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PBSD MSTBU Agenda 06/04/2012 .- , Man Wngrri i rJ PELICAN BAY SERVICES DIVISION BY: Municipal Service Taxing and Benefit Unit NOTICE OF PUBLIC MEETING MONDAY, JUNE 4, 2012 THE CLAM BAY SUBCOMMITTEE OF THE PELICAN BAY SERVICES DIVISION BOARD WILL MEET ON MONDAY, JUNE 4TH AT 3:00 PM AT THE COMMUNITY CENTER AT PELICAN BAY, LOCATED AT 8960 HAMMOCK OAK DRIVE, NAPLES, FLORIDA 34108 AGENDA Fiala :)___(//v____1 . Hiller Henning T Ak The agenda includes, but is not limited: Coyle ,/ Colette �L 1. Roll Call 2. Clam Bay Monitoring 3. Dredging Permit Application Misc. Corres: 4. Audience Comments 5. Adjourn Date: 9II1112 Item#: 1 to M-2,19 1`°1 Copies to: ANY PERSON WISHING TO SPEAK ON AN AGENDA ITEM WILL RECEIVE UP TO THREE (3) MINUTES PER ITEM TO ADDRESS THE BOARD.THE BOARD WILL SOLICIT PUBLIC COMMENTS ON SUBJECTS NOT ON THIS AGENDA AND ANY PERSON WISHING TO SPEAK WILL RECEIVE UP TO THREE (3) MINUTES. THE BOARD ENCOURAGES YOU TO SUBMIT YOUR COMMENTS IN WRITING IN ADVANCE OF THE MEETING. ANY PERSON WHO DECIDES TO APPEAL A DECISION OF THIS BOARD WILL NEED A RECORD OF THE PROCEEDING PERTAINING THERETO, AND THEREFORE MAY NEED TO ENSURE THAT A VERBATIM RECORD IS MADE, WHICH INCLUDES THE TESTIMONY AND EVIDENCE UPON WHICH THE APPEAL IS TO BE BASED. IF YOU ARE A PERSON WITH A DISABILITY WHO NEEDS AN ACCOMMODATION IN ORDER TO PARTICIPATE IN THIS MEETING YOU ARE ENTITLED TO THE PROVISION OF CERTAIN ASSISTANCE. PLEASE CONTACT THE PELICAN BAY SERVICES DIVISION AT (239) 597-1749. 5/31/2012 3:15:04 PM June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Comments by Mary McLean Johnson,Pelican Bay Foundation Board of Directors Page 1 of 1 (18 unread)-djtrecker-Yahoo!Mail 5/24/12 10:55 AM Re: Clam Bay PBSD Sub-committee Meeting Hide Details FROM: mlmassocaicp @aol.com Wednesday. May 23,2012 6 53 PM TO: djtrecker @yahoo.com Dave, I have returned north for the summer. My request to the I'iSr,would be to continue the monitoring being done by Tim Hall and Humiston and Moore and to take steps to have PBSD data entered into STORET and to be put on the distribution list to receive the CAC's annual water quality monitoring reports,as I mentioned in my prior email. Mary Mary McLean Johnson 65/3 iMarissa Loop 41501 Naples. FL 34108 (239)566-7515 —Original Message— From:david trecker<djtrecker a vahoo.com> To: Marcia Cravens<goldandrose @mac.com>;Ted Raia<tedraia @gmail.com>;mlmassocaicp <mlmassocaicp a( aol.com> Sent:Wed, May 23,2012 12:22 pm Subject: Clam Bay PBSD Sub-committee Meeting Marcia,Ted,Mary - A PBSD Clam Bay Sub-committee meeting to take input on new data and/or new issues pertaining to Clam Bay is scheduled for June 4, 3:00 p.m. at the Community center. If you have any new information to convey to the PBSD or if you seek PBSD action on any Clam Bay issues,please plan to attend and make your case. The meeting will be relatively brief(1.5 hours tops), so please plan to make your presentations/requests brief and specific. Thanks, Dave http://us.mg5.mail.yahoo.com/neo/launch Page 1 of 1 June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Clam Bay interior channel maintenance permit water quality testing requirements Page 1 of 1 ResnickLisa From: david trecker[djtrecker @yahoo.com] Sent: Wednesday, May 23, 2012 4:29 PM To: ResnickLisa Subject: Re: Clam Bay Permit Info Thanks. From: ResnickLisa<LResnick(a�colliergov.net> To: "Dave Trecker(djtreckert vahoo.com)"<ditrecker(o?yahoo.com> Cc: LukaszKyle<KyleLukasz(c�colliergov.net> Sent: Wednesday, May 23, 2012 4:18 PM Subject: FW: Clam Bay Permit Info Dr. Trecker,please see Kyle's email below re: Clam Bay Restoration permit. Thanks,Lisa From: LukaszKyle Sent: Wednesday, May 23, 2012 4:00 PM To: ResnickLisa Subject: Clam Bay Permit Info • Lisa, Information Dr.Trecker was looking for. The Clam Bay Restoration permit had a one year extension, after the initial ten year period and the one year extension the permit expired with no further action. We continue to perform WQ testing for Clam Bay as part of the new permit obtained for the interior channel maintenance. I asked Tim about the fecal coliform testing and he believes that CZM is performing some of these tests in Clam Bay but there is no requirement in our permits for this testing. For the last two or three years of WQ data we either have the last three WQ summaries that Tim prepared for the annual report or the full excel document,which I'm trying to get the updated version or we have the one on the H drive. Kyle • June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Status of Chairman Trecker's Clam Bay data requests Page 1 of 2 ResnickLisa Subject: 6/4 at 3 Clam Bay Subcommittee(Status of Dr. Trecker's Clam Bay Data Requests) From: david trecker fmailto:ditrecker @yahoo.coml Sent: Wednesday, May 30, 2012 5:18 PM To: ResnickLisa Subject: Re: FYI - Update on your requests re: Clam Bay Data Thanks, Lisa. From: ResnickLisa<LResnick @colliergov.net> To: "Dave Trecker(ditrecker(cr�,yahoo.com)"<ditrecker(a�yahoo.com> Sent: Wednesday, May 30, 2012 3:43 PM Subject: FYI -Update on your requests re: Clam Bay Data Dr. Trecker: FYI —See below RE: STORET to Kyle(awaiting further response from Tim Hall); and RE: request for Clam Bay data to Leo Ochs(Leo sent your request to Gary McAlpin; we are awaiting Gary's response). Will keep you posted. Thanks, Lisa From: LukaszKyle Sent: Wednesday, May 30, 2012 8:25 AM To: ResnickLisa Cc: Tim Hall Subject: RE: Clam Bay It has not been uploaded to Storet. I'll check with Tim to see when this could be loaded. Kyle From: david trecker fmailto:djtrecker @yahoo.coml Sent: Sunday, May 27, 2012 1:39 PM To: ResnickLisa Subject: Clam Bay Lisa- Could you confirm with Kyle that PBSD's Clam Bay monitoring data has been entered into STORET? If not, when will it be done? Thanks, Dave June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Status of Chairman Trecker's Clam Bay data requests Page 2 of 2 From: OchsLeo Sent: Tuesday, May 29, 2012 8:50 AM To: McAlpinGary Cc: CarnellSteve; ResnickLisa Subject: FW: Clam Bay Data FYA please From: david trecker fmailto:djtrecker(avahoo.coml Sent: Sunday, May 27, 2012 1:35 PM To: OchsLeo Cc: ResnickLisa Subject: Clam Bay Data Leo - Would you arrange to have sent to me, via the Pelican Bay Services Division office (lresnick@colliergov.net) the county's Clam Bay water-quality monitoring data, including fecal coliform,for the last three years? The PBSD has permitted responsibility for mangrove maintenance. As such, it would be useful to have a copy of the CZM water-quality data from Clam Bay. Many thanks, Dave June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Submitted by Marcia Cravens,Sierra Club Page 1 of 11 ResnickLisa From: david trecker[djtrecker @yahoo.com] Sent: Thursday, May 31, 2012 3:40 PM To: ResnickLisa Subject: Fw:follow up to discussion of items for the PBSD Clam Bay Committee meeting next week Attachments: Technical note.pdf Lisa-Please include this as part of the package to be distributed to the Clam Bay Sub-committee members prior to Monday's meeting. Thx,Dave Forwarded Message From: MARCIA CRAVENS<goldandrose @mac.com> To: Dave Trecker<djtrecker @yahoo.com> Sent:Thursday, May 31,2012 2:22 PM Subject:follow up to discussion of items for the PBSD Clam Bay Committee meeting next week Dave, Thank you for the coffee break meeting yesterday. I'm just following up on what we had discussed-- to identify them and include information for agenda prior to any deadline. Is today the deadline for giving materials to the PBSD office ? Please let me know if I need to send this email to Lisa or if you want to edit it before sending it to Lisa. If it's ok with you I can provide Lisa with a compressed email attachment or CD of the Clam Bay Benthic Study as fyi material. Recap of items I'm requesting to be included on the agenda: 1). WQ sampling results by Collier County identified fecal coliform pollution in the Clam Bay waterbodies for consideration of PBSD follow-up source tests. 2). Adopt the Conservancy of SWF Clam Bay Benthic Study as a benthic baseline and PBSD consider building on it with additional biologic surveys. Background Information on item 1 is excerpts of highlights from the main points in the Atkins Technical Note (dated March 9,2012) : Fecal Coliform Data Analysis Fecal coliform bacteria data from Clam Bay were compared to two criteria.The first criteria evaluated was to test if sufficient samples exceeded 43 CFU/100 mL based on the sample size(N=132).A minimum of 19 samples are required to not meet the fecal coliform bacteria criteria in order for Clam Bay to be placed on the verified list.Sixty-eight of the 132 data points(52%)exceeded Class II standard of 43 CFU/100mL.Based on this comparison alone.Clam Bay is impaired for fecal coliform bacteria.The second criteria compared the median fecal coliform value for each station to 14 CFU/100 mL(Table 1).Sufficient data points are not currently available to complete a station by station comparison with the 14 CFU/100mL criteria required for the verified list.However,only ten samples are required by station for inclusion on the planning period list.All nine water quality stations had median fecal coliform bacteria values above 14 CFU/100mL. Source identification studies are recommended to determine whether anthropogenic factors cause of the elevated bacteria concentrations prior to developing recommendations for remediation(Bernhard and Field 2000). In an effort to better identify the potential fecal coliform bacteria sources to Clam Bay, Collier County pursued a microbial source tracking (MST)effort for Clam Bay. Samples were collected in Clam Bay and analyzed for both the qualitative and quantitative evidence of both bacterial genes and viruses specific to humans, specifically the Bacteroidetes Human Gene Biomarker and Human Urine Viruses(Polyomavirus).While positive results would indicate a human source was present, negative results do not prove that human sources are not present. The portion of the watershed directly adjacent to the Clam Bay is connected to a sewer system for wastewater disposal. However, portions of the larger Clam Bav watershed appear to contain active OSTDS systems. Therefore, a human source of the fecal coliform levels in Clam Bay cannot be completely discounted at this time, but based on the research conducted, it is highly improbable that humans are a significant source. FYI I've added an attachment below of the complete Fecal coliform_technical note3-09-2012 June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Boat Submitted by Marcia Cravens,Sierra Club Page 2of11 .1 This was reported to the Coastal Advisory Committee by staff at their May 2012 meeting but no action was recommended or taken on it. When I spoke to the CAC members on this agenda item--I expressed concern that the technical note speculated with anecdotal data and conjecture that the fecal coliform was likely from birds,but the limited additional testing that Atkins did is not sufficient to rule out an anthropogenic source for fecal coliform. I commented to the CAC that our community has good reason to be concerned and that the PBSD should follow up on this issue. Mayor John Sorey,who chairs the CAC was supportive for me to bring this issue to the PBSD for the PBSD to take action to follow up on it. Since the Atkins Technical Note has very clearly included information and mapped quite a few potential sources(septic tanks in the Pine Ridge development)that are within the drainage area of the Clam Bay watershed basin AND the Technical Note asserts that Clam Bay WQ sampling results that are positive for fecal coliform meet the criteria of"impaired water"to the degree that this consultant asserts Clam Bay would be added to the State of Florida's impaired waters "planning list"AND the consultant firm's Technical Note failed to identify another potential site of the Seagate Subdivision(due to originally being built with septic tanks)... My thoughts are that PBSD needs to be proactive on this issue because additional follow up testing may be able to definitively prove that the fecal coliform is not from an anthropogenic source OR if the additional testing indicates there is an anthropogenic source,then the PBSD is the proper entity to take the next steps of identifying the actual source site(s)and making recommendations to adequately address it. This issue should be very concerning to the PBSD because any anthropogenic source would be an uplands site and is within the scope of water management for our MSTBU and also because our people recreate in the Clam Bay waterbodies and the PBSD is responsible for the Surface and Storm Water Management within Pelican Bay boundaries that is supposed to prevent pollution of Clam Bay within our boundaries. When John Sorey expressed support for me to inform the PBSD of this report and recommend for the PBSD to do further WQ testing to investigate whether the fecal coliform was from anthropogenic sources--we briefly discussed that it can be accomplished by WQ testing for occurrence of caffeine. I've attached an excerpt of SOW quotefrom a consultant to the city of Naples--just for the portion of the SOW that's relevant to this particular issue NOTE that the PBSD would not expect to have all of the Administrative expense shown on this excerpt if this task was an added task to their existing consultant Turrell,Hall, and Assoc. for the work this consultant is already doing under their contract with the PBSD because it would only slightly increase Administrative services already being paid under their contract. Background Information on item 2(the 2010 Clam Bay Benthic Study is too large to include as an attachment,but will be provided on CD): The 2010 Clam Bay Benthic Study was obtained as a result of collaborative effort that I pursued to get this necessary benthic baseline done. The benthos is the lowest level of the biologic habitats and "bottom feeders"in a wetlands ecosystem. It was a necessary first step to an assessment of the health of the Clam Bay Conservation Area's Mangrove Ecosystem-- but a second and third step are needed to build upon it in order to achieve a comprehensive assessment of the Mangrove Ecosystem of Clam Bay. The second step is to do fish surveys as fish constitute a median level in the food web and the third step is to do bird surveys as birds constitute a higher level in the food web. These next step surveys need