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CAC Agenda 06/09/2011 R CAC REGULAR MEETING AGENDA JUNE 9,2011 June 9, 2011 Meeting Agenda and Notice COASTAL ADVISORY COMMITTEE (CAC) THURSDAY, JUNE 9, 2011 - 1:00 P.M. BOARD OF COUNTY COMMISSIONERS CHAMBERS THIRD FLOOR, COllIER COUNTY GOVERNMENT CENTER 3299 TAMIAMI TRAIL EAST, NAPLES -Sunshine Law on Agenda Questions -PUBLIC NOTICE I. Call to Order II. Pledge of Allegiance III. Roll Call IV. Changes and Approval of Agenda V. Public Comments VI. Approval of CAe Minutes * 1. May 12. 2011 VII. Staff Reports 1. Expanded Revenue Report 2. Project Cost Report VIII. New Business 1. Conceptual Design Update CP&E - Vanderbilt. Park Shore and Naples Beaches 2. H&M - Inlets Annual Monitoring 3. Conceptual Design Update-Coastal Engineering-Marco South Beaches IX. Old Business X. Announcements XI. Committee Member Discussion XII. Next Meeting Date/Location August 11, 2011 Government Center, 3rd Floor XIII. Adjournment *Any person in need of a verbatim record of the meeting may request a copy of the recording from the Collier County Communications and Customer Relations Department or, if televised, view the video online at www.colliergov.net All interested parties are invited to attend! and to register to speak and to submit their objections, if any! in writing! to the board prior to the meeting if applicable. For more information! please contact Gail D. Hambright at (239) 252-2966. If you are a person with a disability who needs any accommodation in order to participate in this proceeding! you are entitled, at no cost to you! to the provision of certain assistance. Please ,contact the Collier County Facilities Management Department located at 3301 East Tamiami Trail! Naples! FL 34112! (239) 252-8380. Public comments will be limited to 3 minutes unless the Chairman grants permission for additional time. Collier County Ordinance No. 99-22 requires that all lobbyists shall! before engaging in any lobbying activities (including, but not limited to! addressing the Board of County Commissioners) before the Board of County Commissioners and its advisory boards! register with the Clerk to the Board at the Board Minutes and Records Department. CAC June 9. 2011 VI-1 Approval afCAC Minutes 1 af6 MINUTES OF THE MEETING OF THE COLLIER COUNTY COASTAL ADVISORY COMMITTEE Naples, Florida, May 12,2011 LET IT BE REMEMBERED, that the Collier County Coastal Advisory Committee, in and for the County of Collier, having conducted business Herein, met on this date at 1 :00 P.M. in REGULAR SESSION at Administrative Building "F", 3rd Floor, Collier County Government Complex Naples, Florida with the following members present: CHAIRMAN: John Sorey, III VICE CHAIRMAN: Anthony Pires Randy Moity Jim Burke Murray Hendel Robert Raymond Joseph A. Moreland Victor Rios Wayne Waldack (Excused) ALSO PRESENT: Gary McAlpin, Director, Coastal Zone Management Colleen Greene, Assistant County Attorney Gail Hambright, Accountant Dr. Michael Bauer, City of Naples CAC June 9. 2011 VI-1 Approval of CAC Minutes 2of6 Any persons in need oftlte verbatim record oftlte meeting may request a copy oftlte video recording from the Collier County Communications and Customer Relations Department or view online. I. Call to Order Chairman Sorey called the meeting to order at 1 :02 PM n. Pledge of Allegiance The Pledge of Allegiance was recited. m. Roll Call Roll call was taken and a quorum was established. IV. Changes and Approval of Agenda Gary McAlpin, Director, Coastal Zone Management Mr. Rios moved to approve tlte Agenda. Second by Mr. Moreland. Carried unanimously 8 - O. V. Public Comments None VI. Approval of CAC Minutes 1. April 14, 2011 Mr. Raymond moved to approve tlte minutes of the April 14, 2011 Meeting. Second by Mr. Burke. Carried unanimously 8- O. VIT. Staff Reports 1. Expanded Revenue Report - Gary McAlpin The Committee reviewed the "Tourist Tax Revenue Report - FY 201 0 - 2011" updated through April 2011. 2. Project Cost Report - Gary McAlpin The Committee reviewed the "FY 20]0120]] TDC Category "A" Beach Maintenance Projects" updated through May 6, 2011. 