 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 51 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nrrnhor')ni d a N� Viii(i I -;,fay s n `r 7Z::::";7172":"7:,.u*{, nh ,1 tro - r t, z ..' T� .,„'V 3y_ y ,y .R4 1rlx 1 -4 s r ` ., t ` t , sa t I ,.Iii p w� i%�. � �! \ ,n -'' 169, �, j::�. + fi i'�ly*. +tb�Y; ,'bifr y '.nr at t,. a .I a,T � , ,-,..-1-4; +' ' >.. BASIN 3 't'1`* BASIN 2 t t*?' 'I _±1�1 A�,a ,�?, . 1�,4,,�E4" t :•' -'-,'iji,'•- u, o- ..a/wer BASIN t t+t ;v2..�C ,5 ,, ' , '✓� tQ9, '...?--",",..-,1"41 �.a 1't" ' -•-/ f" .ASI"PP .1.% <. Iv E,.SII,5 )„ . „. ,t,' `,4,_,,,.--,LL ' '::r - s.t 1. Figure 15:Approximate locations of Drainage Basins within the Pelican Bay Development(photo is oriented with north to the left and west down). As the area of Pelican Bay to the east has undergone development,it has increased the impervious surface area,with a concomitant increase in surface runoff,which is eventually discharged to Clam Bay wetlands. The daily irrigation water volume enhances the saturation of the uplands which reduces their ability to accommodate rainfall volume,thus effectively increasing surface and groundwater discharge. Groundwater discharge can be commonly observed throughout the eastern side of Clam Bay and is discernible as a very slight sheet flow. Where this water encounters a discharge system,even one that is not operating at peak efficiency(from an engineering,not historical,standpoint),such as Outer Clam Bay,excess water is effectively removed from the system. However,during the mid-1990's in the northern section of the black mangrove forest,sheet flow and stormwater runoff was not being efficiently removed due to lack of flow through the forest and anthropogenic impediments to the westL ;— Comment[KW91: there is documented evidence Freshwater accumulated within the mangrove basin,increasing soil saturationand raisingthethat the strand road impedes underground flow to mean and from the gulf of mexico water table elevation above ground level causing water impoundment,and overwhelming the black mangrove's anaerobic soil/gas exchange mechanisms. The construction of hand-dug flushing channels in the mangrove forest,undertaken as part of the 1998 Clam Bay Restoration and Management Plan, alleviated freshwater impoundment and allowed mangroves to become reestablished throughout the die-off area. Inlet Dynamics Clam Pass is a small inlet on the southwest coast of Florida that provides a tidal connection to approximately 570 acres of wetland preserve in the 570 acre Clam Bay NRPA. The relatively small tidal prism of Clam Bay provides a critical balance between tidal flow in and out of the inlet channel and littoral processes moving to the inlet. This affects the inlet hydraulic efficiency over time,especially 29 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 52 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtr h,r')r11 when littoral transport rates are high due to periods of high wave energy. 30 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 53 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division frtnh,r 7n1 a The morphologic features of a tidal inlet include ebb shoal,flood shoal,and inlet channel. The flood shoal includes the sand shoals on the bay side of the inlet channel. The flood shoal is less dynamic than the Gulf side of the inlet as it is influenced mainly by tidal flow and sheltered from the varying wave conditions on the open coast side. The ebb shoal features can be explained as a sand bar forming a delta on the open coast side of the inlet. The ebb shoal delta shields the inlet channel from waves and provides pathways for sand transport along the coast to bypass the channel without shoaling the inlet closed. 1 X . Ilett \p 113 Figure 16:Ebb and Flood Shoals.Figure provided by Humiston&Moore A stable inlet system requires an ebb shoal feature that prevents rapid shoaling at the inlet mouth. The inlet channel maintains its flow cross-section through tidal flow that scours the channel,while the waves are moving large amounts of sand along the coast. The stability and dynamics of a tidal inlet are based on the balance of the two forces of tidal flow versus wave-induced current and sand transport. The direction of wave action plays a significant role in the shape and dynamics of the inlet features. Clam Pass is marginally stable but subject to shoaling,and therefore requires regular monitoring to determine if dredging is needed. The relatively small bay area compared to other estuaries in Southwest Florida provides adequate tidal flow to keep the Pass open under typical conditions. The narrow nature of the flood shoal area surrounded by the mangrove forest limits the flood shoal capacity to maintain an equilibrium volume and bypass additional sand to the Gulf and bay waters. The accumulation of sand over long periods of time,especially within the flood shoal and inlet channel, creates additional resistance to flow. This additional resistance causes a reduction in the tidal range within the bay system and consequently reduces the flow through the Pass. If this occurs,maintenance dredging to restore flow rates may be needed. 31 1 _ October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 54 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division /lrtr,ha,r'?nhd During the 1990's Clam Pass was subject to channel migration as well as closure,and dredging was necessary to keep the inlet open. In 1998 the Pelican Bay Services Division developed the Clam Bay Restoration and Management Plan that was approved by the Collier County Board of Commissioners. The purpose of the plan was to address the mangrove die-off by improving tidal flushing into and out of the mangrove forest areas and drain excess freshwater trapped within the mangrove forest. This was accomplished through the dredging of Clam Pass and portions of the interior creeks within the system, as well as the construction of a network of hand-dug channels throughout the original die-off area and several other areas that were exhibiting stress.Hand-dug channels often cut through root systems of mature mangroves to reach the die-off areas.This action ultimately resulted in uprooting and killing several trees as they could not withstand tropical storm winds due to destabilization caused by the hand-dug channels.While installation of the hand-dug channels assisted in die-off recovery,they also resulted in the death of several mature Trees[ - Comment[KW1o1:Don't just say the good this - was a lesson learned The implementation of the Clam Bay Restoration and Management Plan resulted in a significant increase of the tidal prism compared to conditions prior to 1999 and the eventual recovery of over 90% of the original mangrove die-off area. In addition to the 1999 dredging,dredging occurred in 2002,2007,and 2013. The 2013 dredging took place following inlet closure in late 2012 after the passage of Tropical Storms Debbie and Isaac and high-energy wind and wave conditions. The inlet was reopened in April,2013 and tidal exchange between the bay and the Gulf of Mexico was restored to near design levels. Water Quality During the initial environmental permitting of Pelican Bay,the agencies required water quality testing within the Pelican Bay subdivision and the Clam Bay estuary to help evaluate the impact of development on Clam Bay. The water quality testing program was first implemented by the Pelican Bay Improvement District(PBID)starting in the early 1980's.In 1990 the PBID became the Pelican Bay Services Division(PBSD),a dependent Division of Collier County. The PBSD continued the testing program after 1990. The PBSD is currently the responsible entity for the testing program. The water quality testing has been performed at several sample points within the Pelican Bay surface water management areas and within the Clam Bay estuary. The historical sample point locations