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PBSD MSTBU Clam Bay Committee Agenda 09/10/2019 PELICAN BAY SERVICES DIVISION Municipal Service Taxing and Benefit Unit NOTICE OF PUBLIC MEETING SEPTEMBER 10, 2019 THE CLAM BAY COMMITTEE OF THE PELICAN BAY SERVICES DIVISION WILL MEET AT 1:30 PM ON TUESDAY, SEPTEMBER 10 AT THE PELICAN BAY SERVICES DIVISION, 3RD FLOOR OF THE SUNTRUST BUILDING, SUITE 302, LOCATED AT 801 LAUREL OAK DRIVE, NAPLES, FLORIDA 34108. AGENDA 1. Roll call 2. Agenda approval 3. Approval of 07/11/19 meeting minutes 4. Audience comments 5. Clam Pass a. August tidal ratio report b. August aerial photos c. Background on County's request and response d. Possible talking points e. Timeline for dredging-related activities f. Advanced beach renourishment 6. Water Quality a. Copper results b. Phosphorus levels in Clam Bay c. County lab reports d. PO for water quality reports 7. Clam Bay a. Hand-dug channel maintenance b. Canoe trail markers 10 and 12 c. Scaevola treatment d. Canoe Trail guide e. Pelican Bay Post articles f. Update on Manatee Protection Zone 8. Next meeting: October 4 or 7, 2019 9. Adjournment ANY PERSON WISHING TO SPEAK ON AN AGENDA ITEM WILL RECEIVE UP TO THREE (3) MINUTES 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. 09/03/2019 10:26 AM PELICAN BAY SERVICES DIVISION CLAM BAY COMMITTEE MEETING JULY 11,2019 The Clam Bay Committee of the Pelican Bay Services Division met on Thursday, July 11 at 1:30 p.m. at the SunTrust Bank Building, 801 Laurel Oak Drive, Suite 302,Naples, Florida 34108. In attendance were: Clam Bay Committee Denise McLaughlin Susan O'Brien, Chairman Rick Swider Pelican Bay Services Division Staff Mary McCaughtry, Ops. Analyst (absent) Neil Dorrill, Administrator (by phone) Alex Mumm, Interim Sr. Field Supervisor Lisa Jacob, Interim Operations Manager Barbara Shea, Recording Secretary Also Present Jacob Damouni, PBSD Board Jennifer Bobka, Earth Tech Scott Streckenbein, PBSD Board Mohamed Dabees, Humiston & Moore APPROVED AGENDA (AS PRESENTED) 1. Roll call 2. Agenda approval 3. Approval of 05/09/19 meeting minutes 4. Audience comments 5. Clam Bay a. Hand-dug channel maintenance b. Canoe trail markers 10 and 12 c. Scaevola treatment d. Canoe Trail guide e. Pelican Bay Post articles 6. Clam Pass a. June tidal ratio report b. June aerial photos c. Bathymetric survey results d. Data on Clam Pass dredging 7. Water Quality a. First quarter report b. Copper results c. Impact of pond contamination on Clam Bay 8. Next meeting: September 10 or 12, 2019 9. Adjournment ROLL CALL All members were present and a quorum was established 1 Pelican Bay Services Division Clam Bay Committee Meeting July 11,2019 AGENDA APPROVAL Ms. McLaughlin motioned, Mr. Swider seconded to approve the agenda as presented. The motion carried unanimously. APPROVAL OF 05/09/19 MEETING MINUTES Ms.McLaughlin motioned,Ms. O'Brien seconded to approve the 05/09/19 meeting minutes as presented. The motion carried unanimously. MR. DORRILL JOINED THE MEETING BY TELEPHONE AT 2:10 PM AUDIENCE COMMENTS None CLAM BAY HAND-DUG CHANNEL MAINTENANCE Ms. Jennifer Bobka, Environmental Consultant with Earth Tech, provided a diagram of Clam Bay which identified key areas of this year's recommended hand-dug channel maintenance of approximately 2 1/2 miles based on mangrove plot data. The key areas selected were areas with mangrove health scores either declining or not improving. Ms. Jacob commented that she is in the process of preparing request for quotes from County exotic removal contractors for this project. Ms. McLaughlin provided an article, for submittal to the Pelican Bay Post, that she has drafted entitled, "Channels through the Mangroves"which was added to the record. Ms. O'Brien provided an edit to the article, stating that most recently Earth Tech, not Turrell Hall & Assoc., has worked on hand-dug channel maintenance for us (second paragraph, fifth line). She also suggested that Turrell Hall consultants, Earth Tech consultants, and committee members review the article and provide any edits. The committee agreed that a photo should accompany the article. CANOE TRAIL MARKERS 10 AND 12 Ms. Jacob reported on a recent conversation with Mr. Chris D'Arco, Sr. Field Inspector of the Collier County Coastal Zone Management Division, who reported that the County plans to re- install canoe trail markers 10 and 12 in August. SCAEVOLA TREATMENT Ms. O'Brien commented that we are continuing to work on developing a proposal for a future scaevola removal project, to be included in a future PBSD budget. CANOE TRAIL GUIDE Ms. Bobka provided a draft copy of the new canoe trail guide (prepared by Earth Tech) to the committee for review. Ms. O'Brien requested edits be provided to staff no later than July 19. Ms. Jacob is ready to send the draft to be printed. Ms. O'Brien suggested that once the new canoe trail guides become available, that "new canoe trail guides are available" be included in a future PB Post edition. Dr. Dabees suggested that the canoe trail map be added to the Pelican Bay app. PELICAN BAY POST ARTICLES 2 Pelican Bay Services Division Clam Bay Committee Meeting July 11, 2019 Ms. McLaughlin commented that she is working on an article on our Clam Bay natural resource protection area plan and provided a copy of her rough draft, which was added to the record. CLAM PASS JUNE TIDAL RATIO REPORT Not discussed JUNE AERIAL PHOTOS Not discussed BATHYMETRIC SURVEY RESULTS Not discussed DATA ON CLAM PASS DREDGING Dr. Dabees provided a presentation for purposes of addressing two issues, (1) summary and review of the Clam Bay Management Plan five years after including an analysis to determine whether the plan and/or the template can be improved, and (2) County concerns over the PBSD dredging of Clam Pass three years in a row(2016, 2017, and 2018). Ms. O'Brien commented that not only did we dredge three years in a row, but we also requested an emergency declaration each time, which is very concerning to the County. She recapped (1) at the beginning of FY2019, the County Manager's Office expressed concerns to Mr. Dorrill regarding emergency Clam Pass dredging events three years in a row, and(2)in November 2018,a motion was passed by the PBSD Board whereby the board requested that the Clam Bay Committee explore the concerns raised by Mr. Casalanguida, Deputy County Manager, and bring a recommendation back to the PBSD Board. The committee decided to collect key data on dredging over the last 20 years, including key variables such as number of times, volume of sand removed, costs, equipment used, etc. The goal for the committee now is to discuss and decide which of this data should be presented to the PBSD Board, and then subsequently brought forward to a discussion with the County Manager's Office. Dr. Dabees stated that the goal of the Clam Bay Management Plan (approved by the BCC in January 2015)is to establish the basis and protocols for the management activities for the health of the Clam Bay NRPA estuary. The objective is to protect the environment and the ecosystem, and support the recreational use of the system. Ms. O'Brien suggested that Dr. Dabees focus his presentation on the reason for the 2016, 2017, 2018 dredging and what can we do differently to prevent this in the future. Dr. Dabees provided a table of dredging history from 1999 to present, including volume of sand removed,dredge width,dredge depth,identification of sections dredged,and equipment used. Ms. O'Brien suggested that costs for each dredging event be added to this table. Dr. Dabees provided a history over the same time period of severe storms. Dr. Dabees provided a table (2007-2018) showing both storm and dredging events, and concluded that this table clearly shows that the Pass was dredged in 2016,2017,and 2018 as a result of multiple severe storms in a row, which gave the Pass no chance to recover. The Pass is fragile and recovery is slow after a storm event. Dr. Dabees noted that the current condition of the Pass is very good, one year subsequent to the last dredging event. 