3. Backup Tallahassee Report Gary McAlpin provided the following documents for information purposes: . Letter to Hershel T. Vinyard, Secretary, Florida Department of Environmental Protection dated AprilS, 2011 - Re: "Collier County FDEP Pennitting Discussion. " . Emai1 string between himself and Jeff Littlejohn, Florida Department of Environmental Protection dated April 29, 2011 - Subject: "WJP J Channel Dimension Comparison. " . Letter to Mike Bamett, Bureau Chief, Florida Department of Environmental Protection dated March 18,2011 - Re: "Wiggin 's Pass long- term inlet plan and permit application. " CAC June 9. 2011 VI-1 Approval ofCAC Minutes 3of6 . Letter to Mike Barnett, Bureau Chief, Florida Department of Environmental Protection dated April 13, 2011 - Re: "Wiggin 's Pass Telephone Conference April 5, 2011 and Wiggin 's Pass long-tenn inlet plan and permit application memo dated 3/18/2011. " He reported on a meeting he and Chairman Sorey had with Mr. Vinyard and Governor Rick Scott. Speakers Nicole Johnson, Conservancy of Southwest Florida Kathy Worley, Conservancy of Southwest Florida VITI. New Business 1. Conceptual Design Update CP&E Gary McAlpin provided the document "Draft - Collier County Conceptual Renourishment Project Analysis" prepared by Coastal Planning & Engineering, Inc. Boca Raton, FL - May 2011 for information purposes. The Committee recommended the title of tlte study be renamed to identify the project area as "Vanderbilt, Park Sltore and Naples Beaches" (or similar wording) as opposed to "Collier County. " It was noted the document will be reviewed in a future meeting. 2. 19510 Year Plan Gary McAlpin provided the document "TDC Category "A" 195 Fund Projections" for consideration. The Committee requested staff review the "Interest blCome" row under the Revenue Category to ensure it is accurately depicted in the document. Mr. Moreland moved to approve the "TDC Category "A" 195 Fund Projecti01I" document subject to tlte Committee's above request Second by Mr. Pires. Carried unanimously 8 - O. 3. Fiscal Year 11/12 Proposed Budget Gary McAlpin provided the document "FY11/12 -195 Fund Budget and Analysis - Rev. 1 " dated May 12, 2011 for consideration. Mr. Rios moved to approve the "FYll/12 -195 Fund Budget and Analysis- Rev.1" dated May 12, 2011 subject to the approvals in item VIIL4 (Grant Funding). Second by Mr. Pires. Carried unanimously 8 - O. 4. Fiscal Year 11/12 Grant Applications a. Backup Material CAC June 9, 2011 VI-1 Approval of CAC Minutes 4of6 Gary McAlpin provided the Executive Summary "Share TDC Category "A: Grant Applications from the City of Naples, the City of Marco Island and Collier County for FY-ll/12" dated May 12,2011 and related backup material for consideration. Barry Williams, Director, Par,ks and Recreation provided a copy of an email from himself to John Sorey dated May 02, 2011- Subject: "Sea Turtle Monitoring" for information purposes. He provided an overview of the Sea Turtle Monitoring Program. Speaker David Addison The Committee approved the following grant requests from the Executive Summary as listed below: 1. Reeulatorv and Permit Compliance Mr. Morelalld moved to approve a grallt request ill tlte amount of $163,000 for the "Sea Turtle Protection Program - Collier County." Secolld by Mr. Burke. Carried unanimously 7 'yes" -1 "110." Mr. Pires voted "no. " Mr. Pires moved to approve a grallt request in tlte amount of $17,500 for the "Beach Tillillg - Collier County 081071." Second by Mr. Rios. Carried ullallimously 8 - O. Mr. Pires moved to approve a grallt request ill the amount of $260,000 for the "Physical Beach & Pass Monitoring Collier County Beaches - 90536." Secolld by Mr. Morelalld. Carried unanimously 7 'yes" -1 "110." Mr. Helldel voted "110. " Tlte Committee requested staff, for budgetary planning purposes, prepare a report for Committee review on prioritization of Coastal Zone Managemellt projects. Mr. Pires moved to approve a grant request ill the amount of $17,500 for the "Beach Tillillg - Collier COUllty 081071." Secolld by Mr. Moity. Carried unanimously 8 - O. 2. Planned Projects Mr. Moreland moved to approve a grant request in the amount of $50,000 for the "Wiggin's Pass Maintenallce Program - Engineering - 90522. " Secolld by Mr. Burke. Carried ullanimously 8 - O. Mr. Pires moved to approve a grant request ill the amoullt of $350,000 for the "Emergency Truck Haul- Vistas at Park Shore - 88030" subject to its' CAC June 9. 