are shown on the Figure 17 on page 31. The sampling locations included 5 locations within the open waters of the system and 4 locations along the surface water management berm. Sample points W-7(located in the creek near the north Pelican Bay Foundation boardwalk);W-6(located in the creek near the south Pelican Bay Foundation Boardwalk);W-1 (located near the kayak launch area at the southern end of Outer Clam Bay);North Seagate(located on the north side of the Seagate culverts between Venetian Bay and Outer Clam Bay);and Upper Clam Bay(located at the very north end of Upper Clam Bay)are within Clam Bay,and are categorized as Class II waters by the Florida Department of Environmental Protection(FDEP). The remaining four sampling points are PB-13 (located north of the Sandpiper parking lot on both sides of the berm);PB-11 (located between the St.Maarten condominium and the Commons on the east side of the berm);Glenview(located between the Glenview and Stratford 32 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 55 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division Ortnhor 1(11 d condominiums on the east side of the beim);and St.Lucia(located adjacent to the St.Lucia condominium on the west side of the berm),which are located in the surface water treatment portion of the property(Class III waters)within Pelican Bay. 33 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 56 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay ServicesMEDivision p tlrtnhor 7111 CI .*;.'1," gi i i . - 64,,,A, .. •-....,„4-,- .... --..24 , ,_4 � + r. y, I �ii��0'At�f�r .�1.,,'-..;- � r�+�4 l'.41444,.... �\: d d '. , rq f ,� 'Fry yir. j'l.:764:-.,171,3 ' 3 •Y r 1 4f}Yt ``l{I -1-:-."•,,--:----, t w.r4 CLA55l,Sh4!FL1Nv LOCA PONS rf{S el el •,;A*CUSS 111 SAUPUNC LOCADOAS y` T` i 4 ki " 2M 9 „2yX NLtdi&ZoltlleJT.#d f� �,I tY�,\jtab . , le 115,,,,,S.-,,..,..i,....,4,;:it, r,--,, ,.,,o. • \ rt T f�, , ` -..btu \ 'Y 1,1 ' , b K IA moi. `k• , -1:1*R .r'.....1.14r i•i I. n,.f t7 GLENVIEW ks .` ify } Y �, x r" • 4A,' A k • • s i2C r} � .' t' c + .. 44.1.: '1,...g,l'',,iill.f.t.;%. 1" VAS"l'Alb;*i i-.**7"*;*' low CM" Gt a$1�Al:PAdC l ,�•'�. :N •"s '- ..s�i& yL '¢ ym .I Figure 17:Historic Water Quality monitoring locations within and adjacent to the NRPA Boundary 34 1 i i 1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 57 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division Orinhar/r11d Water quality sampling is conducted within the Clam Bay system on a monthly basis. The samples are collected by PBSD staff and transported to the Collier County Pollution Control laboratory for processing. Parameters sampled and collected,include: • Field pH • Field Temperature • Field Salinity • Field Dissolved Oxygen • Ammonia • Carbon—Total Organic • Chlorophyll a • Copper(added to the parameter suite in 2013) • Nitrate-Nitrite(NO3-NO2) • Nitrite(NO2) • Nitrogen—Total Kjeldahl • Orthophosphate(OPO4) • Pheophytin • Phosphorus -Total • Residues—Filterable(Total Dissolved Solids(TDS)) • Silica(Si02) Water quality sampling results of nutrient loading seem to indicate that Pelican Bay's surface water management system is doing its job. No evidence of nutrient loading has been observed within the Class II waters though several spikes and elevated nutrient(nitrogen and phosphorus)levels have been observed from the testing locations along the berm. It is believed that the spikes were correlated with fertilizer application within the community. Water quality sampling within the Clam Bay NRPA in 2011 and 2012. Based on these sample results, FDEP made an initial determination that Clam Bay could be impaired for both dissolved oxygen(DO) and copper. As a result of coordination between FDEP,Collier County,Pelican Bay Foundation,and involved consultants,FDEP made a determination that the oxygen levels in Clam Bay were natural,and the system was not listed as impaired for DO. During the last several years Collier County and Pelican Bay Foundation consultants worked with FDEP to develop site specific alternative criteria(SSAC)for total nitrogen(TN)and total phosphorous(TP). These site specific alternative criteria are now included in the State's adopted water quality standards in the Florida Administrative Code Chapter 62-302.532. The determination of whether or not the sites'nutrient levels meet the adopted criteria is based on an analysis of the relationship between TN and conductivity and/or TP and conductivity. 35 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 58 of 83 ) 1 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division llrtnhar 7n1d FDEP did determine that the Clam Bay System was impaired for copper and placed the Clam Bay system on the Everglades West Coast verified list for copper with medium TMDL priority (5 to 10 years for TMDL development). TMDL(Total Maximum Daily Load)is defined by the FDEP as the maximum amount of a given pollutant that a surface water can absorb and still meet water quality standards. Subsequent copper testing undertaken by PBSD has also shown periodic elevated levels of copper within the Clam Bay Class II waters. Beginning in 2015 PBSD's water quality monitoring program in the Clam Bay NRPA system will employ the sampling program used to establish the SSAC atn" ` locations within the comment[kii1:The correct term is site specific open waters of the NRPA will be increased and relocated from the 5 historical locations to the 9 alternative criteria and the acronym used is SSAC locations subsequently established. These 9 locations are shown on Figure 18. Sampling will continue to be collected on a monthly basis. The suite of parameters collected and analyzed from the water samples will also be amended as outlined below in order to provide the information necessary to more easily interpret compliance with the established SSAC. • Field pH • Field Temperature • Field Salinity • Field Specific Conductance • Field Dissolved Oxygen(mg/I) • Field Dissolved Oxygen(%Saturation) • Ammonia • Chlorophyll a • Copper • Nitrate-Nitrite(NO3-NO2) • Nitrite(NO2) • Total Nitrogen • Orthophosphate(0PO4) • Pheophytin • Total Phosphorous The PBSD is developing an improved surface water management program.that is designed to reduce nutrient and copper inputs into the surface water system. Once completed,this program will be reviewed by FDEP.Once FDEP is satisfied with this plan and implementation results in copper reduction,Clam Bay could be removed from the impaired list. 36 Ospaucgbtoembi5ett9re2d08fb,8y230K1a4thCylwamorBleayy Committee of the Pelican Bay Services Division CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division flrtrthor 7n1 a ,. • .. .!. , ,,‘•.,i';., 4.."-!"..*.--17.* 10.*:"...4:„. •..... . : \,„,,:: ,.:,-. .44.., :----,:; , i — „140,,.. ---, . '1' 1 ' ;;;$ . oiitieieg7--; -NZ$?;,,10 1 1-4,-..q. ,,,,-.4yfilik.t.-., ---43 ,,,,,,,t4 .....,, , ._ „„...„,-.,,,.., ,i.......,.. -.,, ,....‘,, ' — T? ,. V.' Oit.--:,-,;:.242fttS°40-44014.?(Zi' t,,,, 3 ,.. L-... ' A .*g , 1 UPDATED LOCATION el NRPA 4 C'Ll 'lk;° MATED LOCATION AW ',ACS' TO NAPA , 816 .0.41 fila "a ,14,14'' ' • ,0 NOEXISTING LOCATION ANAChct I I, ' .\ 1- : 95° e.-- ,b.k.,8;141.11311 4.'„ ii.pe,•.,,„*...t4:2,,,,* I Pi' ,!!!4' .. ,., . .a. . • - ,ffim-e-spr ;0t4'4\151 tit.44a . , 1-42,,,,,,,,:v. ,..',.,-cl %.. • _ .i. - -%-..04.7...,...44 .t.t 1, i. ii,-, „;r;:ia ' ;;i: 0,'''L'' j 54A-- \ -""--c""''0;#1211.". .1.4itif""i, :' -'''' "• 1 °411041.4:1::-.41: ,,,, -':' .N..,... .tw; ,,,,.,..!,!,15 - '''ti"Ott;0111#i .. \,-F,' 1,,,, -_...,, , ..,.... ..) •41 = '. ' 'i'''' ''' t,a... 4. '''.. ;kV A2i V.26 2.2657%, • -,1*,*`-tzliki• i: 14.;...i• . ‘, :-,,,. '.; ='•:', '-iY.....,,f,liti ' '-— 01Ziki.;.,481 312835,', A.,:.:,`it-40.1..rii .1. .; ' i) tl '°,1.,.41, lit•r`..4V 1' - ' •-,, If ,, • t.I ' '' .. 7 - ''}... -';'• ' . ,A e. ....-.., .1•,.'4,,N(ki .,. .r.or• - • Or- PO4, ' . ,iw ft,1,-.."4.7.:;04.4 •.4 . 