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PBSD MSTBU Agenda 10/06/2025PELICAN BAY SERVICES DIVISION Municipal Services Taxing & Benefit Unit NOTICE OF PUBLIC MEETING OCTOBER 6, 2025 THE WATER MANAGEMENT COMMITTEE OF THE PELICAN BAY SERVICES DIVISION BOARD WILL MEET AT 1:30 PM ON MONDAY, OCT. 6 AT THE COMMUNITY CENTER AT PELICAN BAY, 8960 HAMMOCK OAK DRIVE, NAPLES, FLORIDA 34108. AGENDA 1. Pledge of Allegiance 2. Roll call 3. Agenda approval 4. Approval of 5/8125 Water Management Committee meeting minutes 5. Audience comments 6. Humiston & Moore recommendations for the Bay Colony dune Swale 7. Project updates 8. Adjournment *indicates possible action item ANY PERSON WISHING TO SPEAK ON AN AGENDA ITEM WILL RECEIVE UP TO THREE (3) MINUTES PER ITEM TO ADDRESS THE BOARD. THE BOARD WILL SOLICIT PUBLIC COMMENTS ON SUBJECTS NOT ON THIS AGENDA AND ANY PERSON WISHING TO SPEAK WILL RECEIVE UP TO THREE (3) MINUTES. THE BOARD ENCOURAGES YOU TO SUBMITYOUR COMMENTS IN WRITING IN ADVANCE OFTHE 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) 252-1355. 9/22/2025 2:11 PM PELICAN BAY SERVICES DIVISION WATER MANAGEMENT COMMITTEE MEETING MAY 8, 2025 The Water Management Committee of the Pelican Bay Services Division met on Thursday, May 8 at 9:30 a.m. at the Community Center at Pelican Bay, 8960 Hammock Oak Drive, Naples, Florida 34108. In attendance were: Water Management Cmte. Michael Rodburg, Chair Pelican Bay Services Division Staff Neil Dorrill, Administrator Dawn Brewer, Ops. Support Spec. II Chad Coleman, Deputy Director Darren Duprey, Supervisor — Field I Also Present Cindy Polke, PBSD Board Rick Swider Michael Weir Dave Greenfield, Supr. -Field II Karin Herrmann, Project Manager I Lisa Jacob, Project Manager II Barbara Shea, Admin. Support Spec. II Greg Stone, PBSD Board APPROVED AGENDA (AS PRESENTED) 1. Pledge of Allegiance 2. Roll call 3. Agenda approval 4. Approval of 2/25/25 Water Management & Clam Bay Committee meeting minutes 5. Audience comments 6. Pelican Bay stormwater management presentation and discussion 7. Adjournment ROLL CALL All members were present and a quorum was established. Mr. Weir motioned, Mr. Swider seconded to approve the agenda as presented. The motion carried unanimously. APPROVAL OF 2/25/2025 WATER MANAGEMENT AND CLAM BAY COMMITTEE MEETING MINUTES Pelican Bay Services Division Water Management Committee Meeting May 8, 2025 Mr. Swider motioned, Mr. Weir seconded to approve the 2/25/25 Water Management and Clam Bay Committee meeting minutes as presented. The motion carried unanimously. None PELICAN BAY STORMWATER MANAGEMENT PRESENTATION &DISCUSSION Mr. Rodburg commented that this meeting was intended as an educational forum to address issues relating to how the PBSD and other members of the community can, must, and should manage our stormwater, intended for the presidents of Pelican Bay HOA's and PB Property Managers. His opening comments included the following. • Stormwater management has become an issue in the forefront since Hurricane Ian, during which there was a great amount of flooding and property damage. • A 1996 Wilson Miller report entitled, "Pelican Bay Water Management Systems," provides a description of our water management system and how it really works. • Rainfall and irrigation water either seeps into the ground or flows by gravity into a sheet flow or a drain flow and eventually flows into the berm, which may be considered an engineering marvel. The berm is designed to protect the mangroves from excessive stormwater through a number of weirs (along the berm), set by standards, to control water flow. • This meeting's PowerPoint presentation will be made available in print form to anyone who requests it. Mr•. Coleman provided a PowerPoint presentation on Pelican Bay stormwater management which included the following. • The Pelican Bay community is divided into six drainage basins. • Drainage flows westward through the water management system towards the berm, and then towards the mangroves in Clam Bay. • A map of Pelican Bay basins showing water flow directions through a network of stormwater pipes was provided, identifying red and orange colored pipes (on the map) as the responsibility of the PBSD and green colored pipes as the responsibility of County Road Maintenance. • The PBSD does not own any property. The PBSD has drainage easements that provide access to private property to maintain adequate flow in each basin. PBSD easements were identified in yellow on a basin map. Some of the easements near the water management berm are sheet flow areas (not pipes). • Pelican Bay has 67 lakes; 47 are managed by the PBSD. • A map of control