to be done in two phases--one in summer months and one in winter months--because there are different species that would occur during those different seasons. These surveys need to be done within a reasonable time after the benthic study was completed so as to have a connected biologic framework of comprehensive assessment. * June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Submitted by Marcia Cravens,Sierra Club Page 3 of 11 The PB SD has been the steward that addresses monitoring the health of the Clam Bay Conservation Area Mangroves Ecosystem. The mangroves ecosystem is not just the mangroves trees... The mangroves are particularly important habitat to fishes and provides essential fishery habitat for many marine species that must complete some part of their life cycle in a mangroves estuary. The mangroves canopy is important habitat and food source for many bird species (and our MSTBU property owners greatly enjoy the beautiful birds and their birdsongs as an aesthetic amenity in PB). Adopting the Conservancy's Clam Bay Benthic Study and following it with the next steps of fish and bird surveys is an appropriate activity for the PBSD for 2012-2013. Thank you for your consideration and service to our community and hopefully for your support to vote approval of these two actions. Marcia Cravens June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Booed Submitted by Marcia Cravens,Sierra Club Page 4 of 11 , UAU Iviay I I,ZU'IZ VII-4 Staff Reports 1 of 8 LA Z Technical note C Project: Clam Bay NNC To: Gary McAlpin Subject: Fecal Coliform From: David Tomasko, PhD Date: March 2012 cc: Clam Bay Clam Bay is an important natural feature in Collier County.The Clam Bay system consists of three tidally influenced lagoons: Upper, Inner and Outer Clam Bays(Figure 1).Associated with the increased development of Collier County, there has been concern among the public that Clam Bay might have been adversely impacted by environmental pressures that typically accompany population growth. In its historical configuration, Clam Bay would have received fresh water discharges mostly via small tidal creeks and groundwater inflow.Watershed development most likely increased both the amount of freshwater discharged into Clam Bay due to an increase in stormwater runoff,as well as loads of total suspended solids, nitrogen, and phosphorus(PBS&J,2008). Figure 1. Upper, Inner,and Outer Clam Bay are all part of the Clam Bay system. z Upper Clam Bay E` : J =. Inner Clam Bay • I ?Tv • Outer Clam Bay :,L A I° ii l t a-r'{-t tic The Clam Bay system was impacted in the 1950s by the construction of two roads;Vanderbilt Beach Road to the north and Seagate Drive to the south. Historically, Clam Bay was connected to the Gulf of Mexico indirectly via Wiggins Pass to the north and Doctor's Pass to the south,as well as its direct connection via Clam Pass. Outer Clam Bay temporarily lost its historic connection to Moorings Bay(located to the south)in the 1950's when Seagate Drive was constructed.As it was originally configured, Seagate Drive cut off tidal connections to the south,and Clam Pass was left as the only connection to the Gulf of Mexico. In response to water quality concerns, culverts were placed under Seagate Drive in 1976 to allow for tidal exchange between Clam and Moorings Bays. Originally,the culverts were intended to allow flows only from Moorings Fecal coliform_technical note 3-09-2012 Plan Design Enable • June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Submitted by Marcia Cravens,Sierra Club Page 5 of 11 ui Niay'11,zuiz VII-4 Staff Reports 2of8 z Technical note Bay into Clam Bay, but their construction was such that flows occurred in both directions(Collier County, 1997). In the 1980s,the tidal connection between Upper Clam Bay and Vanderbilt Lagoon (to the north)was severed due to development activities(Collier County, 1997).Although Clam Bay's watershed had been extensively developed,the shoreline of Clam Bay has remained in an almost entirely natural condition,with mangroves, rather than seawalls,as the dominant feature. Fecal coliform bacteria Microbiological indicators of fecal contamination,such as the fecal coliform group and its member Escherichia coli(E. cols)and Enterococcus spp. (enterococci), found in the gastrointestinal tracts of humans, as well as those of warm-blooded and some coldblooded animals(APHA 1995, Harwood et al. 2000), have been used for over a century to warn of fecal contamination risk in water and food.These organisms, along with enteric pathogens, are shed in feces that can contaminate surface and ground water. Microorganisms from fecal sources that enter waters used by the public can pose a health threat,whether the water is used as a drinking water source,for recreational activities such as fishing or swimming,or for aquatic farming activities such as shellfish harvesting. In addition to public health risks,fecal contamination can result in adverse economic impacts due to the closure of recreational beaches and shellfish-harvesting areas. Fecal contamination results when untreated fecal material from humans,other warm-blooded animals, and some cold-blooded animals enters a waterbody. In many waterbodies,fecal coliform contamination stems from a combination of human,wildlife,and domestic animal sources.When there is no obvious probable source of fecal pollution, a more exhaustive search is required.The background information collected for an impaired waterbody should be supplemented with a thorough field examination. In some cases,the use of more advanced techniques(e.g.,targeted sampling of suspected sources, investigation of existing infrastructure)may be appropriate as part of the field examination.Once combined,visual inspections, sampling results, and historical data generally suggest potential source(s)of fecal contamination. Probable sources may include the following: • Wastewater infrastructure; • Wildlife; and/or • Specific land uses(e.g., livestock,aquaculture, marinas, dog parks). FDEP Fecal Coliform Regulations Clam Bay is designated as a Class II, marine waterbody. Class II status indicates that the designated use of the waterbody is for shellfish propagation and harvesting. Clam Bay data provided by Collier County for the period of 2009 to 2011 were compared against the appropriate standard for fecal coliform bacteria. The FDEP IWR contains approved methods for evaluating water quality of lake, stream,and marine waterbodies. Fecal coliform bacteria standards are more stringent for Class II waterbodies compared to Class III (recreational use). The appropriate standard to evaluate fecal coliform bacteria impairment status in Clam Bay, based on the F.A.C. 62-303.470 is stated as follows: Class II waters shall be included on the verified list for coliform impairment if, following review of the available data as described in subsection 62-303.460(2), F.A.C. (a) The number of samples above 43 counts per 100 mL meet the requirement in subsection 62-303.420(6), F.A.C., with the exception that paragraph 62-303.320(4)(a), F.A.C., does not apply and samples collected on different days within any four day period will be assessed as daily samples, or (b) The water segment includes a sampling location that has a median fecal coliform MPN value that exceeds 14 counts per 100 ml for the verified period. To calculate a median value for a sampling location, there shall be at least 20 samples collected during the verified period. Fecal coliform_technical note_3-09-2012 Man Design Enable June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Boa•d Submitted by Marcia Cravens,Sierra Club Page 6 of 11 UHU sway,i i,Lu iz VII-4 Staff Reports 3of8 ((� Technical note Fecal Coliform Data Analysis Fecal coliform bacteria data from Clam Bay were compared to two criteria. The first criteria evaluated was to test if sufficient samples exceeded 43 CFU/100 mL based on the sample size(N=132). A minimum of 19 samples are required to not meet the fecal coliform bacteria criteria in order for Clam Bay to be placed on the verified list. Sixty-eight of the 132 data points(52%)exceeded Class II standard of 43 CFU/100mL. Based on this comparison alone, Clam Bay is impaired for fecal coliform bacteria. The second criteria compared the median fecal coliform value for each station to 14 CFU/100 mL(Table 1). Sufficient data points are not currently available to complete a station by station comparison with the 14 CFU/100mL criteria required for the verified list. However, only ten samples are required by station for inclusion on the planning period list. All nine water quality stations had median fecal coliform bacteria values above 14 CFU/100mL. Table 1. Fecal coliform bacteria summary statistics(2009-2011) N Average Median Geometric Minimum Maximum Criteria Mean Clam 132 55 44 35 1 310 43 Bay Station statistics C B 1 11 109 94 89 28 310 14 CB2 14 95 70 80 32 230 14 CB3 14 58 60 49 17 111 14 CB4 14 56 47 43 6 114 14 CB5 16 52 48 37 1 115 14 CB6 16 28 16.5 18 3 88 14 CB7 16 24 22 16 3 54 14 CB8 16 54 27 32 4 290 14 CB9 15 42 28 23 1 153 14 Data from Collier County(2009-2011) Though values exceed the regulatory standard, it should be considered that fecal coliform bacteria may not be an appropriate indicator of pathogenic diseases in sub-tropical environments such as Florida. The specificity of the fecal coliform test is compromised by the more constant and warmer ambient water temperatures in Southwest Florida.The inability to specifically identify humans as a source of bacteria using traditional indicator testing protocols has been noted by Fujioka(2001)and Fujioka et al. (1999)for various tropical locations. Source identification studies are recommended to determine whether anthropogenic factors cause of the elevated bacteria concentrations prior to developing recommendations for remediation (Bernhard and Field 2000). Source Identification Elevated fecal coliform bacteria concentrations have been attributed to wildlife, livestock, domesticated animals and birds (Levesque et al. 1993, Minnesota Pollution Control Agency 2002). In prior TMDLs, birds were estimated to produce 200 to 400 million fecal coliform bacteria per bird per day(humans about 2 billion per day; Minnesota Pollution Control Agency 2002). Using a low end estimate of 200 million fecal coliform bacteria per bird per day,one bird could cause 124,000 gallons of water to exceed 43 CFU/100 mL. The total volume of Clam Bay is approximately 105 million gallons. Therefore, it is feasible to expect that 850 birds could produce enough bacteria—every day—to cause 105 million gallons of water to exceed 43 CFU/100 mL. Fecal coliform bacteria are susceptible to both die-off due to the saline environment and in- Fecal coliform technical note 3-09-2012 Plan Design Enable June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Submitted by Marcia Cravens,Sierra Club Page 7 of 11 • UHL.May I I,zUlz VII-4 Staff Reports 4o18 Technical note situ production. Regardless, it is within the realm of possibilities that birds are an important source of the bacteria in Clam Bay. The Audubon Society completes a one-day Christmas bird count annually nation-wide. In 2010, 7,057 mangrove-utilizing birds were counted in the Naples region (15 mile diameter circle)with an additional 8,188 birds counted which may utilize mangrove habitats during parts of their day or lifespan (Table 2). Based on these results, it is feasible that several dozen to several hundred birds could utilize the Clam Bay mangrove habitats on a daily basis. Table 2. Audubon Society Christmas 2010 Christmas Bird Count for Naples,Florida Common Name Number Mangrove Utilization Brown Pelican 270 Inhabits mangroves/possible breeder Double-crested Cormorant 690 Inhabits mangroves/possible breeder Great Blue Heron (Blue form) 60 Inhabits mangroves/possible breeder Great Egret 120 Inhabits mangroves/possible breeder Snowy Egret 80 Inhabits mangroves/possible breeder Little Blue Heron 90 Inhabits mangroves/possible breeder Tricolored Heron 85 Inhabits mangroves/possible breeder Reddish Egret 1 Inhabits mangroves/possible breeder Cattle Egret 50 Inhabits mangroves/possible breeder Green Heron 7 Inhabits mangroves/possible breeder Yellow-crowned Night-Heron 4 Inhabits mangroves/possible breeder White Ibis 900 Inhabits mangroves/possible breeder Laughing Gull 4,700 Inhabits mangroves/possible breeder Subtotal 7,057 Common Name Number Mangrove Utilization Northern Harrier 2 May hunt in area during winter Wood Stork 65 Occasional user/not breeder in mangroves Black Vulture 400 Occasional user/ not breeder in mangroves Turkey Vulture 1,800 Occasional user/ not breeder in mangroves Ring-billed Gull 1,900 Occasional user/not breeder in mangroves Herring Gull 45 Occasional user/not breeder in mangroves Lesser Black-backed Gull 1 Occasional user/ not breeder in mangroves Forster's Tern 23 Occasional user/ not breeder in mangroves Royal Tern 160 Occasional user/ not breeder in mangroves Sandwich Tern 18 Occasional user/ not breeder in mangroves Black Skimmer 480 Occasional user/not breeder in Fecal coliform_technical note_3-09-2012 Plan Design Enable June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Boacd Submitted by Marcia Cravens,Sierra Club Page 8 of 11 UlAU May i i,N1.E VII-4 Staff Reports 5 of 8 {/') Technical note mangroves Belted Kingfisher 30 Occasional user/ not breeder in mangroves Fish Crow 280 Occasional user/ not breeder in mangroves Osprey 70 Feeds/perches in mangrove area Bald Eagle 32 Feeds/perches in mangrove area Peregrine Falcon 1 Occasionally found in winter Prairie Warbler 7 Possible breeder in mangroves Red-winged Blackbird 27 Possible breeder in mangroves Lesser Scaup 65 Possibly found in bay during winter Common Loon - Possibly found in bay during winter Black-bellied Plover 50 Shorebird Semi-palmated Plover 2 Shorebird Killdeer 270 Shorebird Spotted Sandpiper 13 Shorebird Greater Yellowlegs 5 Shorebird Willet 100 Shorebird Lesser Yellowlegs 6 Shorebird Ruddy Turnstone 60 Shorebird Sanderling 230 Shorebird Western Sandpiper 21 Shorebird Least Sandpiper 140 Shorebird Dunlin 75 Shorebird Common Grackle 1,600 Uses area Boat-tailed Grackle 210 Uses area Subtotal 8,188 Total 15,245 In an effort to quantify the fecal coliform concentration of native wading bird populations in Clam Bay, bird guano samples were collected on two occasions from Clam Bay,August 25'n and October 4`h, 2011. Fresh bird guano samples