Agenda 07/02/2014 PELICAN BAY SERVICES DIVISION
MUNICIPAL SERVICE TAXING & BENEFIT UNIT
NOTICE OF PUBLIC MEETING JULY 2, 2014
THE PELICAN BAY SERVICES DIVISION BOARD WILL MEET IN
REGULAR SESSION WEDNESDAY, JULY 2 AT 1:00 PM AT THE
COMMUNITY CENTER AT PELICAN BAY, 8960 HAMMOCK OAK
DRIVE, NAPLES.
AGENDA
1. Pledge of Allegiance
2. Roll call
3. Agenda approval
4. Audience comments
5. *Approval of Clam Bay NRPA Management Plan
6. *Recommendation of candidate for vacant director position
7. Administrator's Report
a. Operations Manager recruiting
b. Water Management responsibility at The Commons
c. County approval of PBSD Budget
d. Administrative help in drafting minutes
e. Monthly financial report
8. Chairman's Report
9. Committee Reports
a. Landscape &Water Management
b. Clam Bay, including report of copper measurements
c. Safety
10. Old business
11. New business
12. Adjourn
*Asterisk indicates possible Board action item
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 OR VISIT
PELICAN BAYSERVICESDIVISION.NET.
6/25/2014
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 62
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 33
RECREATIONAL USE 33
4.0 Management Plan Goal and Supporting Objectives 35
OBJECTIVE 1-MAINTAIN AND PROTECT THE NATIVE FLORAL AND FAUNAL COMMUNITIES WITHIN THE CLAM BAY NRPA 36
OBJECTIVE 2—ENSURE THE ESTUARY HAS ADEQUATE TIDAL AND FRESHWATER FLOWS TO MAINTAIN ECOLOGICAL HEALTH WITHIN THE CLAM BAY
NRPA 37
OBJECTIVE 3-MONITOR AND MAINTAIN WATER QUALITY WITHIN THE CLAM BAY NRPA 37
OBJECTIVE 4-MONITOR ARCHAEOLOGICAL SITES WITHIN THE CLAM BAY N RPA 38
OBJECTIVE 5—ENSURE RECREATIONAL ACTIVITIES ARE ENVIRONMENTALLY COMPATIBLE WITHIN THE CLAM BAY NRPA 38
5.0 Clam Pass Dredging 39
A. DREDGING POLICY 39
B. DREDGING CRITERIA 39
1. BAY TIDE RANGE 39
2. CROSS SECTION OF FLOW AREA AND VOLUME OF SHOALED MATERIAL 40
3. INLET CHANNEL LENGTH 41
4. EBB SHOAL 41
C. DREDGING CONSTRUCTION 42
1. TYPICAL CROSS-SECTIONS FOR DREDGING 42
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
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July 2, 2014
Ver. 6.2
6.0 Authorized Construction Activities 46
LIST OF PERMITS FOR WORK UNDERTAKEN TO DATE AND RELEVANT LEGAL FRAMEWORK 46
7.0 Clam Bay NRPA Management Plan Amendments 47
Clam Bay NRPA Management Plan Stakeholders Groups and Review Agencies 48
Clam Bay NRPA Management Plan Bibliography 50
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—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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 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 Clam Pass will be conducted to track the stability of the inlet. The Management
Plan outlines the following parameters that will be investigated and used by the consulting engineers
CLAMBAYNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
and the PBSD Board to make a recommendation of when and where dredging might be undertaken to
maintain the tidal exchange necessary for the long-term health of the estuary.
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
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 also be used to support permit applications that may be required for
management activities in support of the Goal and Objectives. It provides the information needed for
assurances to the permit review agencies regarding what resources are present (or may be present) in
the system, why management actions are being undertaken, and how minimization of impacts to the
natural resources in the system will be achieved. The document also allows for changes to the plan
should new information or management techniques come to light that would benefit the Clam Bay
NRPA.
ii
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
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July 2, 2014
Ver. 6.2
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—Ebb and Flood Shoals—Page 29
- Figure 16—Approximate locations of Drainage Basins within the Pelican Bay Development—Page 28
- Figure 17—Water Quality monitoring locations within the NRPA Boundary—Page 31
- Figure 18—Sections A,B,and C of Clam Pass—page 40
- Figure 19—Typical maintenance dredging cross-section—Inlet Channel—Section A—Page 43
- Figure 20—Typical maintenance dredging cross-section—Seaward Flood Shoal—Section B—Page 44
- Figure 21 —Typical maintenance dredging cross-section—Bayside Flood Shoal—Section C—Page 45
111
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Ver. 6.2
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
FDER Florida Department of Environmental Regulations
FLEPPC Florida Exotic Pest Plan Council
FLUCFCS Florida Land Use, Cover, and Forms Classification System
FSU Florida State University
FWC Florida Fish and Wildlife Conservation Commission
FWS Fish and Wildlife Service
LIDAR Light Detecting and Ranging
MAG Mangrove Action Group
MGD Millions of Gallons/Day
MSTBU Municipal Services Taxing Benefit Unit
NMFS National Marine Fisheries Service
NOAA National Oceanic and Atmospheric Administration
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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
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July 2, 2014
Ver. 6.2
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 and relevant
regulatory agencies, this Management Plan, or future amended plans, 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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
• 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 as appropriate.
4
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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.
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 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). See the NRPA timeline 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
Clam Bay system, but it is restricted by sediment deposits just inside the Pass and in the long
meandering tidal creeks surrounded by mangrove forests.
5
CLAM BAY
MANAGEMENT
Pelican Bay ServicesPLAN Divisio
July 2(DRAFT), 2014n
Ver. 6.2
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Figure 1:Approximate extent of Clam Bay NRPA boundary.
Clam Bay NRPA Vital Statistics
Total acres: Approx. 570 acres
Beaches: Approx. 5,000 feet
Beach Park:Approx. 35 acres
Mangrove: Approx. 420 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
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
Adjacent Communities
The Clam Bay system 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 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)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 %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 so early,there was no community-wide stormwater system. More recent improvements to the
road and utility systems have allowed for some dry retention and sewerage improvements to be put in
place. 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 was limited due to the shallow nature of the bay
and ephemeral conditions. Vessels are generally shallow drafted, and their access is limited by the day
to day conditions of the Pass and connecting waterway.
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CLAMBAYNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 mounds have been identified and indicate that this area
was used for settlement by these civilizations. The Indian shell mounds have been listed on the Florida
Master Site Inventory.
Historically, Clam Pass was a small part of a large system of relatively shallow waterways and
interconnecting wetland communities extending from Lee County to Doctor's Pass. Anecdotal
evidence suggests that canoes and shallow drafted skiffs were used within many of these
interconnected areas.
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 at least six times in the
last 25 years,most recently in 2013.
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CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
h
s
A $
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CLAM
PASS
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CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
•
r
1�` e1
CLAM �.
tr-
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, as discussed in more detail
later in this Management Plan.
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 BioIndustries 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).
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CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 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
CLAM BAY NRPA MANA GEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
3.0 Physical and Natural Resource Description and Assessment
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, all discussed further in this section. There are many additional factors that come
together to create the habitats and support the resources that make up the Clam Bay NRPA. These
additional factors are discussed further in Appendix 4.
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. For
information regarding soils specific to the Clam Bay NRPA, see Appendix 4.
` E
14.1•7441-'
+ n
ani
rmoG� r
``, 4:t ` ••••••• bb "I ;-
4c ,
;4 AV i c
35 +,
lJ t
111111L
35 �'
7
Figure 3:Soils map of the Clam Bay NRPA
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(see Appendix 4 for more information). 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(see Appendix 4 for more information). The Florida Department of Transportation's
12
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2,2014
Ver. 6.2
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.
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 are also addressed in Appendix 4. These
components include offshore hardbottom, oyster, and other benthic faunal communities that are not
specifically addressed in the FLUCFCS classification system. Additional historical information on the
natural communities within Clam Bay,the mangrove, and seagrass habitats is also included as
appendices to the Management Plan.
FLUCFCS Code 181- Swimming Beach
rtiowr
Y Ky + ` w441!• t t, •`tt.op'"4 r E Iv
NW,
t1 .� '�♦tia'.'•11 •., ,X "'. ••r..'V',- 1$t38. .',"• :.J "rI- r.,t-l1yt,,* . :t ' I �, i r,' 44k1; } b*l y X •..7
tiL
ti
.. - .e < •'
Figure 4:Beach habitat within the NRPA Boundary
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CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
There is approximately 8,675 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
coast. Shorebirds feed on marine invertebrates, such as coquina clams and mole crabs, at the water's
edge, and beaches are 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, are mostly
unaffected by the status of 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
54 ! 1,4 i 'l+�m—, s 4 %."1.71 '; a r: �'f 1
(' • $lV f t�C� F ;.,a<y, �'+'ar-`�W�T `,p �t{y {`},� i
4'�,.�`t {'�y � � jii
� .ti< 1 i' � . # �..,"C:rs� i� t h S. t. �'4,,y� `e" �'� j t;
rY:.;e. 4 � e.. 2 '1-411.i44:-..- -41.*
.IT s 'OE t. �s.A r 4 3
-, .,tet. - �7 .' .. r. "4 r wt fb t.
�, +t � 1 �}tea - �. �,� > �t �': � a '"��
z' .I err % t r e'''‘,, � f".s �4 u +,~it4'i of
�- >l+__ 1‘44:%714;,. .4 c� 'h �.. K � :.i. ji i"
a .�
{ `r
r 1 ' x', 241 (IIS
ilo
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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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
Wfi'r.:kk.'ill
�r fx:�.. , 's.7� .. `,,,--- .d0'- +iw�S. l,. '''''''r? •tom s ''',,,," •I'.robli"--11{�Y° �44 l' a1 r 1 s1-' �r6 II_ '•e r §
• r
),
1e,';• ,/...4-'''' am tit-CQ S'Xy � %� "c , t t
tz A#,, ' y - ,t»kY{ „fit + + 4h s' v
, st, t ' ,.....".1,4„, IA ', ,r i , . t 1
r
u
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 Bay (with and without connection to
the Gulf) ry p}�•.. ��
ts-
:a t7t� .t •::,' *4•41,01 er• '',- +r,•xy,o 1,' ' ' ''T -''',' I .af° }F '," '� �Y',1,
1>',, 4 i ' 4,2, c � r 41 Z 1 `1 i' t'j 4. V �l5"a,' ja rr F y 4""—" CtY,'
r �� - �.- ,"" „nit".'�, sc�t�1.`q ��3 �aQ'§+f .� i ;111.1'I.. 1 1:11, e.
1 1
' Vii.
540
Figure 7: Open Water habitat within the NRPA Boundary
15
i
CLAMBAYNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 Swamps (Forest)
V i st rd , x A1. ''' ''—..4"--
f �'" ^ f '''''1"
✓'1 .. /...i- ',4:"I''',5-;
4
„„N. ..„,, . ..:.,4 ak t,,,,,,, 4.; ,
�� , X+ 4yQ1�° X fir 4 '' ,:+....Z ". 4 1 1 A x /..;74(' `L
( -c4 012 '" $"--‘'..4°'i e.,',47-'s�. ,iik �'- t-- !L"a -? ,e
. :r
C �'f
T
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 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
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 will 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. This forest
community was the habitat affected by the mangrove die-off. The hand dug flushing channels were
constructed throughout this community to increase the flushing capacity through tidal inundation.
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 included with this plan.
Management concerns within the mangrove habitat include ensuring adequate tidal flushing and
protection from exotic vegetation or pest infestations.
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CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
FLUCFCS Code 642—Salt Marsh
'HeMAr
71-15,4
' ~ es' , hI �i.5 Fa 'i '' ? - f :- 1 ,'� ' az
17.. .4r--(‘ ��1� . 6 a � _ i;', � ii; ,--1":7S6.:, f ?r3c � i, � 1 at ,-4,41 ,e-,-.L.;
jficil h.44iii ' � {
, y
,.. /f r:, fi, "/,t, ,, ff `S' .1
$ \ ___ 642 / -,£^ § ..,
+(P' °'
n a,.104.4.-e':C. .. ,- YdMil — ; ,.' '' 7. ' .: ,,`i
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 would be protection from exotic vegetation infestation as well as
ensuring appropriate water and salinity levels.
FLUCFCS Code 651 —Tidal Flats
r • vl »r stir ��q+r ,� j� • l+• .�` tY ♦ kyr :..'� L '4.:4: L' vr�
('��S,`F!.% F�`ti." ail tti ' a ,,,,„---,-.:N.,.....7„....:—
,„-- , „...:— �° { .STM ,, .a�* 4 �y,, ti t
E;S:•���S ''ip �C ;ij..ryr,..- '�C.'�t� } 4,4V1';,'
ft • Y; .�..^• 3'r•. .. y.. �� .:� o� ..' 4�"( 1;r 14 r `aI,jT,ji i
.......„,....—i.
„,.. Vii_ •'S'1 n
651 ___._'` .
Figure 10: Tidal Flat habitat within the NRPA Boundary
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
18
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 the dredging,the
resultant currents that could be expected as a result of dredging, and the frequency of disturbance.
FLUCFCS Code 911 —Seagrass Beds
t ,,-- f,°: r r {T T '-..'-A-7- .:.
w . ry{�'�S. 7" I. —7 y '7 r'' 1jplGii}} Y .:4; x'''''''t. r 7 "-!R ,rp �.C.4ww a+ . a +. '4p , ,, , i. f`'`�'y ', Q. r' •
x , , . _.
�' '�'.. ftp ap'' t' �ty. 0 ,1[ 1
IN ti '..4::y• x -b, , "?.r78�
iiiiiiiiiimikaiiii+k
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 (see attached Exhibts). Three species are commonly found in these
Clam Bay waters: the largest turtle grass (Thalassia testudinum)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 much more
ephemeral in nature, and diligence is required to be able to locate it during the time frames when it is
present.
Seagrass coverage in Clam Bay has varied over time but has always been found predominately 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 about 5.13 acres. Annual monitoring of seagrass beds along the monitoring
transects has estimated coverage from a low of approximately 1.2 acres in 2003 to the current estimate
of 2.85 acres from the 2013 survey. It should be noted that the coverage estimates are taken from
19
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 the Appendix 3 attached to this
report.
Other Benthic Habitats
Oyster Bars
F hs 1r",y
iF`A. t �'�.,1 7.�..1y'1 � E►T'�ewf i13:s— +t irftr
k`)Ti,' tj ^ t4� ° ' '•r
yP = F
E -
• .ki •
f44� 1: t"vtF�h t`' x . '
,,11711:4,
•jot ;,
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 closures
of Clam Pass are thought to have resulted in the disappearance of oyster bars in the system, though
some re-occurrence 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 recreation users,water quality, and flushing.
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CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2,2014
Ver. 6.2
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, flushing and dredging.
Q S ry
p „ .+lit. • �/*r'� •.Y .....
3 AP v Q g t b t is _* 1-„fi t i 1, ;14,1t .+.:;
4 m n ; t- , ,'t i';' ;',..:;:,a6.,..',,i k- '„-- •s. �..7:17.1.1} .y, +� t tr $�':},�"'y. e.'
442 .a ;s
, "-,46
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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.
21
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2,2014
Ver. 6.2
Hardbottom Communities
N.iXr'-b .!t 4. " .,i 4} .�*. .:n M ,., !moi '�.s..- �q1`��
�i 1
ra y.d ,. E F ,,.,, OUTER
r ,
;.'4..- INNER • I CLAM BAY d
CLAM BAY t..R,
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4' CLAM BAY
CLAM -
,,,-,. "4"1*.''' ''''" r ,--4PASS j,:"
Nl
O
AI All*
may" t . .- ;•,- J j
GULF OF
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Figure 14:Hardbottom Community off-shore of the NRPA boundary
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 information received from the County shows that the landward
edge of this habitat is located approximately 250 to 300 feet offshore from the Pass.
Management concerns related to this habitat include recreation use and potential turbidity impacts
resulting from dredging or other management activities within 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)
- Melaleuca(Melaleuca quinquenervia)
22
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
- 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)
A juvenile smalltooth sawfish was observed by Turrell, Hall & Associates, Inc. biologists in 2008 in
the connector creek between Inner and Outer Clam Bays. 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 the mangrove habitat is appropriate, and they could be present in the upper reaches of the
mangrove forest. 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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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
A list of plant and animal species that has 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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 (through tidal exchange)removes
metabolic waste products (e.g. carbon dioxide and toxic sulfides) and excess salt. The vertical
component refers to incoming water that percolates down into the sediment and root zone, and the
sediment drainage, on a falling tide which removes metabolic wastes and excess salt.
It is the inflow and outflow of sea water that is critical to the ability of the estuary to manage these two
ecological functions and as such dissipate salts, organic matter and freshwater. It follows that anything
that affects the system and alters the ability of the system to perform these functions, will, in most
instances, cause 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 between the
middle boardwalk and 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.
25
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
In fact, during portions of the Tackney study no tidal fluctuation was noted in the Upper Clam Bay and
only 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).
Hydrologic studies have indicated that during a tidal cycle, 75-80% of water that flows through the
Seagate culverts originates in Clam Bay,while 20-25%of water that flows through the Seagate
culverts comes from Venetian Bay (PBSJ 2009). Enlarging the Seagate culverts is not recommended
because it would further reduce the tidal prism of the Bay, and decrease the stability of Clam Pass
(FDER 1981; Tackney 1996).
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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 stormwater
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. 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. Irrigation water for 27
holes of golf and landscaping in Pelican Bay is approximately 3.0 MGD which approximates 26 inches
per year of additional rainfall equivalent(Wilson, Miller et. al., 1996). When added to the average
rainfall for South Florida of approximately 53 inches per year,the local area has 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, including irrigation, reaches the
ground and either seeps into the ground or runs off to a stormwater detention area within each system.
The stormwater 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 stormwater is detained for flood protection
and pollutant control. Stormwater discharge is controlled by a series of weirs designed such that the
post-development stormwater run-off rate does not exceed pre-development rates. Stated differently,
the system is designed to discharge stormwater in the development portion of Pelican Bay in the same
manner that it discharged stormwater prior to development. The stormwater discharge is gravity
driven and exits the weir system for a final release into Clam Bay.
Stormwater runoff from an additional 130 acres of watersheds, outside of Pelican Bay, contributes a
supplementary and significant volume of discharge to Clam Bay. This water represents 7.9%of the
total stormwater discharge to Clam Bay.
27
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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Figure 16.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. 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, in the northern section, sheet
flow was not being efficiently removed at the time of the mid-1990 mangrove die-off due to lack of
flow through the forest. Thus, it accumulated, increasing soil saturation and raising the mean water
table elevation, and apparently overwhelming the black mangrove's anaerobic soil/gas exchange
mechanisms. Mangroves in these areas became stressed and died. The construction of hand-dug
flushing channels in the mangrove forest,undertaken as part of the 1998 Management Plan addressed
this problem and resulted in the reestablishment of mangroves throughout the die-off area.
Inlet Dynamics
Clam Pass is a small wave-dominated inlet on the southwest coast of Florida that provides a tidal
connection to approximately 500 acres of wetland preserve in the of 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 when littoral transport rates are high due to periods of high wave
energy.
28
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 sand bar features
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.
M
J.
,,
IMS
Mku
Figure 15: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 to required
flow area 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.
29
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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. 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. 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.
Chapter 4.0 of this Management Plan outline the scope of the monitoring efforts and factors that will
be considered prior to a determination to dredge Clam Pass.
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 is performed at several sample points within Pelican Bay and Clam Bay. The
sample point locations are shown on the Figure 17 on page 31. There are currently nine sampling
locations within Pelican Bay and Clam Bay. 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 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 stormwater treatment portion of the property(Class III waters)within Pelican
Bay.
30
CLAM BAY NRPA MANAGEMENT )
Pelican Bay ServicesPLAN(DRAFTDivision
July 2,2014
Ver. 6.2
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Figure 17: Water Q'IIuality monitoring locations within the NRPA Boundary
31
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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
• Phosporus - Total
• Residues—Filterable (Total Dissolved Solids (TDS))
• Silica(SiO2)
Water quality sampling results of nutrient loading seem to indicate that the development stormwater
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 Phosphorous) levels have
been observed from the testing locations along the berm. It is believed that the spikes observed are
correlated with fertilizer application within the community.
The FDEP conducted water quality sampling within the Clam Bay NRPA in 2011 and 2012. Based on
their sample results,FDEP had made an initial determination that Clam Bay could be impaired for both
Dissolved Oxygen (DO) and Copper. As a result of coordination between FDEP, PBSD,the 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.