't ' i .. INV..4 ,/,'9,-te .. -\....'',, ,,•,.- ,411_‘ 17. ttt SO,•,."„'„°,,,,,,p , . 2.6;.z..:3?,59:1". • .,•,',,,,..:).1-V5,,,, . . ZIZWAPI•91:1e.urd 4j '''-',"i:' ':.-',7'.•-;',,--. ' il: ,.. AZ ... : -41\,..... I- • :;i:r`-''4' .---..•'.. 1 . ''' "---m,:- :'' "" --,,‘ ) -... ' -,,...."-;,',!..t: . ', 1,,,'-4,,./..-' . 21 ,* ...--.1-3.;.. t-- -,.-,- .tie ii.i6:fi61251t.0,- I. .z..0, ,.. 1 ' Ill ,II,. ;lii.0-1251%;....•" '''Ir-'61'6, :1 '.sti"\:- ••2..-''''''.5,•." -''. ,,,f4. .4\ '''' -.. r-. '''' r-''./...sr.,N, •::, ___„„...k,'.„ . ' ,‘Lt..?'".At4sItvCrti, "It e' 1 '''i t+ ;,.. ‘,i3. .''' •.,,,GLENitiew ,r4p 7 ,,- ,.4- ii '•:t e..• : :.'.. :1 tc..3,:., .-..4f. o.:'.t, 3:',!:.04 . , i jir:Nil'...,-_,...- ,' =...,,•, Aq:,,.t.--,-. ,C:. , ----"-....",--_,,---,;-,,-4•",...-,'..'„;-1/4,,:..'-.,'.1.',,;'''''.',',.-.'k,.-,L.-'.-..','-•,:,^•.,.,i.,'.,-..,-1:,"t%'',I•'.41-' irg,4. t 262100 ! •: -.---1a:•--.,'-*i,-1 I 4i. F ,'.;l . . / " ".? 1rt ,7oT „ 3 2621D „- X--.--:--s".'"s'- ''.- :..-7,71's'ilt:1:•le:.`t 7 ._ .' ‘,.ii;i'4' .• "i.,--_,,,-;-7,, ,,'.f ;,.....*:..-4',‘',--,4''''' ”, stt - t . • - Figure 18:Proposed GVater Quality monitoring locations within and adjacent to the NRPA boundary 37 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 60 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nrtnhor7nl4 Archaeological Resources The Florida Division of Historical Resources Master Site File lists known archaeological sites within the Clam Bay NRPA boundary.The four sites are located within the Clam Bay NRPA.Three are located within Ihctmangro:e forest habitat. TWO of th sit s(CR476-"n'CR547)arc located north of comment[KW12]:See hartwell et al 1994 • - -. descriptions and locations as there have been some e. c. • • .. discrepancies on this service). Site CR476 is identified as a prehistoric campsite and shell midden possibly supporting the use of several cultures dating from 8500 B.C.to A.D. 1700. Sites CR547 and CR576 are identified as shell middens which were in use between 100 B.C.and A.D. 1700. Recreational Use The Clam Bay NRPA provides a variety of opportunities for recreation. The main creek system between the Pass and the Bays is a multi-use waterway which at times sees swimmers,waders, fishermen,boaters,canoers,kayakers,and paddleboarders all sharing the waterways and the Pass. Many Collier County residents and visitors enjoy the natural environment of the preserve. Recent stakeholder input,as well as prior reports,supports the use of the Clam Bay NRPA for low-impact recreation. It is important that all who participate in recreational activities within the system do no harm to the flora,fauna and water quality of the Clam Bay NRPA. Clam Bay's dense forest of mangroves limits walking in the preserve. Most walkers seeking to enjoy the rich natural environment of Clam Bay use the three boardwalks that cross the preserve and provide access to the beach. Residents and guests of Pelican Bay use the northern and middle boardwalks. The southernmost boardwalk is open to the public and accessed from the parking lot at the south end of the system. Trams are used on all three boardwalks to transport those choosing not to walk on the boardwalk to the beach. Fishing and swimming are popular pastimes. Fishing can be done from the boardwalks and canoes or by wading into the water. Swimming is usually confined to the beach areas,but some swimmers and waders,if conditions permit,venture into Clam Pass. Shell hunters,joggers and sunbathers are also familiar sights along the shoreline. Kayaks,canoes,and paddleboards are used by those wanting to enjoy the natural setting and serenity of Clam Bay's waterways.There is a public launching area for non-motorized vessels adjacent to the parking lot at the south end of Outer Clam Bay. There is also a launch area for canoes and kayaks for Pelican Bay residents on the northern boardwalk.The canoe/kayak trail is clearly designated by canoe trail markers from Outer Clam Bay to Upper Clam Bay. 38 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 61 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhor 7n1d Instances of disagreements towards boaters from swimmers not understanding the mixed-use aspects of the waterway and potentially unsafe motorboat operation have been occasionally observed. Ongoing education will continue to indicate the mixed use-aspects of the waterway. If necessary, County Ordinances or other management measures will be sought to promote safe and environmentally suitable utilization by all residents and visitors. 4.0 Management Plan Goal and Supporting Objectives The following goal and supporting objectives for the management of the Clam Bay Natural Resource Protection Area(NRPA)were developed in accordance with the directives of the Collier County Board of Commissioners(BCC)and the Pelican Bay Services Division(PBSD),which serves as an advisory board to the BCC. The goal and supporting objectives were formed in conjunction with stakeholder input and are based on the management issues present in the NRPA as well as the purposes for which the land is held in public trust. The Clam Bay NRPA requires active management to ensure its long term health. The goal and supporting objectives set forth in this plan should not appreciably change over time,but management techniques and strategies may be modified to appropriately manage the NRPA. Annual reports documenting the results and analysis of all monitoring activities over the course of the previous year will be completed,and the results presented at one of the PBSD's announced monthly meetings. The ability to implement specific objectives of the management plan is dependent upon available administrative and financial support. Therefore,activities will require prioritization to remain within available funding. Management strategies will be reviewed annually and adapted as needed. GOAT The goal of the Clam Bay NRPA Management Plan is to establish the basis for management activities that will be undertaken to protect the health of the Clam Bay NRPA estuary. Objectives to support this goal include: 1. Maintain and protect the nativefloral and faunal communities within the Clam Bay NRPA 2. Ensure the estuary has adequate tidal and freshwater flows to maintain ecological health within the Clam Bay NRPA 3. Monitor and maintain water quality within the Clam Bay NRPA 4. Monitor archaeological sites within the Clam Bay NRPA 5. Ensure recreational activities are environmentally compatible within the Clam Bay NRPA These objectives were formed to allow for adaptive management,whereby the compilation and analysis of all data will occur holistically and provide direction to adjust strategies to better achieve the goal (Flowchart 1). 