were collect from resident wading birds(eg. predominantly white ibis). A collection of the complete guano samples was attempted but was successful in only two of the samples. Five samples were collected in August and two samples were collected in October. The samples were transported to the Collier County water quality lab for analysis. The range in fecal coliform concentrations associated with these single bird defecation"events"was highly variable(<1 to 290,000 cfu/100mL). The two samples in which the entire defecation event was collected had fecal coliform bacteria values of 150,000 and 290,000 cfu/100 mL. Based on the results of these samples,the wading bird population in Clam Bay is likely a substantial source of bacteria to Clam Bay. In an effort to better identify the potential fecal coliform bacteria sources to Clam Bay, Collier County pursued a microbial source tracking (MST)effort for Clam Bay. Samples were collected in Clam Bay and analyzed for both the qualitative and quantitative evidence of both bacterial genes and viruses specific to humans, specifically the Bacteroidetes Human Gene Biomarker and Human Urine Viruses(Polyomavirus). While positive results would indicate a human source was present, negative results do not prove that human Fecal coliform technical note 3-09-2012 Plan Design Enable June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Submitted by Marcia Cravens,Sierra Club Page 9 of 11 UP& May II,ZU IZ VII-4 Staff Reports 6of8 1/) Z Technical note sources are not present. Water samples were collected at three locations(Upper Clam Bay(CB-1), Inner Clam Bay(CB-3)and Outer Clam Bay(CB-5))on two occasions,August 25,2011 and October 4,2011. Samples were transported to Source Molecular for microbial source tracking as well as to the Collier County lab to quantify fecal coliform concentrations. The microbial source tracking results were negative for all three sites for both sampling events indicating that a human source was not detected for those samples. In addition, the results of the fecal coliform analysis indicated that elevated bacteria counts were observed in August(>43 cfu/100mL)but not in October. Sanitary Sewer Infrastructure The sanitary sewer infrastructure in the Clam Bay watershed is comprised of a mixture of sewer and on-site sewage treatment and disposal systems(OSTDS). The Seagate Community, located in the southern portion of the watershed, utilize a sewer system for wastewater disposal. In addition, the developments on the west side of US41 adjacent to Clam Bay do not appear to utilize an OSTDS system based on the best available data (provided by the Florida Department of Health (FDOH))and are likely using a sewer system. While communities directly adjacent to the Clam Bay watershed utilize a sewer system,there are portions of the Clam Bay watershed east of US 41 which are connected to an OSTDS system. Approximately 130 active OSTDS systems are documented by FDOH in the Clam Bay watershed, which represents a minor portion of the households located in the watershed (Figure 2). While active OSTDS have been located within the watershed, a properly functioning OSTDS and associated drainfield is designed to effectively remove fecal coliform bacteria and viruses from wastewater. Prior studies which evaluated the fecal coliform and bacteria presence in soil samples within and below the infiltration zone of properly operating OSTDS have documented substantial reductions in the amount of fecal coliform bacteria and viruses within the OSTDS and their associated drainfield (Lewis and Stark 1993,Anderson et al. undated). Therefore the presence of OSTDS or sewer systems within the Clam Bay watershed would not necessarily indicate that they are a basis for concern regarding fecal coliform bacteria contamination, unless widespread instances of OSTDS failures are occurring. Conclusions Clam Bay has elevated bacteria concentrations;therefore, it is classified as an impaired waterbody for fecal coliform bacteria based on the Class II waterbody standards. The potential sources for fecal coliform bacteria include:wastewater infrastructure,wildlife,specific land uses. While Clam Bay is impaired, based on Class II standards, it should be considered that fecal coliform bacteria may not be an appropriate indicator of pathogenic diseases in sub-tropical environments such as Florida. The specificity of the fecal coliform test is compromised by the more constant and warmer ambient water temperatures in Southwest Florida. Bird populations have been documented as potential sources of fecal coliform bacteria in prior TMDLs (Minnesota Pollution Control Agency 2002). Based on the results from the fecal coliform concentrations of bird guano from local birds, the wading bird population in Clam Bay is likely an important source of the bacteria concentrations in Clam Bay. Additionally, microbial source tracking efforts did not provide evidence of a human source, even when fecal coliform counts were high in the Bay. While the lack of a positive human marker does not exclude the possibility of human sources, it provides evidence that non-human sources could be the primary source of the elevated bacteria concentrations. The portion of the watershed directly adjacent to the Clam Bay is connected to a sewer system for wastewater disposal. However, portions of the larger Clam Bay watershed appear to contain active OSTDS systems. Therefore,a human source of the fecal coliform levels in Clam Bay cannot be completely discounted at this time, but based on the research conducted, it is highly improbable that humans are a significant source. Fecal coliform technical note 3-09-2012 Plan Design Enable June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Submitted by Marcia Cravens,Sierra Club Page 10 of 11 l;/U May 7i,LUiL VII-4 Staff Reports 7 of 8 (� MOM Technical note Literature Cited Anderson, D.A. Lewis,and K. Sherman. undated. Unsaturated Zone Monitoring below subsurface wastewater systems serving individual homes in Florida. American Public Health Association(APHA),American Water Works Association (AWWA), and Water Environment Federation (WEF). 1995. In A. D. Eaton, L.S. Clesceri, and A. E. Greenberg (Eds.), Standard Methods for the Examination of Water and Wastewater, 19th Edition,Washington, D.C. Bernhard,A.E., and Field, K.G., 2000,A PCR assay to discriminate human and ruminant feces on the basis of host differences in Bacteroides-Prevotella genes encoding 16S rRNA:Applied and Environmental Microbiology 66(10): 4571-4574. Collier County, 1997. Clam Bay Natural Resources Protection Area. Report. 85 pp Fujioka, R.S.2001. Monitoring coastal marine waters for spore-forming bacteria of faecal and soil origin to determine point from non-point source pollution.Water Science and Technology. 44: 181-188. Fujioka, R.S., Stan-Denton, C., Borja, M., Castro,J., and K. Morphew. 1999. Soil,the environmental source of Escherichia coli and enterococci in Guam's streams.Journal of Applied Microbiology. (Symposium supplement)85:83S-89S. Harwood,V.J.,Whitlock,J., and Withington,V. 2000. Classification of antibiotic resistance patterns of indicator bacteria by discriminant analysis: use in predicting the source of fecal contamination in subtropical waters.Appl Environ Microbiol 66(9): 3698-704. Lewis,A. and L. Stark. 1993. Florida OSDS Research Project:Viral Study Summary. Minnesota Pollution Control Agency.2002. Regional Total Maximum Daily Load Evaluation of Fecal Coliform Bacteria Impairments in the Lower Mississippi River Basin in Minnesota. Submitted to the U.S. Environmental Protection Agency.October 2002. PBS&J. 2008. Clam Bay Seagrass Assessment. Submitted to Collier County Coastal Zone Management Department. Fecal coliform_technical note 3-09-2012 Plan Design Enable June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Submitted by Marcia Cravens,Sierra Club Page 11 of 11 l:HU May 1 1,Zu 1 Z VII-4 Staff Reports 8of8 V) Z Ne S. Technical note Figure 2. Known active permitted OSTDS systems within the Clam Bay watershed(source: FDOH). "F ( F l_‘''."ti.: : ,'%.1•\•1•`t4,..•!,',:— ,-„..4'--.1'7f:;,•--: atI 1 7 Legend „ €4' - • v,de b� ''"' , fig ,' Onsite Sewage Treatment ' u 8edsna 44 . ® and Disposal Syslem t" t y /��4'"t °. - ° Watershed >' ♦ v o s 1 <flc r °a i 0 0,2 04 Miles ) , a c- ;` . •-... , 1,'!' h "17&j .; 3,an.r }r -,, .i, Clam ii. t i,'",:'^ b +f p x 1 t iµ ' A� 3,-,, awn-13-."...7...'6'1.. n y x i t ��,Jc� t$ t 'Af �t. • -..Bay t0t9 e t. , •t =+ ;..r t d!+♦ .ti 4;t ''' y" ' fi I. S-i ,i J '',.%), d ' .a t o;A ij . • tt-• t .,j '• • +. DES 'F. • . - tit -.. .C= t- i , r i4- . . f ►" Y , l t` . ,r , s`'a yy t x tf' V r iy y-'V 1 ' Tyr ri�." Inner ( /0::',/1.. ,[''qtr ' r i \NY. Clam , ..� ' ' S r . Y Y r BaY ,,.% x.e + �3, a i<.. .-. 1.14,-,,, 4.a ) 1.I " jf s� . ' ai - �t ! ,`Z".. t,. i�4: ,. .i , `4,f`,, • � • , a 1: wa i } i...1... -1.-`. -11- '''''-f-`� a♦a . �'0. ifit\i m� a Outer ti X3 tt ..� Clam ;'. "X t • a �. Bay 404\1, .5. ' l J. 1 .nb`t` -s.T:iii'- t ". •:._3.t �.c_sN L.i`r+•_Fr+t -.t. > Fecal coliform_technical note 3-09-2012 Plan Design Enable June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Summary of Pelican Bay Services Division Board Requests Page 1 of 1 PBSD CLAM BAY SUB-COMMITTEE SUMMARY OF REQUESTS TO PBSD (1) Have Clam Bay monitoring data entered into STORET. (Mary Johnson, PB Foundation) IN PROGRESS (2) Have county's annual water-quality monitoring reports sent to PBSD. (Mary Johnson, PB Foundation) REQUEST MADE TO COUNTY (3) Carry out fecal coliform testing as part of PBSD water-quality monitoring to determine if high fecal levels are from humans. If so, inland water testing may be in order to determine the source, e.g., nearby septic systems. (Marcia Cravens, Sierra Club) (4) Fund fish and bird surveys to supplement recent Conservancy benthic survey. Purpose is to establish a baseline for biological health of the estuary to complement hydrologic data. (Marcia Cravens, Sierra Club) (5) Send letters to the county and the U.S. Army Corps of Engineers expressing concern about the recent dredging permit application. Bases for concern: (a)New analyses show the permit application would allow more extensive dredging than allowed in 1998 permit and more extensive dredging than carried out in 2007. (b)There are no legally binding triggers for dredging in the current permit application. (Ted Raia and Linda Roth, MAG) June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Submitted by Linda Roth,Mangrove Action Group Page 1 of 4 ResnickLisa --- V I- Subject: 6/4 at 3 Clam Bay Subcommittee(submitted by Linda Roth) From: david trecker[mailto:djtrecker @yahoo.com] Sent: Thursday,May 31,2012 1:06 PM To: ResnickLisa Subject: Fw: Request for Information: FDEP Permit 0296087-001-JC(Clam Pass)wider. Lisa-Please include this in materials distributed to sub-committee members. Thx. Dave Forwarded Message From: "lor3lor3 @aol.com" <lor3lor3 @aol.com> To: djtrecker @yahoo.com Sent: Thursday, May 31,2012 12:50 PM Subject: Re: Request for Information: FDEP Permit 0296087-001-JC (Clam Pass)wider. Dave, See my response in red below. Linda Original Message From: david trecker<djtrecker @yahoo.com> To: lor3lor3 <lor3lor3 @aol.com> Cc: Ted Raia<tedraia @gmail.com> Sent: Thu,May 31,2012 10:36 am Subject: Re:Fwd: Request for Information: FDEP Permit 0296087-001-JC(Clam Pass) Linda- Several questions ... - Is the drawing from which you took the data under"Current Proposal" a part of the permit application as defined by Dr. Edwards? Yes -I thought the entry cut was limited to 80 ft. You report widths of 120 to 254 ft.These are dimensions for cuts in Section 2 of the pass,not the mouth. The maximum width for the mouth is 80 ft. The widths of the cuts in Section 2& 3 of the pass are wider. - Was any trigger for dredging included in the 1998 permit?If not,why should there be one in the current permit application?There was no triggers in the 1998 permit. Gary and his consultant Atkins/PBSJ included the triggers in their response to the "Request for Additional Information(RAI)"to FDEP in the current permit application.They also sent them to all the other regulatory agencies(USACE, FWC, USFWS). That was the reason I was very concerned. Now Dr. Edwards assured that only two documents attached to the Draft permit are part of the permit. The rest of the documents presented by the County in the application process are not part of the permit. This means FDEP will not enforce anything else that is not part of the permit. Linda From: "lor3lor3@aol.com"<lor3lor3 a,aol.com> To: djtrecker n,yahoo.com Sent: Thursday,May 31,2012 9:23 AM Subject: Fwd: Request for Information: FDEP Permit 0296087-001-JC (Clam Pass) Dave, June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division BoacU Submitted by Linda Roth,Mangrove Action Group Page2of4 Thanks for allowing Ted(and me)to make a Power Point presentation at the next PBSD meeting. Please see the attachment. It is a simplified Comparison(discrepancies)Table I made as per your suggestion. I think Ted will be including it in the packet he is preparing for you to be delivered today. But I am not sure,so I am forwarding it to you. I have also made copies of it for the Clam Bay Subcommittee members. I am forwarding the email stream below for your information. Dr.Lainie Edwards clearly expressed that no documents other than the two(drawings&QAQC)attached to the Draft permit are part of the authorized permit. Therefore,the understanding made between Steve F. and Gary McAlpin shown on the regulatory agencies'RAIs is not part of the permit. The regulatory agencies will not enforce it. Read from bottom up. Linda Original Message From:Edwards,Lainie<Lainie.Edwards(a,dep.state.fl.us> To: 'lor3lor3 cr,aol.com'<lor3lor3(.iaol.com> Cc: Warden, Stan<Stan.Warden(nidep.state.fl.us> Stan Warden is the FDEP attorney, Office of General Council(OGC) Sent:Wed,May 30,2012 10:35 am Subject:RE:Request for Information: FDEP Permit 0296087-001-JC(Clam Pass) Sorry for the delay in my response—I have been swamped for the last few days,and we are short staffed. Below are the further clarifications to your answers: 1.No. These were provided as part of the review process. All DEP requirements for the permit are included in the permit,and /or attachments. 