3 Pelican Bay Services Division Clam Bay Committee Meeting July 11, 2019 Ms. O'Brien summarized the items which the committee has agreed to share with the County Manager's Office to include a 20-year timeline of dredging events, storm events, related cost information and a one-page discussion of key features and key variables of the Clam Bay system (as suggested by Ms. McLaughlin). She suggested that Dr. Dabees bring any recommendations for additional data to share with the County,to the next committee meeting. Ms. O'Brien requested that Dr. Dabees provide a copy of his 79-page powerpoint presentation/report to staff to forward to committee members to review before the next committee meeting, at which time the committee will decide what information to forward to the PBSD Board. Dr. Dabees commented that his final product would include an executive summary, with his report as the backup documentation. Ms. O'Brien commented that she was not aware that Dr. Dabees was preparing a large technical report; it was her impression that Dr. Dabees was just gathering key historical data. Mr. Dorrill commented that as a point of clarification,the PBSD is obligated to do a 5-year technical update of the Clam Bay management plan. Per discussion with Humiston&Moore,the agencies are accustomed to 5-year management plan update. He noted that what gets presented to the County will be in "executive summary format" and it must also be appropriate to present to the permitting agencies. Ms. O'Brien commented that she was unaware of 5-year update requirements. Mr. Dorrill commented that our deadline for a response to the County is Sept. 30 and that he will distribute a copy of Dr. Dabees' draft report to the committee, when it becomes available. Dr. Dabees expects his draft to be available to the committee by Friday, Aug. 2. WATER QUALITY FIRST QUARTER REPORT Ms. O'Brien commented that the first quarter water quality report, prepared by Dr. Tomasko,was received and included in the agenda packet. She noted that total phosphorus results continue to be problematic,with 26 of 27 results exceeding allowable upper limits. She also noted that phosphorous data at the six berm sites does not show a high level of phosphorous at the berm, and therefore the berm area cannot be the source of the Clam Bay exceedances. The committee will further discuss this issue with Mr. Hall, consultant with Turrell Hall, at a future meeting. COUNTY LAB TEST RESULTS Ms. O'Brien commented that the County Lab has not yet provided April and May test results. Ms. Jacob responded that she will follow up with the County Lab. NEXT MEETING: By consensus,the committee agreed that the next meeting of the committee would be held on Sept. 10, 2019 at 1:30 p.m. ADJOURNMENT The meeting was adjourned at 3:28 p.m. 1 Susan O'Brien, Chairman Minutes approved [ ] as presented OR [ ] as amended ON [ ] date 4 ClamPass-TIDE I Humiston& Moore Engineers Agenda item#5a Page 1 of 1 " Restoring Beaches as Natural Coastal Systems ii IHUMISTON&MOORE tlawii ENGINEERS Home About H&M Services Projects Contact Careers Client Login Clam Pass Consulting Coastal Engineers CLam Pass Tide Monitoring-Click here for Maintenance Dredging Project details Guto/Mexico _ MARKER 4 MARKER 14 MARKER 26 MARKER 32 Clain Pass .. a ). .,*`.y.J_ •. rI e e� r ` iR� i . a !ja`iii rA 11'.1ie�', r�A;„; It-i3r ,It: r '._ • r ;i •,.. '..' ..vt.:.9Sp :r - .. A '''it sli .,' - "' Monthly HTime Series 2019(Click on Thumbnails to Expand) S Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Mean Low TideTime Laq-2019 300.0 250.0 - 1 c 200.0 - 1 I it Marker 4 150.0 d Marker 14 co I v I , ■Marker 26 O 50.0 -100.0 - i Marker 32 ' l I 11111 •Gage not working properly 0.0 , Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Gaqe/Gulf Mean Tide Ratios-2019 0.90 0.80 - •Gage not 0.70.50 working ,� I 111 Properly 0 0.60 --. ' m I ii Marker 4 a 0 •g F Marker 14 '0.40 - ■Marker 26 r• 2 0.30 - Marker 32 0.20 - 1 _l l I F CAM; Subhty 0.10 - 1 eau• Ruse far 0.00 - r . M•,4en Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec •a,ti Gage/Gulf Mean Tide Ratios-2018 0.90 - PASS DOMING • 0.80 - •Gage not working 0.70 . .. ♦ Properly 's 0.60 . ••: .1 z ` ■Marker 4 m 0.50 - �:.._... ., �� ........ v •Marker 14 F'•0.40 •Marker 26 0.30 • I 1 1 ■Marker32 E: IF,IiII ,II , I 1 nan lar rr Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec •gt'' https://www.humistonandmoore.com/clampass-tide 9/3/2019 Agenda item#5c Page 1 of 1 From: CasalanauidaNick To: JVeilDorrill Cc: CallahanSean;OchsLeo;YilmazHeather;)acobLisa Subject: Pelican Bay recap Date: Monday,October 15,2018 1:18:39 PM Attachments: jmage001.Dnq Neil, Thank you for coming in today with Lisa. I wanted to recap the meeting so I can assign some taskers to our staff to keep our ideas moving. If I missed anything or if I am off a little with my notes, please let me know. • Maintenance facility o Goal is to develop a shared use facility master plan before the Christmas break and move that forward to be construction ready by the fall of 2019 o Sean is going to coordinate a meeting with our facilities team so we establish a work team that can handle the details as we move forward • Sidewalks and Drainage o Goal is to transition the sidewalks and drainage systems outside of the paved right of way to PBSD • Sidewalks are pretty straightforward • Drainage cutoff needs to be refined o Sean will work with GMD to get you a copy of our drainage outfall plan in the next 30 days • You need a map of these locations and a spreadsheet identifying them • These exhibits will be used as a reference document in the transaction o PBSD was going to work on developing the financial plan • Clam Bay Management Plan o This topic is going to be raised at the November PBSD meeting o Discussion will be had about reviewing historical methods of maintaining the pass with the more recent methods o The goal is to try and find common ground with the approach in order to manage stakeholder expectations with the need for a more sustainable maintenance plan • We need to avoid the annual emergency dredging as the agencies and the public are beginning to question the approach I am going to ask Heather to get us together again in mid-December to maintain momentum on accomplishing these initiatives. I also wanted to thank you for working with internal controls and ramping up the QA/QC program. Respectfully, Nick Casalanguida Collier County, Deputy Manager NickCasalanguidaPCollierGov.net 239-252-8383 Agenda item#5c-1 Page 1 of 1 Pelican Bay Services Division Board Regular Session November 7,2018 of time between maintenance dredge events. He commented that there is a"perception issue"resulting from the process of frequent requests for approval of TDC funds on an emergency basis. He will discuss this issue again at the upcoming Clam Bay Committee and Budget Committee meetings. Ms. O'Brien commented that these concerns have not been expressed at BCC or TDC meetings as recent as Spring 2018. She also commented that we could do a better job of improving our timeline (process of obtaining BCC and TDC approval, obtaining bids for the project, and completing the dredge event). Dr. Ted Raia, representing the PBPOA and the Mangrove Action Group, commented on the history of dredging Clam Pass, and that dredging events are for the purpose of maintaining the health of the mangroves, not for the purposes of navigation or to obtain sand to benefit beaches. Ms.O'Brien motioned,Mr.Griffith seconded that the PBSD Board ask the Clam Bay Committee to explore the concerns raised by Mr. Casalanguida and bring a recommendation back to the PBSD Board. The motion carried unanimously. UPDATE ON STREETLIGHT PROJECT AND SIGN BID AWARD Mr. Dorrill commented that the streetlight project has been awarded and the contractor is expected to begin work on Nov. 13,with an expected completion in 90 days. Mr. Dorrill commented that the PBSD received four bids for our street sign replacement project,with AIS(American Infrastructure Services)being the lowest responsive bidder. The contract is being prepared and the expected award date is Dec. 11. The work may take up to a year to complete. US 41 BERM CLEAN-UP AND RESTORATION Mr. Dorrill commented that the plans and specifications for the US 41 berm landscape restoration project have been provided to the County Procurement Dept., who will prepare a project solicitation to be put out for bid, hopefully within 30 days. GULF PARK DRIVE MEDIAN-CUT CONSTRUCTION AND RE-STRIPING Mr.Dorrill commented that the median-cut project is complete. He commented that the PBSD is in the process of obtaining Pelican Bay Foundation approval for new proposed signage which would restrict traffic on Gulf Park Dr. to a "right turn only" when exiting onto US 41. This issue will be discussed at the joint PBSD/PBF workshop on Nov. 12. BAY COLONY DUNE SWALE TOPOGRAPHIC SURVEY Mr. Dorrill commented that our engineer ABB has completed the Bay Colony beach dune swale topographic survey. The survey shows a large amount of sediment,willows, and mangroves in the swale. He commented that he will have a discussion of the construction drawings with the Water Management Committee at their next meeting. OAK LAKE SANCTUARY WEIR MODIFICATION Mr. Dorrill reported that we have received a SFWMD permit to effectuate the enlargement of the orifice at the weir adjacent to the Oak Lake Sanctuary community (to improve drainage). Quotes were received for the project,with Kyle Construction being the lowest responsive bidder for$12,625. Work will be scheduled when the lake level falls below the control elevation. 