39 1 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 62 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rlrtnhar 1111 INSERT FLOWCHART 1 DELINEATING GOAL in RELATION TO THE OBJECTIVES 40 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 63 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division flrtnhor?n1 d Objective 1—Maintain and protect the native floral and faunal communities within the Clam Bay NRPA This objective is focused at ensuring natural resource protection and long-term sustainability by incorporating, evaluating and prioritizing all relevant information about the estuary into a cohesive management strategy that allows for recreational activities within its boundaries,while protecting the long-term health of the ecosystem and its natural and historical resources. The purpose of regular monitoring is to evaluate floral and faunal population levels on a comprehensive long-term basis with less emphasis on short term or seasonal changes. A. Maintain healthy,native floral and faunal populations. • Establish plots and photo points in Scrub and Hammock habitats and monitor periodically. • Monitor established plots in the mangroves periodically. • Monitor established transects in the seagrasses periodically. • Periodically determine estimates of wildlife populations within the INRPAI. -- Comment 1KW131:No sense in a list as this will not give you the information you need to estimate • Monitor benthic organisms periodically. population which is what you need to determine whether the species is declining or increasing in the area(i.e.waste of money). Reports will be prepared that detail monitoring results,perform data assessment;compare results to baseline(if known and establish baseline if not known),and detail implications to management to determine whether or not Objective I is being maintained.If not,develop and implement a plan to return the ecosystem to baseline conditions(if possible). B. Protect Listed Species. • Identify and determine status of listed floral&faunal species and associated habitat types. • Identify vulnerable resources located in sensitive or recreational areas in association with disturbance events. • Locate and monitor gopher tortoise burrows periodically. • Update educational information on species,including species lists and the Clam Bay Guide,as needed Reports will be prepared that compile listed species data,their current and historical status(if known), population trends(if known),any potential threats to the population,and number of reported incidents of wildlife harassment or habitat destruction.Determine whether or not listed species are being adequately protected.If not,develop,initiate and enact(if possible)a plan that provides management recommendations to ensure the long-term survival and health of listed species within the NRPA. C. Remove Exotic and Nuisance Flora and Fauna. • Locate and identify exotic,normative,and nuisance species. • Report Category I and II invasive exotic species and nuisance species to the responsible entity for removal,as needed. 41 Avoimmi October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 64 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnher 701 Reports will include the status of exotics and nuisance species;acres removed;and track changes in type and extent.Additionally,any reports of exotic faunal species will be compiled to determine if any action is necessary.If action is required efforts will be made to control exotic fauna. D. Develop an integrated resource management strategy to interpret research results for implementing a conservation strategy(Funding dependant). INSERT FLOWCHARTS FOR OBJECTIVE I Objective 2—Ensure the estuary has adequate tidal and freshwater flows to maintain ecological health within the Clam Bay NRPA A. Identify the minimum tidal flow necessary to ensure a healthy ecosystem. Provide sufficient tidal exchange to maximize benefits while minimizing negative environmental impacts. • Conduct periodic bathymetric surveys of Clam Pass. • Conduct periodic analysis of tidal data. Maintain tidal gauges. • Conduct bathymetric surveys of interconnecting waterways when needed. • Determine through regular biological monitoring whether ecological health warrants intervention strategies Bathymetric surveys of cross-sectional areas of the Pass,tide gauge data,and ecosystem status will be used to indicate if dredging is needed.,Refer to Chapter 5.0,Hydrologic and Ecological Dredging Criteria Tables for determining when to dredge and Appendix 5 for information on hydrologic variables.) If dredging necessary to prevent ecological damage to the estuary and there is a high probability that the situation can not naturally rectify itself,then design and develop a dredging template that does not impact or have the potential to impact seagrass and seek appropriate federal and state permits to dredge Clam Pass and/or Cuts 1-3 if needed. INSERT FLOWCHART FOR Objective 2A B. Ensure appropriate freshwater inputs,freshwater,drainage,and tidal flushing. • Identity and determine appropriate freshwater inputs(quantity and quality)and timing necessary for long-term conservation of the natural biodiversity within the Clam Bay NRPA. • If surface and storm water evaluations determine that it is necessary to reduce the amount of stormwater entering the Clam Bay system then new or existing avenues to accomplish reduction will be implemented through BMP's or other alternative methods (funding permitting). 1 42 r 3 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 65 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rIrtnhor n1d • Efforts will be made to improve the understanding of current freshwater inputs entering the Clam Bay NRPA in comparison to pre-development conditions and to develop strategies to reduce the amount of freshwater entering the Clam Bay system. INSERT FLOW CHART DELINEATING OBJECTIVE 2B • Conduct periodic monitoring of hand-dug channels. • Perform periodic maintenance of selected sections of hand-dug channels. Report status of hand-dug channels and water impoundment within the mangrove forest(if any)and develop intervention strategies if data document the need. Objective 3—Monitor and maintain water quality within the Clam Bay NRPA A. Develop a long-term water quality program that ensures a sustainable healthy environment for all users. • Follow a program of water-quality data collection,addressing the site specific ` criteria approved by FDEP. Comment[k14l:It might not be in your best interest to lock yourselves into the 2011 site specific • Sample monthly from sites used to establish FDEP site specific alternative criteria. creiteriawhen you just say fdepstandards.as • Ensure sampling and testing protocols comply with FDEP guidelines and standards. standards change and may not be site specific Reports will summarize water quality data.Analysis will include a determination of whether or not water quality parameters are within State standards,trending analysis overtime,and implications to area ecology.Data will also be entered into the STORET database on an annual basis.In the event that water quality parameters are not in compliance with State standards,intervention strategies will be developed and initiated. B. Promote programs for controlling water pollution from point and nonpoint sources. ■ • Promote Best Management Practices for fertilizer and irrigation use in Pelican Bay. • • Promote programs to reduce algae levels in upland stormwater ponds in Pelican Bay. • • Promote programs to reduce additional copper input into stormwater ponds in Pelican Bay. • Eliminate and/or reduce the usage of copper algaecide to treat algal blooms in freshwater stormwater lakes whose water ends up within the Clam Bay estuary. • Investigate new methodologies for controlling water pollution Address the copper impairment determination within Clam Bay by determining how and to what degree water quality within the Clam Bay NRPA is influenced by land use practices for delivering storm or surface water into the Clam Bay system.Additionally,reduce pollutants entering the estuary through best 43 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 66 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhor)n1 d management practices geared at reducing storm and surface water pollutant loads,and monitor results through water quality analysis.Report results of subsequent water quality analysis detailing whether or not there has been a measured reduction in copper and/or nutrient laden freshwater inputs.Evaluate the best management practices and track residential units who have initiated and maintained stormwater best management practices. INSERT FLOW CHART DELINEATING OBJECTIVE 3 Objective 4—Monitor archaeological sites within the Clam Bay NRPA A. Monitor conditions of known archaeological sites. • Review historical records of Florida Division of Historical Resources(DHR)on known archaeological sites. • Inspect known archaeological sites periodically. • Report findings as appropriate to DHR. B. Implement strategies for the protection of