2.No—all requirements for an authorized project are included in the permit 3.Yes. Hopefully this helps. Thanks, Lainie Edwards,Ph.D. Bureau of Beaches and Coastal Systems Florida Department of Environmental Protection 3900 Commonwealth Boulevard,M.S.300 Tallahassee,Florida 32399 850-414-7796(phone)/850-414-7725(fax) Original Message From: lor3lor3<lor3lor3 @aol.com> To:Lainie.Edwards<Lainie.Edwards(a,dep.state.fl.us> Sent: Thu,May 24,2012 3:42 pm Subject:Additional Clarification Needed:FDEP Permit 0296087-001-JC(Clam Pass) Dear Dr.Edwards, Thank you so much for your prompt response,and helpful information. I would be most grateful if you could provide further clarification to my questions below. Short simple answers or"Yes" or"No"will do. You stated: "These documents were provided in the application and RAI process,and can be located online under the "application"or"completeness review"tabs(http://bcs.dep.state.fl.us/env- prmt/collier/pending/0296087 %20Clam%20Pass/001 JC/).They are not required to be attached to the permit or intent. The only application items typically included with permit(as attachments)are project drawings,QA/QC plans,and • June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Submitted by Linda Roth,Mangrove Action Group Page 3 of 4 possibly physical monitoring plans or biological monitoring plans(if applicable). All other issues/requirements are addressed directly in the permit." 1.Am Ito understand that besides the project drawings, and QAQC plans(attachments to the Draft permit),all other documents provided in the application and RAI process by Collier County Coastal Zone Management are not components or parts of the dredging permit authorized by FDEP? Therefore, the County's Narrative Response to RAI item 33,specifically,the proposed dredging"triggers",and references to dredging of the inlet ebb shoal are not parts of the permit authorized by FDEP? 2.Are there any application items not required to be attached to or included in the Draft Permit that can be considered as parts of the authorized permit? If"Yes",please indicate which ones. 3. Are the documents furnished by the County, other than the ones specified in the Draft Permit Authorization,just for assessment/evaluation of the permit application by FDEP? They are and will not be part of the authorized permit for dredging Clam Pass. I apologize for not expressing my query clearly earlier. Thank you for your kind patience. Sincerely, Linda Roth 7575 Pelican Bay Blvd. Naples,FL 34108 239-254-8889 Original Message From: Edwards, Lainie<Lainie.Edwards @dep.state.fl.us> To: lor3lor3 <lor3lor3(a,aol.com> Sent: Thu,May 24,2012 12:49 pm Subject:RE:FDEP Permit 0296087-001-JC(Clam Pass) Hi Linda, These documents were provided in the application and RAI process,and can be located online under the"application" or "completeness review"tabs(http://bcs.dep.state.fl.us/env-pant/collier/pending/0296087 %20Clam%20Pass/001 JC/). They are not required to be attached to the permit or intent. The only application items typically included with permit (as attachments) are project drawings, QA/QC plans, and possibly physical monitoring plans or biological monitoring plans(if applicable). All other issues/requirements are addressed directly in the permit. As far as each dredging event:Prior to each dredging event, according to the draft permit,the permittee has to provide topographic surveys of the area for Dept.review and approval for the event. Hopes this helps to answer your questions. Sincerely, Lainie Edwards, Ph.D. Bureau of Beaches and Coastal Systems Florida Department of Environmental Protection 3900 Commonwealth Boulevard,M.S. 300 Tallahassee,Florida 32399 850-414-7796(phone)/850-414-7725 (fax) From: lor3lor3(d,aol.com [mailto:lor31or3( aol.com] Sent: Tuesday,May 22,2012 10:02 PM June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Boat Submitted by Linda Roth,Mangrove Action Group. Page 4 of 4 + ,� To: Edwards,Lainie Subject: FDEP Permit 0296087-001-JC(Clam Pass) Dear Dr.Edwards, As I read the DRAFT Consolidated Joint Coastal Permit and Sovereign Submerged Land Authorization for Permit 0296087-001-JC(Clam Pass),I noticed that the supporting materials(attachments)presented in the permit application as well as the Responses to the FDEP RAIs are not included in the permit authorization. Does the absence of these documents mean that the applicant,Collier County Coastal Zone Management,is not authorized to perform activities according to the specifications detailed in the attachments to the permit? For example,the Narrative Response to Attachment Item 33A contains dredging triggers which define when dredging can occur. Attachments 33A.1,33A.2,and 33B reference materials in respect to dredging of the inlet ebb shoal. I would appreciate it very much if you could respond to my query as soon as possible. For your convenience and reference,I have attached files "Final Order" (Draft permit authorization)and"Intent" (Intent to Issue Notice). Thank you for your kind attention. • Sincerely, Linda Roth 7575 Pelican Bay Blvd. Naples,FL 34108 239-254-8889 . . " . . ... , . , . : .. . • 7:7:f.'$.- , . „ ! . . .. .. :• . ..... rD ei .,....,,• -- , •:,-r-_: _ . ••,.,' • '',..; 1:111 1 I „ , .,.,•,:...:, P , , 1 ci) i-t 0_4 • pm.11 • r-t- 1....• • cn 1 I ,.......... ., ,, .., 1;11i) 0 (1) )••■•11 X el'a CD cin 'A) Phi) CID '"iti CD rift) ,....., cin ,....., • .., :.: ri) i.......i i...1, 1,...4 • ..1) cfcl . .,. 11■111 • Illi 0...11 • lit 1 flm 3i • rD CD r-i- PI cr.) a) lima • r-t- ..„ •.-*7-Z,:,,,:.:k';-7. 1-.•-''.;-3.;f:'i-''',,--1,4:'irMt.7-'11 -1'*11' 1 - . -,.•,.,, . I --' . !,•,' .' . ' 44.010 • . • tm•ZI , . , , . : . - - - ,.. . ..,. _. _ , -,,, , .,. ,.. o !'• .... .:z g •,: ' + •-•,- -' '_•si',, --11—"-'' 1 ''': 3. 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If 1 ., lj r 1 i 01 .__ _ _ _ 20 2 Drdgin• T o £I S T---- "- �n _ ._ i 0 z , _ I q ._ __ C13 N i 9 1 Q .tom D i 7 1 2p�6 __-._ _ _._____ _ --�_.— �201 7�� Ding � re g� 5 3 a — / f' ''s.'.l'::iill'-.-,7.., .'',.!::.-, -;..!-_,'.' :_,_ ,_,,,,.:--1 ,,, a✓,._. e �; CD - OS144' {• 1 t L Q )...."14 F �,, ,,p. % £ Y µ ,nom , 7 q � 1.)).....t (:),___A" ..-i-wk-lia• $1,) St-<_< ,-, r-i- ,. .. r) C t. ra - r rt) I�—� ..[� ; . . .--, _ ' r-t- rD 8 : o • < ,„....a • 1 < 4 > . Cm) .. . 1....61 . wl r, 19 February 2010 Molly Edson/Lainie Edwards Florida Department of Environmental Protection Bureau of Beaches and Coastal Systems 3900 Common Wealth Boulevard—Mail Station 300 Tallahassee, Florida 32399-3000 RE: Joint Coastal Permit(JCP)Application for Clam Pass,Collier County Florida. Previous authorization FDEP#0128463-001-JC Dear Ms. Edson & Ms.Edwards: Attached is the response your Request for Additional information (RAI) on the JCP application for the dredging of Clam Pass located in Collier County, Florida. Enclosed please find 1 original set, 2 hard copies and 1 electronic copy of the RAI response. We would just like to emphasize that this application is not asking to change the dredge template or configuration that was previously authorized under FDEP#0128463-001-JC to station 18+00. The dredging and maintenance of Clam Pass is a vital part of the overall management of the estuary and necessary to maintain adequate flushing for the health of the environmental resources. Total linear length is approximately 1800 feet(549 meters). Beach compatible sand will be placed along the Collier County Clam Pass Park Beaches located south of Clam Pass. Non-beach compatible sand will be disposed of at an approved upland location. Please feel free to call me directly at 800-477-7275 if you have any questions or need any additional information. Thanu for all of your assistance and expedience in processing this request. Sincerely, j% / f /,/ Jeffrey'1€1 abar, P.E. Project Director PBS&J Cc: Gary McAlpin,Collier County 5300 W.Cypress St., Suite 200,Tampa,Florida 33607,Phone:800-477-7275,Fax:813-286-1207 CAC November 12,2009 VII-3 Staff Reports 1 of 4 r i. , ';,g, - x fit 5300 West Cypress Street tl s Tampa, Florida 33607 . '' I4 Phone: (800) 477-7275 rf Date: 6 November 2009 Clam Pass Joint Coastal Permit (JCP)Application Status Memo This memo summarizes the activities to date regarding the Clam Pass Joint Coastal Permit Application. The JCP application was submitted to the regulatory agencies in June 2009. The activity requested within the application is the same level of authorization that was granted in the previous permit. The request consists of dredging a portion of Clam Pass and Clam Bay to aid with flushing and improve environmental resources. Tidal flushing maintenance dredging will occur only when science dictates that the need for tidal flushing of Clam Pass and Clam Bay is necessary to assure the health and viability of the estuary. Dredging activity will be consistent with the previous authorization FDEP#0128463-001-JC to station 18+00. Subsequently, requests for additional information (RAI) were received from the United States Army Corps of Engineers(USACE)and Florida Department of Environmental Protection(FDEP). Much of the information requested was unexpected based on previous correspondence and direction provided by regulatory agencies prior to submitting the application (based on the nature of the request to simply re- authorize the previous permit). This additional information is likely a result of the heightened level of local concern that has risen over the application and proposed dredging activity. A meeting was held with FDEP on August 18, 2009 to review the RAI and obtain clear guidance of the level and extent of information required to be submitted (see attached meeting minutes). As a result additional data collection was necessary to respond to the RAls. This information includes: 1) Habitat Survey and Environmental Assessment 2) Geotechnical Investigation o Native Sediment Sampling and Testing o Sediment Core Boring Investigation o Beach Compatibility Analysis 3) Design Configuration and Analysis of Previous Monitoring Data The County provided approval of the above additional data collection tasks on September 10,2009. Data collection was conducted throughout September and October, as well as previous survey data was obtained from others consultants to complete the design configuration analysis. The habitat survey and environmental assessment information was received on October 20, 2009 from Turrell, Hall and Associates and is under review. Results of the geotechnical investigation were received from the lab on November 1, 2009 and presently being analyzed. The survey data necessary to analysis the design configuration was received from Humiston &Moore, Inc. on September 28, 2009 and is under review. Based on the review and analysis of the above information, review from County staff and final response preparation we anticipate submitting a response to the regulatory agencies within 30-45 days. j=� Jeffrey_ *,P.E. P � 'e -- - 1 PBS; CLAM PASS ANNUAL RESTORATION & MANAGEMENT PLAN TIDAL ANALYSIS ELEMENT REPORT NO. 12 April 2012 1.Summary Analysis of tidal data has previously been presented in annual monitoring reports that also included analysis of changes in the bathymetry of the waterway and the beach shoreline. Bathymetric changes in channel shoals and tidal analysis both provide information that is useful in determining when maintenance dredging of the inlet should be considered in order to maintain flushing. Beginning three years ago there was a change in county policy and this tidal analysis is now being provided as a separate report from the bathymetric and beach monitoring. For a history of the comprehensive bathymetric, beach, and tidal monitoring, see "Clam Pass Restoration and Management Plan Bathymetric Monitoring, Reports"#1 through #9, 2000 through 2008, prepared for the Pelican Bay Services District (PBSD) by Humiston & Moore Engineers (H&M). This is the third monitoring report that is limited to the tidal analysis only; for information on bathymetric monitoring refer to the separate County reports. The Clam Pass Restoration and Management Plan was implemented in 1999 to improve flushing of the Clam Bay system and the surrounding 500 acre mangrove preserve. A part of the management plan was to dredge portions of the flood tidal shoal and some of the interior waterways to improve the hydraulic efficiency of the inlet and increase the tidal prism, which is the volume of water exchanged through the inlet on each half tidal cycle. The improved tidal prism means more water goes in and out of Clam Pass on each tidal cycle and this larger volume of water generates stronger currents in the inlet. Those stronger tidal currents are capable of scouring sand from the channel to help keep the inlet open and maintain the flushing improvements. Since the 1999 dredging, as shown in the annual Clam Pass Restoration and Management Plan Reports #1 through #9, implementation of the dredging element of the Clam Bay Restoration and Management Plan has significantly improved tidal exchange throughout the bay system. The maintenance dredging of the flood shoals in January 2002 was shown to be beneficial in maintaining the improved tidal flushing. In order to maintain the improved tidal exchange, based in part on the results of the tidal monitoring, the 2006 monitoring report recommended dredging of the entrance of the pass, and a portion of the flood shoal. That dredging was completed during the winter of 2007. The county has submitted an application to dredge the pass in near future, and an intent to issue the permit has been issued by the state. The limits of the currently proposed dredging are the same as the limits dredged for the 2007 maintenance. The proposed placement of the dredged material, however differs from the 2007 project in two ways. The county is seeking to place fill on both the north and south side of the inlet, along with infilling of the meandering channel entrance on the north side of the entrance dredge cut. The tidal data indicate that some shoaling may have occurred, however, not yet to the extent that preceded the previous maintenance dredging events. If dredging were to take place this year, it would be 5 years since the previous dredging. This is consistent with previous maintenance intervals of 4 to 5 years, and indicates that slightly longer intervals may be feasible without serious potential for inlet closure, yet does not preclude scheduling 1 ____.............,....... ____. a _____ _ EMEmra-,17--....-............ E. .z.` -4 1 •'ITTF- - '‘ -1 T-i.1._j--.7„...4,...,-; , - i r I .. - . --:.---4-,-, *.i - . N.. 4-1-•=4.1,_ :--i-3- ,..:-.