TMDL (Total Maximum Daily Load) are defined by the FDEP as the maximum amount of a given
pollutant that a surface water can absorb and still meet water quality standards. FDEP did determine
that the Clam Bay System was impaired for copper and was placing the Clam Bay system on the
Everglades West Coast verified list for copper with medium TMDL priority (5 to 10 years for TMDL
development). Subsequent copper testing undertaken by PBSD has also shown periodic elevated
levels of copper within the Clam Bay Class II waters.
The PBSD is developing an upland stormwater and nutrient management program that is designed to
reduce nutrient and copper inputs into the stormwater system. Once completed, this program can be
given to FDEP for review and if satisfied with the anticipated reduction of copper resulting from the
implementation of the plan, the system could be removed from the impaired list. While the upland
32
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
nutrient management plan is not part of this Management Plan, PBSD will work closely with the
Pelican Bay Foundation to coordinate and share information and to integrate management decisions
and activities into this Management Plan where appropriate.
Archaeological Resources
The Florida Division of Historical Resources Master Site File lists three known archaeological sites
within the Clam Bay NRPA boundary. All three are located within the mangrove forest habitat. Two
of the sites (CR476 and CR547) are located north of the Pass and south of Inner Clam Bay. The third
site (CR576) is located south of the Pass and north of the Clam Pass Park boardwalk.
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.
All three of the sites are within the mangrove forest and outside of the footprint of any previous or
future anticipated dredging activities.
Recreational Use
The Clam Bay NRPA provides a variety of opportunities for recreation, such as walking, kayaking,
canoeing, paddle-boarding, swimming, fishing, and snorkeling. 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 unique flora, fauna and water
quality of the Clam Bay NRPA.
Clam Bay's dense forest of mangroves significantly 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.
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
33
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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.
Occasionally, motorized vessels, including boats,jet-skis or other personal watercraft, have been
observed operating in a manner that may be in violation of Florida Statutes. Appropriate County
Ordinances regarding vessel operation may be sought in the future to ensure that Clam Bay remains a
safe environment for all recreational users.
34
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 will be
completed documenting the results and analysis of all monitoring activities over the course of the
previous year.
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.
GOAL
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.
35
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
Objective 1 —Maintain and protect the native floral and faunal communities within the Clam Bay
NRPA
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.
• Update a list of observed wildlife periodically.
• Monitor benthic organisms periodically.
B. Protect Listed Species.
• Monitor gopher tortoise burrows periodically.
• Report Collier County's sea turtle nesting findings as they become available.
• Update the species list in the NRPA as new species are sighted.
• Conduct appropriate wildlife surveys in association with disturbance events.
• Update educational information on species, such as the Clam Bay Guide, as needed.
C. Remove Exotic and Nuisance Flora and Fauna.
• Locate and identify exotic, nonnative, and nuisance species.
• Remove, or report to the responsible entity for removal, Category I and II invasive
exotic species and nuisance species as needed.
36
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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.
• Seek appropriate federal and state permits to dredge Clam Pass or interconnecting
waterways if needed.
• Monitor identified variables of Clam Pass conditions to determine when dredging is
needed. (See Chapter 5.0 and Appendix 5 for information on variables.)
B. Ensure appropriate freshwater inputs and drainage.
• Conduct periodic monitoring of hand-dug channels.
• Perform periodic maintenance of selected sections of hand-dug channels.
• 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.
• Continue a program of water quality data collection, making certain that all protocols
and sampling locations comply with FDEP guidelines and standards and addresses the
Site Specific Criteria approved by FDEP.
• Review and report water quality data, including comparison to historical data and in
conjunction with biological data.
• Develop intervention strategies when standards are not met.
• Enter data into STORET system on an annual basis.
• Develop a plan to address copper impairment in Clam Bay.
B. Support programs for controlling water pollution from point and nonpoint sources.
• Support Best Management Practices for fertilizer and irrigation use in Pelican Bay.
• Support programs to reduce algae levels in upland stormwater ponds in Pelican Bay.
• Support programs to reduce additional copper input into stormwater ponds in Pelican
Bay.
37
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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.
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 responsible entity.
B. Maintain existing canoe trail.
• Inspect signage periodically.
• Repair or replace signage as needed.
• Repair or replace seagrass and caution shoaling signs.
• 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.
E. Maintain materials to educate visitors about the unique features of the Clam Bay NRPA.
• Inspect signage periodically.
• Report signage needing repair or replacement to the responsible entity.
38
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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
competent 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 and bathymetric monitoring data.
In both cases the PBSD Board would, after consultation with and advice from its consulting coastal
engirneer, 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. 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, data on the four variables listed below will be regularly
collected. They will be reviewed by the consulting engineers. If data are not within the identified
target ranges for the variables, further monitoring and/or intervention will be considered. 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.
39
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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
77/
.. �. ,. ear em.
Figure 18: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
40
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
approximately 50 feet apart. The average and minimum cross-section areas were used as indicators of
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:
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 areas:
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
41
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
by significant change in ebb shoal offshore distance, volume, and increase in dry beach areas adjacent
to the inlet.
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.
A summary of criteria for dredging is presented in the table below.
Dredging Criteria Parameter Summary
Location Target Description
>0.6 ratio comparison of the interior and Gulf
Bay Tide Range Ratio 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
C 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
>250 feet distance from shore to the outer ebb
Ebb Shoal
shoal limits
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
permitting. Typical cross-sections are shown for open areas in Sections B and C where the waterway
is wider than the target cross-section. In areas where the waterway is limited by mangroves,the width
of the cut will be limited to maintain a minimum of a five-foot buffer to the mangroves. In Sections B
and C where seagrasses may be present every effort will be made to avoid dredging activities that
would be harmful to seagrasses.
42
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
2013 Target Proposed "
Dredged Area Design
Area area ''}
Below 312 300 300
MHW _�
e 6,
SECTION A - TYPICAL
6- ssn+oi+'ti=
- MONO VAMES
1
< Si
2 -�-�
`-' -MHW {4-0.33')
a
-2- I STOESLOPE,V:TH .
i—4— _ocsroi cur(-me KM)
-6- -20t3 TEMPLATE(-OJ MAYO)
W -
-8- yp• _._
-10 NORTH `` SOUTH
-12200 -150 ' -100 ' -S0 ' 0 40 100 150 200
DISTANCE FROM CENTER (FEET)
Figure 19: Typical maintenance dredging cross-section—Inlet Channel—Section A (figure provided by Humiston&
Moore)
43
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
2013 Target Proposed
Dredged Area Design
Area area
Below 650 450 450
MHW
SECTION 6 - TYPICAL
6-
2-
•-•
-2-
-MNw(+0.33')
-2- 11
\-1\
MUNE 1Y:IN
z
o
—=cm out(-LE 14Any
-4-
. _ - mu mount(-s.e'mvo,
-6- too'
W -
-6-
-10 NORTH SOUTH
-12-200 -1150 -1100 -50 0 50 100 150 200
DISTANCE FROM CENTER (FEET)
Figure 20:Typical maintenance dredging cross-section—Seaward Flood Shoal—Section B(figure provided by Humiston&
Moore)
44
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
2013 Target Proposed
Dredged Area Design
Area area
Below 530 450 450 Atk,
MHW
ay
8
SECTION C - TYPICAL
n 4-
> -
2
0-7
- { SSM[IYalM
_2- s
7
p _M'MII WI(-&r Y4
-6- tcp'
W
-8-
-10- SOUTH
NORTH
12200 -iso _1OO ` -;0 II 510 I10 150 200
DISTANCE TROY CENTER (FEET)
Figure 21: Typical maintenance dredging cross-section—Bayside Flood Shoal—Section C(figure provided by Humiston&
Moore)
45
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 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.
46
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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 its consultants. 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. Those changes in Management
activities or new work items that are outside of the scope of the Management Plan but are considered
important or practicable by the Pelican Bay Services Division and its consultants will be submitted to
FDEP and USACE for consideration and inclusion into this Management Plan.
47
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
Clam Bay NRPA Management Plan Stakeholders 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 1450 Merrihue Dr
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
48
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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
49
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
Clam Bay NRPA Management Plan Bibliography
1. 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.
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.
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 BioIndustries, 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.
50
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
14. Humiston and Moore Engineers. 2010. Clam Pass Restoration and Management Plan
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 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 Bay
Property Owners Association (PBPOA), Pelican Bay Foundation, Inc. (PBF), and the
Mangrove Action Group (MAG), and the Conservancy of Southwest Florida(CSWF). Dec
2010.
51
CLAM BA YNRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
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
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
Timeline of Important 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.
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i
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rte, --
i1. v
.. .tt'el-.i
Outer Clam Bay
,,9
, ,
Upper Clam Bay
4
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•
Venetian Bay
_ dir
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.
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1976
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.
1977-1979
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 Biolndustries 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 to 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 BioIndustries produces biological reports:
• Fish populations of tidal ponds west of Clam Bay
• Populations of Melampus coffeus (Coffee bean snail) and Cerithidea scalariformis
(Ladder hornsnail)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.
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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(See NRPA boundary map on page 6
of this report).
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.
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1998
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(managed by the PBSD)in the spring by
Ludlum Construction Company. Hydraulic dredging of Cuts 1,2,3,and 4(see attached Exhibits) are
carried out. A 30 foot entrance cut is dredged.
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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(see attached Exhibits). 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.
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2005
Hurricane Wilma comes ashore about 30 miles south of Clam Pass. More limb and leaf loss is noted.
The Pass does not close.
`4 4f". ;I.77.:::rt• raj ,. 5 y. 7 '
7.''= rc ""' °' 4 "
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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 (see attached Exhibits). 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.
2008
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.
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Impacts from tropical storms Debby and Isaac, along with numerous winter storm fronts, cause the
closure of the Pass.
2013
A single event mechanical dredge permit is acquired from the FDEP and USACE. The entrance cut is 45
feet and 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.
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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
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 discernible 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.
Permit Details
South Florida Water Management District Surface Water Permit No.: 11-00065-S
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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 Clam 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 Clam Bay.
Department of the Army Corps of Engineers Permit No.: 86IPT-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.
Department of Environmental Regulation Modification Permit.: 11-50-3769
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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: 1.) 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.
Department of Environmental Protection Permit Modification for Permit No.: 0128463-001-JC
Date of Issue: May 19, 1999
Expiration Date: May 28, 1999
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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)
Department of Environmental Protection Permit No.: 11-0295193-004
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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(Dermochelys 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.
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CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
APPENDIX 2 - A RECENT
HISTORY OF MANGROVE
MANAGEMENT IN CLAM BAY
A2
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 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 Biolndustries and Gee and Jenson, 1978).
Dead and stressed mangroves were again reported for Clam Bay 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
reported 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 time
the die-off area was approximately 6 acres. A widespread mortality of mangroves in
Florida Bay was also reported in the summer of 1991 (Yarboro et al. 1994), and it
was attributed, in part, to natural drought conditions and unusual tidal inundation
patterns.
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 - 1
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 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.
1999
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
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The main die-off area(NW Clam Bay, adjacent to The Strand) 1999
A2 - 3
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.
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Main die-off area 2000
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Riley encasements and flushing cut
A2 - 4
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.
Main die-off area 2001
A2 - 5
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. Batis 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.
Main die-off area 2002 with notable re-growth
A2 -6
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.
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Main die-off area 2003
A2 - 7
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.
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Main die-off area 2004
A2 - 8
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.
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Main die-off area 2005
A2 - 9
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.
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Main die-off area 2006
A2 - 10
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.
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Main die-off area 2007
A2 - 11
2008
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.
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East of the Strand Die-off area, 2008
A2 - 12
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.
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Main die-off area 2010
A2 - 13
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.
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A2 - 14
2013
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.
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Main die-off area 2013
A2 - 15
CLAM BAY NR PA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
APPENDIX 3 - RECENT HISTORY
OF SEAGRASS PRESENCE IN
CLAM BAY
A3
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 report
exhibits show the plot location 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. 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 80%
decline in seagrass coverage during those two years but instead the 1994 report may have
over-estimated the coverage.
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 of them. 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.
Annual Estimates of Seagrass Coverage since implementation of CBRMP
A3 - 1
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.
SEAGRASSES APPROX.10.04 AC.
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Approximation of 1994 Seagrass Coverage
A3 - 2
1999
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.
.SEAGRASSESAPPROX:5.i3
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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
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.
2006
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.
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2006 Seagrass Coverage
A3 -4
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.
2008
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
Several mollusk species, including Florida horse conchs, southern hard clams, stiff pen
shells, tulip snails, cockles, oysters, and several others were all observed.
2012
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.
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SEAGRASSES APPROX.4.27
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2012 Seagrass Coverage
A3 - 6
2013
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.
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2013 Seagrass Coverage
A3 - 7
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
APPENDIX 4 - PHYSICAL AND
NATURAL RESOURCES
A4
Appendix 4 — Physical and Natural Resources
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.
It is important to understand that where the soil survey shows mapping units named for soil
series,the units represent the dominant undisturbed soils in that 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.
Durbin and Wulfert mucks,frequently flooded(Map Unit #40), covers approximately 66% of the
NRPA. These level, very poorly drained soils are most often found in association with tidal
mangrove swamps. Mapped areas can consist entirely of either Durbin or Wulfert or any
combination of the two soils. Individual areas are elongated and irregular in shape and range
from 50 to 1000 acres. The slope is 0 to 1 percent. The permeability of the Durbin soil is rapid,
and the available water capacity is high. The permeability of the Wulfert soil is rapid, and the
available water capacity is moderate. The water table fluctuates with the tide and is within 12
inches of the surface most of the year. The soil is subject to tidal flooding. The natural
vegetation within these areas consists of red,white and black mangroves.
Canaveral-Beaches Complex (Map Unit#42) covers approximately 9 %of the NRPA.
This map unit consists of the nearly level, moderately well drained Canaveral soil on low ridges
and beaches. Individual areas are elongated and irregular in shape and range from 20 to 300
acres. The slope is 0 to 2 percent. Typically, beaches consist of sand mixed with shell fragments
and shells and are subject to frequent wave action. The permeability of the Canaveral soil is
rapid to very rapid. The available water capacity is very low. In most years,the seasonal high
water table is at a depth of between 18 to 40 inches for 1 to 4 months. This soil is subject to tidal
flooding under severe weather conditions. Natural vegetation consists of sea oats, seagrape,
cabbage palm, and salt grasses. They are commonly invaded by exotics such as Australian pine
and Brazilian pepper.
Topography
Topography 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 Exhibits).
A4 - 1
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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
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 precipitation.
1981-2010 Temperature and Precipitation Normals Graph
110.0
100.0
90.0 • •■+■•vf,mx • •���
8.8 �.t#'r err""` 11.1.4.1.11 OW 1�'r",,,.■�_'�'"44.4%.....11614"
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30.0
20.0
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"woo
I0.0
Jan Mar Mar Jul Sep Nov
0 Precip (in) 0 Min Trnp (SF) 0 Aug Tmp(`F) 0 Max Imp (`F)
Temperature
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
June, July,August, and September.
A4 - 3
1981-2010 Temperature and Precipitation Normals Graph
0 Precip(in) 0 Min Tmp(`F) 0 Avg Tmp(`F) 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
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.
Saffir-Simpeon Hurricane Scale Eventual dissipation or modification, averaging 7 to 8 days
category Wind speed Storm surge later,typically occurs over the colder waters of the North
mph rt Atlantic or when the storms move over land and away from
(km/h) (m)
the sustaining marine environment.
(2250) (>5.
131-155 13-1e. Due to the destructive nature of these storms, landfall can
Four (210-249) (4.0-5.5) result in significant damage to upland development and
111-130 9-12 facilities from storm surge,waves, and wind. A good example
Three
(178-209) (2.7-31) of this would be Hurricane Wilma which formed in 2005.
96-110 6-9
j Two (154_177) (1.8-2.4) A tropical storm is defined by maximum sustained winds from
74-95 4-5
One 35-64 knots (40-74 mph). A hurricane has maximum
(119-153) (1.2-1.5)
Additional classifications sustained winds that exceed 64 knots (74 mph). Hurricanes
111111111111.111 are classified into different categories according to the Saffir-
Simpson scale. Hurricanes can also spawn severe weather
such as tornadoes as they move inland.
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
Number of Named Storms Passing through or near Naples
Year #of Storms Names Strength closest to Naples
1992 1 Andrew Hurricane Cat. 3
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
Hurricane Wilma image
10/19/05 13455 0018.12 WV
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A4 - 6
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 1 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 (WWIII)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
WAVE ROSE WIND ROSE
"
WM NNE MS" n Mn
xrl s Ir
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LW VnW ESE
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4111 Figure Bi. Clam Pass,Wave&Wind Roses-2006
Wind and Wave Roses—2006-2013 (Provided by Humiston and Moore)
WAVE ROSE WIND ROSE
N I0m WIE
WM NNE a•
a.
OEEE ' ..••
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ay :, �ns• rut• �E•
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Figure 2.Clam Pass.Wave&Wind Roses—2006 to 2013
I
Wind and Wave Roses—2013 (Provided by Humiston and Moore)
A4 - 8
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,
hydrology, soils, 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. 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.
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
540 Bays (with and without direct Wetland 23.16
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 are also addressed below. These
components include offshore hardbottom, oyster, and other benthic faunal communities that are
not specifically addressed in the FLUCFCS classification system. Additional historical
information on the Clam Bay mangrove and seagrass habitats is included as appendices to the
Management Plan.
FLUCFCS Code 181- Swimming Beach
Beaches form when offshore sand deposits are moved landward by wave action usually during
the spring and summer. Sand,which is stirred up as the wave breaks on the shore, drops out of
suspension as the water moves up the beach face. Thus,the beach becomes gradually higher,
wider, and steeper. In the wintertime, larger,higher energy waves associated with winter storms
overflow the beach area and stir up the sand deposited earlier in the year. The sand is pulled off
the beach as the wave recedes and is deposited in an offshore sand bar. If these two forces are in
equilibrium,the beach area will be stable from year to year. However,naturally occurring
factors, such as storm events, littoral drift(lateral movement of sand because waves approach the
beach at an angle), and offshore winds, upset this equilibrium and result in the ever shifting
nature of the beach environment.
A4 - 9
Dunes form because of onshore wind action on beach and sand. When wind speeds are
sufficient, individual grains of sand start to roll and bounce along the surface. This windborne
sand is transported landward until the wind speed drops below that needed to move the sand.
Coastal vegetation is critical for slowing wind speeds and causing sand to be deposited.
Landward of the highest tides,pioneer or frontal zone sites are stabilized by sand trapping action
of various rhizomatous grasses and low growing shrubs that are tolerant of salt spray. Only a
few plant species can tolerate the stresses of a dune environment,particularly frontal dune sites.
Foredune plants must be able to survive being buried by blowing sand, sand blasting, salt spray,
and saltwater flooding, drought, heat, and low nutrient supply. Coastal plants colonizing the
dunes are key players in trapping windblown sand and preventing coastal erosion as the first
defense against heavy winds and surge of tropical storms.
Many plant species that occur on dune areas have developed specific attributes to help them
survive these harsh environments. These include high growth rates, dense root systems, low
profiles, and high flower and seed production rates. Species common on the beaches of the Clam
Bay system include: sea oats (Uniola paniculata), seagrape (Coccoloba uvifera), and railroad
vine(Ipomoea pes-caprae).
FLUCFCS Code 322—Coastal Scrub
Landward of the frontal (beach)zone area is the back dune zone(also often called the coastal
shrub or scrub zone), a portion of the dune that is more stable,has greater organic matter, and
supports less salt tolerant grasses and shrubs as well as some trees.
Many of the woody species found in coastal scrub are low growing and shrubby 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.
Coastal scrub is represented by a conglomeration of coastal species generally found in a narrow
band between the mangrove forest and the beach areas. 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). See page 29 for
a more complete list of plant species found in this habitat.
A4 - 10
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FLUCFCS Code 428—Cabbage Palm Hammock
This forested zone is composed of the more protected dune vegetation farthest from the Gulf of
Mexico. The Cabbage Palm Hammock habitat is identified by the preponderance of cabbage
palms (Sabal palmetto). It is generally found in pockets located between the mangrove forest
and the coastal scrub zone or beach areas. Aside from the cabbage palms, seagrapes (Coccoloba
uvifera), buttonwood(Conocarpus erectus), and several other hammock species, such as wax
myrtle (Myrica cerifera) and myrsine (Myrsine guianensis), are common. See page 29 for a
more complete list of common plant species found in this habitat. A hammock is a habitat that is
densely shaded by a canopy of trees. Hammocks usually have sparse groundcover that leaves the
forest floor mostly open for animals to travel through. Hammocks also provide a reprieve from
the sun for animals and humans alike. In Clam Bay,this habitat is also susceptible to infestation
by exotic vegetation, such as Australian pine (Casurina equisetifolia) and Brazilian pepper
(Schinus terebinthifolius)which are addressed later in this Section.