3 Agenda item#5d Page 1 of 1 Possible Talking Points with County staff members 1. Current conditions of Clam Pass (photo from p. 6) 2. Key information about Clam Pass a. Dredging permits for Clam Pass expired in 2008 so maintenance dredging could not be done from 2008 to 2012 when the Pass closed. This closure resulted in the collapse of the ebb shoal and large volumes of sand being pushed onshore. (p. 3) b. An emergency Nationwide permit was issued in 2013 so Clam Pass could be opened. Due to the emergency, mechanical equipment was used which did not allow for the removal of sand in all areas of Section B or any area of Section C. c. Wave events and tropical storms in 2016 and 2017 were significantly above average. In 2016 calm wave conditions represented only 38%compared to over 60%of the time in a typical year. (pp. 7-11) d. In 2016 and 2017 the net sediment transport was to the north which is opposite the typical yearly trend which is to the south. (pp. 8-9) e. In December 2016 beach renourishment at Park Shore added 32,000 cubic yards of sand, some of which traveled north to Clam Pass where 15,000 cubic yards of sand had been placed on the beach south of Clam Pass when the Pass was dredged in the spring of 2016. (p. 9) f. Increased shoaling in Section B since 2010 has caused some erosion of the mangrove shoreline on the south side of Clam Pass, resulting in the increase in the width of Section B by about 55 feet from 2000 to 2019. (Appendix B Figures 3-5) g. The width of the beach north of Clam Pass is about 50 feet wider than the beach south of the Pass, making the Pass more resilient to storms originating from the north, but when tropical storms in 2016-17 were from the south, they had an adverse impact on Clam Pass. (pp.15- 16) 3. Data on Clam Pass dredging (pp. 11-12) 4. Going forward a. Make every effort to complete maintenance dredging of Clam Pass when needed without seeking emergency action by the BCC. b. Seek emergency action only in the event it is necessary due to significant weather events. c. Continue to adjust the grading of inlet banks during dredging to streamline flow and minimize erosion and channel meanders; and consider other adjustments, if needed. d. Monitor beach renourishment plans so they do not negatively impact conditions at Clam Pass. n.b. References are to Mohamed Dabees' report "Clam Pass 2019 Review of Inlet Management". Draft prepared by Susan O'Brien September 3, 2019 Agenda item#5d-1 Page 1 of 3 2019 Clam Pass Management Review Pelican Bay Services Division 2.1 Analysis of physical monitoring data Figure 6 shows recent aerial photo taken in July 2019 of Clam Pass.The aerial photos and survey data of May 2019 indicate the stable inlet conditions 1 year post 2018 maintenance dredging. Appendix A includes summary of the 2019 inlet condition survey showing cross section plots of existing conditions at various locations within the inlet sections. Review and analysis of all available data over the past 20 years were completed as part of this study. Appendix B includes plots of changes in inlet geometry and inlet cross sections based on available data over the past 20 years.The inlet morphology data analysis indicated • • 44* • {",' • , • __� .. Figure 6. Clam Pass aerial in July 2019,one year post 2018 maintenance dredging the following: • Dredging the authorized template increases flow areas and sand holding capacity in the flood shoal areas. • Rapid shoaling typically occurs in the first year post dredging and evolves towards equilibrium conditions of flow area and sand accumulation within the template. • Cumulative shoaling rates vary over years between dredging events depending on wave events, frequency, intensity and duration of storms. • Increased shoaling in Section B of the flood shoal area since 2010 forced the flow to channelize along the south bank of the flood shoal area.This resulted in significant erosion of the mangrove shoreline and expansion of the width of Section B. • The change in the geometry of Section B since 2010 increased the inlet channel meander towards the north and reduced inlet stability potential. • Blocking the channel meander as part of the south bank grading during the 2018 maintenance dredging helped reduce the channel meander and increase stability of the inlet. 6 Humiston&Moore Engineers Agenda item#5d-1 Page 2 of 3 2019 Clam Pass Management Review Pelican Bay Services Division 2.4 Timeline of Dredging Events and Tropical Storms at Clam Pass The analysis of the wave record presented in this study provided the timeline of storm activities and recent inlet dredging events as shown in Figure 14. The figure highlights named storms that had significant impacts on southwest Florida in general and Clam Pass in particular. Clam Pass Dredging Events Inlet '`:rtial Excavation Closed Re-open Inlet ilitimia Dredge I L. 2007 2008 7 2009 2010 2011 2012 7 2013 H 2014 2015 x 2016 2017 12018 H TS Bari arry TS Fay ay TD Bonnie TS Lee TS Andrea June-TS Colin May-TS Alberto Sept-HC Hermine Oct-HC Michael June—TS Debby June-TS Cindy Storm August—TS Isaac _July TS Emily — Sep-HC Irma events Sep-HC Sandy Oct- HC Nate Figure 14.Timeline of tropical storms and dredging events(2007-2018) The analysis of the wave record and storm events indicates the correlation between increased storm activities and dredging events. Storm activity affected southwest Florida in 2012, 2016 and 2017. The inlet closed in the fall of 2012 following sequence of tropical storms Debby, Isaac and Sandy. Emergency maintenance in 2017 and maintenance dredging in 2018 helped avoid inlet closure during the active years of 2016/2017 and restored the inlet to stable conditions. This illustrates the importance of the monitoring program and the ability to conduct emergency responses in a timely manner following major storm events to avoid potential for inlet closure. The wave analysis also provided assessment of the variability in long-term wave climate and the inlet response to prevailing sediment transport in both directions.Typically the beach and inlet geometry adjusts to near equilibrium following long-term trends.This includes the predominant trends of sand transport from north to south. Sustained wave energy from the south over two consecutive years represented atypical conditions that impacted inlet stability and required maintenance dredging to restore the inlet stability. This analysis also indicates the critical nature of Clam Pass as small inlet that is stable under typical conditions and requires maintenance dredging to restore inlet stability when sever weather and tropical storms impacts the inlet.The inlet stability is event driven,and the maintenance dredging helps improve the inlet resiliency and avoid inlet closure. 11 Humiston&Moore Engineers Agenda item#5d-1 Page 3 of 3 2019 Clam Pass Management Review Pelican Bay Services Division 3. Inlet Dredging Cost Analysis As discussed above, Clam Pass is a small inlet and requires maintenance dredging to maintain the health of the Clam Bay ecosystem and avoid potential for inlet closure.The inlet has been dredged a total of 7 times since the development of the initial NRPA management plan in 1998. The dredging template and methods of dredging varied depending on conditions and timing of each event. Table 2 provides listing of dredging information and costs for each of the 7 events.The record indicates that 5 dredge events used hydraulic dredging equipment which enables dredging the entire dredging template including the interior flood shoal areas. Two events in 2013 and 2017 were limited to mechanical excavation equipment which included partial dredging of the template limited to the inlet channel and small part of section B of the flood shoal area. The limited excavation by mechanical equipment provided cost effective and rapid response to emergency conditions following inlet closure in 2012 and to avoid inlet closure in 2017. Table 2 Details of dredging events information and costs for Clam Pass Total Section A Dredge Pay Quantity Volume Construction equivalent Year (Includes grading)(includes Dredge Equipment Construction Cost Cost(2018$) grading) Width Depth based on bid tabulation (cy) (cy) (feet) (feet) A -5.0 NGVD 1999 B 32,000 30 -4.0 NGVD Hydraulic $ 321,030 $ 484,755 C -4.0 NGVD A ND 2002 B 11,725 -4.0 NGVD Hydraulic $ 162,125 $ 230,218 C ND A -5.5 NGVD 2007 B 20,603 80 -4.5 NGVD Hydraulic $ 376,417 $ 455,465 C -4.5 NGVD 2012 nlet Closes _ l A 13,008 -5.8 NAVD 2013 B 4,824 20,266 45 -5.3 NAVD Mechanical $ 233,411 $ 252,084 C 2,434 -5.3 NAVD A 9,366 -5.0 NAVD 2016B 3,368 18,987 50 -4.0 NAVD Hydraulic $ 469,000 $ 492,450 C 6,253 -4.0 NAVD A 10,994 -5.0 NAVD $ 85,303 2017 10,994 50 Mechanical B ND -4.0 NAVD $ 82,818 C ND -4.0 NAVD A 6,275 -5.0 NAVD 2018B 3,320 11,685 50 -4.0 NAVD Hydraulic $ 235,982 $ 235,982 C 2,090 -4.0 NAVD *ND indicates no dredgingoccurred In this section. As discussed in previous sections of this study, the inlet is critically stable under typical conditions and excessive shoaling is directly related to sequence and intensity of storms.The average interval between dredging events is 3 years.The largest interval between dredging events was 6 years between 2007 and 2013 which included inlet closure in 2012. Annualized cost over various time frames are shown in Figure 15. 12 Humiston&Moore Engineers Agenda item#5e Page 1 of 1 From: Susan OBrien <naplessusan@rcn.com> Subject: Steps and time needed to dredge Clam Pass Date: August 22, 2019 at 10:07:45 AM CDT To: Neil Dorrill <neil@dmgfl.com>, JacobLisa <Lisa.Jacob@colliercountyfl.gov> H Neil and Lisa, For the Clam Bay Comm. meeting on Sept. 10 I'd like to provide those in attendance with the recommended steps and approximate number of days/weeks needed for each step of the process to dredge Clam Pass. Let's assume that the tidal and bathymetric data indicate that Clam Pass needs to be dredged. Below are some suggested steps. I would appreciate your editing my suggested steps, including reordering them so they are in the right sequence, and estimating the number of days/weeks needed for each step. If I can provide additional information, please let me know. Thanks very much. Susan 1. Notify appropriate County staff. 