-,- - .__ - . i.1.1-1-,TI:t.Tsill--r-tii- - ;,- 4- 't , •4,4,' , I .11111111111133,1=- :: ■ 1 i: C":•:-.7. , , -..- .... 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II / o a A zC m�i��immm •• �flcv •• om •• o ��s - mn aa_ wl �' "-� .� c�l i c� 0 ' -{ Pi cd J nl ^o CO •J a�1 ?iv •AD n.- - , i„..n:.n:,74- . c...f.ca o oo a- _ OnO 0m mU)nlo •. -icn s-:rC[o .. fan: ..n �.:g.:: �• in 0 oiamia clo - amps in as n is ism mm>y wl mmcumi� ma ru�m�n o 1 O 0 0 0 0 o a o 0 o a o a - n a n o - - o 0 0 0 o a 0 o a o a'a 0 0 0 0 o�a a o ..i i � z i' 000 - ooa aoema ___IWIW#1111110111- o wwfara , Dredge Cut Expansion Progression 1999 Original - 2007 Dredge Current Proposal Station # Width Depth (ft.) Width Depth (ft.) Width Depth (ft.) 10+10 120 -4.0 113 -4.0 167 -4.5 10+19 150 -4.0 150 -4.0 198 -4.5 12+00 160 -4.0 140 -4.0 252 -4.5 12+50 150 -4.0 (Not Dredged) 254 -4.5 Note: Stations 7+10 to 13+00 (14 stations) Depth increases from -4.0 ft. to -4.5 ft. Width varies as shown in representative stations above All depths are in NGVD plOUree : CCe,y.-s7 ASS /97",4✓i7 4OedY 3A /, _,/,--;wary ?'7 7. Conclusions and Recommendations The initial dredging of the flood shoals in 1999 and maintenance of the flood shoal channel in 2002 has resulted in significant improvement to the stability of Clam Pass. These improvements to the hydraulic stability of the inlet from the April 1999 dredging have persisted, however,the inlet channel and flood shoal areas have accumulated enough sand so that conditions are similar to those that existed prior to the maintenance dredging completed in January, 2002. Based on the July 2006 survey, there are approximately 12,000 cubic yards of sand within the currently permitted dredging limits. There are approximately 9,400 cubic yards in Segments B and C which were dredged in January 2002. This sand is expected to be beach quality. It has been nearly 5 years since the previous maintenance dredging.Although the tidal data show that flows through the inlet are still significantly stronger than the pre-1999 conditions, and may be sufficient to maintain flushing to the bay for the time being,there are indications that the flow through the inlet has diminished somewhat since the 2002 dredging. In order to reduce the potential for tidal exchange becoming diminished to the point where flushing might be inadequate, a Notice To Proceed to conduct another maintenance dredging has been obtained and dredging is scheduled to be conducted during 2007. Because of erosion along portions of the Clam Pass Park beach south of the inlet, County staff has recently considered the feasibility of obtaining additional sand for nourishment by expanding the dredging to include the inlet ebb shoal. This approach would provide immediate relief to the erosion problem on the park beach, however, it may also potentially have longer term consequences that should be carefully considered. A common impact from dredging significant portions of inlet ebb shoals is increased erosion of adjacent beaches. This occurs for several reasons including; interruption of natural transport which relies on the presence of an ebb shoal to bypass the inlet,diminished protection from waves for areas close to the shoal, and the readjustment of dredge cut slopes to a natural repose angle as the shoal begins to reform by trapping sand from the littoral system. A more detailed discussion of this is included in Section 10 below. In response to concern over the serious impacts that are likely to occur to the beach adjacent to the inlet from removal of the ebb shoal, and at the same time to provide some additional sand for nourishment of the eroded park beach, the entrance to the inlet will be '-'dredged to the 80 feet width which was originally permitted and excavated during earlier maintenance prior to the 1999 improvements. This wider cut was not dredged in 1999 or in 2002, because it has been determined that 8()_1 a significantly wider than the equilibrium channel width supported by tidal flow, and is therefore not necessary to achieve the jpspmyed flushing of am Bay. u ore, the wider cut quickly shoaled in with sand from the beaches immediately adjacent to the inlet. This 80 feet wide cut, however, does not have the potential for the level of serious impacts to adjacent beaches that should be expected from dredging the entire flood shoal,yet it will provide approximately 3,500 additional cubic yards of sand for nourishment. Additionally, careful observation of how the adjacent beaches respond to this relatively small increase in dredging scope may provide useful data regarding potential impacts from more aggressive dredging of the flood shoal. 24 ENVIRONMENTAL SCIENCE _40A1 mitt tiredtionc with Clam Pass: why, when and how much? Nature creates designs with The County requested P.m.cbanm.! curves that constantly change an 80 foot entrance cut, „;,,d,_,.,,i,,. . shape. Humans tend to prefer which makes little sense. `"rti'�-. designs with straight lines that The Pass will try to get stay put. Understandably,these back to its natural width of ,..------v two forces can sometimes corn- around 40 feet.Working pete against each other,when they with nature makes more should work together. sense-dredge a nar- The constant changes to Clam rower template,such as Pass from shifting currents,wind, performed in 2002,which waves and storms contribute to worked just fine. i acr the Pass filling in.Historically,Clam Conservancy of t 1;,,,t i;;,, Pass moved around. It would close Southwest Florida Science up in one area and blowout and Co-Director Kathy Worley id,. .t .i;art. create a new pass in another. Sand advises,"The objective of 1 ' r' sometimes even built up enough inlet maintenance should 4,14,,' 1 �► i,�.< ns+r to create islands(Figures 1 and 2). be to sustain and improve . „ Today,attempts are made to cor- environmental resources.” * - -, } " 1 ral nature and keep Clam Pass in Worley continued, . x . one place. However, nature doesn't "Dredging removes bottom ' always read the memo,so dredg- dwelling creatures,which * i { ing becomes necessary to keep the are an important part of the I o, .."..-t ... Pass open. food chain,along with the , " ` '" The 1999 Clam Bay Restoration sand.While these popula Permit that allowed Clam Pass to tions recover over time ' l ,.. �± be dredged periodically has expired they will not reach their '. f and Collier County has applied for a full potential-especially in Figure 1:Clam Pass area 1953.Note the positions of the new permit.While everyone agrees areas like Clam Pass that items shown by the arrows.Figure 2:Clam Pass area the Pass needs to be kept open, are dredged repeatedly. 1995.Note the changes that have occurred. disagreements have risen on the Therefore,removal of the dredge cut design and when to least amount of sand need- the health of Clam Bay waterways dredge. ed to keep the pass open is better and the mangrove forest are at risk for the overall health of the estuary of impairment.What we want to Clam Pass contains multiple wildlife and not to mention our pocketbooks." prevent is a knee-jerk reaction to provides habitat for marine life. According to the County's permit, dredge based on changes in hydrol- -. the decision of ogy that nature could correct. when to dredge Prior to dredging Clam Pass,ask a is vague and the following questions: ', , ,,, . based on hydro- 1. Is dredging absolutely N :. . logic conditions. necessary to prevent further / n . , , �‘ '. ww-�4 ` Dredging should ecological damage within fix: ` .° w " occur when the the estuary? '' .. ,' .r, "'� '�': water exchange 2. Do benefits of dredging .t.a t ,�• 'I 1 'zit/ *,*- between the Gulf outweigh detriments? .;,� and the Clam Worley summarizes, "Think of 4 , _#, :44' ' , '1' Bay system is three Ls: dredge the least amount IR V* . r M , reduced to the of sand,the least number of times, ` = r k :,„ i ,I', point where for the least cost." \. 13 i r Maximum Velocity,misoc ,.-- -, 0 o 0 - ir_ 1 I I ... 1 1 Cr I --t 01 ...1. 0 .." 4 -I i- 0 . .12 CO•--0 i 0-I. • It MI ::: ■■ a W •-•.S. q.? . . ----- ci, 4 -, ,- -■.=' la F; 20 - . (9) L. ,. a 3 Du I • 1 , •=1., 1 J J i I t--.0 • 0 CD ..---- „, Q ,._...- sa A. I J J I. ' 0 o 0 0 1... CO • ot .1 i J t. 00 , 6 0 , , Of I t. 1 Ca (6) 7 i. .. „. . _ -, , 7 1 E i 1 51 ,' ::' 4. 1 @ S - 7 -1 -r -- --r--- —.:: r- -7 i, r''' Equi)lbriurn Cross Sections ,:' i - - • I f 1 I - / f ' "..'-r 1 4.... '; C..V J. ttf C..;.,... .'; 1 ‘....x s ', 8 i l i , 'I ..a at . . i • from the ebb shoal to the beach south of the inlet in 2005 as evidence that natural bypass that was interrupted by the 1999 dredging has been restored, and the April 2007 shoreline at R-43 was only-6'landward of the 1998 pre-fill position. The monitoring therefore appears to indicate that minimizing the amount of dredging of the ebb shoal and dredge cut across the beach helps preserve natural bypass at the inlet and minimizes potential impacts to the park beach. The park beach width, however, was inadequate in 1998, and remains so today. To further evaluate the potential for using Clam Pass as a sand source for restoring the park beach, the 2007 dredge cut was expanded to the 1999 limits. This provided additional sand for placement on the park beach, and is providing another opportunity to observe beach response to the wider dredging limits. This approach of determining the optimum amount of material that can be obtained from Clam Pass for beach restoration should be evaluated very carefully because a common impact from extensive dredging of inlet ebb shoals, as well as the cumulative impact of regular maintenance dredging, is increased erosion of adjacent beaches. g.,4144,Q .Jvc. fou 20(.7g 2 Clam Pass Restoration and Management Plan. Bathymetric Monitoring Report No.9 Prepared by Humiston and Moore Engineers,November 2008 Selected Excerpts p.2- "...minimizing the amount of dredging of the ebb shoal and dredge cut across the beach helps preserve natural bypass at the inlet and minimizes potential impacts to the park beach." p.6-" ...the inlet width was approximately forty feet wide in the pre-dredging condition of 1998 and 2007...a larger dredge cut is not sustainable as an equilibrium condition due to the limited volume of tidal prism flowing through this inlet."And"The purpose of the narrower cut in 2002 was to avoid post dredging readjustment that has a tendency to erode adjacent beaches." p.8-"The cut width was increased for the 2007 dredging in order to evaluate the potential of using Clam Pass as a source of additional sand for placement on the Clam Pass Park beach. .." p. 10 See discussion of equilibrium conditions p. 13 Re 2002 dredging,which excluded seaward segment of inlet-"Approximately 11,500 cubic yards of sand were dredged....The sand was used to mitigate beach erosion on the county park south of the inlet.To minimize impacts to adjacent beaches,Segment A was not dredged except for a small amount of dredging that was necessary to get the dredge in the inlet. p. 14 "...Approximately 21,000 cubic yards of material were dredged from the Clam Pass between January 22,2007 and April 26,2007. The sand was placed on the beach south of the inlet.This maintenance dredging included a modification,by request of the county,to increase the width of the dredge cut.. . It is anticipated that the increase of the dredge cut at the entrance will have little if any improvement to the tidal flushing of the Clam Pass tidal system, because the wider cut results in a cross section that is larger than the equilibrium section area, and it is therefore expected to fill in quickly.However,the additional sand removed from the pass did allow for more material to be placed on the county park beach just south of the pass,and monitoring of the effects of the wider cut on adjacent beaches may be used in planning future maintenance operations." p. 15 re Tidal Study "Pre-construction tidal data were collected for a full month to obtain average values representative of the general tidal characteristics for Clam Bay,and to establish baseline conditions against which improvements to tidal flow could be measured." p.20 re Shoreline Change- "Over the most recent monitoring interval,the beach stations north and south of the inlet experienced both accretion and erosion.The most serious erosion occurred at R-41 adjacent to the north side of the inlet which lost 45 feet of beach.The beach also eroded at all three monuments on the south side of the inlet but at lower rates...The fact that erosion occurred adjacent to the inlet,and accretion occurred further from the inlet, is an indication that readjustment of the dredged channel back to the equilibrium cross-sectional area was the result of trapping sand from adjacent beaches." p.26 "...the dredge cut was increased from 30 feet to 80 feet for the 2007 dredging. FISH AND WILDLIFE COORDINATION ACT LEGISLATIVE TITLE: Fish and Wildlife Conservation And Water Resource Developments-Coordination UNITED STATES CODE CITATION: 16 U.S.C. 661 et seq. OTHER TITLES AND POPULAR NAMES.: Fish and Wildlife Coordination Act; Coordination Act; FWCA SUMMARY: The purpose of the Act is to recognize the contribution of wildlife resources to the Nation, the increasing public interest and significance thereof due to expansion of our national economy and other factors, and to .provide that wildlife conservation receives equal consideration and be coordinated with other features of water-resources development programs (16 U.S.C. 661). The terms "wildlife" and "wildlife resources", as used in this Act, "include birds, fishes, mammals and all other classes of wild animals and all types of aquatic and land vegetation upon which wildlife is dependent" (16 U.S.C. 666(b)). The Secretary of the Interior, through the U.S. Fish and Wildlife Service (USFWS) is authorized to assist and cooperate with Federal, state and public or private agencies and organizations in the conservation and rehabilitation of wildlife. (The National Marine Fisheries Service (NMFS) provides similar assistance and cooperation for wildlife species under the management responsibilities of the Department of Commerce). 16 U. C. 662(e) p' >°=t. i r_ S aTiat w ie ev-t: the w a t e r s ti\. 