FLUCFCS Code 510 and 540—Interconnecting Creeks and Bay(with and without
connection to the Gulf)
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. Second in
extent of aerial coverage within the NRPA boundary, it is the bays and interconnections which
serve as the life blood of the estuary.
These open water habitat serves 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
A4 - 11
open waters of the bays and interconnecting creeks. As outlined below, several of these
communities are present within the Clam Bay NRPA and will be considered when deciding on
management activities outlined within this Management Plan.
Multiple studies have indicated that the single most important thing that can be done to restore
the health of the Clam Bay system is to improve the total tidal flushing capacity of the system
(Tackney 1996; Lewis 1997; Wilson Miller, et al 1996; Turrell 1995). The dredging conducted
within the Pass and the interconnecting creeks, as well as the hand-dug flushing cuts,have been
seen as the major contributing factors to the restoration of the mangrove forest community within
the system (Turrell 2008; Humiston &Moore 2003).
Tidal Pass
Clam Pass is the only open water connection to the Gulf of Mexico for the Clam Bay NRPA.
The exchange of seawater between Clam Bay 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. In the absence of surface water circulation or tidal activity,
estuarine habitats, such as mangroves, can slowly die due to deleterious changes in the sediment
because in the absence of oxygenated water the sediments become anaerobic or anoxic, and
metabolic wastes and hydrogen sulfide accumulate in the anoxic sediment(CBRMP, 1998).
Tides in the Gulf of Mexico are mixed,with the norm being two high tides and two low tides
experienced per day and normal amplitude (range) of approximately 2 feet. The highest tides
(springs) are experienced twice per lunar month at full and new moons when the gravitational
pull on the Earth's surface waters is greatest. Neap tides also occur twice per lunar month when
the planetary(gravitational) influences of earth, moon and sun are perpendicular.
A4 - 12
CLAM BAY TIDAL RANGES
2.50 DPRE-DREDGE RANGE
®POST-DREDGE RANGE
•10/99-01/2000 RANGE
003/00-05100 RANGE
M06100-07/00RANGE
■09/00-10/00 RANGE
2.00 4r ■.. `■ ■12/00-01/01 RANGE
002/01-05/01 RANGE
■07/01-08/01 RANGE
■09/01-11/01 RANGE
i001/02-03/02 RANGE
1 ■04/02-07/02 RANGE
j.50 1 ■07/02-09/02 RANGE
1 11111/02-02/03 RANGE
W i 005/03-06/03 RANGE
®09/03-11/03 RANGE
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% GULF REGISTRY SOUTH NORTH UPPER
It can be seen that the health of the mangrove forests is directly related to the efficiency of the
tidal pass. Clam Pass and its associated waterway is a very dynamic creek whose location has
varied over time (Turrell 1995; Tackney 1996). Because of this, it is susceptible to outside
events and can periodically close, such as has happened at least six times in the last 25 years.
Tidal creeks are passageways for fish and marine invertebrates between the open 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 by seagrasses
and other benthic plants, and the substrate is typically sand and shell with the finer sediments
carried in suspension and deposited just outside the mouth of the Pass (the ebb shoal delta) or to
the interior of the system on the incoming(flood)tide.
FLUCFCS Code 612—Mangrove Swamps (Forest)
Mangroves are salt tolerant trees that grow in tidal areas of the tropics and are legally protected
for their ecological value with such functions 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.
A4 - 13
• 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 gasses.
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 3 included with this plan.
Red Mangroves
Red mangroves (Rhizophora mangle) are recognized by their tangle of reddish looking prop
roots, long cigar shaped seedlings (propagules) and their large,pointed evergreen leaves. Red
mangroves flower all year but reach maximum propagule production during the late spring and
early summer months. They are typically the most seaward of the three species with the prop
roots and vertical drop roots providing support. Small pores on the trunks called lenticels allow
oxygen exchange via air as the waterlogged soils become rapidly oxygen depleted. Salt is
excluded from the plants cells through a process called ultra-filtration roots. The characteristic
propagules germinate on the parent tree and drop and float for up to a year, finally becoming
heavier at one end so that when encountering a suitable substrate they are ready to root upright.
The mass of prop and drop roots forms extensive surface area under water for attachment of
sessile, filter feeding marine species (such as sponges,tunicates, and mollusks) as well as hiding
places for juvenile fish. Birds,butterflies, insects, and mammals find home and food within the
canopy.
A4 - 14
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Red Mangroves and Propagules (inset)
Black Mangroves
Black mangroves (Avicennia germinans) are typically found a little further inland. Key
identification features include the snorkel like pneumatophores which radiate upwards out of the
soil from the base of the trunk, a grey-black rough bark and slightly pointed, oval leaves which
are silvery with salt deposits on the undersides. The pneumatophores play an important role in
oxygen exchange and unlike the red mangroves,which keeps salt out of the body cells through
filtration in the roots,the black mangrove excretes salt out of the backside of the leaves. They
are also reliant on adequate tidal exchange but lack the supporting prop roots that typify the red
mangrove. Small white flowers and lima bean shaped propagules are typically apparent during
the late spring and early summer months. Black mangroves are cryptoviviparous as the embryo
develops within the fruit while on the parent plant. When these propagules fall from the parent
tree,they are able to float for a short period before rooting in the mucky soil.
A4 - 15
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White Mangroves
White man groves(Laguncularia racemosa) are the third mangrove species and are often found
further inland than the other two species, Although zonations described are typical they can
frequently vary. Since they often occur in drier areas,white mangroves do not exhibit the
adaptations to soft, anaerobic soil of the other species. The bark is characteristically grooved and
furrowed, and leaves are oval,mid-green and leathery with two small glands on the petiole at the
base of each leaf. White mangroves also flower in the spring and early summer, and the small
seedlings have the shortest floating dispersal stage of the three species. White mangroves are
semi-viviparous and germinate inside the fruit during the approximately five-day dispersal,but
not while attached to the parent plant.
A4 - 16
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The mangrove communities are composed of both riverine (along the creeks) and basin forest
components. The species composition of mangroves within these two community components is
very distinctive. Riverine mangrove areas are almost exclusively composed of red mangroves
within the Clam Bay NRPA while all three species, along with buttonwood (Conocarpus
erectus), are found in the forest component.
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 will 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. This forest
community was the habitat affected by the mangrove die-off. The hand dug flushing channels
A4 - 17
were constructed throughout this community to increase the flushing capacity through tidal
inundation.
Associated plants within the mangrove habitat include: buttonwood(Conocarpus erectus), the
succulent ground covers, saltwort(Batis maritima) and glasswort(Salicornia cervicornis),
(especially where a fallen tree provides a break in the canopy and light penetration to the forest
floor) and, further inland and closer to freshwater sources,the leather fern (Acrostrichum
danaefolia).
FLUCFCS Code 642—Salt Marsh
At the interface between forested mangrove areas and the water management berm 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). For a more complete list of
common plant species found in this habitat see page 30. 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.
FLUCFCS Code 651 —Tidal Flats
Tidal flats are flat bottomed, sub- or intertidal habitats that lack an oyster or seagrass community
and are located inside the outer coastal margin. The two most significant environmental
characteristics that control a flat's infauna(benthic organisms that live within the substrate) and
epifauna(benthic organisms that live on the surface of the substrate) are: the height of the
substrate relative to mean sea level and the sedimentary consistency of the substrate. The
position relative to mean sea level dictates whether the habitat is emergent(in air) for part of a
tidal cycle or how deep below the water it is. This latter characteristic controls other physical
water quality measures, such as dissolved oxygen, the frequency and duration of hypoxic events,
and light penetration. Firmness of the substrate affects the capacity to support an epifauna by
both supporting the organism on the substrate and permitting the burrowing of the infauna.
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
A4 - 18
tidal flats include the templates established for the dredging, the resultant currents that could be
expected as a result of dredging, and the frequency of disturbance.
FLUCFCS Code 911 —Seagrass Beds
Seagrasses are flowering marine plants of shallow, tropical regions. With a creeping growth
form connected by horizontal rhizomes they serve to trap and anchor sediment. Both the grass
blades themselves and the surface area they represent provide food and attachment for marine
species. Seagrass beds are renowned for their value as nursery habitats and are legally protected.
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A4 - 19
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Turtle grass (Thalassia testundinum)just south of County boardwalk in Outer Clam Bay
Seagrasses rely on good light penetration to enable photosynthesis and are sensitive to reduced
tidal water quality. Growing in shallow regions,they are also vulnerable to physical damage by
boats. A variety of marine algae can be associated with grass species, differing in the lack of a
A4 -20
true rooting and vascular system. Several species of both brown and green alga have been
observed.
Other Benthic Habitats
Oyster Bars
Oysters (Croassostrea americana) are filter-feeding bivalves, which were once common within
the tidal creeks of Clam Bay(Humm and Rehm 1972). Oysters play a significant role in shaping
the environment in which they live by forming a hard structure upon which an intricate
biological community is built. Similar to coral reefs, oyster reefs are `biogenic' (formed by the
accumulation of colonial animals) and provide structure and surface area for numerous other
temporary and permanent species.
Providing complex habitat structure is the most fundamental of ecosystem services that oysters
provide. The structure provides a place for algae and non-mobile invertebrates to attach, as well
as a place for mobile invertebrates and fishes to be protected from predators. Although the
relationships between sportfish and oyster habitats are not as well studied as in other estuarine
habitats, such as seagrass beds,they are considered essential fish habitat.
The numerous ecosystem services provided by oysters can be summarized into three general
categories: habitat provision,water quality improvement, and shoreline stabilization. Oyster
reefs provide habitat to a diverse array of flora and fauna. The role of oyster habitat to the
estuarine food chain is highly significant, as discussed in the previous paragraph. Through their
feeding process oysters filter large quantities of water which transfers energy and material from
the water column to the benthic community, subsequently reducing turbidity and water column
nutrients. Through bio-deposition, nutrients are made available to the flora and fauna which
comprise the complex oyster bar food web.Additionally, oyster reefs stabilize sediments,
shorelines and adjacent habitats by buffering wave energy, further aiding water quality.
A4 - 21
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Oysters (Croassostrea americana) along the mangroves near the canoe ramp in Outer Clam Bay
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.
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.
A4 -22
Southern hard clam (Mercenaria campechiensis)from waterway south of Clam Pass
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, flushing and dredging.
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.
Hardbottom Communities
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.
A4 - 23
Hardbottom outcrop off of Clam Pass
Collier County has mapped this resource through side scan sonar surveys in 2005 and 2009 as
part of its beach renourishment project. The information received from the County shows that
the landward edge of this habitat is located approximately 250 to 300 feet offshore from the Pass.
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. The characteristics of some of these species (high rate of growth/reproduction,no
natural predators, easily dispersed, able to out-compete native species)make them invasive.
Some indigenous species (a species whose natural range included Florida at the time of European
contact circa 1500 AD or a species that has naturally expanded or changed its range to include
Florida)may also become invasive. Invasions by native and non-native species often follow an
alteration to ecosystem function, disruption of the food web, large-scale fragmentation of an
ecosystem and/or disturbance (e.g., clearing, fire, drought, etc.) of an area. While some native
species may become invasive,the establishment and dominance of non-native species is of
particular concern. The exotic species documented within the NRPA and those that have a
potential to occur within the NRPA are discussed in the following section.
Invasive and Problem Plant Species
The Florida Exotic Pest Plant Council (FLEPPC) maintains a list of exotic plants that have been
documented to (1)have adverse effects on Florida's biodiversity and plant communities, (2)
cause habitat loss due to infestations, and(3) impact endangered species via habitat loss and
alteration. To date, 9 non-indigenous plant species have been detected within the Clam Bay
NRPA which are listed by FLEPPC as Category I exotics. FLEPPC defines Category I plants as
A4 - 24
those that alter native plant communities by displacing native species, change community
structures or ecological functions, or hybridize with natives. 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. These definitions do not rely on the economic severity or geographic
range of the problem, but rather on the documented ecological damage caused by these plants
(FLEPPC 2013).
FLEPPC Category I plants observed within the Clam Bay NRPA boundary:
- Brazilian Pepper (Schinus terebinthifolius)
- 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)
Listed Species
Smalltooth Sawfish (Pristis pectinata)
A juvenile smalltooth sawfish was observed by Turrell, Hall &Associates, Inc. biologists in
2008 in the connector creek between Inner and Outer Clam Bays. 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.
This sawfish primarily occurs in estuarine and coastal habitats such as bays, lagoons, and rivers.
It does at times occur in deeper waters, however, and may make crossings to offshore islands. It
can tolerate freshwater. This fish is easily recognized by its flattened body and wing-like
pectoral fins. The mouth is located ventrally, and the eyes are positioned dorsally. The "saw" is
approximately 25% of the body's total length. It is widest at the base,with teeth more broad than
long, and spaced apart. The tips of the teeth are sharp, becoming blunt over time. Dorsally, it is
brownish or bluish gray body with a white underside. The maximum length recorded is 24.7 feet
(7.6 m); however, a length of 18 feet (5.5 m) is considered average. The average lifespan for the
smalltooth sawfish is unknown.
A4 - 25
On April 1, 2003 the U.S.National Marine Fisheries Service placed the smalltooth sawfish on
the Endangered Species List, making it the first marine fish species to receive protection under
the Endangered Species Act. Florida has also designated critical habitat areas to further protect
its habitat.
Mangrove Rivulus (Rivulus marmoratus)
This small fish has not been identified within the Clam Bay system in previous surveys or field
work but the mangrove habitat is appropriate, and they could be present in the upper reaches of
the mangrove forest. 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.
This fish can reach a maximum size of 2 inches (5 cm) in length, however it is more commonly
observed at lengths between 0.4-1.5 inches (1.0-3.8 cm). The head and body are maroon to dark
brown or tan, with small dark spots and speckling on the body, particularly the sides. The dorsal
surface is always darker than the creamy ventral surface. The color of the body is reflective of
the habitat, with light coloration in areas of light colored sediments and darker coloration in
environments with dark leaf litter substrates. A large dark spot surrounded by a band of yellow
is located at the upper base of the caudal fin in hermaphroditic individuals. Males lack this dark
spot and have a red-orange cast to their flanks and fins.
The mangrove rivulus was once listed as a threatened species in the Gulf of Mexico. However,
recently additional surveys have revealed the existence of numerous populations. In Florida it
has been downlisted to a species of special concern. In 1999, it was submitted by the National
Marine Fisheries Service as a candidate for protection under the Endangered Species Act. As of
yet, it has not been officially listed as endangered or threatened.
The main threat to the survival of the mangrove rivulus is habitat degradation and destruction as
well as exposure to pollutants. Disturbances that alter salinity and temperature as well as
vegetation cover may also reduce naturally occurring populations.
Loggerhead Sea Turtle (Caretta caretta)
Loggerhead sea turtles have been documented nesting on beaches within the Clam Bay NRPA.
Loggerheads are circurglobal, 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.
During the summer, nesting occurs primarily in the subtropics. Although the major nesting
concentrations in the U.S. are found from North Carolina through southwest Florida, minimal
nesting occurs outside of this range westward to Texas and northward to Virginia. Adult
loggerheads are known to make extensive migrations between foraging areas and nesting
beaches. During non-nesting years, adult females from U.S. beaches are distributed in waters off
the eastern U.S. and through the Gulf of Mexico,Bahamas, Greater Antilles, and Yucatan.
A4 - 26
Loggerheads were named for their relatively large heads, which support powerful jaws and
enable them to feed on hard-shelled prey, such as whelks and conch. The top shell (carapace) is
slightly heart-shaped and reddish-brown in adults and sub-adults,while the bottom shell
(plastron) is generally a pale yellowish color. The neck and flippers are usually dull brown to
reddish brown on top and medium to pale yellow on the sides and bottom.
In the southeastern U.S., mating occurs in late March to early June and females lay eggs between
late April and early September. Females lay three to five nests, and sometimes more, during a
single nesting season. The eggs incubate approximately two months before hatching sometime
between late June and mid-November.
Loggerheads occupy three different ecosystems during their lives: beaches (terrestrial zone),
water(oceanic zone), and nearshore coastal areas ("neritic" zone). Because of this,NOAA
Fisheries and the U.S. Fish and Wildlife Service (USFWS) have joint jurisdiction for marine
turtles, with NOAA having the lead in the marine environment and USFWS having the lead on
the nesting beaches.
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
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.
Gopher tortoises are one of the few species of tortoise that dig burrows. These burrows can be
up to ten feet deep and 40 feet long, and are as wide as the length of the tortoise that made it. In
addition to providing the tortoise a home, it has been documented that as many as 350 other
species also use the burrows including the indigo snake, Florida mouse, gopher frog, and
burrowing owl.
Gopher tortoises can live 40 to 60 years in the wild and average 9 to 11 inches in length. These
tortoises are superb earth-movers, living in long burrows from 5 to 45 feet long and up to 10 feet
deep that offer refuge from cold, heat, drought, forest fires, and predators. The burrows maintain
a fairly constant temperature and humidity throughout the year and protect the gopher tortoise
and other species from temperature extremes, drying out, and predators. The mating season
generally runs from April through June and gestation for the eggs is between 80 and 100 days.
The shell or"carapace" of the gopher tortoise is mostly brownish gray and the underside of the
A4 - 27
shell, or "plastron," is yellowish tan. Their front legs are shovel-like which helps them when
digging their burrows.
The gopher tortoise has been regulated in Florida since 1972 and has been fully protected since
1988. Despite the afforded protection, gopher tortoise populations throughout the state have
declined. As a response to the continuing decline of the species, a new management plan was
drafted and approved in September 2007 as a precursor to reclassifying the gopher tortoise from
a "species of special concern" to a "threatened species." The threatened status was approved and
went into effect on November 8, 2007.
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.
Piping plovers are small shorebirds approximately seven inches long with about a 19 inch
wingspan. They have sandy/grey colored plumage on their backs and crown and white
underparts. Breeding birds develop a single black breast band, a black bar across the forehead,
bright orange legs, and bill with a black tip on the bill. During the winter,the birds lose the
black bands, the legs fade to pale yellow, and the bill becomes mostly black.
Piping plovers breed in three geographic regions of North America: the Atlantic Coast (which is
where the Clam Bay NRPA is located), the Northern Great Plains, and the Great Lakes. Nesting
in the Atlantic Coast region occurs on coastal beaches, sand flats, and bars associated with
barrier islands, gently sloped and sparsely vegetated dunes, and washover areas cut into or
between dunes. Plovers from all three breeding populations winter along South Atlantic, Gulf
Coast, and Caribbean beaches and barrier islands,primarily on intertidal beaches with sand
and/or mud flats with no or very sparse vegetation.
Piping plover populations were federally listed as threatened and endangered in 1986. The
Northern Great Plains and Atlantic Coast populations are threatened, and the Great Lakes
population is endangered. Piping plovers are considered threatened throughout their wintering
range. The highest concentration of birds reported in winter censuses are found in Texas,
Louisiana, and Florida. In recent decades, piping plover populations have drastically declined as
breeding habitat has been replaced with shoreline development and recreation. (USFWS).
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.
Manatees are large, gray aquatic mammals with bodies that taper to a flat,paddle-shaped tail.
They have two forelimbs, called flippers,with three to four nails on each flipper. The average
adult manatee is about 10 feet long and weighs between 800 and 1,200 pounds. They eat a large
A4 - 28
variety of submerged, emergent, and floating plants and can consume 10-15%of their body
weight in vegetation daily. Because they are mammals, they must surface to breathe air. They
rest just below the surface of the water, coming up to breathe on an average of every three to five
minutes. It is believed that one calf is born every two to five years, and twins are rare. The
gestation period is about a year. Mothers nurse their young for one to two years, during which
time a calf remains dependent on its mother.
Protections for Florida manatees were first enacted in 1893. Today, they are protected by the
Florida Manatee Sanctuary Act and are federally protected by both the Marine Mammal
Protection Act and the ESA.