2. Complete construction drawings. 3. Seek PBSD Board and PBF Board approval. 4. Begin required biological monitoring. 5. Submit construction drawings and other required information to FDEP and USACE for approval. 6. Seek TDC approval for funding. 6. Work with Procurement to put specs out to bid. 7. Review bids with Procurement and select contractor to recommend. 8. Seek BCC approval. 9. Seek required local permits. 10. Establish dates for dredging event with contractor. 11. Notify all interested parties. 12. Complete dredging. 13. Complete and submit documentation required by FDEP and USACE. 8/30/2019 Meeting Calendar-Collier County,FL Agenda item#5e-1 Page 1 of 4 Meeting Calendar RSS Displaying 26 meetings from 1/1/2019 to 12/31/2019 for Board of County Commissioners Date: 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, See More... Group: I Board of County Commi; • View: List I Calendar January, 2019 D Jan 8, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers El Jan 22, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting- Board of County Commission Chambers February, 2019 171 Feb 5, 2019 9:00 AM Agenda I Agenda Packet I I I BCC Workshop- Board of County Commission Chambers r:71 Feb 5, 2019 1:00 PM Agenda I Agenda Packet I I I BCC Workshop- Board of County Commission Chambers El Feb 12, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers El Feb 26, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers March, 2019 7) Mar 5, 2019 9:00 AM Agenda I Agenda Packet I I I BCC Workshop- Board of County Commission Chambers ri Mar 12, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers Mar 26, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers April, 2019 u Apr 2, 2019 9:00 AM Agenda I Agenda Packet I I BCC Workshop- Board of County Commission Chambers Ei Apr 9, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers El Apr 23, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers May, 2019 ® May 14, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers May 28, 2019 9:00 AM colliercountyfl.igm2.com/Citizens/calendar.aspx?Print=Yes 1/2 8/30/2019 Meeting Calendar-Collier County,FL Agenda item#5e-1 Agenda Agenda Packet Page 2 of 4 Regular Meeting - Board of County Commission Chambers 9 1 9 I I i June, 2019 Q Jun 4, 2019 9:00 AM Agenda I Agenda Packet I I BCC Workshop - Board of County Commission Chambers r Jun 11, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers El Jun 25, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting- Board of County Commission Chambers July, 2019 Q Jul 9, 2019 9:00 AM Agenda I Agenda Packet I I I Regular Meeting - Board of County Commission Chambers September, 2019 Sep 5, 2019 5:05 PM Agenda I Agenda Packet I I I Budget Hearing - Board of County Commission Chambers Sep 10, 2019 9:00 AM I I I Regular Meeting- Board of County Commission Chambers Q Sep 19, 2019 5:05 PM I I I I Budget Hearing - Board of County Commission Chambers rn Sep 24, 2019 9:00 AM I I I I Regular Meeting - Board of County Commission Chambers October, 2019 rn Oct 8, 2019 9:00 AM I I I I Regular Meeting - Board of County Commission Chambers ® Oct 22, 2019 9:00 AM I I 1 I Regular Meeting- Board of County Commission Chambers November, 2019 8 Nov 12, 2019 9:00 AM Regular Meeting- Board of County Commission Chambers December, 2019 E) Dec 10, 2019 9:00 AM Regular Meeting - Board of County Commission Chambers Powered by Granicus colliercountyfl.igm2.com/Citizens/calendar.aspx?Print=Yes 2/2 8/30/2019 Meeting Calendar-Collier County,FL Agenda item#5e-1 Page 3 of 4 Meeting Calendar RSS Displaying 11 meetings from 1/1/2019 to 12/31/2019 for Collier County Tourist Development Council Date: 2019, 2018, All Group: Tourist Development Cot • View: List I Calendar January, 2019 17 Jan 28, 2019 9:00 AM Agenda i Agenda Packet TDC Regular Meeting - Board of County Commission Chambers February, 2019 ra Feb 25, 2019 9:00 AM Agenda I Agenda Packet I I TDC Regular Meeting - Board of County Commission Chambers March, 2019 In Mar 25, 2019 9:00 AM Agenda I Agenda Packet I I I TDC Regular Meeting -Board of County Commission Chambers April, 2019 ® Apr 22, 2019 9:00 AM Agenda I Agenda Packet I TDC Regular Meeting - Board of County Commission Chambers May, 2019 May 30, 2019 9:00 AM Agenda I Agenda Packet I TDC Regular Meeting - Board of County Commission Chambers June, 2019 ® Jun 24, 2019 9:00 AM Agenda I Agenda Packet I TDC Regular Meeting - Board of County Commission Chambers July, 2019 ( Jul 29, 2019 9:00 AM Agenda I Agenda Packet I I i TDC Regular Meeting - Board of County Commission Chambers September, 2019 171 Sep 23, 2019 9:00 AM I TDC Regular Meeting - Board of County Commission Chambers colliercountyfl.igm2.com/Citizens/calendar.aspx?Print=Yes 1/2 8/30/2019 Meeting Calendar-Collier County,FL Agenda item#5e-1 Page 4of4 October, 2019 ri Oct 28, 2019 9:00 AM I I I I TDC Regular Meeting - Board of County Commission Chambers November, 2019 ma Nov 25, 2019 9:00 AM I I I I TDC Regular Meeting -Board of County Commission Chambers December, 2019 EI Dec 23, 2019 9:00 AM I I I I TDC Regular Meeting - Board of County Commission Chambers Powered by Granicus colliercountyfl.igm2.com/Citizens/calendar,aspx?Print=Yes 2/2 Agenda item#5e-2 Page 1 of 8 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver. 6.5 5.0 Clam Pass Dredging A. Dredging Policy There are two circumstances that could necessitate dredging Clam Pass. 1. Clam Pass closes or is in imminent danger of closure following a weather driven event. In this situation the inlet should be dredged as soon as possible. 2. The inlet has lost hydraulic efficiency and is jeopardizing the long-term health of floral and faunal communities of the Clam Bay NRPA. The scope and timing of any proposed dredging activity will be determined by reviewing and comparing current and past 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. Beach-compatible sand removed as part of the dredging event will be spread on adjacent area beaches, as required by the permitting agencies. B. Hydraulic and Bathymetric Dredging Criteria The purpose of regular hydraulic and physical 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, data on the variables listed below will be regularly collected and reviewed by qualified engineers. If data are not within the identified target ranges for the variables, further monitoring and/or intervention will be considered in conjunction with current ecological data. See Appendix 5 for additional information on the dredging criteria. 1. Bay Tide Range 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. 43 Agenda item#5e-2 Page 2 of 8 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver. 6.5 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 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. ! - ; Section C • Section A :,:,. . ilk, .. , . . . • t.... . 4 Y ' ll/.. , \it. . . 1 f tiO�� . i .., . Figure 20: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 44 Agenda item#5e-2 Page 3 of 8 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Vet 6.5 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. Targets for the average cross-section of flow areas below MI1W: 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 of flow areas below MHW: 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.yds. Section C less than 4000 cu.yds. Therefore, if the average cross-section of flow area falls below these numbers or the volume of shoaled material exceeds these numbers, further monitoring or intervention may be needed. 3. Inlet Channel Length 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. 45 • Agenda item#5e-2 Page 4 of 8 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver. 6.5 To determine a target for the ebb shoal delta, data from April 2013 to April2014 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. A summary of criteria for dredging is presented in the table below. Dredging Criteria Parameter Summary Location Target Description Bay Tide Range Ratio >0.6 ratio comparison of the interior and Gulf tidal ranges A Average>300 sq ft Not less than 250 sq ft Cross Sectional Area B Average>450 sq ft area in different locations of the Pass Not less than 350 sq ft through which water can flow Average>450 sq ft Not less than 350 sq ft A <3000 cu yds Volume of Shoaled Material B <2500 cu yds quantity of sand and sediments within C <4000 cu yds channel that can restrict flow Inlet Channel Length <400 feet distance water must flow through the beach and ebb shoal areas Ebb Shoal >250 feet distance from shore to the outer ebb shoal limits C. Ecological Considerations A critical consideration in all dredging decisions is to ensure the ecological health of the Clam Bay NRPA. Before any dredging event, the direct and indirect impacts 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 considered. Every effort will be made to minimize any negative impact to the flora and fauna. The pros and cons of dredging will be weighed in regards to both hydrologic and ecological consequences. D. 