2011 VI-1 Approval of CAC Minutes 5of6 being rmamed "Truck Haul- Vistas at Park Sltore - 88030." Second by Mr. Hendel. Carried unanimously 8 - O. Mr. Pires moved to approve a grant request in tlte amount of $600, 000 for the "FY12113 Beach Design and Permit with HS Solutions - 80096" subject to its' be renamed "FYll112 Beach Design and Permit with HS Solutions- 80096." Second by Mr. Hendel. Carried unanimously 8 - O. Mr. Moity moved to approve a grant request in the amount of $300,000 for the "MI Renourislt Deign & Permit with BW Solutions - 80166." Second by Mr. Rios. Carried unanimously 8 - O. Mr. Moity moved to approve a grant request in the amount of $20,000 for the "Laser Grading North Marco Beach (R133-141)." Second by Mr. Rios. Carried unanimously 8 - O. Mr. Rios moved to approve a grant request in the amount of $25,000 for the "Tigertail Beaclt Refurbishment." Second by Mr. Burke. Carried unanimously 8 - O. 3. Beach Maintenance Mr. Moreland moved to approve the following grant requests ($341,950 total) : . Beach Maintenance - Collier CountylMarco Island - 90533 - $135,100 . Beach Maintenance - City of Naples - 90527 - $76,850 . Vegetation RepairslExotic Removal- County Wide - 90044 - $75,000 . Naples Pier Annualized Repair & Maintenance - City of Naples - 90096 - $55,000 Second by Mr. Hendel. Carried unanimously 8 - O. 4. Administration Fees Mr. Pires moved to approve tltefollowing grant requests ($727,500 total): . Fund 195 and 183 Administration - Collier County - 90020 - $510,500 . Indirect Administration Costs - $107, 700 . Tax Collector Fees (2.5%) - $109,300 Second by Mr. Moreland. Carried unanimously 8 - O. 5. Other Expenses Mr. Rios moved to approve tlte following grant requests ($20,843,600): . Rmourishmmt and Emergency Reserves - $17,000,000 . Revenue Reserve (5%) - $218,600 . Category D Pier Reserve - $79,000 . Reservefor Contingency Totals - $146,000 . Reserve for FDEP Reimbursement - $3,400,000 Second by Mr. Raymond. Carried unanimously 8 - O. CAC June 9, 2011 VI-1 Approval of CAC Minutes 6of6 5. Summer Schedule Gary McAlpin provided the Executive Summary "Determine summer schedule for CAC Meetings" dated May 12,2011 for consideration. Mr. Rios moved to cancel tlte regularly sclteduled July meeting of tlte Coastal Advisory Committee. Second by Mr. Burke. Carried unanimously 8 - O. 6. Chair and Vice-Chair Gary McAlpin provided the Executive Summary "Election of Chainnan and Vice-Chainnan" dated May 12,2011 for consideration. Mr. Hendel moved to appoint John Sorey, III as Chairman and Tony Pires as Vice-Cltairman of the Coastal Advisory Committee. Second by Mr. Burke. Carried unanimously 8 - O. IX. Old Business None X. Announcements The Clam Bay Stakeholders will meet on May 17, 2011. XI. Committee Member Discussion Mr. Moreland reported Commissioner Coletta will be touring Wiggin's Pass on June 6, 2011. Mr. Hendel reported he toured Wiggin's Pass. xn. Next Meeting Date/Location June 9, 2011 - Government Center, Administration Bldg. F, 3rd Floor ***** There being no further business for the good of the County, the meeting was adjourned by order ofthe chair at 2:44 P.M. Collier County Coastal Advisory Committee John Sorey, ill, Chairman These minutes approved by the Board/Committee on as presented or as amended ......1Il ......1:: 00 NO. . OJ <>>0:: OJ:t:: <:: '" ~Ci5~ ~~o 0>...... ~ ..... ..... o N I o ..... o N >- U. 1:: o Q. CIl 0:: CIl ::s r::: CIl > CIl 0:: >< nl I- - Ul .;: ::s o I- - c ~ u .. ~ 0.. .... .... CD ..,. 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I: Q) "C 0..,9 "'- Z I: _ 0 .i':'~ I:~ '" U o '" II .. <D 0> '2 .B ';:: o ~ "5 'iij >- ~ "- ~ to III > o o ci o o o to '" ... .... cO co '" '" .... .... ....