Other Species
Plant Species—List based on FLUCFCS Mapping
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
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 Juncus 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 boundary
COMMON NAME SCIENTIFIC NAME
American Oyster Crassostrea virginica
Brittlestar Ophiophragmus filograneus
Florida Crown Conch Melongena corona
Grass Cerith Bittiolum varium
Heart Urchin Moira atropos
Pointed Venus Clam Anomalocardia auberiana
Shell-encrusted tubes Polychaeta
Stout Razor Clam Tagelus plebeius
Trumpet worm tubes Pectinaria gouldi
Worm mud tubes
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
Horse Conch Pleuroploca gigantean
Mangrove Periwinkle Littoraria scabra angul Hera
A4 - 30
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 NAME
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 Lutjanus 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 Lutjanus anatis
Needlefish Strongylura marina
Permit Trachinotus falcatus
Pigfish Orthopristus chrysoptera
A4 - 31
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
LIZARDS AND CROCODILIANS
American alligator* Alligator mississippiensis
Brown anole Anolis sagrei
Brown basilisk lizard Basiliscus vittatus
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 marinus)
Green treefrog Hyla cinerea
Oak toad Anaxyrus quercicus
Southern leopard frog Lithobates sphenocephalus
Southern toad Bufo 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
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 Himantopus mexicanus
Blue jay Cyanocitta cristata
Blue-gray gnatcatcher Polioptila caerulea
Boat-tailed grackle Quiscalus major
Brown pelican* Pelecanus occidentalis
Brown thrasher Toxostoma rufum
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
Double-crested cormorant Phalacrocorax auritus
Downy woodpecker Picaides 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 falcinellus
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 Larus 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 caerulea
Loggerhead shrike Lanius ludovicianus
Long-billed dowitcher Limnodromus scolopaceus
Magnificent frigate bird Fregata magnificens
Mangrove cuckoo Coccyzus minor
Merlin Falco columbarius
Mocking bird Mimus polyglottos
Mottled duck Anas fulvigula
Mourning dove Zenaida macroura
Muscovy duck Cairina moschata
Northern bobwhite Colinus virginianus
Northern cardinal Cardinalis cardinalis
A4 - 35
Northern gannet Morus 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 delawarensis
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 fbrficatus
Tri-colored heron* Egretta tricolor
Turkey Meleagris gallapavo
Turkey vulture Cathartes aura
Western sandpiper Calidris mauri
White ibis* Eudocimus albus
A4 - 36
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 truncatus
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 rabbit Sylvilagus palustris
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
CLAM BAY NRPA MANAGEMENT PLAN(DRAFT)
Pelican Bay Services Division
July 2, 2014
Ver. 6.2
APPENDIX 5 - CLAM PASS
MAINTENANCE DREDGING
DESIGN CRITERIA
A5
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.
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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
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.
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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
volume within the template. The figure also shows the volumes within the template for 2004 and
2008 conditions.
Figure A5-16 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.
Fig A5-9
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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.
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PELICAN
prAil
. BAY
Pelican Bay Foundation, Inc.
June 26, 2014
Via Email Distribution
Pelican Bay Services Division Board of Directors
David Trecker, Chair
Municipal Service Taxing&Benefit Unit of Collier County, Florida
801 Laurel Oak Drive, Suite 605
Naples, FL 34108
Re: Proposed Maintenance Dredging of Clam Pass
Dear PBSD Board:
Thank you for providing the engineer's conceptual plans for the dredging template contemplated
for your permit application with the U.S. Army Corps of Engineer(ACOE) for a Nationwide
Permit. Pursuant to the Declaration of Protective Covenants and Restrictions for this property
(OR Book 966, Pages 1843 — 1863), Collier County "shall not apply for dredge or fill permits in
Park Site or Conservation Area from any governmental bodies, regardless of any future
amendments to the statutes or regulations of the United States or the State of Florida or as a
result of decisions of the courts of the United States or the State of Florida, without the prior
written consent of Declarant,which consent may be withheld in the sole and absolute discretion
of Declarant."
These covenants were part of a coordinated series of actions arising from the approval of the
initial Pelican Bay PUD and implementing the original ACOE permit for Pelican Bay. They
involve the imposition of restrictions on the Conservation Area, conveyance of that area and the
Park Site to the County, and adoption of a further set of restrictions governing cooperative
management and use of the Conservation Area and Park Site.
The intent clearly contemplates collaboration and discussion between the County and the
Declarant(or successor,in this case the Pelican Bay Foundation) on any matters concerning
the Conservation Area. This is all reflected in the original Declaration of Restrictions (OR
Book 966, Page 1830), Quit Claim Deed(OR Book 966, Page 1841)and Declaration of
Protective Covenants and Restrictions (OR Book 966, Page 1843).
The Assignment of Rights, Privileges and Obligations (Park Site and Conservation Area)dated
April 21,2009 and recorded in OR Book 4446,beginning on Page 1101 of the public records
of Collier County, Florida,and the Assignment of Certain Rights, Privileges and Obligations
dated March 7, 2003 and recorded in OR Book 3257, beginning on Page 2056 of the public
records of Collier County, Florida, places the Pelican Bay Foundation(Foundation)as the
successor to WCI as the Declarant.
Pelican Bay Foundation, Inc. • 6251 Pelican Bay Boulevard • Naples, Florida 34108
ooasaao�t (239) 597-8081 • (239) 597-6802 FAX • E-Mail: memberservices@pelicanbay.org
The Foundation, being fully vested in the right,power, and authority to enforce the above
referenced Declaration of Protective Covenants and Restrictions, offers the following input
with respect to its approval of a nationwide dredging application to the U.S. Army Corps of
Engineers, and the longer term plans for dredging contained in the most recent draft of the 10-
Year Management Plan.
I) U.S. Army Corps of Engineers Nationwide Permit Application. The Foundation is
supportive of Collier County/Pelican Bay Services Division pursuing the permit necessary
to maintain the Pass. However,this is a repeat of the same process followed in 2013 and
there were some elements of the last nationwide dredge which were detrimental to the
Foundation's property north of the Pass. Therefore, approval of a permit application will be
contingent upon three(3)requirements:
i) Consistent with the requirements of the Florida Department of Environmental
Protection(FDEP) companion permit required for dredging of the Pass, the
Foundation will expect the erosion damage to Foundation property to be restored.
This is specified in the FDEP permit"the meandered channel location will be filled
with beach compatible sand during the initial channel realignment." This activity
and requirement was executed under the last nationwide permit and will be expected
to be performed again.Exhibit A shows the amount of property loss the Foundation
has sustained from April 2013 to April 2014, and the Foundation has a right to have
this area restored.
ii) The Foundation has experienced significant and recurring scarping since the 2013
nationwide permit dredge. This is because the sand was placed only above the Mean
High Water Line(MHWL) creating an unnatural slope. Exhibit B shows the scarps
that have persisted, creating a hazardous condition for the recreational use of the
beach. Additionally,these scarps were not addressed by Collier County before the
start of turtle season. Exhibit C is an aerial taken on May 22,2014 and clearly shows
how the beach furniture must be set away from the escarpment line because of the
unsafe change of elevation. Since an element of the nationwide permit is that sand
must be placed above the MHWL and this will only exacerbate an already
unacceptable condition, other than the remediation expectation described in(i),the
Foundation will not accept any sand on Foundation property above the MHWL.
iii)For the 2013 nationwide permit dredge,the equipment used was mobilized and
accessed the dredging site from and through Foundation property on the north side of
the Pass. While the Foundation was able to accommodate the County's request for
this logistical consideration,this year,because of other projects the Foundation is
currently undertaking,the Foundation will not be able to accommodate access from
the north side of the pass. It will be necessary for the County to access the site and
mobilize the equipment for the work from the south side of the Pass,to minimize any
disruptive impact to the Foundation's property.
After the permit application is completed, including the above,please submit the final
application to the Foundation for final review and approval.
0033;406-I
2) 10-Year Clam Bay Management Plan. The Foundation is aware that the 10-Year
Management Plan(Plan) has reached its final draft form. The Board of County
Commissioners' (BCC) decided that the Pelican Bay Services Division is the exclusive entity
to advise the BCC on matters related to Clam Bay. However, because the Plan includes
dredging templates and guidelines upon which future dredging will be based, as well as other
activities which could fall within the scope of the Covenants,the Plan must be submitted to
the Foundation for review and approval.
Additionally,upon the BCC's decision in December of 2012 to transition exclusive advisory
responsibility for the Clam Bay system from Coastal Zone Management to the Pelican Bay
Services Division,the Foundation transmitted and advised the Pelican Bay Services Division
of all the water quality work jointly accomplished by the Foundation and Coastal Zone
Management over the preceding several years. It would appear that the proposed management
plan does not adequately address the water quality concerns that were the subject of these
studies or how they will be managed to meet regulatory requirements.
From our experience,water quality is the primary metric the State of Florida uses to
determine the health of water bodies. Therefore,the Plan should recognize that Clam Bay now
has site-specific water quality standards that were reviewed and approved by both FDEP and
the USEPA. Those standards are now contained within the State of Florida's Water Quality
Standards (Chapter 62-302.532). The Plan should monitor,track and report on the water
quality of Clam Bay against these and any recently revised FDEP standards.
The Foundation has historically taken very proactive positions regarding the safeguarding and
stewardship of the Clam Bay estuary. We can all agree that the health of the estuary is of utmost
importance to the community. The original developers of Pelican Bay also recognized the
importance of the estuary and sought to best protect it by deeding the property to the County
while creating a contractual set of checks and balances with the Protective Covenants and
Restrictions both prior to and attached to the deed.
To that end,the Foundation looks forward to working collegially, and constructively, with
Collier County and the Pelican Bay Services Division to accomplish a timely resolution to these
matters. As the Foundation has in the past, it will bring to bear the resources necessary to ensure
that the estuary,and other Pelican Bay natural resources areas,receive the highest and best care
and attention. We welcome the opportunity to have the Foundation's consultants work with the
County's I PBSD's consultants to address the items identified above.
Sincerely,
PELICAN BAY FOUNDATION
David Cook
Chairman
00353406-1
cc: Pelican Bay Services Division Board of Directors (via email)
Collier County Board of Commissioners (via email)
Leo Ochs, Collier County Manager(via email)
Neil Dorrill, Pelican Bay Services Division Administrator(via email)
County Attorney(via email)
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Pelican Bay Services Division
July 2, 2014
Ver. 6.2
APPENDIX 6 - EXHIBITS
A6
MEMORANDUM
DATE: June 10, 2014
TO: Mary McCaughtry, Operations Analyst, Pelican Bay Services Division
FROM: Wanda Rodriguez, ACP
Office of the County Attorney
RE: Pelican Bay Services Division Advisory Board
As you know, we currently have two vacancies on the above referenced advisory committee. The
vacancies were advertised and citizens interested in serving on this committee were asked to submit
an application for consideration. I have attached the applications received for your review as
follows:
Kenneth J. Dawson
891 Turtle Ct.
Naples,FL 34108
Bruce A. Beauchamp
7058 Barrington Circle, Unit 102n
Naples,FL 34108
Henry Bachman
7515 Pelican Bay Blvd. #16C
Naples,FL 34108
Please let me know, in writing, the recommendation for appointments to the advisory committee
and I will prepare an executive summary for the Board's consideration.
Please categorize the applicants in areas of appointment. If you have any questions, please call
me at 252-8123.
Thank you for your attention to this matter.
Attachments
Advisory Board Application Form
Collier County Government
3299 Tamiami Trail East, Suite 303
Naples,FL 34112
(239)252-8603
Application was received on: 6/5/2014 3:56:08 PM.
Name: Kenneth J Dawson Home Phone:: 732-991-0086
Home Address:: 891 Turtle Ct.
City:i Naples Zip Code: 34108
Phone Numbers:
Business:; 732-991-0086
e-Mail Address:!napleskendawson@aol.com
Board /Committee Applied for:Pelican Bay MSTBU Advisory Committee
Category:Not indicated
[Work Place:,`Premiere Plus Realty Co.
'How long have you lived in Collier County::5-10
How many months out of the year do you reside in Collier County::I am a year-round
resident
Have you ever been convicted of any offense against the law?!No
Not Indicated
f.Do you or your employer do business with the County?;No
Not Indicated
NOTE: All advisory board members must update their profile and notify the Board of County
Commissioners in the event that their relationship changes relating to memberships of
organizations that may benefit them in the outcome of advisory board recommendations or they
enter into contracts with the County.
Would you and/or any organizations with whichyouu are affiliated benefit from decisions or
recommendations made by this advisory board? No
Not Indicated
Are you a_registered voter in Collier County?IYes
Do you currently hold an elected office? No
Do you currently or ever served on a Collier County Board or Committee? No
Not Indicated
Please list your community activities:
Oak Lake Sanctuary Condominium Association.
Education:;
Weehawken High School Attended Bergen Community College
Experience:,
Extensive Automotive and Business Background. General Manager Monmouth Chrysler
Plymouth. Owner Dawson Automotive,Dawson Auto Collision, Dawson Auto Sales and
Dawson Sales and Consulting. Sold Business. Licensed Florida Real Estate Agent with Premiere
Plus Realty Co. since 09/14/2010.
MEMORANDUM
DATE: June 6, 2014
TO: Elections Office
ShavontaeDominique@colliergov.net
FROM: Wanda Rodriguez, ACP
Office of the County Attorney
RE: Voter Registration- Advisory Board Appointments
The Board of County Commissioners will soon consider the following individuals for appointment to one of the
county's advisory committees. Please let me know if those listed below are registered voters in Collier County.
Also,please list the commission district in which each applicant resides.
Pelican Bay Services Division
Advisory Board COMMISSION DISTRICT/REGISTERED VOTER
(enneth J. Dawson
891 Turtle Ct. 2(yes)
Naples, FL 34108
Thank you for your help.
{
MEMORANDUM
DATE: June 9,2014
TO: Elections Office
ShavontaeDominique@colliergov.net
FROM: Wanda Rodriguez, ACP
Office of the County Attorney
RE: Voter Registration- Advisory Board Appointments
The Board of County Commissioners will soon consider the following individuals for appointment to one of the
county's advisory committees. Please let me know if those listed below are registered voters in Collier County.
Also, please list the commission district in which each applicant resides.
Pelican Bay Services Division
Advisory Board COMMISSION DISTRICT/REGISTERED VOTER
Bruce A. Beauchamp
7058 Barrington Circle, Unit 102n 2 (yes)
Naples, FL 34108
Thank you for your help.
•
Advisory Board Application Form
Collier County Government
3299 Tamiami Trail East, Suite 303
Naples,FL 34112
(239)252-8603
Application was received on: 6/9/2014 10:58:32 AM.
Name: 1Bruce A. Beauchamp Home Phoney 1239-566-0693
Home Address: 17058 Barrington Circle Unit 102n1
City: Naples! Zip Code:, 34108
Phone Numbers
Business: 401-996-9474
e-Mail Address:''brucebeauchamp@cox.net
'Board/Committee Applied for Pelican Bay MSTBU Advisory Committee
Category:,Not indicated
'Work Place::Retired
How long have you lived in Collier County: 5-10
'How many months out of the year do you reside in Collier County:,6-9
!Have you ever been convicted of any offense against the law?No
Not Indicated'
!Do you or your employer do business with the County?No
Not Indicated'
NOTE: All advisory board members must update their profile and notify the Board of County
Commissioners in the event that their relationship changes relating to memberships of
organizations that may benefit them in the outcome of advisory board recommendations or they
enter into contracts with the County.
Would you and/or any organizations with which ou are affiliated benefit from decisions or
recommendations made by this advisory board? l
1
Not Indicated
Are you a registered voter in Collier County? Yes
Do you currently hold an elected office?INo
Do you currently or ever served on a Collier County Board or Committee?,1No
Not Indicated
Please list your community activities:
Board of Directors Barrington Club Association
Education:
B.S. degree in Civil Engineering University of R.I. Class of 1958 Real-estate broker license in
R.I. expired in 2009
Experience:
43 years of employment by Narragansett Improvement Co. in Prov. R.I as a Supt., and Vice
President in charge of operations. The company constructed subdivisions, including site clearing,
cuts& fills, installation of water, sewer, utilities curbing,paving. We also bid and preformed;
various municipal and state jobs.
MEMORANDUM
DATE: June 10,2014
TO: Elections Office
ShavontaeDominique@colliergov.net
FROM: Wanda Rodriguez, ACP
Office of the County Attorney
RE: Voter Registration-Advisory Board Appointments
The Board of County Commissioners will soon consider the following individuals for appointment to one of the
county's advisory committees. Please let me know if those listed below are registered voters in Collier County.
Also,please list the commission district in which each applicant resides.
Pelican Bay Services Division
Advisory Board COMMISSION DISTRICT/REGISTERED VOTER
Henry Bachman
7515 Pelican Bay Blvd. #16C 2 (yes)
Naples, FL 34108
Thank you for your help.
Advisory Board Application Form
Collier County Government
3299 Tamiami Trail East, Suite 303
Naples, FL 34112
(239)252-8603
Application was received on: 6/10/2014 11:44:40 AM.
Name: 'Henry Bachman Home Phone: 239-325-9234
Home Address: 7515 Pelican Bay Blvd#16C
City: Naples Zip Code: 34108
Phone Numbers
Business:
e-Mail Address: h.bachman@a,ieee.org
Board I Committee Applied for: Pelican Bay MSTBU Advisory Committee
Category: Resident
tWork.Place: Retired
f Howlong have you lived in Collier County: 5-10
How many months out of the year do you reside in Collier County I am a year-round
resident
'Have you ever been convicted of any offense against the law?No
Not Indicated
tDo you or your-employer do business with the County?No
Not Indicated
NOTE: All advisory board members must update their profile and notify the Board of County
Commissioners in the event that their relationship changes relating to memberships of
organizationsthat may benefit them in the outcome of advisory board recommendations or they
enter into contracts with the County.
Would you and/or any organizations with which you are affiliated benefit from decisions or
recommendations made by this advisory board? No
Not Indicated
Are you a registered voter in Collier County? Yes
Do you currently holdan elected office? No
Do you currently or ever served on a Collier County Board or Committee?No
Not Indicated
Please list your community activities:
Director, Claridge Condominium Association Member, Pelican Bay Property Owners
Association Member,Mangrove Action Group The Foundation of the Institute of Electrical and
Electronics Engineers; Director, 1986-2002; Treasurer, 1991-1993; VP Projects, 2000-2002;
President, 1987, 1994-1999; President Emeritus,2003 Polytechnic Institute of New York
University; Trustee 1988-2008 Polytechnic Institute of New York University Alumni
Association; President, 1987-1990: Director 1987-2000, 2009-2011 Long Island Forum for
Technology; Director, 1982-2009; Chairman, 1986-1987 Friends of the Long Island Museum of
Science and Technology; President, 1994-1996;Director 1994-2009 Huntington Arts Council;
Director, 1994-1996
Education:
Polytechnic Institute of New York University,BSEE, 1951 Polytechnic Institute of New York
University, MSEE, 1954. Harvard University, Advanced Management Program, 1972
Experience:
Wheeler Laboratories, 1951-1970; President, Director, 1968-1970 BAE SYSTEMS, Sensor
Systems, Identification and Surveillance, 1970-2009; Vice President, 1973-1995;Part Time,
1996-2009, Director Technical Marketing;Retired 2009 Wireless Telecom Group
(AMEX:WTT); Director, 2000-Present Center for Advanced Technology for Sensor Systems at
SUNY, Stony Brook; 2000-2011 Institute of Electrical and Electronics Engineers; Director,
1981-1982, 1984-1988; Executive Vice President, 1984; Treasure, 1985; President, 1987
George Hermanson
From: Waters, Daniel[dwaters@a sfwmd.govj APPLICATION NUMBER
Sent: Friday,May 16, 2014 9:16 AM
To; George Hermanson �t
Cc: McKennaJack '14 0 3 3 1 - 1 6 #
Subject: RE: Pelican Bay Commons Appl. No. 140331-16
Sorry for the delay in responding, This approach works for me and will satisfy the WQ comments in our letter. Let me
know If you need anything else on our end.
Dan Waters, PE
South Florida Water Management District
2301 McGregor Boulevard
Fort Myers,FL 33901
Ph:(239)338-2929(ext.7763)
Fax: (239)338-2936
Email:dwaters@sfwmd.gov
From: George Hermanson ma to' v.rgeHermansonfthmeng.com]
Sent:Thursday, May 01, 2014 1:22 PM
To: Waters, Daniel
Cc: McKennaJack
Subject: Pelican Bay Commons Appl. No. 140331-16
Dan,
As follow up to our meeting on Tuesday,this is my summary for the response to comment Nos.2 and 3 in your
staffs letter dated April 24". These comments had to do with discharge rates,detention volumes and water
quality resulting from the modifications to this storm water management system. As your staff may recall from
the preapplication meeting of last August 5th,the plan was to slightly modify and relocate the detention areas
and maintain the volume of detention of one inch over the drainage area,which was the original basis for
permitting the site.