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 permitting. Typical cross-sections are shown for open areas in Sections B and C where the waterway 46 Agenda item#5e-2 Page 5 of 8 CLAM BA YNRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver. 6.5 is wider than the target cross-section. In areas where the waterway is lined with mangroves appropriate buffers will be established. Where the substrate surface is shallower than-2' MHW a minimum of a 15' buffer from the mangroves will be maintained. Where substrate surface is deeper than-2' MHW a minimum of a 5' buffer from mangroves will be maintained. Post-dredge monitoring of mangrove impacts will be conducted to determine if these minimum buffers should be modified for future dredging events. If changes to these buffers are proposed in pre-dredging plans a biological review will be conducted to ensure potential mangrove impacts are minimized. Where seagrasses may be present every effort will be made to avoid dredging activities that would be harmful to seagrasses. 2013 Target Proposed I Dredged Area Design .3 Area area ' I r 1 • Below 312 300 300 .,.,,i MHW , f k:i. " SECTION A - TYPICAL 1 ,Ii 6- noon a '' .p. 4- Z2_ �r...- is, `-. -MHt4 (4.0,33.) D_ r. l —2— Z 51X2OPE IV:IH �-yi a - _mow CUT(-LO'YAVO) -6- --._ 701!1ELPUIE( 0.I'MAYO) W-8- -_.50•_-- -10- - NORTH SOUTH -12 , -200 -150 -100 -50 0 50 100 150 200 DISTANCE FROM CENTER (FEET) Figure 21: Typical maintenance dredging cross-section-Inlet Channel- Section A (figure provided by Hermiston& Moore) 47 Agenda item#5e-2 Page 6 of 8 CLAM BA YNRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver. 6.5 2013 Target Proposed Dredged Area Design ; ► _ Area area Below 650 450 450 I` MHW lie. , a SECTION 8 - TYPICAL 6 y \ •,7 . a _ I k .: .:-.. 4 12- 41 j •NHW (4.0.33) g \\ -2- A SIC014'L MIN Z F -4- —NINO CU1(-air II t - __ _20I mnert(-e.e'Iwo) -6 W _ 100' -e- -10- - NORTH SOUTH -' -200 ' -150 ' -100 ' -50 ' 0 ' 50 ' 100 ' 150 ' 200 DISTANCE PROM CENTER (PEET) Figure 22: Typical maintenance dredging cross-section—Seaward Flood Shoal—Section B(figure provided by Hermiston &Moore) 48 Agenda item#5e-2 Page 7 of 8 CLAM BAY NRPA MA NA GEMENT PLAN Pelican Bay Services Division October 2014 Ver. 6.5 Cubic yards 2013 Target Proposed Dredged Area DesignS(CIION C :`• Area area ,. Below 530 450 450 MHW • o e 6 SECTION C - TYPICAL el 1 2 b ullw(.o.ss) _...\__a b--2 3C0lOn Imn I g-8- _ —'Co.'-a -to NORTH SOUTH -12 -200 -150 -100 - 0 I 50 1.0 1 0 210 DISTANCE FROM CENTER (FEET) Figure 23: Typical maintenance dredging cross-section—Bayside Flood Shoal—Section C(figure provided by Hurniston & Moore) 49 Agenda item#5e-2 Page 8 of 8 CLAM BAY NRPA MANAGEMENT PLAN Pelican Bay Services Division October 2014 Ver. 6.5 6.0 Authorized Construction Activities The Management Plan, after approval by the PBSD and the BCC,will become an integral part of future dredging and other relevant permit applications. 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 important 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. { 50 Agenda item#6a Page 1 of 1 Clam Bay Copper ug/L Collection Date CB1 CB2 CB3 CB4 CB5 CB6 CB7 CB8 CB9 Report Date 6/22/2016 0.862 0.700 0.700 0.700 1.640 2.100 0.700 3.520 1.510 9/8/2016 7/20/2016 0.924 5.330 5.110 5.660 2.470 3.960 4.950 5.710 10.500 9/12/2016 7/20/2016 0.924 6.160 4.700 1.690 2.470 1.830 1.980 1.870 8.360 9/21/2016 8/25/2016 2.000 1.850 1.680 1.470 1.240 1.520 2.250 1.280 8.060 10/4/2016 9/20/2016 1.690 2.280 1.280 1.760 0.751 0.700 0.700 1.030 0.700 11/22/2016 10/12/2016 2.760 2.200 2.130 1.190 2.900 1.860 1.060 0.954 1.310 12/7/2016 11/9/2016 2.340 3.390 2.300 2.250 1.630 1.500 1.180 2.030 1.300 1/16/2017 12/6/2016 2.330 2.930 5.100 2.450 2.390 1.780 1.270 1.880 1.720 3/14/2017 1/19/2017 2.570 3.560 2.110 1.990 0.818 0.800 0.961 1.110 2.020 4/4/2017 2/23/2017 2.510 3.350 1.600 1.120 0.851 0.848 1.500 2.570 2.600 4/24/2017 3/21/2017 7.970 4.080 1.710 1.120 0.894 0.846 1.080 1.090 0.957 6/1/2017 4/18/2017 6.480 8.160 1.620 1.240 0.800 0.956 1.280 1.010 1.100 6/14/2017 5/24/2017 2.840 4.060 4.990 0.800 0.800 0.959 0.800 0.920 0.946 7/6/2017 6/21/2017 3.840 4.240 3.850 0.906 1.200 1.140 1.260 1.110 0.760 8/8/2017 7/13/2017 4.700 2.950 3.800 4.080 2.500 2.440 2.370 2.380 2.210 8/29/2017 8/14/2017 4.290 3.810 3.220 2.650 1.400 1.220 1.470 1.020 0.700 10/10/2017 10/4/2017 2.680 1.270 0.600 0.800 12.600 1.610 0.600 0.600 1/22/2018 11/28/2017 0.700 0.722 2.540 0.700 0.700 0.700 0.700 0.700 0.700 1/22/2018 12/12/2017 1.780 2.250 1.890 0.700 1.210 1.210 1.300 0.728 0.911 3/26/2018 1/8/2018 0.420 1.510 1.690 1.590 0.800 0.809 0.800 0.800 2.400 4/27/2018 2/6/2018 3.400 3.980 2.130 2.420 0.829 1.640 3.920 0.800 0.800 4/30/2018 3/22/2018 5.450 4.890 3.670 2.370 1.010 1.040 1.750 1.010 1.320 5/11/2018 4/4/2018 2.370 3.190 2.380 1.970 1.690 0.848 1.280 1.250 5.160 6/11/2018 5/8/2018 5.490 4.880 2.360 1.090 0.800 1.050 1.270 1.570 1.640 7/2/2018 6/6/2018 3.120 3.320 2.670 0.800 0.800 0.853 0.828 1.080 1.220 7/18/2018 7/17/2018 1.400 1.440 1.600 1.600 2.270 1.600 1.600 1.600 1.600 8/21/2018 8/15/2018 1.500 1.410 1.400 1.400 1.600 1.600 1.600 1.650 1.600 10/8/2018 9/13/2018 1.720 1.960 1.200 1.200 1.400 1.400 1.400 1.600 1.400 10/9/2018 10/15/2018 3.190 4.800 4.400 4.030 1.400 1.400 1.960 1.400 1.400 12/21/2018 11/14/2018 1.750 1.900 1.960 1.600 1.600 1.600 1.600 1.600 1.600 2/28/2019 12/12/2018 4.480 2.790 2.400 1.820 1.600 1.600 1.600 1.600 1.600 2/28/2019 1/14/2019 3.150 2.740 2.100 1.880 1.600 1.600 1.600 1.600 1.600 5/3/2019 2/25/2019 3.420 2.470 2.000 1.940 1.600 1.600 1.600 1.600 1.600 5/3/2019 3/25/2019 1.830 3.090 1.600 2.730 1.600 1.600 1.600 1.600 1.600 5/14/2019 4/11/2019 2.310 2.530 1.720 1.910 1.600 1.600 1.600 1.600 1.600 8/8/2019 5/9/2019 2.290 3.160 2.030 2.720 1.600 1.600 1.600 1.600 1.600 8/8/2019 6/25/2019 3.030 2.460 1.720 1.600 1.600 1.600 1.600 1.400 1.450 8/8/2019 Agenda item#6b Page 1 of 2 period, and if the frequency of exceedance seen here was to be maintained over the course of a calendar year, Clam Bay would likely be determined to be impaired for TP. The TN and TP exceedances are illustrated in Tables 1 and 2. While the TP exceedances during this quarter are numerous, and are consistent with the widespread elevated concentrations noted in the 2018 annual report. Since July 2018, TP concentrations have been elevated throughout the entire Clam Bay system. This widespread pattern of exceedances had been suggested to be related to tree defoliation and excessive rainfall and runoff associated with Hurricane Irma. After Hurricane Charley hit Southwest Florida in 2004, widespread defoliation of vegetation brought about impacts to water quality throughout both Charlotte Harbor and the Peace River watershed (Tomasko et al. 2006). However, the persistence of TP exceedances more than a year after the passage of Hurricane Irma is not consistent with the shorter-term impacts that were recorded after the passage of Hurricane Charley (Tomasko et al. 2006). Table 1. Observed TN Exceedances (marked with an "X") at the ambient Clam Bay surface water sample sites over the period of November 2018 to January 2019. Table extended to show 12 months of data required for an annual assessment. Sampling event Station Nov Dec Jan FebMar Apr May Jun Jul Aug Oct` 1 2 3 X 4 5 6 X 7 _ 8 9 X Table 2. Observed TP Exceedances (marked with an "X") at the ambient Clam Bay surface water sample sites over the period of November 2018 to January 2019. Table extended to show 12 months of data required for an annual assessment. Sampling event Station Nov Dec Jan Feb Mar Apr May Jun Jul Aug Oct 1 X X X 2 X X X _ 3 X X 4 X X X 5 X X X 6 X X X 7 X X X 8 X X X 9 X X X 5 Agenda item#6b Page 2 of 2 Table 1. Representation of frequency of impairment for TP for different site and date combinations. Green represents samples in compliance with criteria. Red cells indicate exceedance of criteria. Red cells with an "X" represent values that are within 5%of criteria concentrations, suggesting lack of compliance should be interpreted with caution, due to analytical precision. Clear cells represent a lack of data. Sampling Station Event 1 2 3 4 5 6 7 8 9 Mar-15 -_ Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15 Jan-16 Feb-16 Mar-16 Apr-16 May-16 Jun-16 Jul-16 Aug-16 Sep-16 Oct-16 Nov-16 Dec-16 Jan-17 Feb-17 Mar-17 Apr-17 41.1111111W May-17 Jun-17 Jul-17 Aug-17 Oct-17 Nov-17 Dec-17 Jan-18 Feb-18 Mar-18 Apr-18 May-18 Jun-18 Jul-18 Aug-18 Sep-18 Oct-18 7 Send all Invoices to: Agenda item#7a Pa e1of1 Collier County Board of County Commissioners t.r,� Collier County Board of County Commissioners Procurement Services Division G - +A Attn:Accounts Payable Phone:239-252-8407 3299 Tamiami Trl E Ste 700 Fax: 239-732-0844 ., e -L Naples FL 34112-5749 Tax Exempt:85-8015966531C-1 °us's, OR email to:bccapclerk@collierclerk.com Purchase Order number must appear on all related correspondence,shipping papers and invoices: Vendor# 119142 Purchase order EARTH TECH ENVIRONMENTAL LLC PO Number 4500197196 nate 08/07/2019 10600 JOLEA AVENUE Contact Person Pelican Bay Div BONITA SPRINGS FL 34135 Telephone 239-597-1749 Fax 239-597-1749 Please deliver to: PELICAN BAY SERVICES DIVISION Delivery Date: 09/30/2019 801 LAUREL OAK DR, STE 302 NAPLES FL 34108 Terms of Payment Net 30 Days Item Material Description Order Oty Unit Price Per Unit Net Value 00010 CON-Hand-dug Channel Mntc. 38,950 EA 1.00 38,950.00 in Clam Bay Total net value excl.tax USD 38,950.00 VENDOR Terms and Conditions The VENDOR agrees to comply with all Purchase Order Terms and Conditions as outlined on the Collier County Procurement Services Division site: https://www.colliercountyfl.gov/home/showdocument?id=74077,including delivery and payment terms. Further the VENDOR agrees to: 1. Provide goods and services outlined in this Purchase Order with the prices,terms,delivery method and specifications listed above. 