archaeological sites as needed. INSERT FLOWCHART OBJECTIVE 4 Objective 5—Ensure recreational activities are environmentally compatible within the Clam Bay NRPA A. Monitor access and the condition of the facilities for recreational uses. • Report vegetation needing to be trimmed to the responsible entity. Report litter needing to be removed to the responsible entity. Report facilities needing to be repaired or replaced to the responsible entity. B. Maintain existing canoe trail. Inspect signage periodically. • Repair or replace trail marker signage as needed. • Repair or replace caution seagrass and shoaling signs as needed. Revise and/or reprint the Canoe Trail Guide as needed. C. Maintain existing signage for safe swimmer and boater usage. Inspect signage periodically. • Repair or replace signage as needed. D. Monitor use of facilities/area for recreational uses. • Encourage citizens to report unsafe or environmentally harmful use. Coordinate with responsible entity to enforce the laws and regulations as needed. Continue to support the use of the Clam Bay NRPA for low-impact recreational uses. 44 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 67 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division flrtnhor 7rn E. Maintain materials to educate visitors about the unique features of the Clam Bay NRPA. • Inspect educational signage periodically. • Report signage needing repair or replacement to the responsible entity. • Update Clam Bay Guide as needed. INSERT FLOWCHART OBJECTIVE 5 1 45 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 68 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nrtnhcr 7n1 d The goal and all objectives will be evaluated annually in conjunction with all past and present research and monitoring programs conducted within the NRPA to determine ecosystem status.If progress in achieving objectives is not favorable then the methods detailed within this section will be re-evaluated and updated as needed using new methodologies if warranted to achieve progress in meeting the goal of maintaining the health of the Clam Bay ecosystem. 5.0 Clam Pass Dredging A. Dredging Policy There are two circumstances that could necessitate dredging Clam Pass. 1. Clam Pass closes completely due to a storm or natural event or is in eminent danger of immediate closure following a weather driven event and such conditions are decided by qualified professionals to be uncorrectable through the dynamics of natural hydrological and meteorological processes. In this situation the inlet should be dredged as soon as possible. 2. The inlet has lost hydraulic efficiency and is jeopardizing the health of floral and faunal communities of the Clam Bay NRPA. This determination is made by reviewing and comparing current and past data from tidal hydraulic,bathymetric and ecological monitoring data. In both cases the PBSD Board would,after consultation with and advice from qualified coastal engineers and biologists,approve and recommend an appropriate set of construction drawings for the dredging event to the BCC for its approval prior to the submittal to the regulatory agencies. Dredging will only be done for the health of the Clam Bay NRPA,not for navigation or beach renourishment. The extent of dredging will be limited to only that needed to maintain the health of the estuary.Beach-compatible sand removed as part of the dredging event will be spread on adjacent area beaches. B. Dredging Criteria The purpose of regular monitoring is to evaluate inlet characteristics on a comprehensive long term basis with less emphasis on short term or seasonal changes. To monitor the stability of Clam Pass,and its effect on the ecology,data on the variables listed below will be regularly collected. They will be reviewed by the qualified engineers and biologists. If data are not within the identified target ranges for the variables,further monitoring and/or intervention will be considered in conjunction with the overall health of the flora and fauna within the Clam Bay NRPA. Further information regarding dredging criteria is presented in Appendix 5 and Flowchart 3. 1. Bay Tide Range 46 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 69 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnh ar 7ni Tidal range data have been collected annually since 1999 and will continue to be collected and reported to the consulting engineer at least quarterly. An annual tidal analysis report will be included with the annual report. Data are collected from gauges at four locations(Clam Pass Park Boardwalk,Pelican Bay South Boardwalk,Pelican Bay North Boardwalk,and Upper Clam Bay). These gauges provide a record of the tidal range within Clam Bay and are one indication of the tidal prism or volume of water flowing through Clam Pass at each tidal cycle. Based on an analysis of data from the gauges at the South Boardwalk and Clam Pass Park Boardwalk from 1998 to the present when the inlet was hydraulically stable,the ratio between Clam Bay and Gulf tide was between 0.6 and 0.7 over 90%of the time. Therefore,if the ratio between Clam Bay and the Gulf tide falls below 0.6,but above 0.5,further monitoring will be considered once it has been established that other types of blockage are not causing the problem. If the tidal range ratio falls below 0.5,physical monitoring of,or interventions to,potential shoaling areas that could be impeding flow will be considered. 2. Cross Section of Flow Area and Volume of Shoaled Material Comment[k15]:Question Humiston and Moore on this issue as has ecological considerations Annual bathymetric surveys and reports were completed from 1999 to 2008. Bathymetric surveys provide data on the physical conditions of the inlet channel,ebb shoal and flood shoal. Post-dredging bathymetric surveys and reports were completed at 3-month,6-month,and 12-month intervals following the opening of Clam Pass in April 2013. Beginning in 2014,bathymetric surveys and reports will be issued at least annually. Additional surveys will be considered if the hydraulic efficiency falls below target levels. To establish benchmarks or targets for flow area and volume of shoaled materials,the data analysis included evaluation of the flow cross-section areas in the three main sections of the dredging region. Section A represents the inlet channel,Section B the seaward part of the flood shoal,and Section C the bay side part of the flood shoal. 47 insmommommormi October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 70 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division hrtnhor 7n9 a Vik r74 Section C ,, t t il . r Section A v ry gym ;. Figure 19:Sections A,B and C of Clam Pass The analysis included evaluation of the cross-section of flow between mean high water and the volume hof sand within each segment. The cross-section of flow was computed at each survey station spaced approximately 50 feet apart. The average and minimum cross-section areas were used as indicators of 48 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 71 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhcr 7n1d the physical condition of the flow area of the three segments. The cross-sections were compared to the design cross-section area of the 2013 dredging and the inlet conditions in 2004 and 2008 when inlet conditions were near equilibrium 24 months and 16 months,respectively,following dredging events. 111.111111111111111.1111Wect Section A greater than 300 sq.ft. Section B greater than 450 sq.ft. Section C greater than 450 sq.ft. Targets for the minimum cross-section flow+ Section A greater than 250 sq.ft. Section B greater than 350 sq.ft. Section C greater than 350 sq.ft. Targets for volume of shoaled materials: Section A less than 3000 cu.yds. Section B less than 2500 cu. ds. Sect.. C __less than 4000 cu.iydsk Comment[kmmi 16]:Check with Huston and l -. i_.on ., --__- Moore as these figures seem to be a mhw when permits usually as for mlw also the shoaled material Therefore,if the average cross-section of flow area falls below these numbers or the volume of shoaled volume and other figures are they max?not avg?an, material exceeds these numbers,further monitoring or intervention may be needed. rheic figures could lead toexcesssand removal which is not to the benefit of the estuary. 