Our first submittal included plans and calculations verifying that one Inch of detention would be maintained.
We also pointed out that we were adding a control structure to regulate discharge and control the detention
storage in the system,which currently did not exist. In Tuesday's meeting you recommended,as a response to
these comments,that we provide additional retention volume for the added improvements on the west side of
the site. This volume would occur below the control elevation of 4.0'and the storage quantity would be one
inch over the added area,plus 50%per current SFWMD water quality policy,then credited by 50%per the Basis
of Review.
Attached is a site plan highlighting the added area of improvements which is approximately 24,200 square feet.
The retention volume is:
24,200 x 1/12 x 150%x 50%=1,513 CF
The new westerly detention area will provide this retention volume, The bottom of this area is approximately
3,590 SF with an average elevation of approximately 3.5 ft. (0.5 ft,below control),and this bottom area will be
left at existing grade. The retention volume provided is:
3,590 x 0.5= 1,795 CF
Therefore,this detention area will also accomplish your recommended retention.
1
We request that you confirm that the above adequately addresses your staff's comments and represents an
acceptable design,or please let me know if you have any additional questions. We appreciate your assistance.
George T-I. 1-Iermanson,P.E.
Senior Vice President/Principal
Hole Montes,.Inc.
950 Encore Way
Naples,FL.34110
Phone: 239-254-2000
Fax: 239-254-2099
Cell: 239-450-1483
Georgehermanson@luneng.com
We value your opinion. Please take a few minutes to share your comments on the service you received from the
District by clicking on this link.
•
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Professional engineers,planners&land surveyors
7 400 Tamiami Trail North,Suite 200.Naples,Florida 3.1108-(239)597-3111-FAX:(239)566-2203
PELICAN BAY COMMONS DRAINAGE
Permit and Design Summary
July 2,2014
SFWMD Permit#11-00065-S
1978 Permit(04178-C)
The 10 acre park(Parcel J)was excluded from the water management plans(Sheet 4 of 43,attached).
The park was located at the northwest corner of Drainage System II. The Impervious Surface Coverage
(Table 2,attached) indicated that "Park"was 10.02 acres within System II and would be 15%impervious
surface.
1980 Permit(X000000561)
A Permit Modification was issued Jan. 10, 1980 for the Amenity Pod Park(permit attached). The park
was proposed with a building, roadway, parking area,and tennis courts with a 1.3 acre shallow
detention area connected by culverts. The project description and exhibit in this permit shows that the
park is located between System II and System III. One 19"x30" pipe connected the park detention area
to the Drainage System II to the south.
The Permit Summary indicates that the Park development area is 4.6 acres; however,the SFWMD Board
Meeting project description and the engineer's report indicate that the total Park property is 10
acres. "Of the 10 acres designated as park,approximately 33%will be developed,the rest will be left as
natural vegetation". The permit information also states"the runoff will then become part of the water
management system of Pelican Bay in which it will be discharged through control weirs to the wetlands
via spreader swale".
Stormwater calculations were found that indicate the 4.64 acre park in post development would be 58%
impervious. Although not explicitly stated in the permit,this equates to 2.69 acres impervious coverage.
1998 Permit(980717-16)
A Permit Letter Modification was issued Aug. 27, 1998 (attached),for a 4,800 sq.ft. building addition and
asphalt paving of an existing brick paver area behind the building. The plans by Kepple Engineering, 2
sheets were also permitted by Collier County at that time.
The SFWMD and County plans(2 sheets attached) included new trench drains and storm inlets around
the building,discharging through two 12" PVC pipes directly to the west vegetation area. These pipes
were shown on the plans, but were not noted in the project description. There was no indication of
proposed water quality or stormwater attenuation volumes for the site.
1999 Permit(981221-14)
A Permit Letter Modification was issued Jan. 28, 1999(attached),for relocation of a dumpster pad. No
plans were included,however the same plans by WJ Johnson&Assoc. were also permitted by Collier
County at that time.
Collier County Site Development Plan permits(SDP)
1998 SDP (98-99)
The oldest SDP we found was SDP 98-99,approved Aug 20, 1998,which coincides with the 1998 SFWMD
Letter Modification by Kepple Eng.for the 4,800 sq.ft. building addition and paving area. These plans
show the main building,all ten tennis courts,and all the parking lots as"existing". These"existing"site
improvements were constructed at some time prior to 1998. Collier County historical aerials(attached)
show that in 1985 the main building,four tennis courts,and portions of the parking lot existed. The
1995 aerial shows the additional six tennis courts and parking were added at some time between 1985
and 1995.
We could not find Collier County or SFWMD records indicating that all of the original "existing"site
improvements were reviewed and approved. Because the original building and portions of the tennis
courts and parking were constructed prior to 1985,it is likely that these improvements would have been
shown on a Building Permit application,which pre-dated the Site Development permit process.
2003 SDP (AR-3604)
An SDP Insubstantial Change (letter attached)from 2003 (SDPI-2003-AR-3604) permitted some new
parking spaces along the north and west parking lots,and the relocation of the 8'wide path toward the
west. The County SDP review comment response letter from Feb.27, 2003, indicates that"a letter mod
from SFWMD will be forthcoming and no water quality treatment is required". The site plan (attached)
shows the proposed changes but does not indicate any proposed stormwater improvements. No
SFWMD permit modification was found.
2003 SDP (AR-4213)
This SDP Insubstantial Change(SDPI-2003-AR-4213)was permitted June 23, 2003,to permit the Phase 2
(west) improvements as previously shown on the AR-3604 SDP plan. There were some additional tree
removals and minor revisions to the bike path.
Other Relevant Documents
1981 PBID Review
Photo copy portions of a plan from January 1981(5 sheets,attached)show the original parking lot and
tennis court site plan design. This plan was reviewed by PBID and stamped/checked "approved as
noted"and "water management". Although reviewed by PBID's District Engineers,we found no
evidence that this plan was submitted and reviewed by Collier County and SFWMD. It is possible that
this plan could have accompanied a County Building Permit for the Commons,which was customary at
that time. These plans show the 30 linear feet of 19"x30" discharge culvert to the south,which
coincides with the design in the 1980 SFWMD Permit Modification.
2014 Design and Permitting
Plans have been submitted by Hole Montes&Associates to Collier County(PL2013-1389)and to SFWMD
(140331-16). The plan includes modifying existing parking lot circulation and relocation of the tram
pathway and new tram building,and other minor adjustments. The general drainage design and flow
patterns of the existing site will remain, in that the parking lot sheet flows into storm inlets and pipes
with two primary discharge points:the northwest corner discharge point into the vegetation preserve,
and the south discharge point into the System II shallow detention area,and one secondary discharge
point:the two 12" PVC pipes from the building trench drains to the vegetation preserve.
The south discharge point is an existing 19"x30" diameter pipe. This is an open pipe that has been
connected to System II since the early 1980's and will remain in place. System II drainage is controlled
by the water management berm (tram pathway) and nine discharge weir structures. The northwest
discharge currently consists of two 14"x23" pipes that discharge directly to the vegetation preserve
(open pipes). Currently,this open pipe discharge is not controlled by a structure,which allows
stormwater discharge to flow directly into the preserve. The new design will reconfigure the 14"x23"
pipes to capture the stormwater runoff and collect it in a proposed detention area. According to the
design calculations,this area provides the 1"water quality volume required by SFWMD(see attached
email correspondence from Daniel Waters of SFWMD),and detains the stormwater prior to bleed-down
discharge to the preserve via a 3"diameter circular orifice. The two 12" PVC pipes around the building
will remain. The existing detention area along the east side of the tennis courts will remain,which
continues to provide detention storage volume prior to discharge off-site.
The previous County and SFWMD Permits did not identify a proposed impervious coverage by land use
(parking lots,sidewalks, buildings)and did not quantify the proposed water quality storage or
attenuation volumes. There was only reference in the original permits to the 15% impervious coverage,
and later the 58%impervious coverage. So far to date,the current plan is the first we have found that
identifies the existing and proposed impervious coverage by land use categories. An Impervious
Coverage by Land Use Table is included immediately following the Conclusions below. As shown in this
Table, impervious coverage will increase by approximately 4%from existing percent impervious.
Conclusions
The original SFWMD Permit in 1978 allocated 15%impervious coverage for the 10 acre Park site. The
1980 Permit provided for 58%impervious coverage of the 4.64 acre developed park area (2.69 acres
impervious). In 1981 site plans were reviewed by PBID District Engineer that generally coincide with the
1980 SFWMD Permit. These plans show the tennis courts and parking lot and perimeter driveway.
There were no plan or permit documents found after 1981, until 1998 when the Kepple plans made a
minor change to the site, and showed all ten tennis courts and parking lots as existing. The subsequent
1999 and 2003 permit changes were minor changes to the parking spaces and path. Each of the plan
and permit changes done after 1981 did not provide a land use table of site areas by uses,and did not
quantify the provided water quality or attenuation volumes. Although not specifically stated in the
permits,the 0.5 acre detention area along the east side of tennis courts and the network of swales and
pipes between the parking lots appears to provide the typical minimum requirement of 1"water quality
volume on site.
The 2014 plan proposes some minor changes to the parking circulation, pathway and tram building. The
proposed impervious coverage is an increase of 4%of the existing impervious area. Approximately 0.37
acres impervious area (sidewalks) is being added and 0.06 new detention area is added. The new
detention area represents 14%of the new land area,which is within the typical parameters of percent
water management land area provided. As stated in the SFWMD Permit Modification,this new 0.06
acre detention area provides the required 1"water quality volume for the new development area.
The south discharge point(19"x30" pipe)will remain in operation as it has since the early 1980's.
Approximately the southern half of the Commons park site drains toward this discharge pipe. The
proposed improvements on the south portion of the site are limited to new sidewalks,which should be
insubstantial to the existing runoff contributed to this pipe. The total flow capacity of this existing pipe
does not change,so the pipe should flow at about the same rate(cubic feet per second)when flowing at
capacity.
The 12" PVC discharge pipes from the building will remain in operation as they have since 1998.
Stormwater runoff from building roofs is considered"clean water"and is typically not required to
provide water quality storage on the site. For this reason the existing direct discharge to the preserve
should not be a problem. However,there are trench drains and inlets connected to one of these pipes
that can allow some parking lot runoff to enter this discharge point. There have been reports from
residents that dirty water and debris was seen running into the preserve. This situation should be
remedied by adding storm filters within the inlets or diverting this water into a sediment trap.
The northwest discharge pipes currently discharge directly into the preserve. These pipes will be
reconfigured to capture the runoff in a new detention area. The new control structure will slow down
(detain)the release of water into the preserve to provide additional water quality treatment.
There are four questions posed by the PBSD with responses below,based on the information
discovered.
Would the project result in the impervious limit being exceeded in the basin in which the Commons is
located? Yes, based on impervious areas identified in the original permits. The 10 acre park at 15%
impervious was included in the System II area in the original 1978 permit. On the plan (Sheet 4 of 43)
the park appears intended to be a part of System II, but Parcel J is located between the containment
berms between System II and System III. The park was then presented as 58%impervious(equivalent to
2.69 acres coverage)in the 1980 permit. The permit exhibit and language indicated that the park may
not have been within a particular basin but discharges to System II. Subsequent permits including the
current Permit Modification have included all of the park impervious areas as"existing",although these
areas may have exceed previous identified coverage. Because of the sparse permit documentation it is
not clear whether the park is definitely in its own unidentified basin,or if it is subject to a maximum limit
within System II.
Is the Commons water management area on a drainage easement that is part of the PBSD master
drainage permit? No,there do not appear to be drainage easements within the Commons site over the
water management areas. There is a drainage easement along the south of the property(OR 943, Pg
1865)that likely was relocated or vacated to accommodate the acquisition of 0.15 acres and
construction of the Commons parking lot,where the System II berm used to be. A title search is being
requested to clarify easements.
Would the Commons project represent a substantial change to the existing Commons site development
plan? No,the new impervious area is approximately a 4%increase to the existing percent impervious
area. Additional dry detention storage and water quality treatment is being provided for the new area.
Would the Commons project affect a platted or recorded property interest? No,not substantially. The
new improvements are proposed within the Commons property. There are two portions of the path
that will be constructed on adjacent properties: one sidewalk connection to the south and one tram
connection to the north. The proposed impervious coverage and drainage changes are not substantial
compared to today's existing conditions and the 4%increase is being compensated in the new dry
detention area.
ill '
a..' 4 5 =
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. TABLE 2
:fes'` mrstvious SURlACE COVERAGE
•'....3•q:'". . . Impervi
o
=• Land Use • Average _Isoervioos Surface
•s t .
;. ... System no. I 542 30.49
...,r...,.. Cluster Single Family (Grp. 2) 56.46 462 21.34 % 1
!�ulti--Stott' Residential (Grp. 4) 46.8344.56
Commercial 59.41 752
System No. II 133.30 40Z 53.32
Single Family (Grp. 1) 19.86 40Z 50.32
Cluster Single Family (Crp. 2) ps.11
• Carden Apt. 6 Multi-Stott/ x.95 49Z 10.27
•:' Residential (Crp. 3 & 4) 492 10.27
. ;';r. Mniti-Story Residential (Crp. 4) 54.94 46462 24.27
Utility 19.0 152 1.20
Park 10.02
Single Family (Grp. 1) 11.20 402 4.48
542 23.04
Cluster Single Family (Grp. 2) 42.66 9f.5!
• Carden Apt. i lbltl-Story
. , .J Residential (Grp. 3 6 4) 9t
•
45.84.32.27 i92 21.09
."
i i u1ti-Story Residential (Crp. 4) 8 2S 61 462 17.29
Commercial 21.08 •
Sstem'lbIV
119.76402
• Single Family (CCP• 1) 97
Closter single Tally (Grp. 2) 104.75 542 'Litt,
. Garden-Apt. & 151ti-Stott' 61.84 492 �•�
" Residential (Grp. 3 6 4) 492 30.30
-:�? Mitt-Story Residential (Grp. 4) 32.86
System Ile. V 96.01 542 51.83
• • cluster Single Family (Crp. 2)
Carden Apt. 6 Mslti•Story miNati-StoryResidential (a 58.44 492 -
7. 3 6 4)
lti-Ston! Residential 502 4.57
4
•
fdsmtial (Gap. 4) 46.00 31.56
School Commercial 45.00 302 13.50
•
School
•
1 . .
:-.124ear'01
HOLE. MONTES AND ASSOCIATES , INC.
Consulting Engineers—Lend Surveyors
115 TENTH STREET, SOUTH
P. O. BOX
OR 1516
RECEIVED NOV 2 6 ,, (
NAPLES, FLORIDA 33939lint
PHONE: 262-4617
November 12, 1979
Richard A. Rogers
r?e/ne;4//-46P- 6..5.<5 4f l
Director, Resource Control „y
SOUTH FLORIDA WATER MANAGEMENT DISTRICT S- 4111
P. 0. BOX "V” j f
West Palm Beach, Fla. 33402
64
RE: Pelican Bay Amenity
Pod Park X .2
File No. 79.13
Dear Dick:
Enclosed please find a report outlining the proposed water manage-
ment plan for the Pelican Bay Amenity Pod Park. As you will note
from the enclosed report, the water management plan calls for
storage of storm water runoff in natural detention areas located
within the park site with a final discharge into System No. II.
Basically all the other criteria used in designing the Pelican
Bay System was used in designing the park drainage system.
We request that you review the enclosed material in order that a
modification to the Pelican Bay Water Management Plan can be made
to permit the construction of the proposed improvements to the
Amenity Pod Park area.
Should you have any questions regarding this matter, please do
not hesitate to give us a call.
Very truly yours,
OLE, MONTES., & ASSOCIATES, INC.
�.:C.
` aniel W. Brun l.-ige, P.E.
DWB/pas
Enclosures (1 sets)
cc: Mr. &lily Schmoyer,
Cori' 'ridge-Collier Prop.
HYDROLOGIC CALCULATIONS
HOLE, MONTES & ASSOCIATES, INC.
f!arol A. Merkel. , E. I.
-Daniel W. Brundage, P.E. ,
Florida Registration No.; 18915
NOV 1 2 1979
Stanley W. Hole and P, s ziates, Inc.
• Consulting Engineers sHELT HO_ -- DF Z --
P.O Box 1516 ,- ( _ -� ^�)�
NAPLES, i LORIDA 33939 CALCULATED BV__ DATE
(813) 262-4617
CHECKED BY-- .0.1/V. e_,... . . DATE --•7
sCAtE.
I tl f•L`v =7 l' W q l/' v: /• `4 ; [ c'// TC::'/7 T/!.?( c•ire.:,:7:) ..
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Pre,- cle.‘) l( ,-r,.Lc-,-t C N , • •
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'NY\O" _ ( P7C. 5\)2- (Pt 0.8E)) c 7.5 �.` .
..0 N -• /000 (5 4- /p) - 91/ .
rt
("U;/-" de kR.io rr,,i •. CA) -
I S. % Carl 176 i7 -== S , _�"-5)(0,60 ;n) = O.y6--,i)
5e vo Im per.J7005
,5.= G.,iS"(/.- , s )= O../9 ilii ,
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P • �vc f} rce- . _
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. _fxr,.,-k di5 ixkr- e. - tF,= 5,7 cc5/i n
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2 Urt;+-r drov r4 cn pro,:ffan�
rg
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co,\\ = iI 1 O. 5 .t
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-Tc = /—1.1a-1::'� 1
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Hoak Q = 21 .05c s
g.s-1- clue loprict2 di5cloo ,'.5 -
51-0.9,..../510rajc. roc)fit)c' yielded a n/ax: a'i:,s . r�tfr e
of Co�> Oa 54 ale_ 4.37 /-ts L
6,.c ,-.7. 1 2 \ 05- (' K..
BEGIN JOE: :
00 : 00 : _:: 1 ; ASSOCIATES
STANLEY IA. HOLE t•:
STAGE DISCHARGE ROUT ROUTING
DESIGN STORM f RE.C:!UE,NCY= 25 YR DURATION 24 HRS
DRAINAGE I=II:EA= 4. 64 ACRES CN= 98
LAKE _THUE:'STURHGE DATA VOLUME 1ME AC: FT
TAGE IF"f AREA AC:
3. 50 ' 1. 32 a 00
4. 00 1. SI.' a
71
4. 50 1. 71 1. 52
5. 00 1. 91 2. 42
5. 50 100R OA 252. 90
D11 S•C:HFIRGE STRUCTURE
n.'' OVAL ORIFICE SI ZE= 30 I N. 19 1.N. INVERT ELE'V= 3. 5
TIME RR] N CUM RU TOT RO DIS DIS TOT DIS VOL ST STAGE
HR IN IN AC FT C. f=. S. HC FT AC FT RC FT FT
O. 00 O. 00 O. 00 O. 00 O. 00 0. 00 a 00 O. 00 <:. 50
10.
00 1. 75 _1_ 52 0. 59 0. 44 0. 37 C.Y. 3 • R. 22 3. 6..11. ,
00 2. 21. L. 98 0. 77 0. 82 a 07 0. 4 4 0. 32 . . :
11. SO 2 62 2. : 9 afl 92 1. 25 0, 05 (1 0. 41
11. 75 3 5 .;. 61 :1., 40 .3. 29 0. 07 1,;1 ";-_ . 0. 84 412. ..
0 5 38 5. 14 1.. 99 5. 05 0. 13 0 •
:._ 1. 30 4.
12. 50 5 98 '-ti. `r'a• %:' 5. 95 29 :1,-..
1
.-
1 00 6 29 6. 05 2. 34 5. 3:2 0. 22 J. 15 1. 19 4, is s
14. 00 6 71 G. 47 2, 50 4 20 0. 35 s. 50 1. 00 4. 18
16. 00 7 00 ,_. 76 2. 62 2. 55 0. 42 1. 92 0. 69
a21 0. 53 3 8718. 00r 31 7F.��`� :?. i' :1.. i'ki Hi. 'i.+
20. 00 7 60 7. 36 2. 85 1. 25 0. 21 2. 41 �43 80
24. 00 8 20 7. 96 3. 0:= 0 93 0. 31 2. i' 0. 35 7 c
END JOB :
00 : 11 : 34
HOLE. MONTES AN , ASSOC . , INC .
CONSULTING ENGINEERS—LAI41) SUHVI YCNiS
File No. 79.13
stir ICAN BAYPARK
Water Management Plan
Permit Aprs3.ication
A. Purpose
This report is presented to the South Florida
Water Management District in order to obtain a permit for
construction approval of the proposed Amenity Pod Park in
Pelican Bay.