structures along the berm, and photos of a few control structures were provided. • Photos of a hand -dug channel (which assists in maintaining flow) and a sheet flow were provided. • A good rule of thumb: If water does not recede after 3 days from a regular storm event, there may be a drainage problem. Questions to be asked: Have you cleared excessive debris off the property? Are there branches and leaves clogging inlets or retention areas? Do you know where your drainage goes on your property? Have you had a professional clean all pipes and drains? Pelican Bay Services Division Water Management Committee Meeting May 8, 2025 • All condo associations/property managers should have their Site Development Plan (SDP) in their file. An original SDP can be found by contacting Collier County Growth Management at 239-252-2400. After obtaining your SDP, you may need to hire a licensed engineer to review site drainage and recommend improvements. • Associations need to maintain their own pipes and drainage regularly by hiring a licensed contractor that specializes in pipe inspection and restoration. The contractor needs Win Can type viewing and reporting capabilities in addition to a vac truck to clean and view pipes. • Associations need to maintain adequate flow to the PBSD drainage easement and make repairs to any pipes found to have issues. • If associations have questions about drainage they are encouraged to contact the PBSD at 239- 252-1355. ADDITIONAL AUDIENCE COMMENTS Mr. Ken Sidman questioned whether Hurricane Ian comprised the drainage system, possibly in hidden ways, and asked whether there is active monitoring of the system. Mr. Coleman commented that the main connectors and pipe -to -pipe connectors usually have conveyance and that we monitor the system continuously. Mr. Rodburg commented that we only perform repair/maintenance work when needed, and only in areas within our easements. He noted that the critical interface between the HOA's and the PBSD managed system is where problems develop. Mr. Rodburg commented that unfortunately we are unaware of how well property managers are maintaining their own water management systems. Mr. Rodburg commented that a bill now being proposed in the Florida legislature, if passed, would require periodic inspections of water management systems. Mr. Coleman clarified that if passed, this requirement would only apply to new construction. I -le noted that the PBSD now maintains master spreadsheets which track and document all of the work that we complete on our water management system. Mr. Sidman commented that about 30% of the high rises had flooding during Hurricanes Milton and Helene and questioned whether there is a problem with the master plan, and whether the existing water management system will be able to handle sea level rise, or is remediation required. He asked whether there has been any review of the adequacy of the master plan. Mr. Rodburg commented that our water management system is a passive gravity system and that no gravity -based system would be able to accommodate the levels of storm surge experienced during recent storms. Mr. Sidman questioned whether the slope behind the high rises has been altered by recent storms. Mr. Coleman commented that the PBF has been looking at lidar• maps to see any changes. He noted that the PBSD will continue to monitor these areas and that property managers also need to monitor any changes. Mr. Rodburg commented that the PBSD has certain limited responsibilities, and will continue to work with the community to ensure that we have a seamless approach to stormwater issues. He noted that it appears that the PB community has not been prepared for recent storm events. Ms. Cindy Polke, PBSD Board member, asked the following questions, (1) In recent years, Clam Bay has been filled with additional tons of sand, and can no longer operate to hold all of our stormwater; when will sand be dredged out of Clam Bay? (2) Is there any filtration of the water entering the Pelican Bay water management system from external sources? and (3) Can we mandate the use of organic fertilizer? Mr. Coleman responded that the lakes are the filtration system for water entering the system. Mr. Rodburg responded that a County fertilizer ordinance specifies all issues relating to fertilizer and that we would hope all of our landscapers follow this ordinance. Pelican Bay Services Division Water Management Committee Meeting May 8, 2025 Ms. Cindy Polke commented that many golf courses are lining their lakes with littoral shelves (known to be environmentally friendly) and recommended the installation of littorals in our PB