3. Inlet Channel(Length Comment[k17]:All levels and amounts in the entire hydrologic section need to be compared to past dredging to make sure the limits are not larger. The channel length is an important factor in inlet stability. A longer inlet channel will provide greater resistance to flow. Higher flow resistance will reduce the tidal range and increase the phase lag with the Gulf tide that reduces the tidal prism and flow through Clam Pass. To establish a benchmark for channel length a selection of aerial photos of Clam Pass from 2004 to 2013 was studied as well as data on the approximate length of the channel following dredging events in 2002,2007,and 2013. Based on this analysis,the benchmark for inlet channel is to stay under 400 feet in length. Inlet channel length will be recorded at least annually and included in the annual report. 4. Ebb Shoal The size and shape of the ebb shoal is a key factor to the stability of the inlet that,in turn,supports the stability of Clam Pass. The ebb shoal helps to keep the inlet open when facing storms and big wave events. The ebb shoal provides sheltering to the channel and a sand bypass pathway around the inlet without filling in the Pass. The shape and volume of the ebb shoal are additional indicators of the stability of the inlet. Critical conditions include onshore collapse of the ebb shoal that can be indicated by significant change in ebb shoal offshore distance,volume,and increase in dry beach areas adjacent to the inlet. 49 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 72 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division flrtnhor 7!11,1 To determine a target for the ebb shoal delta,data from April 2013 to April 2014 were reviewed. The ebb shoal position offshore is measured from a line connecting the north and south channel banks at mean high water out to the-4.0 foot contour line. The recommended length of the seaward extent of the ebb shoal is at least than 250 feet. The ebb shoal distance from shore will be recorded at least annually and included in the annual report. 5. Ecology A critical consideration in all dredging decisions is to ensure the ecological health of the Clam Bay NRPA.This will be determined through periodic monitoring of flora and fauna of the NRPA system, including mangroves,benthic communities(including seagrass),and other important species such as fish and birds(as funding permits).Any indication of decline in ecological health and/or population levels will be investigated to determine cause,if possible,and to determine whether or not dredging should be considered as a possible solution. The pros and cons of dredging will be weighed in regards to both hydrologic and ecological consequences.A summary of criteria for dredging are presented in the tables below. Hydrologic Criteria Description Bay Tide Range Ratio Ratio comparison of the interior and Gulf tidal ranges Cross Sectional Area Area in different locations of the Pass through which water can flow Volume of Shoaled Material Quantity of sand and sediments within channel that can restrict flow Inlet Channel Length Distance water must flow through the beach and ebb shoal areas Ebb Shoal Distance from shore to the outer ebb shoal limits Ecological Criteria Description Mangrove Forest Examination of whether or not there are indications that the forest is being stressed by the lack of tidal flushing Sea Grass Beds Determine the extent of beds and whether or not dredging will directly or indirectly impact them Floral and Faunal Determine if dredging could directly or indirectly negatively impact any floral or faunal components C. Dredging Construction 1. Typical Cross-Sections for Dredging Typical cross-sections for the suggested dredge design are provided below. When dredging is deemed necessary,the design cross-section area as stated in the design range,with consideration to existing conditions,will be followed. Minor modifications to this dredging template may be needed for future 50 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 73 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhor 11)1 A. permitting. Typical cross-sections are shown for open areas in Sections B and C where the waterwa is wider than the target cross-section. the cot_will be limited tp maintain a minimum of five-foot buffet:t theJmangrove In Sections B and Comment[k18]:The 5 ft buffer was agreed to Just for the"emergency"dredge as from an C where seagrasses may be present every effort will be made to avoid dredging activities that would be ecological point of view this is too close to the harmful to seagrasses. mangroves as evidenced by the loss of trees and new seedlings in the area that was dredged within 5 feet this buffer needs to be increased to a minimum of 15 —200. 2013 Target Proposed Dredged Area Design Area area Below 312 300 300 MHW • e 6- SECTION A-TYPICAL ' . us4a1r < cp.0 nA MKS • 2— l' -41::t:0.0.33') .._-____ G D- SIh S'. Z 9(•,,o, • O X91 -47 -MOO cur(-Sir roup) SIM-6- ._._Z1113rriueaw 1-4.]'km/50' -10- - NORTH SOUTH -12 i i I I t I t _-� -200 -150 -100 -50 0 50 t00 150 200 DISTANCE FROM CENTER(FEET) Figure 20:Typical maintenance dredging cross-section—Inlet Channel—Section A(figure provided by Humiston& Moore) 51 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 74 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division nrrnhar/M d 2013 Target Proposed Dredged Area Design Area area Below 650 450 450 t X v MHW � , e SECTION 8- TYPICAL 0 1- iI, ..,,.1 I' _ eme+cut l ar.uM t icsrn a(s Y SOD) —8- -ID— NORTH SOUTH -12200 -iso -1100 ' -�o II ' so IEo ' 130 200 DISTANCE FROM CENTER(FEET) Figure 21:Typical maintenance dredging cross-section—Semrard Flood Shoal—Section B(figure provided by Humiston &Moore) 52 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 75 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division frtnhor 7x11 Cubic yards 2013 Target Proposed Dredged Area Design 5L1'9"` Area area i Below 530 450 450 MHW • !- SECTION C-TYPICAL 2- 0,a 331 O-r 1 i aa � aort ry w c-�- i__.__ _ Ico' -e- -10- . NORTH SOUTH - zoo -iso ' -ioo ' -6o d oo ' Ido ' 140 ' zoo DISTANCE FROM CENTER(FEET) Figure 22:Typical maintenance dredging cross-section—Bayside Flood Shoal—Section C(figure provided by Humiston& Moore) 53 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 76 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhor 7n14 6.0 Authorized Construction Activities List of Permits for Work Undertaken to Date and Relevant Legal Framework FDEP and USACE 10-year permits will be sought in conjunction with this new Management Plan, after the application is approved by the PBSD and BCC. The permits will allow for ongoing maintenance activities to continue along with occasional removal of material by dredging within a discreet area of Clam Pass in order to maintain the existing tidal regime within the system. Any changes to the submitted dredging scope or other new management initiatives will be reviewed by the PBSD Board and Collier County Commissioners before seeking any additional permit(s)which may be necessary for the modified activities. Additional investigations which may be undertaken at a later date to look at,for example,faunal investigations,more in-depth water quality concerns,or other issues that may arise as a result of stakeholder discussions could also necessitate permitting which will have to be reviewed by the PBSD and BCC prior to any such permit applications being submitted. This Management Plan is specifically tasked to maintain the improvements and benefits already realized and to insure that the restoration success observed to date is continued. Dredging for navigation or beach renourishment will not be done. Appendix 1 contains the timeline of events within the Clam Bay system and a list of authorizations and brief details related to existing and historical permits issued for the Clam Bay system. 