B. Location
The Pelican Bay Amenity Pod Dark is a 10-acre
parcel of land bounded on the east by Pelican Bay Blvd. , on
the south by drainage system no. II berm, on the north by
drainage system no. III berm and on the west by the Pelican
Bay P.U.D. zoning line (see Figure 1) .
C. Land Use
The park is planned as a central community recreation
area providing space for court, games', picnic tables, and an
elevated boardwalk.
PELICAN FAY PA' K
Page 2 of 4
01 th • 10 acres dc:.i r,Jnated as .Lhe park, ars
33% will. 1. 3 developed, the rest will be left as ural veg-
etation.
D. Existing Lrainage
The Pelican Bay Park area is presently undeveloped. The
natural vegetation consists of pine palmetto lands in the
easterly portion and transitions to lowland vegetation (hard-
wood hammocks, black rush marsh, etc.) . The existing ground
elevation in the park varies between 4.8' m.s.l. to 3.0' m.s.l.
Drainage occurs naturally with runoff flowing from east to west
and eventually enters the Clam Bay System.
E. Concepts of the Proposed Water Management Plan
The proposed water management plan is similar to that de-
veloped for Pelican Bay. It consists of a system of shallow
intt:rconnected detention areas formed by the difference in
elevation between nateral ground and the proposed pavement.
Runoff will be storee .n the detention areas which are inter-
connected by culverts and will eventually be discharged into
the detention area upstream of the system II berm in Pelican
Bay. The runoff will then become part of the water management
system of Pelican Bay in which it will be discharged through
control weirs to the wetlands via a spreader swale.
1
{
1 •
`�pLt�!NCA�_ 1 DRP(NAGE
•�.:��Z� SYSTEM 1t;rs ..�.��',
'1 1t 1, V i r....- S4"'':.')':
w.i 1
'� 1% % D1 AINAGE �•
e !��',, f ,
1' t..../ / 1/ .(3) S i EM . .'a '°''r
•
1 1.4
t, . ,;a,, J ., oP�Y,,,, `r'.-,, ?,,,,•A t � FLOC
1
Feu.
�` " f: e
• 1 y •f'" y�%'' �. 8�w\
\ GRA INAGE
u �1 SYSTEM a,.. ;:` 't•.,•y� •,
7C I. I I ( ILE'�f
i'/I .,f 4,....., !:,
i 1 \ 1% • ' t i'•.
' r DRAINAGE ;;,..?1114-
-- itia °',
u SYSTEM V ,'�
-N- 0 1 PEUC
I MINI'TY? f1 !Alkl{
�I\ l.) ,. LOCATlO
k••• DRAINAt sc �at �a , ,
) \
t SYSTE IIR k .
, 11 1 ; ) I
� _.
. .R... .-rrsEA� DviovEYe
AS, 1S,--
WATER MANAGEMENT ADVISORY _BOARD
I4ffl,Ifl( 01-
DECEMBER
FDECEMBER 12, 1979
I. NAME OF PETITIONER/PROJECT:
Daniel W. Brundage, P. E. of Hole, Montes and Associates Inc.
on behalf of Pelican Bay
I I. LOCAT I ON:
See attached location ,ketch and Pelican Bay Park application
III. PROJECT DESCRIPTION:
Pelican Bay Amenity Pod Park is a ten acre parcel planned as a
central ntables,randion area an elevatedch boardwalks space for court
games, picnic
IV. STAFF COMMENTS:
The site drainage plan and supporting calculations have been reviewed
by the County Engineer and the WMAB Consultant, and they find them
to be in compliance with the County Water Management Criteria. The
discharge from Pelican Bay Park will become a part of Pelican Bay
Water Mthedifference to
gdiffereneent ebetween predevelopmentdetentionm which provides and postdevelopmenttfor
retain
a 25 year, 24 hour storm.
V. RECOMMENDATIONS:
The staff recommends approval
Modification of Permit No. 11-00065-S
Pelican Bay Amenity Pod Park - Collier County
STAFF REPORT
ABSTRACT
A request has been made to modify Penult No. 11-00065-S to allow for the construction
and operation of a 4.6 acre park known as the Pelican Bay Amenity Pod Park. The
-:taff recommends approval of this modification.
THE APPLICATION
The application is for the construction and operation of a surface water management
system consisting of a 1.3 acre detention area system that is interconnected by
culverts. A 19" x 30" RCPu: 30 LF will connect the park detention area to detention
area 4 of System II of the Pelican Bay drainage system.
EVALUATION
the applicant proposes to construct a building, roadway, parking area, and tennis courts.
The park is included in the drainage area of Pelican Bay System II and proposed
development will not adversely impact the system.
RECOMMENDATIONS
The staff recommends that Permit No. 11-00065-S be modified to allow construction and
operation of the surface water management system as described.
}{‘ CottP'r111i1lY
•
Board Approval i
Page 1 of 1
C-;C.?C)C..)C_)C) .5 w
ISA P c.ES
u 5 v . 6 t.f i 4 .a€w
Pi i./ IJr ,i +
�1j } IS I r: (.3thr (iti3:!f ;.{l)! ;I+1 i„:tuo 4i,.,;+
t3 V,c,,.1('71!11'?t}:?:11.1'itu'i[l;t
it ICtinuIIt. •(Itli�)1181:£1:'O:1
£I:III.1%W.\I L,IIC 1400-13;?-;21)
3,1 ,3i , VIM: Permit (MOD) No. 11-00065-S
January 10, 1980
Pelican Iay Improvement District
Collier County Courthouse
Naples, Florida 33940
Gentlemen:
Permit modification approved by the Govevoing Board of this District is as
follows:
TO INCLUDE: THE CONSTRUCTION AND OPERATION OF PELICAN BAY AMENITY POD
PARK, CONSISTING OF 4.6 ACRES. DRAINAGE FACILITIES INCLUDE
A DETENTION AREA, CULVERTS AND 1-1911 RCP.
Please update yo,/r records by attaching this letter and staff report to
your permit.
District permit modification does not relieve you of the responsibility of
obt fining authority from federal , state and local agencies.
Sincerely,
Charles A. Hall, Director
Surface Water Management Division
Resource Control Department
CAH/sw •
Enclosure: (1)
cc: DER
Stanley W. Hole & Associates, Inc.
Fred Vidzes
Inspection - Collier County, 54,5,8,9/T49S/R25C
S32`33/T48S/R25E
POSTED
Permit Number Book?
Inventory Book
.eCanal Quadrangles 074:4-II
Date / • t3
Signed
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,► ;'� South Florida Water Management District
0, / Fort Myers Service Center •2301 McGregor Boulevard•Fort Myers,FL 33901
(941)338-2929•Fax(941)338-2936. 1-800-248-1201 •Suncom 748-2929
CON 24-06
Regulation Department
Application No.: 980717-16
August 27, 1998
WCI Communities Limited Partnership
24301 Walden Center
Bonita Springs, FL 34134
Dear Permittee:
SUBJECT: PERMIT MODIFICATION NO.: 11-00065-S
Project: PELICAN BAY COMMONS
Location: Collier County, S32/T48S/R25E
District staff has reviewed the information submitted on July 17, 1998, for an
approximately 4800 SF building addition and repaving of a brick paver area as
shown on plan sheet 2 of 2 by Kepple Engineering, signed and sealed by
Terrance L. Kepple, P.E. , on August 19, 1998. No other changes to the Surface
Water Management System were proposed or authorized by this modification.
Based on that information, District staff has determined that the proposed
activities are in compliance with the original surface water management permit
and appropriate provisions of FAC Rule 40E-4.331(2)(b). Therefore, these
changes have been recorded in our files. Please understand that your permit
remains subject to the Standard Limiting Conditions and all other Special
Conditions not modified and as originally issued.
Sincerely,
�rizc.d 7At,/7,14r4
Richard H. Thompson, P.E.
Sr Supv Engineer
Ft Myers Service Center
RT/rt
c: Collier County Engineer
KEPPLE ENGINEERING
Governing Board.
Frank Williamson,Jr.,Chairman Vera M.Carter Richard A.Machek Samuel E.Poole III,Executive Director
Eugene K Pettis,Vice Chairman William E.Graham Michael D.Minton Michael Slayton,Deputy Executive Director
Mitchell W.Berger William Hammond Miriam Singer
District Headquarters•3301 Gun Club Road,P.O.Boot 24680,West Palm Beach,FL 33416-4680•(407)686-8800,FL WATS 1-800-432-2045
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°c`��► South Florida Water Management District
111111q2Fort Myers Service Center •2301 McGregor Boulevard•Fort Myers,FL 33901
(941)338-2929•Fax(941)338-2936• 1-800-248-1201 •Suncom 748-2929
CON 24-06
Regulation Department
Application No.: 981221-14
January 28, 1999
W.J. Johnson & Associates, Inc.
1876 Trade Center Way
Suite C
Naples, FL 34109-1864
Dear Permittee:
SUBJECT: PERMIT MODIFICATION NO.: 11-00065-S
Project: PELICAN BAY COMMONS
Location: Collier County, S32/T48S/R25E
District staff has reviewed the information submitted on December 21, 1998,
for the relocation of the dumpster pad as shown on sheet 1 of 1 by W.J.
Johnson & Associates, Inc. , signed and sealed by William J. Johnson on January
13, 1999. No other changes to the surface water management system are
authorized by this modification. Based on that information, District staff
has determined that the proposed activities are in compliance with the
original surface water management permit and appropriate provisions of FAC
Rule 40E-4.331(2)(b) . Therefore, these changes have been recorded in our
files. Please understand that your permit remains subject to the Standard
Limiting Conditions and all other Special Conditions not modified and as
originally issued.
Sincerely,
,c4,22
Richar. ' . ompson, P.E.
Sr Supv Engineer
Ft Myers Service Center
RT/rt
c: Collier County Engineer
W.J. JOHNSON & ASSOCIATES, INC.
Governing Board:
Frank Williamson,Jr.,Chairman Vera M.Carter Richard A Machek Samuel E.Poole III,Executive Director
Eugene K.Pettis,Vice Chairman William E.Graham Michael D.Minton Michael Slayton,Deputy Executive Director
Mitchell W.Berger William Hammond Miriam Singer
DistrictHeadauarterc•3101 Gun Club Road.P.O.Box 24680 West Palm Beach.FL 33416-4680.(407)686-8800.FL WATS 1-800-432-2045
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ENGINEERS•PLANNERS•SURVEYORS
950 Encore Way• Naples,Florida 34110•Phone:239.254.2000•Fax:239.254.2099
February 27,2003
Ms. Christine Willoughby SDPI-2003-AR-3604 REV 2
Collier County Development Services Project: 19990549
2800 N.Horseshoe Drive DATE: 02/28/03
Naples,FL 34104
Re: Pelican Bay Commons
SDPI-AR-3604
HM File No.2002113
Dear Ms.Willoughby:
This letter is in response to County comments fax dated January 24,2003. Per discussions with
County Staff, we revised the construction drawing to depict "Phase 1" and "Phase 2"
construction. At this time, request approval to construct only Phase 1. Some of the
environmental comments below will be addressed as part of Phase 2 approval. The remaining
comments are addressed below.
Engineering Water Management—Steve Seal
1. How is additional water quality being handled? Does SFWMD still require letter mods
within Pelican Bay?
Response: Per voice message from Stan Chrzanowski no further review from County
Engineering is required. A letter mod from SFWMD will be forthcoming and no water quality
treatment is required.
)environmental Planning—Laura Rovs
1. Clearing plan revised accordingly(3.9.4.2.1 &3.9.4.2.2)
Submit a vegetation inventory using FLUCFCS codes for all areas of vegetation within
50' of construction. Mark/label trees and other protected vegetation that will be
removed.
Response: To be addressed in Phase 2 approval.
2, Note on plan indicating methods of barricading to be used to protect vegetation to remain
(3.9.5.1.5 LDC).
W:12002\2002113\OHH'CW030124 response conunen s.doc
Naples•Fort Myers•Venice•Englewood
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MTS 0141/03
Pelican Bay Services
Municipal Services Taxing Unit
Balance Sheet-June 30, 2014
Operating Fund 109- FY 2014
(Unaudited)
Assets
Current Assets
Cash and Investments 1,592,527.65
Interest Receivable -
Improvements,Vehicles & Equipment 890,214.03
Due from Property Appraiser -
Due from Tax Collector -
Total Current Assets $ 2,482,741.68
Total Assets $ 2,482,741.68
Liabilities and Fund Balance
Current Liabilities
Accounts/Trade Payable $ 30,363.08
Accrued Wages Payable -
Goods Received/Inventory Recv'd 24,448.33
Total Liabilities $ 54,811.41
Fund Balance
Fund Balance- unreserved 925,067.65
Excess Revenues (Expenditures) 1,502,862.62
Total Fund Balance 2,427,930.27
Total Liabilities and Fund Balance $ 2,482,741.68
Fertilizer and Herbicides 89,400.00 64,600.00 38,159.30 26,440.70
Other Repairs and Maintenance 1,500.00 1,100.00 1,350.07 (250.07)
Other Operating Supplies and Equipment 2,500.00 1,900.00 3,122.76 (1,222.76)
Total Water Management Field Operating $ 442,800.00 $ 316,400.00 $ 296,583.14 $ 19,816.86
Right of Way Beautification-Operating
Payroll Expense $ 47,900.00 $ 36,800.00 $ 34,724.57 $ 2,075.43
Emergency Repairs and Maintenance 7,400.00 - - -
IT Direct Capital 200.00 200.00 150.00 50.00
Office Automation 9,700.00 7,300.00 7,275.00 25.00
Other Contractural Services 45,100.00 33,800.00 31,786.88 2,013.12
Telephone 3,600.00 2,700.00 1,952.00 748.00
Postage 2,200.00 200.00 21.56 178.44
Rent Buildings/Equipment/Storage 12,200.00 9,200.00 9,183.42 16.58
Insurance-General 500.00 375.00 375.00 -
Printing,Binding and Copying 2,600.00 200.00 - 200.00
Clerk's Recording 1,500.00 100.00 - 100.00
Legal Advertising 1,500.00 300.00 222.09 77.91
Office Supplies General 2,700.00 2,000.00 828.80 1,171.20
Training and Education(Tuition Reimb.) 1,500.00 1,100.00 1,936.74 (836.74)
Total Right of Way Beautification Operating $ 138,600.00 $ 94,275.00 $ 88,456.06 $ 5,818.94
Right of Way Beautification-Field
Payroll Expense $ 809,600.00 $ 622,800.00 $ 562,768.77 $ 60,031.23
Emergency Maintenance and Repairs 3,300.00 - - -
Flood Control(Water Use&Swale/Berm Mntc.) 89,900.00 68,700.00 70,042.46 (1,342.46)
Pest Control 10,000.00 3,300.00 - 3,300.00
Landscape Incidentals 2,500.00 1,900.00 1,948.09 (48.09)
Other Contractural Services 29,500.00 23,100.00 21,000.00 2,100.00
Temporary Labor 201,400.00 166,500.00 156,530.32 9,969.68
Telephone 3,200.00 2,400.00 1,989.41 410.59
Electricity 3,400.00 2,600.00 1,373.09 1,226.91
Trash and Garbage 17,000.00 8,500.00 8,710.47 (210.47)
Rent Equipment 2,500.00 2,500.00 3,191.86 (691.86)
Motor Pool Rental Charge 100.00 100.00 247.50 (147.50)
Insurance-General 8,900.00 6,700.00 6,675.00 25.00
Insurance-Auto 10,000.00 7,500.00 7,500.00 -
Building Repairs and Maintenance 1,700.00 400.00 302.87 97.13
Fleet Maintenance and Parts 20,900.00 15,700.00 21,662.62 (5,962.62)
Fuel and Lubricants 55,500.00 37,100.00 34,256.32 2,843.68
Licenses,Permits,Training 800.00 100.00 - 100.00
Tree Triming 96,400.00 72,300.00 59,356.00 12,944.00
Clothing and Uniforms 9,400.00 5,500.00 5,184.66 315.34
Personal Safety Equipment 3,000.00 3,000.00 3,000.00 -
Fertilizer and Herbicides 62,000.00 49,700.00 49,897.08 (197.08)
Landscape Maintenance 46,000.00 40,800.00 38,723.40 2,076.60
Mulch/Landscape Materials 52,000.00 46,600.00 51,819.20 (5,219.20)
Pathway Repairs 6,000.00 - - -
Sprinkler Maintenance 30,000.00 20,500.00 21,205.53 (705.53)
Painting Supplies 800.00 300.00 115.10 184.90
Traffic Signs 3,000.00 2,000.00 1,322.50 677.50
Minor Operating Equipment 3,700.00 2,800.00 2,722.33 77.67
Other Operating Supplies 9,000.00 6,800.00 12,290.03 (5,490.03)
Total Right of Way Beautification-Field Operating $ 1,591,500.00 $ 1,220,200.00 $ 1,143,834.61 $ 76,365.39
Total Operating Expenditures $ 2,391,300.00 $ 1,805,300.00 $ 1,700,484.77 $ 104,815.23
Page 2 of 3
Pelican Bay Services
Municipal Services Taxing Unit
Income Statement w/Budget-June 30,2014
Operating Fund 109-FY 2014
(Unaudited)
Annual YTD YTD
Budget Budget Actual Variance
Operating Revenues:
Carryforward $ 796,800.00 $ 796,800.00 $ 796,800.00 $
Special Assessment-Water Management Admin 742,500.00 710,572.50 710,844.64 272.14
Special Assessment-Right of Way Beautification 1,947,100.00 1,863,374.70 1,865,046.21 1,671.51
Plan Review Fees 1,500.00 ---
-
-
310.00 310.00
Miscellaneous _ -
Revenue Reserve (135,300.00)
Interest 15,200.00 10,133.33 4,360.31 (5,773.02)
Total Operating Revenues $ 3,367,800.00 $ 3,380,880.53 $ 3,377,361.16 $ (3,519.37)
Operating Expenditures:
Water Management Administration
Payroll Expense $ 46,500.00 $ 35,800.00 $ 33,703.39 $ 2,096.61
Emergency Maintenace and Repairs 8,800.00 -
-
IT Direct Capital 200.00 150.00 150.00
IT Office Automation/Billing Hr. 4,500.00 3,375.00 3,375.00
Indirect Cost Reimbursement 80,300.00 80,300.00 80,300.00
Inter Payment/Mnt.Site Ins. Assessment 15,900.00 11,900.00 11,925.00 (25.00)
Other Contractural Services 37,500.00 28,100.00 27,972.00 128.00
Telephone 3,600.00 2,700.00 2,058.50 641.50
Postage and Freight
1,700.00 100.00 26.90 73.10
Rent Buildings and Equipment 11,000.00 8,300.00 8,500.87 (200.87)
Insurance-General 900.00 700.00 675.00 25.00
Printing,Binding and Copying 1,800.00 -
-
Clerk's Recording Fees 1,200.00
-
Legal Advertising 1,200.00 400.00 142.52 257.48
Other Office and Operating Supplies 2,200.00 1,500.00 942.90 557.10
Training and Education(Tuition Reimb.) 1,100.00 1,100.00 1,838.88 (738.88)
Total Water Management Admin Operating $ 218,400.00 $ 174,425.00 $ 171,610.96 $ 2,814.04
Water Management Field Operations
Payroll Expense $ 141,600.00 $ 108,900.00 $ 102,923.95 $ 5,976.05
Engineering Fees 32,500.00 16,300.00 14,212.00 2,088.00
Flood Control Berm and Swale Mntc. 18,000.00 18,000.00 31,935.00 (13,935.00)
Landscape Materials/Replanting Program 8,500.00 1,400.00 601.88 798.12
Interdepartmental Payment(Water Quality Lab) 29,100.00 24,300.00 25,973.00 (1,673.00)
Plan Review Charges 1,500.00 - -
Other Contractural Services
1,000.00 300.00 - 300.00
Temporary Labor 44,900.00 38,700.00 39,230.80 (530.80)
Cell Phones 500.00 400.00 424.25 (24.25)
Trash and Garbage 5,700.00 3,900.00 3,928.00 (28.00)
Motor Pool Rental Charge 200.00 100.00 95.06 4.94
Insurance-General 2,400.00 1,800.00 1,800.00
Insurance-Auto 900.00 675.00 675.00
Building Repairs&Mntc. 1,700.00 425.00 401.39 23.61
Fleet Maintenance and Parts 3,900.00 3,600.00 5,592.22 (1,992.22)
Fuel and Lubricants 3,400.00 2,600.00 1,943.11 656.89
52,000.00 26,000.00 20,918.00 5,082.00
Clothing
Tree 1,100.00 900.00 797.35 102.65
and Uniforms
Personal Safety Equipment 500.00 500.00 2,500.00 (2,000.00)
Page 1 of 3
Capital Expenditures:
Water Management Field Operations $
Other Machinery and Equipment $ 1,000.00 $ - $