- ... ... o o ci o <>. <> CD '" .... "l ... '" '" lII' .... ~ ... ... ... '" II> ci 1II .... !Ii .... N ,..; II'> ... en en r..: .... .... o :1:. ... ... .,. o o ci o o o CD '" CD o ci '" 1II N CD II> ....- II'> .,. o o ci o o o CD N o '" ci o en o II> "l. ... II'> ... CD '" '" <> en '" en II) ...J ~ o I- CAC June 9, 2011 VIII-1 New Business 1 of 112 Draft COLLIER COUNTY CONCEPTUAL RENOURISHMENT PROJECT ANALYSIS Prepared For: Coastal Zone Management Department Collier County Government Prepared By: Coastal Planning & Engineering, Inc. Boca Raton, FL May 2011 CAC June 9, 2011 VIII-1 New Business 2of112 Draft COLLIER COUNTY CONCEPTUAL RENOURISHMENT PROJECT ANALYSIS I. INTRODUCTION TIns design study assesses the feasibility of several renourishment alternatives for the beaches of Collier County. One alternative addresses the renourishment needs of the original three segments constructed as part of the 1996 renourishment project. Other alternatives considered are increasing the design width and height of the beach along with the consideration of including two additional small reaches adjacent to Clam and Wiggins Passes. The same'borrow area (BA- T1) is proposed for use for the upcoming renourishment project. The main objective of this study is to develop a design that will enhance project performance and increase the project life to maintain a healthy beach for up to 10 years without significant impacts to the natural resources within the project area. The performance of the beach in avoiding hardbottom coverage has exceeded permit expectations, and the results of 4 years of physical monitoring indicate that the beach can be widened without a significant increased risk of hardbottom impacts. The design alternatives will incorporate the recently approved FEMA funding. The study area encompasses approximately 13 miles of coastline between the Wiggins Pass and Gordon Pass (Figure 1). Collier County is approximately 115 miles south of the entrance of Tampa Bay and about 100 miles west of Miami, Florida. The County is bordered to the west and southwest by the Gulf of Mexico, to the south by Momoe County, to the east by Dade and Broward Counties, and to the north by Lee and Hendry Counties. n. PROJECT AREA mSTORY The beaches of Collier County have been actively maintained for 15 years. This maintenance includes structures, beach nourishment, and inlet bypassing. Beach Nourishment The initial major nourishment project in Collier County occurred in November 1995 in order to restore nearly six miles of critically eroded shoreline. Approximately 1,270,600 cubic yards of material was placed on Vanderbilt, Park Shor~, and Naples Beaches. Sand for the project was obtained from four offshore borrow areas and supplemented with fill from upland sand sources. The project also included the extension of the north Jetty of Doctors Pass by approximately 75 feet, the removal of 36 groins, and the restoration of six rock groins and a pile cluster groin. The project also included the restoration of ten existing stormwater outfalls on northern Naples Beach. CAC June 9, 2011 VIII-1 New Business 3 of 112 GULF OF MEXICO NAPLES t TAllAHASSEE JACKSONVIlle \II 'i. J WlGG/NSPASS (,'"" Dl'LNOR-Wic;c,l,i . STATE PAAIF(, )^\ ! VANDERBILT '1 " ORlANDO AnNm OCEAN () BOCA RATON . MIAMI GULF OF ltH:XlCO ~ III :::E :z: IQ ii ~1lI~ iiii l:!~Z :c~g ~<c!( ~~g all:: oJ a::'C~ O~<.lw ....w ~",a ~;.Ja: t-<Ca. III z o jij III C N 1IlOCOO PELICAN BAY '( , NIIlIOQOQ NORTH PARK SHORE N llllOOQO t \~~af \ GRAPHIC SCALE IH FT PARK SHORE SR~ SRll58 Nll8lllioa NAPLES HeeooDll COMBINATION TEMPLATE EXISTING TEMI'LATE FEMATEMPLATE SPECIAL SEGMENTS I A lUG FDEP MONUMEHlS NOTES: 1. COORDIHATESARE IN FEET BASED ON . ~_UA"'_""""~" SYSTEM, EAST ZONE, NORTH AMERICAN c DATUM OF 1lHl3 [NAD83~ ~ 2. FlU. W1D1liSARE NOTTOSCALE, ll. ~1 \ GORDQN,l~' . \J.!:...;:.