lakes. Mr. Rodburg commented that littorals have been an ongoing discussion by the Water Management Committee and that we have deferred installing littorals in Oakmont Lake. He noted that littorals have pluses and minuses; minuses include difficulty to maintain and high cost. Mr. Rodburg commented that most of our golf course lakes have littorals. He suggested that a discussion of littorals is revisited by the conunittee, including obtaining input from our environmental consultants. Mr. Rodburg suggested that it is more difficult to install littorals in lakes with natural/sediment bottoms (as is the case in Pelican Bay) than in sand bottoms. Mr. Dorrill commented that about 7-10 years ago, a PBSD project included installing rip rap on the east side of the lake in Oak Lake Sanctuary, and a littoral shelf along the south side of the lake. Although the littoral plants have thrived, residents have not found them to be attractive. He noted that typically torpedo grass (an invasive species) invades the littorals, making them difficult to treat for removal. Ms. Polke commented that we need to recognize the existence of additional tons of sand in Clam Bay. Mr. Rodburg responded that this issue is off topic; however, we have 2025 plans in place for the dredging of Clam Pass and beach restoration and renourishment. Mr. Coleman commented that our template only allows us to dredge in Sections A, B, and C in Clam Pass. He noted that we are waiting on a construction plan from our coastal engineer in order to go out for bid for our dredging project, and therefore we have no firm scheduled date for the dredge. Mr. Coleman commented that our target date is the November/December timeframe, after the end of turtle nesting season. Mr. Rodburg commented that as soon as we receive approvals from the SFWMD and the Florida Fish & Wildlife Conservation Commission, a contractor will be mobilized to reclaim as much sand as possible from behind the dune. Mr. Rodburg commented that it has been a pleasure chairing this committee, and that he will continue on as chair of the Clam Bay Committee. Mr. Swider will take over as chair of the Water Management Committee. The meeting was adjourned at 10:03 a.m. Michael Rodburg, Chair Minutes approved � � as presented OR L� as amended ON [ � date 0 HUMISTON MOORE ENGINEERS fOASTAL ENGINEERING DESIGN AND PERMITTING August 13, 20205 Lisa Jacob Project Manager II Pelican Bay Services 801 Laurel Oak Dr, Ste 102 Naples, FL 34108 Regarding: Bay Colony Dune Swale Restoration Post 2024 Storms Impact Dear Lisa, 5679 STRAND COAT NAPLE 4 34110 FAX: 239 2025 59 PHONE: 239 2025 395942021 Sent via E-mail This letter provides a coastal engineering assessment of the Bay Colony dune Swale conditions and management recommendations. This assessment is provided following the restoration efforts by PBSD to restore the Swale following the impacts of Hurricanes Helene and Milton in September and October 2024 respectively. The Bay Colony dune Swale is located landward of the beach dune between Bay Colony Beach Club and the Contessa Condominium. The cumulative effects of the two major hurricanes on the beach and dune system through southwest Florida were significant. The 2024 storms impacted the dune and each system causing a significant amount of sand to be over washed landward of the dune and severely damaged the dune vegetation. Background: The Bay Colony dune Swale was constructed in the early 1980s under a permit from the US Army Corps Engineers (USACE) and South Florida Water Management (SFWMD) which was applied for by the developers of Bay Colony. This drainage Swale was constructed to allow stormwater drainage from the high-rise condominiums in Bay Colony to travel through Clam Bay and ultimately discharge into the Gulf. It is in drainage basin 6 of the Pelican Bay stormwater management system. The permit states the area is to remain in a natural vegetative condition and is not to be cleared orfilled. The Swale allows natural filtering of the water through the sand and plants before it enters Clam Bay. This system functioned normally for many years without many residents even knowing it existed. The area was originally a drainage easement of the Pelican Bay Independent District which became the Collier County Pelican Bay Services Division. PBSD does not own any land in Bay Colony or Pelican Bay and only maintains the drainage easements. In 2018, several parking lots between the condo buildings began to flood during heavy rain. Maintenance work was performed in the dune Swale to restore flow and allow stormwater drainage to alleviate flooding. When Hurricane Ian hit southwest Florida in 2022, the