General 11,300.00 $ 2,825.00 2,499.00 326.00
Total Water Management Field Operations Capital $ 12,300.00 $ 2,825.00 $ 2,499.00 $ 326.00
Right of Way Beautification-Field $ $
Autos and Trucks $ - $
Other Machinery and Equipment 4,200.00 840.00 695.00 145.00
Total Right of Way Beautification-Field Capital $
4,200.00 $ 840.00 $ 695.00 $ 145.00
Total Capital Expenditures
$ 16,500.00 $ 3,665.00 $ 3,194.00 $ 471.00
Total Operating Expenditures $ 2,407,800.00 $ 1,808,965.00 $ 1,703,678.77 $ 105,286.23
Non-Operating Expenditures:
Transfer to Fund 322 $ 210,000.00 $ 157,500.00 $ 157,500.00 $
Tax Collector Fees 82,700.00 53,755.00 51,510.01 2,244.99
Property Appraiser Fees 72,700.00 43,620.00 43,368.59 251.41
Reserves(2 1/2 months for Operations) 479,000.00
-
Reserves for Equipment 132,300.00 - -
Reserved for Attrition (16,700.00) -
Total Non-Operating Expenditures $ 960,000.00 $ 254,875.00 $ 252,378.60 $ 2,496.40
Total Expenditures $ 3,367,800.00 $ 2,063,840.00 $ 1,956,057.37 $ 107,782.63
Net Profit/(Loss) $ - $ 1,317,040.53 $ 1,421,303.79 $ 104,263.26
Page 3 of 3
Pelican Bay Services
Municipal Services Taxing Unit
Balance Sheet-June 30,2014
Street Lighting Fund 778-FY 2014
(Unaudited)
Assets
Current Assets
Cash and Investments $ 882,946.56
Interest Receivable -
Improvements,Vehicles & Equipment 41,719.14
Due from Tax Collector -
Total Current Assets $ 924,665.70
Total Assets $ 924,665.70
Liabilities and Fund Balance
Current Liabilities
Accounts/Trade Payable $ 987.34
Goods Received/Inventory Recv'd 3,000.00
Accrued Wages Payable -
Total Liabilities $ 3,987.34
Fund Balance
Fund Balance- unreserved 628,597.68
Excess Revenue (Expenditures) 292,080.68
Total Fund Balance 920,678.36
Total Liabilities and Fund Balance $ 924,665.70
,t Bulb Ballast 13,100.00 9,700.00 7,944.63 1,755.37
Total Street Lighting Field Operating 142,200.00 97,865.00 87,796.14 10,068.86
Total Street Lighting Expenditures 249,500.00 179,465.00 167,593.03 11,871.97
Capital Expenditures:
Street Lighting Field Operations
Other Machinery/Equipment 1,000.00 1,000.00 1,000.00 -
General Improvements -
-
Total Capital Expenditures 1,000.00 1,000.00 1,000.00 -
Total Operating Expenditures 250,500.00 180,465.00 168,593.03 11,871.97
Non-Operating Expenditures:
Tax Collector Fees 13,500.00 8,775.00 8,560.66 214.34
Property Appraiser Fees
8,900.00 89.00 - 89.00
Reserve for Future Construction 675,100.00 - -
Reserves (2 1/2 mos.for Operations) 54,500.00 - -
Reserves for Equipment 35,000.00 - -
Total Non-Operating Expenditures 787,000.00 8,864.00 8,560.66 303.34
1utal Expenditures 1,037,500.00 189,329.00 177,153.69 12,175.31
Net Profit/(Loss) - 849,044.00 856,825.79 7,781.79
Page 2 of 2
Pelican Bay Services
Municipal Services Taxing Unit
Balance Sheet-June 30, 2014
Clam Bay Fund 320- FY 2014
(Unaudited)
Assets
Current Assets
Cash and Investments $ 156,777.83
Interest Receivable -
Improvements,Vehicles & Equipment 267,525.20
Due from Tax Collector
-
Total Current Assets 424,303.03
Total Assets $ 424,303.03
Liabilities and Fund Balance
Current Liabilities
Accounts/Trade Payable $ -
Goods Received/Inventory Recv'd 19,980.00
Accrued Wages Payable
-
Total Liabilities 19,980.00
Fund Balance
Fund Balance-unreserved 119,520.33
Excess Revenues (Expenditures) 284,802.70
Total Fund Balance 404,323.03
Total Liabilities and Fund Balance $ 424,303.03
Pelican Bay Services
Municipal Services Taxing Unit
Income Statement w/Budget-June 30, 2014
Street Lighting Fund 778-FY 2014
(Unaudited)
Annual YTD YTD
Budget Budget Actual Variance
Operating Revenues:
Carryforward $ 605,800.00 $ 605,800.00 $ 605,800.00 $ -
Curent Ad Valorem Tax
445,500.00 425,898.00 425,981.43 $ 83.43
Transfer from Tax Collector -
-
Revenue Reserve $ (22,700.00)
Interest 8,900.00 6,675.00 2,198.05 $ (4,476.95)
Total Operating Revenues 1,037,500.00 1,038,373.00 1,033,979.48 (4,393.52)
Operating Expenditures:
Street Lighting Administration
Payroll Expense $ 46,600.00 $ 35,800.00 $ 33,778.24 $ 2,021.76
Indirect Cost Reimbursement
6,400.00 $ 6,400.00 6,200.00 $ 200.00
fl~her Contractural Services 34,700.00 $ 26,000.00 26,705.12 $ (705.12)
.phone 3,600.00 $ 2,700.00 1,637.17 $ 1,062.83
2,000.00 $ 200.00 21.55 $ 178.45
Postage and Freight 23.19
Rent Buildings/Equipment/Storage 11,800.00 $ 8,900.00 8,923.19 $ (23.19)
Insurance-General 400.00 $ 300.00 300.00 $
Office Supplies General 800.00 $ 500.00 253.74 $ 246.26
Tuition Reimbursement
$ - 1,694.88 $ (1,694.88)
Other Office and Operating Supplies 1,000.00 $ 800.00 283.00 $ 517.00
Total Street Lighting Admin Operating 107,300.00 81,600.00 79,796.89 1,803.11
Street Lighting Field Operations
Payroll Expense 67,000.00 51,500.00 51,156.59 343.41
Emergency Maintenance & Repairs 9,600.00 200.00 107.95 92.05
Other Contractual Services
800.00 100.00 - 100.00
Telephone
500.00 400.00 288.32 111.68
Electricity
35,000.00 26,300.00 21,628.45 4,671.55
_
Insurance-General 900.00 675.00 675.00
Insurance-Auto 1,000.00 750.00 750.00 -
Building Maintenace & Repairs 1,700.00 340.00 185.54 154.46
Fleet Maintenance and Parts 3,700.00 2,800.00 942.16 1,857.84
Fuel and Lubricants 900.00 700.00 489.43 210.57
( her Equipment Repairs/Supplies 200.00 200.00 91.42 108.58
conal Safety Equipment 500.00 500.00 500.00 -
Electrical Contractors 7,300.00 3,700.00 3,036.65 663.35
Page 1 of 2
Pelican Bay Services
Municipal Services Taxing Unit
Income Statement w/Budget-June 30, 2014
Clam Bay Fund 320-FY 2014
(Unaudited)
Annual YTD YTD
Budget Budget Actual Variance
Operating Revenues:
Carry Forward $ 106,153.25 $ 106,153.25 $ 106,153.25 $ -
Special Assessment
133,200.00 127,500.00 127,598.13 98.13
_
Transfer from Tax Collector
Fund 111 32,300.00 32,300.00 32,300.00 -
Revenue Reserve (6,700.00) -
Interest
800.00 600.00 559.15 (40.85)
Total Operating Revenues $
265,753.25 $ 266,553.25 $ 266,610.53 $ 57.28
Operating Expenditures:
Clam Bay Restoration 839.62
Engineering Fees $ 125,245.00 $ 52,125.00 $ 51,285.38 $
Other Contractural Services
38,758.07 $ 38,758.07 56,825.80 (18,067.73)
" Trimming
55,560.00 37,000.00 22,464.00 14,536.00
� _
tJLner Equipment Repairs 1,077.77 -
15,550.20 5,800.00 5,761.60 38.40
Aerial Photography
Minor Operating 4,388.01 - -
-
Other Operating Supplies 1,500.00 -
Total Clam Bay Restoration $
242,079.05 242,079.05 $ 136,336.78 $ (2,653.71)
Clam Bay Ecosystem $ $
Engineering Fees $ - - - -
Licenses and Permits _
Other Contractual Services 2,074.20 2,074.20 2,074.20
Total Clam Bay Ecosystem $ 2,074.20 $ 2,074.20 $ 2,074.20 $ -
Capital Expenditures:
Clam Bay Restoration $
Other Machinery and Equipment $ 11,000.00 $ - $ -
Total Capital Expenditures $ 11,000.00 $ - $ - $
-
Total Clam Bay Operating Expenditures $ 255,153.25 $ 244,153.25 $ 138,410.98 $
(2,653.71)
Page 1 of 2
,i-Operating Expenditures:
Tax Collector Fees $ 4,100.00 $ 2,665.00 $ 2,551.58 $ 113.42
Property Appraiser Fees 2,700.00 2,025.00 1,996.70 28.30
Reserves for Operations 3,800.00 - - -
Total Non-Operating Expenditures $ 10,600.00 $ 4,690.00 $ 4,548.28 $ 141.72
Total Expenditures $ 265,753.25 $ 248,843.25 $ 142,959.26 $ (2,511.99)
Net Profit/(Loss) $ - $ 17,710.00 $ 123,651.27 $ (2,454.71)
Page 2 of 2
Pelican Bay Services
Municipal Services Taxing Unit
Balance Sheet-June 30,2014
Capital Projects Fund 322- FY 2014
(Unaudited)
Assets
Current Assets
Cash and Investments $ 2,240,724.55
Interest Receivable -
Improvements,Vehicles & Equipment 1,223,041.96
Due from Tax Collector -
Total Current Assets 3,463,766.51
Total Assets $ 3,463,766.51
Liabilities and Fund Balance
Current Liabilities
Accounts/Trade Payable $ 228.04
Goods Received Inv. Received 11,940.95
Total Liabilities 12,168.99
Fund Balance
Fund Balance- unreserved 2,710,861.45
Excess Revenues (Expenditures) 740,736.07
Total Fund Balance 3,451,597.52
Total Liabilities and Fund Balance $ 3,463,766.51
Pelican Bay Services
Municipal Services Taxing Unit
Income Statement w/Budget-June 30, 2014
Capital Projects Fund 322-FY 2014
(Unaudited)
Annual YTD YTD
Budget Budget Actual Variance
Operating Revenues:
Carry Forward $ 2,696,954.86 $ 2,696,954.86 $ 2,696,954.86 $ -
Transfer from Fund 109 General 210,000.00 157,500.00 157,500.00 -
Foundation Payment for Crosswalks - - - -
Special Assessment 209,100.00 201,781.50 202,580.24 798.74
Transfer from Tax Collector - - - -
Interest 25,800.00 17,200.00 8,006.93 (9,193.07)
Total Operating Revenues $ 3,141,854.86 $ 3,073,436.36 $3,065,042.03 $ (8,394.33)
Operating Expenditures:
Irrigation& Landscaping
Hardscape Project(50066)
F^gineering Fees $ 87,715.82 $ 17,543.16 $ 15,085.00 $ 2,458.16
,er Contractural Services 1,887,308.54 * 773,796.50 763,030.42 10,766.08
Sprinkler System Repairs - - 846.98 (846.98)
Landscape Materials - - 1,200.00 (1,200.00)
Permits - - -
Electrical - - 313.65 (313.65)
Other Operating Supplies (Pavers) 13,340.50 13,340.50 13,586.25 (245.75)
Traffic Sign Restoration Project(50103)
Traffic Signs 63,590.00 6,359.00 5,330.00 1,029.00
Lake Aeration (50108)
Improvements 128,500.00 3,855.00 3,524.23 330.77
North Berm Restoration (50107)
Other Contractural Services 828,900.00 * 82,890.00 29,951.53 52,938.47
Lake Bank Project(51026)
Swale &Slope Maintenance 69,177.01 691.77 128.77 563.00
Engineering Fees 500.00 - - -
Landscape Materials 3,308.20 - - -
Other Contractural Services 37,014.79 - - -
Total Irrigation & Landscaping Expenditures $ 3,119,354.86 $ 898,475.94 $ 832,996.83 $ 65,479.11
*$500,000 transferred to N Berm Project
Page 1 of 2
n-Operating Expenditures:
Tax Collector Fees $ 6,500.00 $ 4,550.00 $ 4,051.00 $ 499.00
Property Appraiser Fees 4,300.00 3,225.00 3,138.33 86.67
Reserve for Contingencies - - - -
Revenue Reserve 11,700.00 - - -
Total Non-Operating Expenditures: $ 22,500.00 $ 7,775.00 $ 7,189.33 $ 585.67
Total Expenditures $ 3,141,854.86 $ 906,250.94 $ 840,186.16 $ 66,064.78
Net Profit/(Loss) $ - $ 2,167,185.42 $2,224,855.87 $ 57,670.45
Page 2 of 2
TECHNICAL MEMORANDUM CH2MHILL®
Pelican Bay Stormwater Lakes Water Quality Monitoring
Program: May 2014 Data Review
PREPARED FOR: Pelican Bay Services Division
PREPARED BY: CH2M HILL
DATE: June 18,2014
PROJECT NUMBER: 481878.03.31.04
Introduction
Pelican Bay, a 2,300-acre community in Naples, Florida, is adjacent to a 570-acre mangrove preserve area
known as Clam Bay.A stormwater management system that consists of 63 stormwater lakes and associated
conveyance connections is an integral part of the development, and is designed to attenuate increased
runoff generated by the development.The Pelican Bay Stormwater Lakes are distributed among six drainage
basins which ultimately deliver stormwater runoff to the west to Clam Bay(Figure 1).The Pelican Bay
Services Division (PBSD)is conducting quarterly surface water quality monitoring of 45 of the 63 stormwater
lakes.This technical memorandum summarizes the stormwater lake water quality data collected for PBSD
by CH2M HILL during the May 2014 monitoring event, and compares these data to historical water quality
data gathered since November 2011.
Appendix A presents the water quality results for all of the parameters analyzed in May 2014.Appendix B
provides the May 2014 laboratory reports.Appendix C contains the field measurements for this sampling
event.
Summary of May 2014 Water Quality Data
On May 13 and 14, 2014, CH2M HILL conducted sampling of the 45 monitoring stations shown in Figure 1.
Surface water grab samples were collected and submitted to Spectrum Analytical, Inc. laboratory for
analysis of the following parameters:
• Nitrate-Nitrite
• Ammonia
• Total Kjeldahl Nitrogen (TKN)
• Ortho Phosphate
• Total Phosphorus(TP)
• Total Suspended Solids(TSS)
• Hardness
• Arsenic
• Copper
• Zinc
After collection of the surface water quality grab samples,field measures for the following parameters were
recorded along with general observations regarding conditions during the sampling efforts:
• Temperature
• Conductivity
• Dissolved Oxygen (DO)
• pH
PBSD TASK 2A-TECHMEMO MAY2014.DOC 1
FIGURE 1
Locations of Pelican Bay Stormwater Lake Basins and Monitoring Stations in Relation to Clam Bay
Pelican Bay Storm water Lakes Water Quality Monitoring Program:May 2014 Data Review
.",ti
' '; •,,,tom�-
CA:4'S ,rti`C `- i +a****114110 ...i," kx /4.1x1'I . lir.„, ''''t, - 1` �,
•- 'Z• .1 w.....,:—x1,»'s ayl„ f 1---..,littil,4 F"s T e •
7141-
`Mink..• 41 x ale; ` #-4,0* • a 1 _ .% a'_
BASIN 6 .�. ":,'N.,%. �,41166 """'-+ k: ' _, ��_`'
'1.%itfir y, 1' . '',y$ .k %It''' ; 4 '` w ***.s';,','4-,t4
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wo•lf BASIN '. } L «!* .x!"
61114
''', .,' r ,,,,,,,, , ....- f.i -
/' '
` xi R
UPPER r #4�s =' s 9.3-.....;:.,
CLAM
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1►,:„..41 y:::, .' 1» f.
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1
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CLAM! f � f` .to. ` = ..xa.
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k, ,. 4'' • .• 1 1 •ri'
• ,- k I • . r
.'' ,t
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k + • .n: .
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PASS ' '" I''!' .*. = '.Alt..- + ,e, '. '
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11 ,
I s4
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i .
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4ritst. IModified from Turrell,Hall and Associates Exhibit
PBSD_TASK 2A-TECHMEMO_MAY2014.DOC 2
PELICAN BAY STORMWATER LAKES WATER QUALITY MONITORING PROGRAM:MAY 2014 DATA REVIEW
Because water quality concerns regarding the potential influence of stormwater discharges from these lakes
to Clam Bay revolve mostly around nitrogen, phosphorus, and copper, evaluations presented herein were
focused on these parameters.
Nitrogen Concentrations
Nitrogen monitoring in the Pelican Bay stormwater lakes consists of analyses of several forms of nitrogen
including nitrate-nitrite, ammonia,and TKN. Because TKN represents the sum of ammonia plus organic
nitrogen (ON),the concentration of ON can be calculated by subtracting the concentration of ammonia from
TKN.Total nitrogen (TN) is defined as the sum of nitrate-nitrite,ammonia, and ON. Mean concentrations for
each drainage basin was calculated for each nitrogen species, based on the May 2014 data collected. Figure
2 presents the average TN concentration for each basin and the relative contributions of each form of
nitrogen to the basin mean.
Average TN in May 2014 in all basins ranged from 0.94 to 2.59 mg/L. Basin 4 had the highest TN average
(2.59 mg/L),while Basin 5 had the lowest average(0.94 mg/L). Figure 2 shows that on average,
approximately 90 percent of the total nitrogen is in the form of ON.The remainder of the nitrogen is on
average 6 percent nitrate-nitrogen and 4 percent ammonia.
In aquatic systems, such as the stormwater lakes at Pelican Bay, ON typically comprises a significant fraction
of the mass of wetland plants, algae, and soils.This mass contributes to the background concentration of
TN, which is typically in the form of ON and is due to decay processes in the system as well as algae uptake
of inorganic nitrogen from the water column.Typical background concentrations in stormwater systems
range from 0.6 mg/L to 1 mg/L depending on the nitrogen loading. During the May 2014 sampling event,TN
levels in nearly all of the stormwater lakes monitored were above this typical range which suggests that
nitrogen loading to these lakes is likely higher than for typical stormwater ponds.
FIGURE 2
Average Total Nitrogen Concentrations by Basin in May 2014
Pelican Bay Storm water Lakes Water Quality Monitoring Program:May 2014 Data Review
3
'
2.5 __.___--___---__------
E
-____E
c
o
to
2 — --_
L
,
f..
G1 I
0
V
c
a7
c 1 - — —
L
Z
fC
f—
IIM
Basin 1 Basin 2 Basin 3 Basin 4 Basin 5 Basin 6
ON Ammonia ■Nitrate-Nitrite
To assess the variability of the nitrogen values at the different sampling locations within each basin, box and
whisker plots(a.k.a. box plots)were developed for TN. Box plots are a graphical method for summarization
of data variability. For a data set representing all of the TN values for a given basin,the median value is
PBSD_TASK 2A-TECHMEMO_MAY2014.DOC 3
identified along with various measures of how variable the data within the basin are (maximum and
minimum values as well as the 75th and 25th percentile values). If extreme outlier values are present,they
generally are excluded from these evaluations of variability, but are shown graphically as indicated in Figure
3.Generally,the key comparison when comparing data sets using box plots is of the median values. Data
sets(in this case, basins)where the variability bars from the 25th to the 75th percentile values overlap are
typically not considered significantly different from each other.
Figure 4 compares the six Pelican Bay Stormwater Lakes basins based on the May 2014 TN data. Basin 3 had
the greatest level of variability, but Basin 4 had the highest measured sample at 4.04 mg/L TN, which was
considered an outlier. Basin 6 showed the least amount of variability; however it only contains two sample
points. Basins 1, 2,4,and 5 showed similar amounts of variability among their individual lakes. Basin 4 had
the highest median value for TN this quarter,and based on the relative variability reflected in the box plots,
it was generally higher in TN concentrations compared to the other Basins. In terms of relative contribution
of TN loadings to Clam Bay from the Pelican Bay Stormwater Lakes system,all basins appeared to have
comparably high potential contributions based on the nitrogen concentration data.Flow records are needed
to address actual pollutant loading comparisons.