8 any stream or other 11-)od y water S3u a k .1�.w,d�.u'4 .f s...7 impounded, diverted, the channel deepened oitherurse ,cytsdriiiroad or modified, the Corps shall consult with Rs]] Ed,Twl VifldRTG Service (FWS), the National Marine Fisheries SerAre OUTS)TS) as appropriate, and the agency administering the viikHige resources o.,j. the state. The consultation shall consider conservation ui wilddiige resources with the view of preventing loss of and damages to such resources as well as providing for development and improvement in connection with such water resources development. Any reports and recommendations of the wildlife agencies shall be included in authorization documents for construction or for modification of projects (16 U.S.C. 662(b)). The Corps shall give full consideration to the reports and recommendations of the wildlife agencies, and include such justifiable means and measures for wildlife mitigation or enhancement as the Corps finds should be adopted to obtain maximum overall project benefits. RESOURCES COVERED: Fish and wildlife and their habitats; the birds, fishes, mammals, and all other classes of wild animals and all types of aquatic and land vegetation upon which wildlife is dependent. (16 U.S.C. 666(b)). COMPLIANCE REQUIREMENTS: The Corps and other Federal agencies involved in water resource are to consult with the FWS and with the agency exercising administration over wildlife resources of the particular state wherein the proposed project is to be constructed or action taken. Corps regulations require that the coordination begin with the initiation of the reconnaissance report phase and continue through feasibility and planning, engineering, and design phases of project development. The district must make the reports and recommendations of these entities an integral part of any report presented to Congress or to any agency or person having authority or power (1) to authorize the construction of water resource development projects or (2) to approve a report on the modification or supplementation of plans for previously authorized projects. Recommendations provided by the FWS in Coordination Act Reports must be specifically addressed in Corps feasibility reports. Specific guidance is provided in sections 7-33 through 35, 7-43, and 7-44 of ER 1105-2-100, Guidance for Conducting Civil Works Planning Studies. Regulatory program: The Corps will consult with the Regional Directors of the USFWS and the NMFS, and the head of the agency responsible for fish and wildlife for the state in which the work is to be performed, _1.7i' :;j ; �'i. tR a Co _s 5 ^G,'` p 6S�' fi� "'rte' �O lZ` f b A O° fie;v ���' cgs 0:."^��) �.i C'i.�:.�f�J �i� V:u \J� �d tl .v ads:��� ����� a 9 ��!J�o � e`;:�=7 a� 4 &vY Y �? [I ➢ '3 .lr i l�s Icf,r 1 < t]� � 9 "L,;i a ✓S�� L u' � �� .� vS J appiic ioH. f ��a N �•��L' �a E h eei— viva ,iii! ti_ „v' ter -- gE From: Ken Humiston Sent: Monday, April 27, 2009 9:30 AM To: Victor Rios (vnrios(amarcocable.com) Cc: Gary McAlpin; Brett Moore; Tim Hall; 'tforcht(acityofmarcoisland.com'; 'murrp2hCa�aol.com'; 'Iarryhideaway(aaol.com'; 'therightperson(amsn.com'; 'apires(awpl-Legal.com'; 'soreysanCa�comcast.nel='; 'djfinlayCa�aol.com' Subject: Clam Bay Flushing Data Mr. Rios, In response to your question at the April 9 CAC meeting regarding availability of data to determine when Clam Pass dredging is needed for flushing, this data is contained in the annual monitoring reports that have been prepared for the Pelican Bay Services District(PBSD)since implementation of the Restoration and Management Plan in 1999. Following is a summary, and I have attached the most recent monitoring report for your convenience. The data which can be used to determine if the inlet needs dredging for flushing are; tide range, tide phase laq, and channel cross section surveys. The 1999 dredging improvements to the inlet and interior channels resulted in an increase in the Outer Clam Bay tide range by more than 50%and smaller yet significant increases were recorded in the tide range of more remote bay areas. This increase in tide range means that a much greater volume of water flows through Clam Pass on each tide cycle, and the increase in tidal energy scours sand out of the inlet thereby reducing dredging requirements.A significant decrease in bay tide range would therefore be an indication that flow through the inlet was being obstructed by shoaling and maintenance dredging should be considered. Phase lag is the time lapse between the occurrence of high or low tide in the Gulf of Mexico and the subsequent occurrence of high or low tide in the bay. Prior to the 1999 dredging the low tide phase lag was approximately 2.5 hours. It may help to visualize the meaning of this by considering that for the first two and a half of hours of rising tide in the Gulf of Mexico, water was still flowing out of Clam Pass. Only when the falling water elevation in the bay equals the rising elevation in the Gulf does slack water occur in the inlet, then it begins flowing from the Gulf into the bay.The 1999 dredging reduced the low tide phase lag by more than 50%to a little more than one hour.The high tide phase lag was reduced by about 40%, from more than 1.5 hours to about one hour. This asymmetric improvement in phase lag is because the dredging resulted in a more significant proportional change in channel cross section of flow near low tide than at high tide, particularly in the most severely shoaled channels, allowing the bay system to drain more completely on ebb tide. To a somewhat lesser extent it fills more completely on flood tide. Decreasing phase lag is another indicator of shoaling that may require dredging. If you look at the tide range and phase lag data, shown in Figures 5, 6, and 7 of the attached report, you will notice there is quite a bit of scatter. There are a number of explanations for this, the most significant of which is probably the relatively short time intervals over which the data were collected in comparison to the longer periodicity of the astronomical mixed tide along this coastline. However, with the existing data base from nine years of monitoring, the variability between short data recording intervals is of less significance when evaluating long term project performance. The short term data are shown in the report illustrations because they are valuable for interpreting changes that occur in response to individual maintenance dredging events and storms. The monitoring scope includes channel cross section surveys which have been used to measure shoaling both for tracking shoaling rates and quantifying the volume of sand for dredging, and beach surveys for evaluation of adjacent beach response to dredging and storms. The substance of the discussion following your question at the CAC meeting was that in the past Clam Pass has been dredged to maintain flushing and as a by product the dredged sand has been used for beach nourishment, and maintenance has been on a regular three year cycle because the county did not have a way to determine when dredging for flushing was necessary. The maintenance program and the permit are intended to maintain flushing,with sand placement on adjacent beaches as a necessary element of inlet management. However, I would like to clarify that although the interval between the 1999 dredging and the 2002 maintenance dredging was 3 years, the next maintenance interval to the 2007 dredging was 5 years. In both cases the dredging schedule was determined under consultation with county staff regarding consideration of both inlet flushing and the need to renourish Clam Pass Park Beach. The first three years of monitoring from 1999 to 2001 showed what appeared to be a trend of gradually increasing low tide phase lag(Fig 6 of the attached report) and decreasing tide range(Fig 7) in Outer Clam Bay.At the same time there was a need for renourishment of the Clam Pass Park Beach, and county staff scheduled the first maintenance dredging for January 2002. The Gulf entrance channel dredging scope was reduced for the 2002 maintenance to reduce potential impacts to sand bypass and potential impacts to the beach. What appeared to be a trend of reduced flushing efficiency in the first three years of monitoring was not as evident in the monitoring data collected following the 2002 maintenance dredging, and it appears as if a maintenance interval of 5 years or longer may be sufficient to maintain flushing. However, due to channel shoaling in amounts approaching those that were dredged in 2002,the 2005 monitoring report recommended initiation of planning for the next maintenance dredging which was scheduled by county staff for 2007.The 2007 dredging also coincided with a need for renourishment of Clam Pass Park Beach, and as described in the monitoring report, the Gulf entrance channel dredging scope was expanded to the maximum existing permitted limits in order to obtain additional sand for beach nourishment. The most cost effective interval for maintenance dredging for flushing appears to be longer than has been the case for beach renourishment. Dredging on a more frequent basis to address beach nourishment needs is not counterproductive to maintaining flushing, however, more extensive or more frequent dredging of the inlet has potential for increasing beach impacts. Both flushing and beach impacts have appropriately been considered when scheduling maintenance dredging in the past, yet there is a limit to the amount of sand that is available from maintenance of this small inlet system. A considerable amount of time and investment has gone into compiling and analyzing nine years of monitoring data by the PBSD.This data is a valuable resource for the ongoing management of Clam Pass and adjacent beaches. Please call me if you have any questions regarding this or the attached report. It is a large file and I will send the report appendices in a separate transmittal. Kenneth K. Humiston, P.E. Humiston & Moore Engineers 5679 Strand Court Naples Florida 34110 239-594-2021 Email: mailto:kh @humistonandmoore.com Web Site: http://www.humistonandmoore.com #i4030 Boy Scout Blvd.,Suite 700 ll, 9 Tampa,FL 70001 Phone:800.477.7275 Date:7 September 2010 Clam Pass Flushing Efficiency and Cross-Section Memorandum PBS&J performed volume change,cross sectional and differential contour analysis on Clam Pass utilizing the bathymet is monitoring data collected from 1998 to 20 09 by Humiston&Moore and ABB Surveying. The project area was broken into five segments for the analysis as shown in Figure 1 (north beach,south beach,Pass:A,B and C).The analysis of the data indicates the beaches north and south of the pass showed small reductions in volume following dredging events and recovery to pre-dredge volumes . within 1-2 years. The timeframe for the segments inside the pass to reach pm-dredge volumes were as follows: • Segment A(mouth of pass)fills in within a year, • Segment B(throat of pass)fills in within 1-2 years • Segment C(flood shoal)fills in within 3-5 yeasts. In addition,the ability to convey water to maintain adequate flushing is severely diminished when any of the three segments have reached a critical cross sectional threshold. Indicators or triggers of these critical cross sectional thresholds were determined to be for Segments A&B approximately 200 square feet and Segment C approximately 300 square feet. In summary,the analyses demonstrated that Clam Pass can continue to be dredged at a similar frequency and template designated by the previous permit. The beach compatible sand can be placed on the beach south of the pass with minimal impacts to the stability of the surrounding shorelines. ? - I fdry J R.Tabu,P.E. Project Director . .... - MEMORANDUIVl -�' DATE: 18 October 2010 TO: Steve Feldhaus,Esquire oisen Jim Hoppensteadt associates, inc. C. Coasta'.Engineering FROM: Erik J. Olsen,P.E. `� RE: Clam Pass—Future Channel Maintenance Dredging Triggers For purposes of our next meeting scheduled for October 20th in Naples, I would like to re-summarize my opinions and recommendations regarding potential permit terms which would seek to address "triggers" for Clam Pass channel maintenance. Based upon the history of the Pass, prior maintenance projects and subsequent annual monitoring of the Clam Pass estuarine system, there would appear to be two (2)types of"trigger"or condition which could warrant the initiation of channel maintenance operations by the County. Theses would include the following: 1) Conditions documented by annual physical monitoring which depict a diminishing rate of flushing of the Clam Bay system as determined by reduced tidal range and/or increased tidal phase lag. The latter indicators have to date proven to be a reliable indicator of flushing efficiency, and 2) A documented reduction in the minimum equilibrium cross-sectional area of the Clam Pass inlet throat--as appropriately defined for such a purpose. Pragmatically, one has every reason to believe that absent storm related impacts to the Pass, the above two (2) triggers should be directly related. Conversely, given a documented persistent shoaling of the Pass entrance due to the occurrence of a major storm event, the second trigger would constitute a more reactive measure for addressing rapid and apparent diminishment of estuarine flushing via a permitted channel maintenance program. olsen associates, inc. 1 2618 Herschel Street I Jacksonville, FL 32204 1 904.387.6114 I FAX 904.384 7368 www.oisen-associates.com. Monitoring--Clam Pass Restoration and Management Plan The ongoing tidal analysis monitoring program (Humiston & Moore, 2010, now in its eleventh year') clearly constitutes the best long-term benchmark for the characterization of flushing within the Clam Bay estuarine system. In my opinion it provides the best guide for potential routine scheduled maintenance of the Clam Pass inlet channel. Accordingly, the continued monitoring of this important characterization of the system flushing should be required as a JC Permit Condition. It is assumed that the related mangrove monitoring program should likewise be addressed by permit but I will leave the discussion and justification of such a recommendation to others. Inlet Cross-Sectional Evaluation Presently, the only potential trigger for the initiation of Clam Pass channel maintenance proffered by Collier County is that as described by a PBS&J Memorandum of 7 September 2010 prepared by Jeff Tabor, P.E. Philosophically, I have no objection to the use of the inlet cross- section as a potential indicator of a potential condition which could warrant a maintenance operation —particularly after some form