54 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 77 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhor•7nid 7.0 Clam Bay NRPA Management Plan Amendments The Management Plan is not expected to be a static document,and ongoing research will be conducted and data collected related to water quality,hydrographic changes in the various areas of the system, benthic community health,mangrove community health,exotic and nuisance vegetation control,and public education. Conclusions,recommendations,or alternative management activities that come about as a result of studies conducted outside of the scope of this Management Plan will be examined and considered by the Pelican Bay Services Division and qualified engineers and biologists. Those modifications that are found to be pertinent and economically feasible alternatives or additions allowed under the scope of this Management Plan will be added to the Management Plan. 55 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 78 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division rminhor")nla Clam Bay NRPA Management Plan Stakeholder Groups and Review Agencies Review A:encies Collier County Natural Resources City of Naples :ill Lorenz ichael R.Bauer,J.D.,Ph.D. 800 N Horseshoe Dr 95 Riverside Circle aples,FL 34104 aples,FL 34102 Collier County Parks and Recreation lorida Dept.of Environmental Protection I I. egan.0.Box Millslls I aura Kraus/Barry Williams 15000 Livingston Rd I ort Myers,2549 33902 I ales,FL 34109 I lorida Fish&Wildlife Conservation Comm. I lorida Fish&Wildlife Conservation Comm. Section oating&Waterway s I: I abitat&Species Conservation Div. South Meridian s St 1 829 Tenoroc Mine Rd 62allahassee,FL 32399 I a33805 South Florida Water Management District ational ional Mine Fisheries Service I aura Layman IP 63 13th Avenue S r aur McGregor Blvd St.Petersburg,FL 33701 Fort Myers,FL 33901 .S.Fish and Wildlife Service .S.Army Corps of Engineers 1339 20th Street unis McElwain erg beach,FL 32960 1520 royal Palm Square Blvd,Ste 10 I ort Myers,FL 33919 Stakeholder Grou.s/Individuals Conservancy of Southwest Florida Collier County Audubon 1495 Smith Preserve Way 1020 8th Avenue S,Ste 2 aples,FL 34102 aples,FL 34102 aples Cay Association 1Box Action770404 Group ,0 Seagate Dr,Ste 1206 I'.0.Box 770404 aples,FL 34103 ales,FL 34107 •elican Bay Foundation 'aradise Coast Paddlers Club •251 Pelican Bun Bt io 392 Clipper Way aples,FL 34108 aples,FL 34104 ate Property Owners Association Sea 1'elican Bay Property Owners Association ox 3093 801 Laurel Oak Dr,Ste 600 0.apBox FL 34106-3093 aples,FL 34108 Sierra Club—Calusa Group Southwest Florida Paddling Club 0991 S Tamiami Trail .075 Pelican Bay Blvd,#703 I s991 TL iami Tail aples,FL 34108 56 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley,10/28/2014 Page 79 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division llrtnhor 7n1d Tall Tales Bait and Tackle The Ritz-Carlton Naples 841 Vanderbilt Beach Rd 280 Vanderbilt Beach Rd Naples,FL 34108 Naples,FL 34108 The Seasons at Naples Cay Condo.Assoc. Waldorf Astoria Naples 81 Seagate Dr,#3000 475 Seagate Dr, Naples,FL 34103 Naples,FL 34103 Diane Solomon Brown&Stuart Brown Sandra J Doyle dianesolomonbrown@me.com naplespatriots@comcast.net Anne Georger Brandon Lampe ageorgerl@gmail.com brandonlampe@rocketmail.com Diane Lustig&Leon Lustig Linda Roth lustigl@embargmail.com LOR3LOR3@aol.com Missy Travis&Pat Travis Mary McLean Johnson missy.travis@gmail.com 6573 Marissa Loop#1501 ptravis@delotte.com Naples,FL 34108 57 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 80 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division flrtnhcr 9f11 d Clam Bay NRPA Management Plan iblio ra h = Comment[uw191:Renumber and format Benedict,M.A. 1984.Department of Natural Resources Collier County Part 4 Natural Resources Management Plan.Tech.Report NO.84-4.pp.6-9,69-80. Benedict,M.A. 1984.Department of Natural Resources Collier County Part 1 Natural Resources Management Plan.Tech.Report NO.84-1.pp.36 Coastal Zone Management Plan for Collier County Florida. 1991.Collier County Natural Resources Department.pp 279-294. Collier County Natural Resources Department.Clam Bay Natural Resources Protection Area Management Plan Draft,technical paper-4th rev.Nov 21, 1994. 2. Collier County.Executive Summary—Approval of Clam Bay Natural Resources Protection Area(NRPA).21 Feb 1995. 3. Crewz,David W., 1989,Clam Pass Park mangrove damage,Department of Natural Resources Interoffice Memorandum. 4. Crewz,David W.Florida.Department of Natural Resources.Clam Pass Mangrove Damage. Interoffice Memo,May 1989. 5. Department of Environmental Regulation, 1981,Diagnostic and Feasibility Study for Moorings Bay,Collier County,Florida. Devlin,D.J.,Gore,R.H.,and Proffitt,C.E. 1987.Natural Resources of Collier County.Preliminary Analysis of Seagrass and Benthic Infauna in Johnson and Clam Bays,Collier County Natural Resources Dept.CM 169. Technical Report No.87-2. 6. Gee&Jensen Engineers,Architects and Planners,Inc., 1978,Hydrographic Study Clam Bay System Collier County,Florida for Coral Ridge-Collier Properties Inc.,report. 7. Hartwell,Richard W.,Hatcher,James M.,Grabe,Stephen,August 1994,Clam Bay Natural Resources Protection Area(NRPA),Collier County Environmental Services Division,Publication Series NR-SP-94-01,technical paper. 8. Hawkins,Mary Ellen,Obley,Ross P.,"Pelican Bay-Visit and Revisit."Urban Land Vol.40,No 11.(December 1981)21-27. 9. Heald,Eric J.,Tabb,Durbin C.,Roessler,Martin A.,Beardsley,Gary L.,Ward,Gerlad M., Durrance,Dallas H.,Yeend,John S., 1978,Carbon Flows in Portions of the Clam Pass Estuarine System,Collier County,Florida,Tropical Biolndustries Company and Gee and Jenson,Engineers- Architects-Planners,Inc.,technical paper. 58 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 81 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division (lrtnhar 1111d 10.Heald,Eric J.,Roessler,Martin A.,December 1979,Invertebrate Population Studies in the Vicinity of Upper Clam Bay,Collier County,Florida,Tropical BioIndustries,technical paper. 11.Heald,Eric J.,July 1983,Populations of Melampus coffeus and Cerithidea scalariformis West of Upper Clam Bay,Collier County,Florida,Tropical BioIndustries,Inc.,technical paper. 12.Heald,Eric J.,July 1983,Fish Populations of Tidal Ponds West of Upper Clam Bay Collier County,Florida,Tropical BioIndustries,technical report. 13.Humiston and Moore Engineers.2007.Clam Pass Restoration and Management Plan Bathymetric Monitoring Report No. 8. 59 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 82 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division 14.Humiston and Moore Engineers.2010.Clam Pass Restoration and Management Plaitnhor.)m A Bathymetric Monitoring Report No. 12. 15.Humm,H.J.and Rehm,A.E. 1972.Ecological Appraisal an Ecological Study of the Clam Pass Complex. Study for the Collier Company at Clam Pass Properties.Tri-County Engineering, Inc.TCE Project No. 1516. 16.Lewis,Roy R.,and Marshall,Michael J. Lewis Environmental Services. First Annual Report, #2;One year after flushing channel construction. 1997. 17.Natural Resources Conservation Service.United States Department of Agriculture. Soil Survey of Collier County Area,Florida. 1998. 18.PBS&J,Inc.,Clam Bay System Data Collection and Analysis. October 2009. 19.Tackney&Associates,Inc.,Preliminary Hydrographic Assessment Clam Bay Systems. August 1996. 20.Tri-County Engineering,Inc., 1971,Tidal Datum Plane Determination for the Collier Company. 