FIGURE 3
Explanation of the Features of a Box and Whisker Plot
Pelican Bay Stormwater Lakes Water Quality Monitoring Program:May 2014 Data Review
. � 4*—Outlier
f---MAXIMUM
{ C
a
C
, Q3(75h Percentile)
C
O
U
MEDIAN
m
0
d a--Q1 (25th Percentile)
-f—MINIMUM
I
Sampling Location
PBSD TASK 2A-TECHMEMO_MAY2014.DOC 4
PELICAN BAY STORMWATER LAKES WATER QUALITY MONITORING PROGRAM:MAY 2014 DATA REVIEW
FIGURE 4
Variability of TN Results per Basin for May 2014 Results
Pelican Bay Storm water Lakes Water Quality Monitoring Program:May 2014 Data Review
5.0 -
Max Outlier Min Outlier
4.5 -
4.0 -
J.r3.5 -
m
E3.0 -
c
0 2.5 -
2
Z 2.0 - 1
H 1.5 -
1.0 - 1 1 I .1.
0.5 - 1
0.0 I I I I
Basin 1 Basin 2 Basin 3 Basin 4 Basin 5 Basin 6
Phosphorus Concentrations
Phosphorus monitoring in the Pelican Bay Stormwater Lakes consists of analysis of two forms of
phosphorus,orthophosphate and total phosphorus(TP). Orthophosphate represents the inorganic form of
phosphorus.Organic phosphorus is calculated as the difference between the TP and orthophosphate
concentrations. Mean concentrations for each drainage basin was calculated for each phosphorus species,
based on the May 2014 data collected. Figure 5 compares the average TP concentration for each basin and
the relative contributions of each form of phosphorus to the basin mean.
Average TP in May 2014 in each basin ranged from approximately 0.05 to 0.48 mg/L. Basin 6 had the highest
TP average(approximately 0.48 mg/L), however it is important to note that Basin 6 is comprised of only two
samples. Basins 1, 2,and 4 had the lowest average(approximately 0.06 mg/L).The stations in Basin 6,which
are located among mangroves,contained the highest average concentration of organic phosphorus,with
0.14 mg/L,and the highest average concentration of orthophosphate at 0.33 mg/L. Basin 3 contained the
next highest average concentration of orthophosphate at 0.16 mg/L. The remaining basins contained a
range of 0.002 to 0.09 mg/L orthophosphate.Orthophosphate comprised more than 50%of the phosphorus
in Basins 3 and 6, less than 50% in Basin 5,and less than 25%in Basins 2 and 4.The lakes that have higher
ratios of orthophosphate to organic phosphate can be considered to potentially reflect a more direct
influence from landscape fertilizer application practices. Higher concentrations of orthophosphate are more
conducive to producing algal blooms.
To assess the variability of the phosphorus values at the different sampling locations within each basin, box
plots were developed for TP. Figure 6 compares the six Pelican Bay Stormwater Lakes basins based on the
May 2014 TP data. Basin 6 had the greatest range of variability,with one sample as high as 0.81 mg/L, but as
mentioned previously, Basin 6 is comprised of only two samples. Basin 3 had the next greatest range of
variability, with a maximum of 0.45 mg/L. Basin 5 had the highest measured sample at 0.89 mg/L,which is
considered an outlier for that basin.The ranges of TP concentrations within the stations of these basins
PBSD TASK 2A-TECHMEMO MAY2014.DOC 5
ranged by an order of magnitude likely due to the sampling locations depths and potential for sediment
suspension. Flow records are needed to address actual pollutant loading comparisons.
FIGURE 5
Average Total Phosphorus Concentrations by Basin in May 2014
Pelican Bay Storm water Lakes Water Quality Monitoring Program:May 2014 Data Review
0.50
0.45
0.40
E 0.35
0.30
p L
s 0.25
00.20 -
a
0.15
i•° 0.10 -
0.05
0.00 —, __-
Basin 1 Basin 2 Basin 3 Basin 4 Basin 5 Basin 6
iu Organic Phosphorus ■Orthophosphate
FIGURE 6
Variability of TP Results per Basin for May 2014
Pelican Bay Storm water Lakes Water Quality Monitoring Program:May 2014 Data Review
1.00 x Max Outlier . Min Outlier
0.90 -
0.80
rn
0.70 -
- 0.60 -
2
0 0.50 -
CCA
0.40 -
o_
Ta 0.30 -
0
0.20 -
0.10 I 1
J.
0.00
Basin 1 Basin 2 Basin 3 Basin 4 Basin 5 Basin 6
Copper Concentrations
Copper monitoring in the Pelican Bay Stormwater Lakes consists of analysis of the samples for total
recoverable copper. Figure 7 presents the average copper concentrations for each basin.Average copper in
PBSD_TASK 2A-TECHMEMO_MAY2014.DOC 6
PELICAN BAY STORMWATER LAKES WATER QUALITY MONITORING PROGRAM:MAY 2014 DATA REVIEW
May 2014 for all the basins ranged between 4.0 and 67.1µg/L. Basin 3 had the highest copper average(67.1
p.g/L),while Basin 6 had the lowest average (4.0 pg/L).
FIGURE 7
Average Copper Concentrations by Basin in May 2014
Pelican Bay Storm water Lakes Water Quality Monitoring Program:May 2014 Data Review
1
80 — — —_
70
J
60
N
X50 -
0
-15
U
40
L
a)
o' 30
cc
20
[0
10
0
Basin 1 Basin 2 Basin 3 Basin 4 Basin 5 Basin 6
To assess the variability of the copper values at the different sampling locations within each basin,box plots
were developed for total recoverable copper. Figure 8 compares the six Pelican Bay Stormwater Lakes
basins based on the May 2014 copper data. Basin 3 showed the greatest level of variability with samples
that ranged between 123 and 147 µg/L. Basin 2 had the highest measured concentration, 162 p.g/L, and was
considered an outlier. Basins 2,4,and 5 showed similar relative variability. Basin 3 had the highest median
copper value this quarter with 50.8 µg/L.
The surface water quality standard for copper in the State of Florida's Class III freshwater lakes is a
calculated value and varies based on water hardness.This standard is not directly applicable to the Pelican
Bay Stormwater Lakes since they are man-made lakes designed to accomplish stormwater treatment and
runoff management. However,the calculated values are of interest in that they provide a useful set of
reference values for comparison with the monitoring results. Hardness for the May 2014 monitoring in the
Pelican Bay stormwater lakes ranged up to 287 mg/L CaCO3.Applying this value to the calculation formula
provided in Chapter 62-302, Florida Administrative Code yielded a copper reference value of 23.0µg/L.
Water quality within 25 of the 45 stormwater lakes at Pelican Bay in May 2014 reflected concentrations
which were above this reference value for copper during this survey.
Figure 9 presents an alternative summary of the May 2014 sampling results, distributing basin sites by
copper concentration ranges.Twenty one of the 44 stations had copper concentrations of 25 µg/L or less.
Approximately 66 percent of the Basin sample sites were measured in the range of13 to 75 µg/L,and 14
percent of the sample sites were measured at 75 µg/L or greater.
PBSD_TASK 2A-TECHMEMO MAY2074.DOC 7
FIGURE 8
Variability of Copper Results by Basin in May 2014
Pelican Bay Storm water Lakes Water Quality Monitoring Program:May 2014 Data Review
200 - M Max Outlier Min Outlier
180 -
, 160 -
rn
140 -
m
o_
0120 -
U
Z100 -
m
>
0 80 -
U
N
To
60 -
0
I— 40 l T
20 - 1
I 1
Basin 1 Basin 2 Basin 3 Basin 4 Basin 5 Basin 6
PBSD TASK 2A-TECHMEMO_MAY2014.DOC 8
PELICAN BAY STORMWATER LAKES WATER QUALITY MONITORING PROGRAM:MAY 2014 DATA REVIEW
FIGURE 9
Distribution of Basins by Copper Results in May 2014
Pelican Bay Storm water Lakes Water Quality Monitoring Program:May 2014 Data Review
Basin Stations with Copper Concentrations,in µg/i_
Basin Avg.
(µg/L) <12 13-25 26-50 51-75 76-100 100-150 >150
1-2 1-1 1-4
1 21.1
1-3 1-5 1-6
2-2 2-5 2-1 2-4
2 52.7 2-3
2-6
3-5 3-3 3-2 3-6 3-1
3 67.1 3-7 3-4 3-9
3-8
4-1 4-3 4-2 4-9 4-8
4-4 4-10 4-11
4 38.2 4-5
4-6
4-7
5-6 5-1 5-2 5-10
5-7 5-3 5-5
5 35.7
5-8 5-4
5-9
6-1
6 4.0
6-2
Comparison of May 2014 and Historical Monitoring Data
The historical monitoring data from November 2011 through May 2014 were compiled and analyzed to
generate basin-level means for all parameters monitored over the period of record.The means for each
basin in each quarter were used to generate time series plots for TN,TP,and total recoverable copper to
compare the basins for the entire period of record.These time series plots served as the means for
comparing the May 2014 data with the historical records since November 2011.
Historical rainfall data was obtained through South Florida Water Management District's DBHYDRO
database.The site that best approximates the location of the Pelican Bay area is BCBNAPLE,database key
LX271,with Latitude 26°13'31.3"N and Longitude 81°48'29.3"W which is located near the PBSD maintenance
facilities(Gulf Park Drive and Watergate Way).The rain gauge is managed by the Big Cypress Basin Service
Center.The rainfall records from November 1,2011 to May 31, 2014 were collected for comparison with the
collected water quality parameters.
Figure 10 presents a time series plot depicting the basin mean TN concentrations for the period of record.
Previously there was a general downward trend observed in TN during the period of record from November
2011 to August 2013. In November 2013,the mean TN values for all of the basins deviated from the prior
pattern and were higher than has been observed in recent quarters. In general,the TN values have
decreased slightly in May 2014 when compared to the November 2013 except for Basin 4 which shows a
slight increase. Basins 1, 2,3 and 4 have been observed to have TN values slightly higher to the measured
values between February 2012 and February 2013. Basin 5 continues to show similar values to the historical
PBSD TASK 2A-TECHMEMO MAY2014.DOC 9
record. Basin 6 appear to have a decreasing trend in TN when compared to the historical record. Basin 4
continues with its general trend of having the highest measured TN value compared to the remaining basins.
FIGURE 10
Basin Average Total Nitrogen Time Series for Period of Record
Pelican Bay Storm water Lakes Water Quality Monitoring Program:May 2014 Data Review
3.0 8.0
2.5 .---,
7.0
s 6.0
L14
E 2.0
5.0
5"--
a 1.5 su .. ,11- " \ f , 4.0 -S
co
/ 1x
1iii
.0 y 3.0 .
ft. `�. -i o
I° 2.0
0.5 J I II 1.0
0.0 . ii. I 1.1 1.1.,i.I�tI.l ill JI.1 I.I . .1. 1 l Iii iJI++ 1 1111 , I . ._ . 1L_. I .1i1 I I .I 0.0
Ra+nfa l l — -1 — —2 ---e.l-3 — r--4 -- r--5 6
Comparing the daily rainfall to the average TN concentration, it appears that the TN increases during the dry
season and decreasing during the wet season.Seasonal response in the TN concentration may be due to
increased dilution during wet seasons but other factors such as lawn maintenance practices or seasonal
presence of winter residents may also have an effect.
Figure 11 presents a time series depicting the basin mean TP concentrations for the period of record,from
which outliers have been removed for Basins 4,5,and 6. Historical outliers removed from this figure
included Station 4-10: May 2012 (6.53 mg/L),Station 6-1:November 2012 (1.58 mg/L), March 2013 (0.83
mg/L), and May 2014(0.81 mg/L), Stations 5-1 and 5-3: November 2013 (2.03 and 2.44 mg/L, respectively).
Basins 2, 3, and 4 show a decreasing trend over time.Although Basin 3 remains to have the highest TP
concentrations, it also shows the greatest improvement over time.All other basins show a neutral trend in
TP levels.
Comparing the annual rainfall data to TP concentration, it appears there is a slight increase in TP
concentration during the early summer periods.Overall,there are no distinct patterns related to rainfall.
Basin 3 appears to follow a trend opposite of the other basins. Lawn maintenance practices and seasonal
residents may have effect on the seasonality of TP.
PBSD_TASK 2A-TECHMEMO MAY2014.DOC 10
PELICAN BAY STORMWATER LAKES WATER QUALITY MONITORING PROGRAM:MAY 2014 DATA REVIEW
FIGURE 11
Basin Average Total Phosphorus Time Series for Period of Record
Pelican Bay Stormwater Lakes Water Quality Monitoring Program:May 2014 Data Review
0.45 2.0
0.40 7.0
0.35 41° 60
x°0.30 : '
�` ► _ �.,.t 5.0
0.25 ,A4 4°
L ,
..ar 4.0 '
-0.20
° 0.15 ... � 0 �
o
X0.10 -= r® J Ill 2.0
4
0.05 I J I
li + ..• _, 1.0
0.00 li , I ..lIJ. ,I.il11 I_ I .III l. . , iIi 111 ( � .it . IL. . i . i 0.0
1 -1\'' titi titi titi titi ti� ti� ti� ti� ti°` ��
•
Ra in fa I I —s4-1 —;r 2 -- J--3 —40—4 —v—5 - ,,--6
Figure 12 presents a time series depicting the basin mean copper concentrations for the period of record.A
decreasing trend is observed in copper during the period of record from November 2011 through May 2014.
Basins 2 and 4 have had higher levels of copper when compared to the other basins in most quarters
through March 2013.An extreme outlier value was noted in the May 2013 data for Station 4-8(12,060
µg/L);exclusion of that value from the database would result in a Basin 4 average for May 2013 of
approximately 336 p.g/L—a value much more in line with the other data trend lines for that quarter. The
outliers for Basin 2 and 4 have been removed from the figure to better reflect the majority of the collected
data.
A substantive decrease in copper concentrations was reflected by many of the water quality data values
generated since May 2013 monitoring by PBSD likely due to the discontinued use of copper sulfate for algal
control. Copper levels documented since August 2013 are greatly reduced when compared to the historical
data. Since August 2013 a continued copper levels show a neutral trend through May 2014
Copper concentrations appear to decrease during the wet season which may be attributed to increased
dilution within the ponds. Levels increased during dry periods when the pond stages are expected to be
lower and evaporative losses result in increased concentrations of copper, however seasonal observations
after the discontinued use of copper sulfate has not yet been observed.
PBSD TASK 2A-TECHMEMO MAY2014.DOC 11
FIGURE 12
Basin Average Total Recoverable Copper Time Series for Period of Record
Pelican Bay Stormwater Lakes Water Quality Monitoring Program:May 2014 Data Review
500 8.0
Discontinued
450 use of CuSO4 7.0
400 in August 2013
6.0
sa y 350 :c
cu 300 5.0
cu �t
0_ 250 4.0 •Fic
o r.4
200 3.0 >
FE
co 150
Imo., __-,
CD 100 f i~' .fir II�' 2.0
a I .,
50 I I I 11 ..�'_ !'* 1.0
I I 1 1� i ,..�r ~\.R
775 0 .a I ! ..... _ lit l i... L, I 1 i, A. �• o.o
F
�o4 <I �aJ Pte% X64 <0' `ra- Pte' r�o' < 0 #
EM Rainfall --W--1 —4-2 --or--3 —w-4 tea—5 _ 6
Observations and Recommendations
Based on the May 2014 monitoring results for recoverable copper and phosphorus,the historical patterns
observed in the six Pelican Bay Stormwater Lakes basins appear to be improving. However,the May 2014
results continue to show increased levels in nitrogen concentrations compared to the data for recent
quarters. Basins 2, 3 and 4 exhibited the highest mean TN levels. Basin 3 exhibited the highest average TP
levels for May 2014 as it has in the past, but shows the greatest improvement of all the basins.
The most notable observation this quarter was the continued lowering of the prevailing total recoverable
copper levels for the Pelican Bay Stormwater Lake Basins. Concentrations of copper appear to be greatly
reduced since August 2013, likely due to the discontinued use of copper sulfate. While some variability is
evident, most of the values recorded in May 2014 were lower than the values in February 2014. The only
stations which had higher copper concentrations in May compared to the preceding quarter were Stations
2-4,3-2, 3-6, and 5-10. The net result was that all of the basin averages for Basins 1 through 5 were lower
than those documented in February 2014. To evaluate current trends after the discontinued use of copper
sulfate,future monitoring will reveal whether these copper concentrations will continue to decrease over
time,or if seasonal effects are driving this trend.
PBSD_TASK 2A-TECHMEMO MAY2014.DOC 12
Appendix A
Analytical Results of the May 2014 Monitoring
of the Pelican Bay Stormwater Lakes
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Appendix B
Laboratory Reports of the May 2014 Monitoring
of the Pelican Bay Stormwater Lakes
Laboratory data is provided under separate cover to reduce the printable file size.
Appendix C
Field Data of the May 2014 Monitoring
of the Pelican Bay Stormwater Lakes
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McCaughtryMary
From: Joseph Chicurel [jchicurel@gmail.com]
Sent: Monday, June 16, 2014 8:20 AM
To: McCaughtryMary
Cc: ResnickLisa
Subject: Re: Water Management Responsibilities
Mary,
Please pass this along to Neil and as a one way communication to the Board.
As per Chairman Trecker's request. Susan O'Brien and I spoke to Jim Carr at the end of the 6/11/14 meeting
and he indicated that his firm's analysis indicated that the Commons Park is 44% impervious now and that the
plans call for it to be 54%impervious.
Both exceed what is allowable!!!
Thank you, Joe
On Jun 16, 2014, at 8:03 AM, McCaughtryMary<MaryMcCaughtryAcolliergov.net>wrote:
?lease see this one-way communication from Chairman Trecker—please do not reply, respond or comment in order to
avoid sunshine issues. Thank you.
Mary
From: david trecker [mailto:ditrecker(ayahoo.com]
Sent: Saturday, June 14, 2014 10:42 AM
To: McCaughtryMary
Subject: Water Management Responsibilities
Mary- Please forward the following to the other directors and Neil as a one-way communication.
Thanks, Dave
My notes from the 6/11/14 LWM Committee meeting indicate Neil was asked to have addressed the
following questions re PBSD water-management authority related to the Commons project:
- Is the Commons area within a prescribed water-drainage basin? If so, would the project result in the
impervious limit for that basin being exceeded?
- Is the Commons area on a drainage easement that is part of the PBID/PBSD master drainage
permit, as indicated in the 6/11/14 meeting?
- Have all PBID water-management rights been transferred to the PBSD, as suggested at the
6/11/14 meeting?
would urge other directors who were at the 6/11/14 meeting to pass on to Neil any key questions I
may have missed.
1
SUMMARY OF WATER-QUALITY STATUS (6/26/14)
In lakes ...
• Dissolved nitrogen levels remain high, likely due to continuing high
fertilizer and/or irrigation water run-off.
• Combination of aeration + bacteria + plantings appears best to reduce
algae buildup.
• After cessation of copper usage by the PBSD in mid-2013, most lakes
have shown, on average, lower copper levels.
• Of associations responsible for private lakes, 7 report no copper usage, 1
reports continued copper usage and 9 haven't responded to our inquiry.
Along berm ...
• Huge fluctuations in copper levels correspond to dry and rainy seasons.
In Clam Bay ...
• If outlier data are excluded, there has been little change in copper levels
in Clam Bay since the DEP measurements.
(D. Trecker Summary 6/26/2014)
AVERAGE COPPER LEVELS IN CLAM BAY, ug/L (1), (2)
2011 (6) 2012 (7) 2013 (8) 2014 (9)
Outer Clam Bay (3) 1.5 1.6 4.5 4.1
Inner Clam Bay (4) 5.8 5.7 6.8 7.6
Upper Clam Bay (5) 9.2 8.9 8.4 6.5
(1) State limit = 3.7
(2) Outliers (>22) excluded
(3) Station CB6 for 2011/2012, stations W1 and W6 for 2013/2014
(4) Station CB3 for 2011/2012, station W7 for 2013/2014
(5) Station CB1 for 2011/2012, station UCB for 2013/2014
(6) Five monthly readings
(7) Two monthly readings
(8) Twelve monthly readings
(9) Four monthly readings to date
Conclusion - There has been little change in the copper levels in Clam Bay
since the DEP measurements in 2011-12.
(D. Trecker Summary 6.26.2014)
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