of storm event which induces abnormal shoaling (or even closure) of the pass throat. If an inlet cross-section condition is to be codified by Permit terms as an appropriate trigger(as with tide range as described above)then it should be done in conformance with the accepted"science"related to same. The stability of a tidal inlet such as Clam Pass is dependent upon the existence of a critical minimum cross-sectional area within the inlet throat. The simple,yet amazingly reliable, empirical relationship between the minimum throat area of a tidal inlet and the resultant tidal prism within the bay, lagoon or other waterbody served by the inlet, was discovered by M.P. O'Brien in the 1930's. Based upon both theory and the monitoring work performed principally by Humiston and Moore, the critical cross-sectional area would occur within what is described by them as Channel Segment No. 2. More specifically the segment of inlet throat within which the empirical relationship would be expected to be valid would be from STA. 3+65, to STA. 6+10, mol. It would not apply to either Segment `A' (the ebb tidal platform) or Segment `C' (inner tidal channels)as proposed by PBS&J. 1 Humiston and Moore Engineers,"Clam Pass Restoration and Management Plan, Tidal Analysis Report No. 11", September 2010 -2 - olsen associates, inc. In my judgment and experience, only one channel segment should therefore be considered as a potential "trigger"for future maintenance dredging, i.e., Segment B (STA 3+65— STA 6+10). It would not be appropriate to utilize either Segment A or C as a location for triggering such an event. Barring complete or effectively complete(say 50%)closure of the inlet throat, it will need to be assured that if the permitted minimum cross-sectional area(of 200-sf)is experienced within the channel segment of interest, it should be documented that the trigger condition exists for a minimum of 30-days. This is due to the probability that the minimum cross-sectional area may be re-established naturally during a spring tide—after temporal shoaling to a value below its theoretical minimum"critical"area—probably by a storm event. Once a Notice-To-Proceed has been received (from the FDEP)to perform a maintenance dredging operation pursuant to the permitted design,the full-length of shoaled channel should(or can) be addressed. Since it was a topic of discussion at the meeting on 8 September 2010, I would note that the historical design dredge depths,as documented by H.&M.Monitoring Report No. 8 are as follows: Location Depth STA 0—STA 3+64.5 -5.5 ft NGVD29 STA 3+65—STA 6+60 -4.5 ft NGVD29 STA 6+65—STA 35+37 -4.0 ft NGVD29 In my judgment these depths continue to be reasonable based upon existing conditions in 2010 and the operational limitations of a small dredge to be used for the prescribed work. RECOMMENDATIONS My recommendations for Permit Terms would include the following: • Tidal Range & Phase Lag—A viable planning tool for the justification of scheduled channel maintenance is the documentation of diminishment of tidal range and phase lag in accordance with the continuation of the long-term monitoring program performed for that express purpose over the last eleven(11)years. • Minimum Cross Sectional Area — Only the channel segment — STA 3+65 through STA 6+10 (as defined by the H.&M. baseline)should be considered for measurement -3 - oisen associates, inc. as a potential trigger for initiating maintenance dredging on a reactive basis. The recommended minimum cross-sectional area of 200-sf (NGVD29) appears reasonable,however,it should be documented that minor deviations below the critical area persist for a minimum of 30-days(to include at least one spring tide event). • Channel Segments A and C (as suggested by PBS&J) should not be considered as potential candidates for triggering a maintenance dredging event. • The Permit drawings show varying cross-sections throughout the channel with side slopes of 1:1. I would strongly recommend that the contract specifications not allow the contractor to swing the cutterhead beyond the specified channel bottom dimensional width. This will preclude box-cutting beyond the channel cross- sectional required to achieve a side slope. The latter could be impactive to mangrove. That is to say,the effective dredge width of swing should be tightly constrained. • I would strongly recommend that a "mitigation" element or Mitigation Plan be a Permit Condition for purposes of protecting buildings and infrastructure located on the abutting north shore of the Pass. Of concern would be sediment losses from that beach should a major storm event closely follow maintenance dredging. Infilling of the Pass after maintenance dredging will occur from sand mobilized from along the two (2) flanking gulf-front shorelines. Since the historical meander channel typically lies seaward of the northernmost property,the infilling process (and potential erosion) will be expected to be accentuated at that location. This will necessitate its identification as a potential fill site in the Joint Coastal Permit. • I concur with the proposed design dredging depths which vary between -5.5 ft NGVD29 and-4.0 ft NGVD29,depending upon location along the channel baseline. • Any modification of the Permit(as ultimately issued)should not be considered for any additional excavation of the ebb tidal shoal at this location beyond that presently under consideration. Such a proposition should necessitate a new application and separate permits from both the State and Federal regulatory agencies. -4- olsen associates, inc. • OTHER • I would suggest that the Foundation be a part of the Notice-to-Proceed process which is expected to be codified as a permit condition by FDEP. If I can provide any further elaboration or clarification regarding these matters,please let me know. Thank you. -5 - olsen associates, inc. June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Correspondence submitted by Linda Roth at meeting Page 1 of 11 Dear PBSD Clam Bay Subcommittee Members, The County repeatedly stated to the regulatory agencies that its proposed dredge template is identical to the previously authorized templates. (Please see the attached substantiating documents). The current Clam Pass dredging template proposed by the County is not identical to the previously authorized permits. (Please see the attached maps). The County's 2007 template is a combination of the 1998 FDEP authorized template, and the 1999 USACE authorized template. This expanded dredge template went unnoticed by the regulatory agencies in 2007, and seemed to have set a new precedence. Now the County is again trying to expand the 2007 dredge template by increasing the dimensions(width and depth)of a number of stations(locations). Please see the attached "Dredge Cut Expansion Progression"table). If this expansion is unnoticed by the regulatory agencies, another new precedence will be set. In the future,the County can again refer to the next dredge as just like the previously approved template, even if they make extensive enlargements. MAG as well as other concerned citizens is trying to stop the County from keep enlarging the dredge templates. Please also bear in mind that this is a long term 10-year dredging permit. I hope you will continue to support the actions MAG is taking to improve the County's permit application. Thank you for your kind attention. Linda Roth 6/4/12 P.S. Regulatory agencies function on an "Honor System". They do not have the staff or time to check every detail of all permits submitted to them for approval. June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Correspondence submitted by Linda Roth at meeting Page 2 of 11 19 February 2010 Molly Edson/Lainie Edwards Florida Department of Environmental Protection Bureau of Beaches and Coastal Systems 3900 Common Wealth Boulevard—Mail Station 300 Tallahassee,Florida 32399-3000 RE: Joint Coastal Permit(JCP)Application for Clam Pass,Collier County Florida. Previous authorization FDEP#*0128463-001-JC Dear Ms.Edson&Ms.Edwards: Attached is the response your Request for Additional information (RAI) on the JCP application for the dredging of Clam Pass located in Collier County, Florida. Enclosed please find 1 original set, 2 hard copies and 1 electronic copy of the RAI response. We would just like to emphasize that this application is not asking to change the dredge template or configuration that was previously authorized under FDEP#0128463-001-JC to station 18+00. The dredging and maintenance of Clam Pass is a vital part of the overall management of the estuary and necessary to maintain adequate flushing for the health of the environmental resources. Total linear length is approximately 1800 feet(549 meters).Beach compatible sand will be placed along the Collier County Clam Pass Park Beaches located south of Clam Pass.Non-beach compatible sand will be disposed of at an approved upland location. Please feel free to call me directly at 800-477-7275 if you have any questions or need any additional information. Thank you for all of your assistance and expedience in processing this request. Sincerely, Jeffrey R.Tabar,P.E. Project Director PBS&J Cc:Gary McAlpin,Collier County 5300W.Cypress St,Suite 200,Tampa,Florida 33607,Phone:800-477-7275,Fax:813-286-1207 June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Correspondence submitted by Linda Roth at meeting Page 3 of 11 PBSJ Narrative Response to USACE RAI #2 (SAJ-1996-02789) rouowing receipt of tnis nhi a working group was aeveloped between Collier County and Pelican Bay Foundation including technical, coastal policy and management professionals. The purpose of the working group was to provide an open forum to encourage dialog between the parties regarding the proposed dredging activity and JCP application. As a result several recommendations were agreed upon: • The purpose of the dredging through the pass is to allow for increased tidal flushing to enhance the health of the overall system. The proposed dredging is not intended for navigation. • Periodic dredging of Clam Pass is "triggered" to occur when the average cross sectional area within the active portion of dredge template is consistently below 200 ft2 (2007. Humiston & Moore Monitoring Report). Tidal prism and phase lag will also be monitored and used as indicators of when dredging is required. Monitoring and maintenance of the pass will be initiated by cooperative agreement between Collier County and Pelican Bay. • The proposed activity has been revised to include a northern fill area and filling of the old/existing pass channel. 1. By letter and/or email, 28 parties who identified themselves as residents of the Pelican Bay residential community and their attorney (Robert Diffenderfer of Lewis, Longman and Walker) provided comments as follows: a) 27 parties expressed concerns regarding impacts to aquatic resources associated with the dredging activities; b) 15 parties expressed concerns about increased motorboat access to Clam Pass/Clam Bay as a result of the dredging activities; c) 7 parties expressed concerns about policy aspects of the proposed work regarding the designated conservation area, and purported inconsistencies with respect to Collier County and the project purpose. a) A June 14, 2010 seagrass assessment by Pi3S&J, USAGE, ano Mark Sramek of the National Marine Fisheries Service (NMFS) determined that no Thalassia testudinum occurs within the dredge template footprint as previously reported by Turrell Hall in 2009. There will be no direct impacts to seagrass within the dredge footprint. Additionally, Collier County will conduct a seagrass survey within the proposed dredge footprint prior to each future dredging event. b) Only 1,800 linear feet (total dredge footprint is 2.83 acres) of the entire 500+ acre Clam Bay estuary are being dredged. The purpose of the dredging through the pass is to allow for increased tidal flushing to enhance the health of the overall system. Currently, small boats can access Clam Bay at certain elevated stages of the tide, but local knowledge is required due the shallow nature of the system. Increased boat traffic is not expected as a result of dredging the pass. c) The e dred e temJlat r guestedr is identical to that authorized under-FDEP Permit No ©1 2 8463-001-JC and USACE Permit No. 199602789 115-t . t'iease see the attached PPP IT3rawings tfiaf show dredge template control points used during the most recent 2007 dredging. These control points used by PBS&J were taken directly from the permit drawings authorized by FDEP and USACE (See PBS&J Sheet 01, and Humiston and Moore 2007 Project Site Plan). No additional dredge area is being requested outside of what was previously authorized and constructed. 1. June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Correspondence submitted by Linda Roth at meeting Page 4 of 11 PBSJ Narrative Response to FWC RAI#1 (File No. 11-012846-003) Following receipt of this RAi a working group was developed between Collier County and Pelican Bay Foundation including technical, coastal policy and management professionals. The purpose of the working group was to provide an open forum to encourage dialog between the parties regarding the proposed dredging activity and JCP application. As a result several recommendations were agreed upon: • The purpose of the dredging through the pass is to allow for increased tidal flushing to enhance the health of the overall system when found to be warranted. The proposed dredging is not intended for navigation. • Periodic dredging of Clam Pass is "triggered" to occur when the average cross sectional area within the active portion of dredge template is consistently below 200 ft2 (2007, Humiston & Moore Monitoring Report). Tidal prism and phase lag will also be monitored and used as indicators of when dredging may be required in the future. Monitoring and maintenance of the pass will be initiated by cooperative agreement between Collier County and Pelican Bay. • The proposed activity has been revised to include a northern fill area and filling of the old/existing pass channel. 1. The plans provided were scanned in black and white rendering them illegible. Please have the applicant provide a color copy or a legible black and white copy of the plans to this office for review. The permit drawings have been included as an attachment in Item#1, Please note that all elevations are referenced to NAVD 88. Please note that the dredge t mplate is identical to ..