2. Notify department Immediately if order fulfillment cannot occur as specified. 3. Send all invoices to: Collier County Board of County Commissioners Attn:Accounts Payable 3299 Tamiami Trl E Ste 700 Naples FL 34112-5749 OR email to:bccapclerk@collierclerk.com The Purchase Order is authorized under direction of Collier County Board of County Commissioners by: Edward F.Coyman Jr, Director, Procurement Services Division Printed 08/07/2019 @ 08:00:40 320-183800-646319-51100.1 Page 1 of 1 NIEDEM• 1111=18 II 12:01132R. CEEEMEN ' saloN -j i n,xq•i wpa s.xq . .-^1/4" • •1• less eeS Pawre-.01 4..0 s'al U epiuolj . •'• -`�i %:.. 1 Li .� r -`r r mazLVum v . '. .>r ram �o. r • i ._. P- qo , wn:asg0 D < X - sserae leo S In or%a,;w'Paa MEMEN■ a:"7, 71 S -i ti Iliquo•• Q4.50, - .h! P.,..16•'., pin:xFln _ _. » ; 1=9;a9 uJJaF{pa�olJa.l �L]. _ 7. !7f• �� Nilt Pn ■ r''''„'o'El -- ,•�:r-.:.3, .....jt. ,11..1;\7:71a u14nad �j vas ,� ' - _ „.y \ Fl �a qvp paniasq•�. - , 0 ..1.� +p llama '�it,Lklr� r anoQ.uisunoW l.� ��''�11 MIZZ=■ pan�asgo■ PaNa'5U 0 Ir ® �.:.z Peays'�aa5S .j s,...1-1.,-,10 vows ,410-_ 7< f `. I L 40 'ssed tap punoue �,,. 4 • io keg we u!panJasgo up uel eunej rg eiog asagt jo sly'uols-mxa .Inok uo aas no/ Tey', Ayeuapi os rnolaq syde.J8o;oyd app asn pavasq) .j. . �,. '45,,..P',, • ileal aouE^► • �Jo] •o0M ,1b8 WV1D Welcome to the Clam Bay canoe trail. Trail markers begin at the Foundation public canoe ramp,adjacent to the Naples Grande Resort and finish at#32 in Upper Clam Bay. The Foundation makes canoes available to • Pelican Bay residents/guests along the north boardwalk at marker#26. Obtain life jackets and paddles from vow �- _ the security guard atTram Station#6 at the start of the ' north boardwalk.Equipment is available from 8:00 am to . r 0 noon and 1:00 pm to 5:00 pm.All equipment must be returned by 6:00 pm. This brochure has been designed as a trail map and brief field guide for the mangrove estuary.We hope you enjoy your trip and come back again! CLAM BAY , Canoe Trail Please take note of the safety information below before you set out.. V S INFORMATIVE GUIDE • Do not stand up in the canoe!On entering,steady the canoe with hands on either side and place your PI weight in the middle. • Everyone should have a life jacket on board and children must wear them at all times. _. '.” • Don't forget water,sunscreen and bug spray.Take a cell phone if you have one. • Almost the entire bay system is shallow enough to 410 stand if the canoe tips. Be aware that the substrate _ , is often soft mud. 411 • It can be difficult paddling against the wind across - - the bays-plan your trip with this in mind.Tidal '' _ flows can be strong,especially close to Clam Pass, . • Feeding or harassing any wildlife is prohibited. • Please be aware that alligators are present in Clam For more information contact ,, 0 . . Bay waters. • Watch out for spiders overhead in the creeks.The Pelican Bay Services Division crab-like spiny orb weaver has a bite but is not 801 Laurel Oak Drive,Suite 302 dangerous. • Follow the trail markers and check the map to Naples,FL 34109 determine where you are. It's hard to get lost in Phone: (239)597-1749 Clam Bay but please remember-don't leave the pass into the Gulf of Mexico;even a light chop can Pelican Bay Foundation flip a canoe quickly. (for canoe information) • Have Fun! (239)597-8877 � ,,, , , .1, y, .. CLAM BAY r T,Car,, Canoe Trail ",e*% s. • r �^� < r INFORMATIVE GUIDE / AV-^ ��' This 570 acre estuary system was deeded to Collier County by the developer in the . ,' sCi. k' late 80's,and together with the County,the Pelican Bay Services Division oversees its r`1 - health. Every year reports are prepared assessing the health of the system including: a © - • .`, �r bathymetric monitoring report water quality report,and a biological/ecological report. r -4F 1• rtt� 1111110114. - `1.4111111111111111.111111111.11 # ii stire V. ..'• 14104t, : ,-1 .4 4 i laki. - a 74,,-,,-i-I '.•:_..„,,i,:-.L..::/ii k.".,!. t q . ,.,, y y`,..--. it k. -Lv ••t Three species of these salt tolerant trees are found in coastal Florida.Mangroves protect the At •ti' \ coast from storms and erosion,provide rich feeding grounds and nursery areas for marine .` animals and are the starting point in highly productive estuarine ecosystems. Because of - - their importance they are a legally protected species. cim 0 _ • The red mangrove (Rhizophora mangle) grows closest to the en •2 X#•' waterways and has a tangle of '-riti i r''_ ,� supporting prop roots,shiny dark green leaves and distinctive ��S �i ._ 'i,V 'N.i propagules(seeds). .er i ,, t `* , ` 't'�j�. 7 Black mangroves(Avicennia gernninans)have leaves with silvery r � ���-�. �e„,.._, undersides,straight trunks and pneumatophores,which are like _-- underground snorkels sucking in air to cope wrh the low oxygen ,y • '7"./WO I• in the soil. I- • e - - White mangroves (Laguncularia racemosa) possess slightly OD ' rounded,pale green leaves with characteristic nodules on the stem ---- ' that excrete salt Also associated with mangrove systems is the r buttonwood(Conocarpus erectus),which found in dryer areas. • 2 ^-R .. -%„---. Submerged open areas of mud and sand In the channel south of Clam Pass, sea- ` m s«e l«ro.,u ` �' t7 `' '-" are common in estuaries and are often grasses bind the substrate and provide a 9 marked at low tide Cl- rich, productive s- by wading birds and safe nursery m i l AZ, 'itt'' picking through the area for young • rich invertebrate 0. Q � ,� marine animals.}�"}i' inhabitants. Three important ' M., 'P^-^' Shellfish crawl on species are • ,yj�jty�� the surface or lie buried within the mud, found in the Clam Bay system:shoal grass 0 poking out their siphons to filter seawater for (Halodule wrightii)with small,flat strap-like �'y food and oxygen. Worms build protective leaves;turtle grass (Thalassia testudinum) _,. , tubes and filter small food particles or crawl with large strap-like leaves, found in 0 li 0,40through the sediment hunting for even deeper water;and paddle grass(Halophila 5 smaller creatures to eat Look out for: decipiens) with paired oval leaves.These rri i- Florida fighting conch fragile and light-dependent true grasses NitMud snails on the surface are sensitive to water quality and physical w�41h.E , ' r • Shells of the tellin or angel wing, disturbance.All boat traffic must stay close .41F'S � '' ? buried in the mud to the marked trail.Florida's once abundant YL�'i r...;41.!..... ' Parchment tube (a white papery• 'i� ,��,,w p p y seagrass meadows have been badly `. « . _ tube) impacted by prop scarring and degraded O GRoe�,.ARKER.cunonsm, -- � Sand mason worms (tinypieces '�NT•• ten.•,..R.., aY �Y ��,� water quality.Please also try not to wade in a..n..o•.nm.e..« Say 0 y'.Q;•4, • of cemented sand)peeking out of the grass areas. o..ne«....R ��� — s.` ,) the surface PELICAN.. v R. .�..=� uv�lYewnes y5 a..e. <i mean •..Mao•u..m rover ' O. .^.rr �. x:.-_' Se w.on.e +.�A I There are 32 total canoe trail makers. .. .«, r er«e«,.y 1r The distance from Marker#I to Clam Pass is approximately I mile(one way). al.rta,«.MM I '""""' •� r..ww«a«« p, The distance from Marker#Ito Marker#32 is approximately 3 miles(one way). Agenda item#7e Page 1 of 1 Many have watched as canoes and kayaks move about in Clam Bay and wondered if they would be able to get around themselves. Pelican Bay Services Division has updated and enhanced a spiffy guide to the Bay with recommended route, identification of each of the signposts and photo identification of many of the birds and other animals you might meet on your ride. There are 32 canoe trail markers and one trail is only one mile, one way. If you chose to cover the bay's entire 32 markers,you would travel 3 miles, one way. Another feature of the map is a listing of some of the worms and crabs who inhabit the mud flats.These creatures provide aeration for the soil and food for birds. Finally,the seagrasses are identified, and canoers are advised to stay clear of these fragile ecosystems as they are nurseries for young marine animal. Florida's once abundant seagrass meadows have been badly impacted by propeller scarring and would be further damaged if someone waded on them. Canoes and kayaks stored along the north boardwalk can be checked out at tram Station#6. There are also kayaks available for checkout at the south beach. The new brochure is available at the Commons as well as at the security check points along the berm particularly where the life vests are located. Please enjoy and encourage passive canoeing use of Clam Bay as it will help educate our neighbors about our treasured wetland. Bay Colony Beach Dune Swale A project to restore drainage to the Bay Colony beach dune swale located in Bay Colony between the beach and the hi-rise condominiums starting at the Beach Club and ending at the Contessa, has been approved by the South Florida Water Management District (SFWMD). Fortunately, SFWMD also determined that PBSD did not need to obtain an Environmental Resource permit which would have taken another six to twelve months and expense. A swale is a surface water drainage device, like a ditch but it is broad and shallow with gently sloping sides and usually covered or lined with vegetation. This swale carries water from south to north, into Clam Bay, and ultimately flows into the Gulf of Mexico. The natural contours of this swale are steeper than most adding to the complexity. These swales were part of the original permits that allowed Pelican Bay and its various subdivisions to be built and the covenants must be strictly adhered to. The Pelican Bay water management berm has a swale on each side, carrying fresh water along to the weirs or pipes which manage the flows into the mangroves. Maintaining water on the freshwater side of the berm allows more filtration of water into the drinking water aquafer below and manages the amount of fresh water entering the wetlands. Some think the berm was built to give us wonderful birdwatching, walking to the beach and exercise, however, the berm provides vital flood management and water management. In Bay Colony, through the years, invasive species of plants have taken hold and must be removed carefully in order to protect the delicate native plants and creatures which would otherwise be crowded out. Because of the steep vee shape of the land, siltation has also occurred. It is a largely manual effort for experienced and licensed environmental engineers with full knowledge of the vitally important native plants to identify and remove the invasive growth without damage to the desirable natives and without violating water quality regulations. They will also make modifications through digging to remove excess soil which has entered the swale. This should also reduce the flooding events currently being experienced in the area. The work will commence as soon as the project is bid out through Collier County. Preliminary work has been underway for over a year. Budget for this work was approved by the PBSD Board as part of their annual budget. For more information on the progress of this project, attend a Pelican Bay Services Board meeting or the PBSD Water Management Committee. This article will be accompanied by the attached document showing the length and breadth of the swale. Channels through the Mangroves sent to Lisa 8/5/2019 There are thirteen miles of channels through the mangroves of Clam Bay. These channels ensure that sea water flows through the mangroves and drains back into the Gulf leaving the right amount of salinity for our mangroves to thrive. The construction of the hand dug flushing channels was done in 1998 allowing the mangroves to reestablish after a severe die off. There was concern expressed in the Clam Bay Committee meetings in 1999 that the problem was the excessive amount of fresh water and fertilizer running in to the mangroves. The problem went on to be diagnosed as insufficient saltwater from the gulf getting through to the mangroves. In 1998, starter islands were created and planted with additional mangroves to reinvigorate decimated areas. Over time and with constant attention, the mangroves recovered, grasses reestablished, and crabs returned and burrowed into the soil aerating it and bringing a healthy mangrove watershed. After Hurricane Irma, there was devastating destruction stripping most of the leaves off the branches and breaking many Mangrove branches. Among the action items that were immediately put in place was an extensive clearing of fallen trees which were blocking the channels. Today, there is a map of all those channels. Annually, EarthTech, a consultant hired and managed by the Pelican Bay Services Division (PBSD), walks through the targeted channels removing any significant obstruction — and any plastic bottles, cups and other people related paraphernalia that has blown there. The process is manual, using a shovel to maintain the twelve-inch depth. This year an additional 2 1/2 miles of hand dug channel maintenance will be concentrated in the TH-5 area which is located in the north eastern quadrant of the mangroves. These are in areas either declining or not improving. The work will be done by County exotic removal contractors. Downed trees are generally left to naturally decay. Drones and aerial photographs are also used to diagnose and track specific sectors where mangroves are failing to thrive. These are only a few of the tools used to maintain and enhance the health of our vital and beautiful mangroves and Clam Bay under the Clam Bay Natural Resource Protection Area (NRPA) Management Plan process begun in 1998 and reviewed and updated in 2014. The process is dynamic and continuously under review, but the result is evident to all as we walk the berm and boardwalk or look out from our lofty windows upon our beautiful, natural resource. For more information or detail on this project, attend a Pelican Bay Services Division meeting or the PBSD Clam Bay Committee meeting. Collier County's Fertilizer and Urban Landscaping Ordinance passed July 9, 2019 requires that NO fertilizer containing phosphorus be applied without a soil test. Excessive phosphorus is a pollutant causing algae and potentially harming the Clam Bay Natural Resource area. There are enforcement provisions within the ordinance. The person applying your fertilizer must have a license certifying his/her knowledge. The Landscape Committee of your Board, or the condo manager or the person managing the vendor should ask the appropriate questions to be certain your soil has been tested and the results require fertilizer augmentation. Soil samples should be analyzed at the OF/IFAS Extension Soil Testing Laboratory (ESTL; http://soilslab.ifas.ufl.edu) or other reputable laboratory. The ESTL uses soil test methods that were developed specifically for Florida soils. Additionally, OF/IFAS fertilizer recommendations are specific to the soil tests offered through the ESTL, which is important when interpreting the results. Soil samples being submitted to the ESTL should be accompanied by a completed Landscape & Vegetable Garden Soil Test Information Form (EDIS publication SL136 http://edis.ifas.ufl.edu/SS187) and the associated test fee should be paid by an enclosed check or money order. The ESTL offers two soil tests for the home landscape and vegetable garden. Test A ($3) includes soil pH and lime requirement analyses; Test B ($7) adds analysis of phosphorus (P),potassium (K), calcium (Ca), and magnesium (Mg). The ESTL does not test soils for nitrogen(N). A reliable N soil test does not exist because the chemical forms of N in the soil are constantly changing due to Florida's warm and humid climate. For more information google "Collier County's Fertilizer and Urban Landscaping Ordinance" which is on the county website and has many informative links. The Pelican Bay Services Board, Water Management Committee brings you this reminder because the water that flows from your lawn, reaches Clam Bay and the Gulf and affects our environment. https://www.colliercountyfl.gov/your-government/divisions-s-z/zoning-division/watershed- management-plans/collier-county-florida-friendly-fertilizer-ordinance source of info and image Duckweed Algae in Pelican Bay There are red and blue algae that impact the Gulf and the Caloosahatchee river and receive lots of press coverage and research to determine their effect upon people.This note is about a different algae, Duckweed, which is not toxic to people. In Pelican Bay, and other similar developments throughout Florida,there are several types of algae that are a concern because of esthetics and the impacts on smaller life forms in our lakes and waterways. There is duckweed in the swales along the berm. Duckweed looks like small round green peas. Common duckweed (Lemna minor) is a spreading aquatic plant that deprives ponds of oxygen and leads to the death of fish and beneficial algae in still waters. One duckweed control method is raking or skimming it off the pond's surface, however, the reeds and grasses at the edges of the pond hide some duck weed that will quickly return. Duckweed typically prefers stagnant and slow-moving water. Aeration systems substantially eliminate Duckweed where they are feasible. In most of Pelican Bay's lakes, we have operating aerators which bubble the cooler water from the bottom of the lake up to the top and maintain motion. The conditions of the water along the berm are not aerator friendly nor would the aquatic and amphibian creatures appreciate this intrusion. Duckweed is most often found in nutrient rich ponds,those where a buildup of leaves on the bottom creates stratification. Black, smelly ooze or muck is a primary source of food for duckweed.The most effective and safest way of controlling duckweed is prevention. Natural ways of controlling duckweed can eliminate or reduce the need for chemical treatments, which may be required. The team is aggressively watching and monitoring algae and treating and adapting the treatments as necessary. This is one of the reasons we ask all landscapers to keep cut grasses out of the ponds. If you google duckweed, you may find it being sold as a biofuel,to prevent mosquitos, as a food for fish and humans. Some even sell it to prevent algae growth. For more information about Duckweed and the treatments used in Pelican Bay, attend a Pelican Bay Services Division Board meeting or the PBSD Water Management Committee meetings where we will be reviewing the top concerning algae areas and on-going treatments each month. 