21.Tri-County Engineering,Inc., Sarkar,Chiranjib K.Hydrographic Investigation of the Clam Bay System,Technical paper.October 1972. 22.Tropical Biolndustries and Missimer and Associates,Inc.,A Comparative Study of the Water and Carbon Flows of Upper Clam Bay,technical paper.June 1979. 23.Turrell&Associates,Inc.Environmental Assessment Northwest Fill Area for Pelican Bay,technical paper.February 1979. 24.Turrell and Associates,Inc.and Humiston&Moore. "Clam Pass Inlet Management Plan Interim Report No. 1".July 1995. 25.Turrell,Hall&Associates, Inc.2009.Clam Bay Restoration and Management. Biological Monitoring Report.Eighth Annual Report No. 11. 26.Wilson,Miller,Barton&Peek,Inc.Pelican Bay Mangrove Investigation,Pelican Bay Water Management System-Stormwater Detention Volume and Water Budget Analyses.April 1996. 27.Worley,Kathy and Jeffrey R.Schmid."Clam Bay Natural Resource Protection Area (NRPA)Benthic Habitat Assessment-Report for the Contract Agreement Between Pelican 60 October 28,2014 Clam Bay Committee of the Pelican Bay Services Division Submitted by Kathy Worley, 10/28/2014 Page 83 of 83 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division Bay Property Owners Association(PBPOA),Pelican Bay Foundation,Inc.(PBF),and the Mangrove Action Group(MAG),and the Conservancy of Southwest Florida(CSWF) m a 2010. 61 CLAM BAY MANAGEMENT PLAN-COMMENTS ON PROPOSED CHANGES SUBMITTED BY KATHY WORLEY By Mary Johnson, Pelican Bay Foundation Submitted to the PBSD Clam Bay Subcommittee October 28,2014 1) The Conservancy's letter of October 10 to the County commissioners refers to the Clam Bay Management Plan needing some"minor revisions." What is being proposed is not minor and would significantly alter key elements, including parameters for dredging that have been developed based on extensive engineering analysis of pre-and post-dredging conditions at Clam Pass and what has worked previously to maintain the Pass. 2) Including the proposed "ecological indicators"with the hydrologic indicators in determining when to dredge would be inconsistent in terms of the time horizon for evaluations and the causal relationship. The hydrologic indicators are anticipatory;they indicate when conditions are approaching the need to dredge. The ecologic indicators are lagging indicators,since it takes time for stress to become apparent. The purpose of the hydrologic parameters is to determine when dredging is needed to maintain the health of the estuary; if ecological indicators are introduced--indicators of stress--then dredging will only take place after health has deteriorated. This will put the PBSD into a restoration not maintenance mode. The proposed "ecological indicators" are described only very generally and will be open to interpretation and subjective judgment,while the hydrologic parameters are very precise.See the paragraph that would be added in the appendix on dredging: The only reason for dredging to be considered is to maintain the ecological health of the NRPA.Any decline in the health of the flora or fauna or any indication of system stress will be assessed to determine if tidal flushing could alleviate the problem without causing irreversible harm to other biological components of the estuary. If dredging is under consideration, all pros and cons will be weighed in relation to impacts on vital components of the ecosystem prior to being implemented. This is simply a statement of principle that repeats what has appeared elsewhere in the plan. It does not provide any specific guidance and should not be included in this section. What is likely to result from these proposed changes is a controversy every time the Pass needs to be dredged, because the hydrologic indicators will show it is needed, but the ecological indicators will not.This is bad policy and will lead to more of what we have seen these past few years--a Pass in crisis and spiraling expenditures 3) Changes to the dredging template are being proposed to reduce the cross-section in the inner flood shoals. The provision to maintain a five-foot buffer between the dredged channel and the mangrove fringe is being disputed as being insufficient and a larger 10-20 foot buffer is being proposed because several mangrove trees were lost previously. However,the plan developed by the engineers is similar to what was done under the prior ten-year permit that worked well to maintain the system, including the overall health of the mangrove forest.The engineer's recommendation should be followed. 4) An anti-dredging bias has already emerged in prior changes. For example,we have seen prior changes to the paragraphs where it was stated that if monitoring indicated the system was being stressed, intervention would be considered. That was changed to read that if monitoring indicates the system is being stressed,further monitoring will take place. Let's not have a plan to"watch"the system to death. 5. The flow charts introduce new objectives to the plan and describe new policy in their footnotes. See especially footnote 4 under Figure A: Goal: To the greatest extent possible, restore natural flow-ways, tidal circulation and freshwater hydroperiod to assure the correct quality, quantity and timing of fresh and salt water is entering and existing the Clam Bay This language would require management of freshwater in-puts, which are important, but management of the Pass should not be contingent on reducing these inputs, which implies controlling irrigation throughout Pelican Bay. It will add new burdens to the process. Further, mechanisms are lacking to implement controls on irrigation water use —as was recognized in the language of the former Clam Bay Restoration and Management Plan (p. 76-77 ff). This addition is also reflected in the new language and requirements being added via the flow chart for Objective 2 that are repetitive of what has already been in the plan. For example,the new language relating to water quality analysis is repetitive of what has already been separately stated regarding the program of water quality data collection and analysis,which presumes analysis for pollutants and nutrient loadings and appropriate responses to deterioration or impairments. 6) Changes reflecting comments by the Foundation related to the discussion of water quality have been deleted, including references to prior studies that should be part of the record. 7) Time is of the essence to obtain a permit to dredge the Pass that would allow regularized maintenance dredging. Conditions are already approximating those that resulted in the closure of the Pass in 2012. The Foundation's property is again in harm's way. The management plan has been in development for almost two years and the need to move on to secure a long-term dredging permit that would allow hydraulic dredging is urgent. 8) There are changes in the Executive Summary that prescribe that the plan is to be "an integral part of permit applications" rather than "support permit applications" as previously stated. However,this prescriptive approach seems to preempt the BCC in determining if the plan should accompany the dredging permit application as well as the permitting agencies in determining which elements are incorporated in the permit by reference. l4h A.tege J. 64 S • trt,,jet„ Q l ei e r, C. Ecological considerations /V/a?l 0201 T cif uct Dredging will be done only for the health of the Clam Bay NRPA. The health of the co mitt , +Gs estuary will be regularly monitored. Any indication of decline in ecological health will be investigated to determine the cause and to determine whether dredging ,/K R'e' should be considered as a possible solution.. Before any dredging event,the indirect or direct impact on the flora and fauna of the NRPA,including mangroves,benthic communities (including seagrass),and other important species,such as fish and birds,will be assessed,and every effort will be made to minimize any negative impact. D. Dredging Construction...