—� that authorized by FDEP for construction in 2007. 2. Please provide this office with the most current version of the permit for review. A PDF has been included as an attachment in Item #2. All of the previous permits and modifications issued by both FDEP (0128463-001.JC) and USACE (199602789-IP-CC) are included. 3. Are there existing or proposed pipes and/or culverts that are submerged or partially submerged, accessible to manatees during any tidal phase, and larger than 8 inches in diameter but smaller than 8 feet in diameter at the site? If so, are they retrofitted with manatee exclusion grating? There are no proposed pipes or culverts located within the project area. 4. Will submerged aquatic vegetation (SAV) be adversely impacted by the proposal? Provide information as to how this determination is made. This information should include a description of how presence/absence was determined, as well as a quantification of potential SAV loss (square footage). SAV reconnaissance and surveys should be non-destructive and consistent with the draft Florida Fish and Wildlife Conservation Commission survey protocols. Surveys should include a map depicting the location of SAV, transects, and percent coverage of all species. A seagrass assessment was conducted by uitell, Bali &Associates in August 2009 ano is provided as an attachment in Item#4. In 2009, eight shoots of Turtle Grass, (Thalassia testudinum), (less than 1% coverage) were identified within the dredge footprint. The inside of the pass was surveyed by snorkelers and quadrats used where resources were observed. A 1 June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Correspondence submitted by Linda Roth at meeting . . Page 5 of 11 PBS&J Response to USFWS RAI-June 15,2010(Received bv email from LimdmEUlicwtt— USACE) Following receipt of this RAI a working group was deYeloped between Collier Count\ and Pelican Bay Foundation including technical.coastal policy, and management professionals. The purpose of the working group was to provide an open forum to encourage dialog between the panics regarding the proposed dredging activity and JCl' application. As a result several recommendations were agreed upon: • The purpose of the dredging through the pass is to allow for increased tidal flushing to enhance the health of the overall system when found to he warranted. The proposed dredging is not intended for navigation. • Periodic dredging of Clam Pass is"triggered-to occur when the average cross sectional area within the active portion of dredge template is consistently below 200 It'C007. Homismn6L Moore Monitoring Report). Tidal prism and phase lag will also hc monitored and used as indicators of hen dredging ma be required in the future. Monitoring and maintenance of the pass will be initiated by cooperative agreement between Collier Count) and Pelican Hay. • The proposed activity has been revised to include a northern fill area and tilling of the old/existing pass channel. {) Provide a figure(s)outlining the entire dredging template, pipeline corridor(s),stockpile cell, beach access corridor(s), shoreline fill template,placement of silt fencing and turbidity curtains, etc. Please see provided permit drawings in |tun#}. Thexe are the drawings provided wFDE|` through the.ICP application. 2) Provide a complete and detailed project description including equipment,vehicles, methodology,etc. Will any equipment be stored or placed on the shoreline? Will vehicles travel along any portion of the shoreline? Dredging will occur within thc ro,iouaJredc* footprint authorized the FDEP(Pcnnit # ----�^ i Thr��Jmdge an. teintate on the permit .rawings are taken directly from 1è e previously umhuriodpcnnit drawings h~ MEP and USACE. (See sheets in Item 42). As with previous dredge events, a combination of mechanical and hydraulic dredging will he used. Hydraulic dredges must have 2''3' of water in order to operate. Shoaled areas that are too shallow for h\drautic dredging will kccxcx`uted by mechanical means. During hydraulic dredging. the discharge pipeline will be confined to the area within the dredge template and the pipeline corridor as shown on the attached drawings in Item#1. Beach compatible dredge material will be used to fill in the existing channel outside the dredge template houndar and remaining materials will he placed. based on local conditions and areas of greatest nccd, in the following areas: |>north or the pass on the beach from R-39+700 to R-4i north of the inlet and/or 2)placed souh of the inlet from R- 41 to K-44+ 100. The most recent oun,e! data will be used to indicate where nourishment is needed the most. Turhidit curtains will he used around the barge when working. Silt fences will be constructed around the stockpile location and around the landward portion of the beach fill template. F he length olconstruction is estimated to be approximately 3 - 6 months. Construction equipment will he staged on the beach near the stockpile location and above the o , 0 CO C 0 y f=1 0 0) _-) 8 a) co ld I ...- (1i �` m F 23,to c C 2 'er m 51- 11 E IL0 N 0 w r`t o� no m f r E c 1 , g J ct . . , ,f a- I U3 0 .,...-.4.4.44. -m E ma i k E o •O r �' -1 3 . 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Width Depth (ft.) Width Depth (ft.) 10+10 120 -4.0 113 -4.0 167 -4.5 10+19 150 -4.0 150 -4.0 198 -4.5 12+00 160 -4.0 140 -4.0 252 -4.5 12+50 150 -4.0 (Not Dredged) 254 -4.5 Note: Stations 7+10 to 13+00 (14 stations) Depth increases from -4.0 ft. to -4.5 ft. Width vanes as shown in representative stations above All depths are in NGVD c a) a) E tu a m c a� 2 T a a • • E 4....) 7 o t0 U t • ._, ^ O Q m N (1.) C O p N (i) u)▪ 2 H 0 a• (1 U m = U C2 H IIcp O Clusl) E 92 be U a Ct lid U ICII Ci) T• N m• m e m m CA CD Twminq 5 92 N oilit v••- Ct N N N 2 O 1.11111111114 • (6 -, Ud it tle CA O 5 U U ct 4_, ,.....4 1...) ,,, © • '...., U m I) N 1, .2 trj ;...q r....i 0 Tr,9 oQ � O fi A CI) � * ir4 a)C:4 U C O O caq U F- 4a 4) Ci) +j C� 1mi H O Q C„ U *• CU . 2 75 4- ;..4 .4-J @a 1-- ;--4 C75 4 0 . u 75 '� N ° N a '4-4 • ,..q I O � � � 4 o o ova O • v•—i ,-(j c:D 'd Ct 4) c� 4) A Ti cn bt N . r..4 • r-i O d-+ . '- Ct b� 00 O CID 14E5' u 4-J r- ± r.. 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I > 1 U C //1 • a � = N V/ d' `� C O (06 •- • N E• �• d = G1 c� 0 J.U .:.... m• cr, E � E• 0 N 0 N N `i/ • w o VJ w• E U a v (l.) iNEIB a cg: c,r) Fuzz 1....) Icl_i © c...) ± (:), 1) •,. . C/r) T-7, C'r) Ct ci...) en r.... E.---, .1.._) ci v__ O 4...) June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Kathy Worley comments regarding dredging submitted by Marcia Cravens Page 1 of 2 Selected Excerpts of Kathy Worley,Director of Environmental Science Conservancy of Southwest Florida Comments Presented at the ACOE meeting April 2012 -(provided to PBSD's Clam Bay Committee on 6/4/12 with emphasis added by Marcia Cravens) All are aware that mangroves deserve special protection as they serve multiple ecological functions including an ecological role as habitat for many species that are threatened, endangered or of special concern. This is stated in numerous scientific papers including the Multi-species Recovery Plan for South Florida(copy provided to ACOE). This document includes lists of species that are found in and rely on mangrove systems which in the interest of time I did not comment on but can be found in the mangrove section of the Recovery Plan. The Recovery Plan does state that the two main human causes of damage to mangrove communities is coastal urbanization, which includes dredging and altered hydrology, which is also supported by numerous scientific articles. Clam Bay has seen damage from both of these human induced causes. The Conservancy performed a benthic study throughout the Clam Bay system. A pdf of the entire study was provided to ACOE. The objectives of the study were to perform comprehensive mapping of benthic habitat distributions in Clam Bay; analyze benthic habitat compositions relative to the geographic location; and to perform a visual survey of any benthic species utilizing mangrove prop roots. Systematic benthic sampling was used to characterize sediments and biological assemblages and their distribution within the Clam Bay system. Maps showing the distributions of these assemblages are including in the report. In the summer of 2010, 872 benthic sample sites within Clam Bay were investigated. We know that substrate is one of the most important abiotic factors influencing the spatial and temporal distribution of estuarine benthic communities. Mud was the dominant substrate in the northern and southern portions of Clam Bay. We also know that flora components of an estuary that are important. Shoal grass was the most prevalent species found during this survey. Previous seagrass studies suggest that the spatial distribution seagrasses in Clam Bay has persisted over the last 30 years, albeit seagrass species and extent of coverage have changed throughout the years. Seagrasses are not static in location,type or extent over the years in Clam Bay. One thing that does concern me is the dredging template(in my opinion)comes to close to the known area of seagrass extent in the northeast sector of Lower Clam Bay. Given that seagrasses have declined in this system and that in all likelihood are stressed given the amount of epiphytic growth that has been documented on the blades,we should go out of our way to protect what is left. So it would be wise to reduce the dredge footprint near the seagrass beds in the northeast sector of Lower Clam Bay to avoid sedimentation on nearby beds. The currently proposed dredge design extends right up to the beds in this area,where a buffer zone should exist between the dredging template and the seagrasses in order to protect them from disturbance and stress. (See maps of historical and current seagrass extent over the years Figs. 18 and 19 in the benthic report provided). We also know that the distribution of oyster reefs has decreased within the Clam Bay system, more than likely a result of dredging or clearing activities in the tributaries. We all know that dredging basically destroys the benthic community within the dredge template; after all you are removing this community when you dredge.Now these June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Kathy Worley comments regarding dredging submitted by Marcia Cravens Page 2 of 2 communities do rebound, but since the same area is being repeatedly dredged over the years the benthic community never truly recovers. Due to the importance of the benthic community it only makes sense that we dredge the least amount necessary to keep the pass functional,while doing the least amount of damage to the flora and faunal communities. Since the pass naturally returns to—40 ft wide why not make the cut less than 80ft as proposed and lessen the impact to other ecologically important components of the estuary. Using a smaller dredge the pass has been maintained at a width closer to 40 ft so it can be done. r June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Correspondence regarding fish survey data in 1995 submitted by Marcia Cravens Page 1 of 4 3. SUMMER FISH SAMPLING-AUGUST 1994 Common Name Scientific Name Bay anchovy Anchoa mitchilli Silver jenny Eucinostrornus spp. • Pinfish Lagodon rhomboides Atlantic needlefish Strongylura marina Great barracuda Sphyraena barracuda Leatherjacket Oiigoples saurus Inshore Iizardfsh Synodus foetens Blue crab CalNnecds sapidus Gray snapper Lunus griseus Gulf killifish Fundulus grand's Spotted seatrout Cynoscion nebulosus Snook Centropomus spp. Mutton snapper Lutjanus analfs Permit Trachinotus falcatus Pigfish Orthopr stun chrysoptera Grunt spp. Mullet app. Muggy app. Killfish spp. Fundulus spp. Spot Lekstomus xanthurus 4-36 June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Correspondence regarding fish survey data in 1995 submitted by Marcia Cravens - Page 2 of 4 4. WINTER ASH SAMPLING-DECEMBER 1994 Gammon Name Scientific)lame Sheepshead minnow Cyprinodon variegatus Longnose killifish Fundulus similis Gulf killifish Fundulus grandis Pinfish Lagodon rhomboides Spotfin mojara Euanostomus argenteus Silver jenny Euanostomus gula Tidewater silverside Menidia berylfna Snook Centropomus undeamalis Mutton snapper Lutjanus snails Mangrove snapper Lutjanus gniseus Flounder Paralahthys albigutta Sea robin Prionotus sc itulus Inshore lizardfish Synodus foetens Whiting Mention us littorals Mullet Mugs app. Saiifcn molly PbedNa fatiplinns Barracuda Sphyraena banacuda Spotted seatrout Cynoscion nebulosus Spot Leiostomus xanthurus Pipefish Syngnathus spp. Sand perch Drplactrum bivittatum Triggerfish Babes capriscus Scaled sardine Harengula pensacolae Puffer Sphoerokles parvus Cowrish Acanthostracion quadrioomis Needlefish Strongylura marina Sheepshead Archosargus probatocephal 4-37 June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Correspondence regarding fish survey data in 1995 submitted by Marcia Cravens Page 3 of 4 N I 0 200 400 800 a } , SCALE 1"-400'-0" I 444mossamwg. 1. 7-: --' PELICAN BAY re _ BOARDWALK Q MANGROVES avaw • Y r .. �,,a, .1 MANGROVES MANGROVES PraTit •-M O :3 a' . swpu�e;� .a,. . .Faca�ra -- -- axro--_a ,+.!w . .ix_ —_ ` _'- a,.. ^.+e , _ - --- .., a _. .:: OUTS COLLIER COUNTY • CLAM BAY.. MANGROVES BOARDWALK � c� Turret' & Associates, Inc. - Marine B Environmental Consulting 3584 Exchange Ave. Suite 8, Naples, Fl. 33942 CLAM PASS SUMMER FISH SUMMER FISH SAMPLING STATIONS DESIGNE0 T.T.T. REVISION DWG.NAME 937OSIA4 SAMPLING LOCATIONS DRAWN W.M.B. 747/95 SHEET a OF 12 DATE 1/25/95 SCALE r.400" .108 NO. 9370.5 SEC. TWP. RGE. June 4,2012 Clam Bay Subcommittee of the Pelican Bay Services Division Board Correspondence regarding fish survey data in 1995 submitted by Marcia Cravens Page 4 of 4 N 0 200 400 800 ....■ .1.11 mormi■ F J, SCALE 1"m400•-0" = ice.. immovssicW"iiii. PELICAN BAY BOARDWALK ,,�� Q \ MANGROVES :n._� - w.m anoogi S .< mvs r -- tit_ - ■ 0 MANGROVES `am R - MANGROVES 1-3\a„, ryas C.,'asts"f � aFl,i 11, COLLIER COUNTY ti`CLAM BAY BOARDWALK - MANGROVES )� i'±!� Turrell & Associates, Inc. gi r.i t Marine & Environmental Consulting 3684 Exchange Ave. Suite B, Naples, TI. 33942 CLAM PASS WINTER FISH WINTER FISH SAMPLING STATIONS DESIGNED T.T.T. REVISION DWG.NAME 9370WIN SAMPLING LOCATIONS DRAWN W.MB. 711719E SHEET 9 OF 12 BATE 1125195 SCALE r.400- . JOB NO. 9370.5 SEC. Tell'. ROE.