4400 4 ,s4or Source: Wikipedia -0 CT rn v - In V) L L L C 4) C C ✓ so ap aA c 0 0 o a Q Q .3 0 0 Lr, CAL.- 0 O 4- i--, C C -, O 0 E a-� L a CO W U -0 W ._ :O n 0 co : U H 0 x x 0 Q L 4) O N 4 C LO 4) O 4-, CO _U 7- : V) Q x x to 01 7 0 Q O }' (N A o-) _ m Cr) C C _o co _c C O a4 cn m x x x (o h0 J O U Q 2 LA CU " v) u 4) CO C N CU J a ..0 >-. 4) •--' v- ) C 3 x x x a) 3D U C C a' O Q i Q 4-_-, O 4-, u) CO m N -0 a--, o c) Ln C oc = x x x x x U O0 TU.- O a O ii v 0 O co M O C a--+ 00 2 d LL = X X X X X a-) a--+ 0.1V Q E O U x x x x x x x O CO 4- co a x x x x x x x Q 4— C to 0 v 0 CC con Uz U +. to C (D CM i p hn 4CU 4) " D O o O 1 in o Q in Y �) o > •> N c ' E ru aA = -o „ = i.nn3 4, m o a) a N coo d Can u CC a Cb. ca ) L m L — = L .__ a c0 an U 4) 4) O C .N m v Q) - CO >@ C >- U (O i `1 ca Q s- U '0 (>D �D @ 4J 4J >.... -- N m > U m 0 U LL J C' CO d Lr) (4i1) F- > v) Z Ln U 0 O U m V) r- N m Ln LO r co co-, EXHIBIT A SCOPE OF WORK PARK SHORE BEACH NOURISHMENT COLLIER COUNTY, FL MAY 2019 Introduction This is a scope of work for Aptim Environmental & Infrastructure, LLC (APTIM) to provide the engineering services described below to support the County in preparing the design, plans and specifications, bidding, construction & permit documents for conducting a truck haul beach renourishment project on Clam Pass Park (R42-R43), North Park Shore (R44-R48) and Park Shore (R49-R54) beaches. This proposal contains the tasks necessary to bring the project through construction. APTIM will assist the County in preparing for construction by conducting analyses to determine project extents and volumes, producing construction plans and technical specifications, conducting permit required MHW survey in Clam Pass Park, coordinating with FDEP for Notice to Proceed, and providing bidding assistance to the County.APTIM will support the County's inspection efforts during construction and will develop the post-construction certification based largely on the surveys, reports and observation of the contractor and the County during construction. Desian. Construction Plans & Specifications APTIM engineers will perform engineering analysis to determine project extents and estimate volumes needed. The goal of the design will be to place material so that the project area will be able to absorb 5 to 6 years of typical erosion in order to last until the next major nourishment project, barring any major storm events. The design will be based on the matrix design method updated with the latest composite erosion rate and 2019 annual monitoring survey. After review of the preliminary volume estimates, an analysis will be conducted to optimize placement areas and volumes. APTIM will finalize the quantities and fill areas based on consultation with Collier County and permitting agencies. APTIM will support the County with up to 3 coordination meetings related to the project with local stakeholders. APTIM will consult with permit agencies, Pelican Bay and their consultants, about the newest permit conditions. This will include Specific Conditions described in the November 2017 FDEP Permit No. 0331817-004-JM., which include • Design reduced fill template at Clam Pass Park(paragraph 1.a.) • Fill history and incremental volume analysis(paragraph 1.b.) • Refine beach design to avoid or minimize hardbottom impacts based on the latest physical and biological monitoring surveys. Once the target volumes and placement areas have been approved by the County, APTIM will conduct engineering design work to prepare the construction templates. APTIM's GIS/CAD professionals will work directly with APTIM engineers to update the construction plans including plan views and cross-sections of project areas, beach access, equipment storage areas, environmental protection areas and other information required for execution of this project. Aptim Environmental&Infrastructure, LLC The construction plans and volumes for bidding will be based on the 2019 annual physical monitoring surveys provided by a third party. Technical specifications developed for the project will integrate the QA/QC plans, environmental standards, and permit conditions into the work. APTIM will assist the County in preparation of the environmental protection plan, which will be integrated into the bidding documents APTIM understands that time is of the essence on this truck haul renourishment project and will have plans, specifications and bidding documents prepared by 7/1/2019 to allow beach renourishment to begin by 11/1/2019, provided that required documentation such as survey data from others and County approvals are received in a timely manner to proceed with the work. '.1HW Survey A mean high water line survey will be collected from Clam Pass south to the terminus of the existing 2004 Erosion Control Line near FDEP range monument R-44. Prior to the field survey, coordination with the Division of State Lands is necessary to receive authorization to conduct the mean high water survey. Once authorized,the mean high water will be located using RTK GPS though the proposed work area. The survey will adhere to all standards set forth in chapter 177FS and 5J-17 FAC. The final survey drawing will be certified by a registered Florida Professional Surveyor and Mapper and submitted to the FDEP Division of State Lands for approval to support an 11/1/2019 construction start date. adding Assistance& Notice to Proceed Once the construction plans and technical specifications are completed, APTIM will provide the FDEP all items necessary to request a Notice to Proceed (NTP) and provide the County with a bid package containing: construction plans, technical specifications, project permits, bid form, contractor questionnaire, and engineer's opinion of probable costs. The questionnaire will be integrated into the technical specifications. APTIM will assist the County in their lead of the bidding process.APTIM will participate in the Pre- Bid Meeting via phone conference, and assist the County in answering technical questions as needed during the bidding process. Once the bids have been opened, APTIM will assist the County in reviewing the bids and provide a recommendation to the County based on a review of the submitted bids. n1incar^.f RecOrr As the Engineer of Record, APTIM will conduct pre-, during- and post-construction tasks necessary for certification of the project. An APTIM engineer will attend the pre-construction conference and update the construction profiles using the Contractor's pre-placement surveys. During construction, APTIM will support the County's inspection efforts and perform weekly site visits to inspect the work and attend during construction meetings. It is assumed that there will be up to 8 weeks of active hauling during construction. APTIM will prepare a QA/QC check list, delineating the County, contractor, inspector and APTIM duties as a guideline for during construction coordination. Based largely on surveys, weight tickets, daily reports and observations made by the contractor and County inspectors, APTIM will prepare a post-construction certification to meet permit requirements. APTIM will also provide a construction and as-built summary based on the contractor's as-built drawings. It is assumed that the annual physical monitoring survey and Aptim Environmental& Infrastructure, LLC engineering report will be contracted by the County under separate work order.The third party's annual monitoring report will serve as the post-construction report and may include APTIM's as- built summary as an appendix. APTIM will review the contractor's pay applications, reconcile and/or review the pay volumes/tonnage based on mine records, weights tickets collected at the beach and physical surveys. Summary This work will be performed on a time and materials (T&M) basis with a cost not to exceed $98,717.10 as outlined in the attached fee spreadsheet. The work will be completed to support an anticipated construction start date of 11/1/2019. The overall time of the contract to complete surveys, certifications and Engineer of Record signoff will be within 360 days of receipt of the Notice to Proceed. Assurri • The recently completed hardbottom edge survey near Clam Pass Park is sufficient for the sand placement in the newly permitted Clam Pass Park extended project area. • Dune restoration above 5 ft. NAVD and dune vegetation are not part of this work assignment. • County inspectors will collect weight tickets,observe delivered sand quality and beach construction, and reconcile sand mine records with weight tickets collected at the beach. • The County or a third party will perform and prepare reports on the following tasks: o 2019 Physical Monitoring o Turbidity Monitoring o Biological Monitoring and Hardbottom Edge Surveys o Submerged Aquatic Vegetation Surveys • Marine Turtle Monitoring and Related FWC Coordination o Shorebird Monitoring Aptim Environmental &Infrastructure, LLC