dune Swale flooded, and some vegetation was lost. Although much of Bay Colony flooded, the dune Swale held a vast amount of water that prevented catastrophic flooding in the area. After the hurricane, PBSD mobilized contractors to remove debris and excess sand to allow water to flow to Clam Bay unimpeded. PBSD also coordinated with the Bay Colony Page 1 of 3 Association and condos to ensure building drainage was repaired to run into the swale and not further erode the banks. After a few significant winter storms, annual maintenance was performed on the dune swale during the summer of 2024to restabilize the sand banks with a biodegradable coconut fiber mesh and biodegradable stakes. Dead horticultural debris and excess sand and silt were removed to ensure proper drainage. Restoration Post 2024 Storm Impacts: The 2024 tropical season added significant impacts in August — October 2024 when hurricanes Debby, Helene and Milton Impacted Southwest Florida. The dune swale was filled with some sand and water due to Helene but was filled in with sand due to Milton. Even though drainage was obstructed, the dune swale shoaled with a large volume of sand that would have otherwise been over washed into condo buildings and garages. PBSD again quickly mobilized contractors to restore the drainage swale. This time, a full reconstruction of the swale to the elevations specified in the original USACE permit and South Florida Water Management Permit was completed. Biodegradable coconut fiber mesh was installed again to stabilize the banks. Pipes that connect to the dune swale had sand and debris removed from them. Now it is up to each condo association to install sand tolerant plantings between the condos and the dune swale on their private property to further stabilize the area. The following figure shows the condition of the swale in May 2025 post restoration. Page 2 of 3 Engineering assessment: The dune swale was designed and permitted as a nature -based channel to allow water to now on the landward side of the beach dune towards the natural wetland area where it would be discharged into Clam Bay. The natural vegetation and mangroves that lined the swale were part of bank stabilization and surface water management. The cumulative impacts of storms since Hurricane Irma in 2017, major impacts following Hurricanes Ian in 2022, then Helene and Milton in 2024 destroyed a large portion of the natural dune and swale bank vegetation that was part of the stormwater management system. The prompt response by PBSD to restore the swale's bottom elevations and stabilization of the side slopes with biodegradable mesh allowed immediate restoration of the main function of the swale to allow storm water to flow towards the bay during the rainy season. The function of the vegetation and mangrove banks that added visual aesthetics as well as year around functionality of the swale has not been fully restored. The restoration of dune and swale bank vegetation will need time to establish and coordinate with ongoing beach and dune restoration plans. Other alternatives such as replacing the Swale with a concrete culvert are not recommended forthis system for several reasons. The distance of the Swale is too long to maintain flow through a culvert without significant head difference or change on water levels. A culvert under such conditions will be subject to stagnation and blockages that will be very difficult to maintain and manage effectively. In addition, such a structure is not consistent with existing permits and environmental regulations due to the location of the Swale in the vicinity of beach dune and environmentally protected areas. Recommendations: The following recommendations are provided: • Continue to monitor the physical and environmental changes along the swale banks and beach/dune systems. • Develop and nature -based plan to restore the vegetations and mangrove shorelines alongthe dune back slopes where possible. • Restore and maintain dune vegetation to reduce sand over wash into the swale during heavy rain and storm events. • Periodic monitoring of the hydraulic function and water flow in the Swale to address any blockage or restriction to the flow. Sincerely yours, HUMISTON & MOORE ENGINEERS R pN;E.°„E°q �N F� Mohamed A. Dabees AU 2025.08.13 14:49:28 ....,ow,o-04'00' �ONNLEN Mohamed Dabees, Ph.D., P.E., BC. CE. Copy to: Neil Dorrill, PBSD Administrator Chad Colman, PBSD Director Page 3 of 3 om�\}.<\ Z<: 2 o / 7 /60 9) (D \ ® 3 / \ J « CO \{ AM = \• \ © w- �\ - .hL? . ) \\9 �w2 Lip.4,0 ft lk i f 1 r rt 1 .� M' ►Q! ` f „{ n4 Y ow I po W �f M4 C� �.. 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