~\. \" \ --. ... '-j' \ -l,.,_ 'i~ } \"' 8500,62 FIGURE 1. Project Location Map Between February 21 and May 23, 2006, Collier County constructed a beach renourishment project in Vanderbilt Beach (R-22 to R-37), Park Shore (R-45 to R-55), and Naples Beach (R- 58A to R-79) along approximately 8.5 miles of shoreline. This project used an offshore sand source as well as sand from ongoing inlet maintenance at Doctors Pass. Approximately 668,000 CAC June 9, 2011 VIII-1 New Business 4 of 112 cubic yards of beach compatible sand from the offshore sand source and approximately 53,600 cubic yards of sand from inlet maintenance were placed within the project area. Supplemental fill projects, such as truck haul, have taken place within the project area since construction of the 1996 project. The most recent truck haul projects took place in summer 2010 and spring of 2011 in order to address two erosion hot spots within the County. The summer 2010 project took place between July 2, 2010 and July 9, 2010. Approximately 2,650 cubic yards (3,712 tons) of sand was placed south of Doctors Pass from R-58A-500 to R-58A+100. The second project took place in March 2011 and placed 22,393 cubic yards and 7,836 at Doctors Pass (R-58A-400 to R-58) and Park Shore (R-45+600 to R-46+400) respectively. Inlet Maintenance Periodic dredging and bypassing has taken place at Wiggins Pass, Clam Pass, Doctors Pass, and Gordon Pass in recent history. Wiggins Pass Wiggins Pass is a natural inlet located south of Big Hickory Pass between R-16 and R-17 in Collier County. The pass has known to be open since 1885, and it is the northernmost inlet in Collier County. Since 1927, the pass has remained relatively stable and was first dredged for navigation in 1984. Wiggins Pass is currently dredged at regular intervals of approximately 2 years to maintain navigable depths for recreational boaters. The average yearly rate of dredging since 1984 has been about 20,370 cubic yards per year, with sand being placed on the beaches to the north and south of the pass. Currently, a comprehensive inlet management plan and permit is being prepared to create safer navigation, reduce maintenance dredging, and impacts to adjacent shorelines. Clam Pass Clam Pass is another of Collier's natural inlets, located 5 miles south of Wiggins Pass between R-41 and R-42. Clam Pass is a small inlet subject to periodic closures and seasonal variations. Between 1954 and 1970, the pass migrated about 600 feet to the north (OF, 1970). From 1995 through 2002, a total of 78,725 cubic yards was dredged from the inlet system and placed onto adjacent beaches, primarily to the south. In 2007, approximately 22,000 cubic yards of material was dredged from the pass. Doctors Pass Doctors Pass is the northernmost stabilized inlet in Collier County and is located south of Clam Pass between R-57 and R-58. The first modification of the inlet occurred in 1960, when the pass was widened and stone jetties were constructed for stabilization. As part of the 1996 Collier County Restoration Project, the north jetty was extended approximately 75 feet. The channel was first dredged in 1966 and 10-year dredging permits were issued in 1984 in order to maintain the pass and address impacts to adjacent beaches. In 1997, the DEP adopted an inlet management plan that specified all dredged CAC June 9, 2011 VIII-1 New Business 5 of 112 material be placed on the beaches or inshore zone south of the inlet meeting a minimum bypassing goal of 10,000 cubic yards on an average annual basis. Maintenance dredging has traditionally occurred at Doctors Pass every 3 to 4 years. The County conducted maintenance dredging of Doctors Pass in the winter of2009. Approximately 36,000 cubic yards of dredged sand was placed in the nearshore area south of the inlet, between R60 and R62. Gordon Pass Gordon Pass is another major stabilized inlet, located south of Doctors Pass between R- 89 and R-90. Gordon Pass is the southernmost inlet within the study area and has been known to be open since 1885 (USACE, 1972). The first modification of the inlet occurred in 1962, when the pass was widened and the south jetty was constructed for stabilization. The north jetty was constructed in 1977 and lengthened in 1987. The Gordon Pass Inlet Management Plan (CPE, 1998) recommended dredging 22,000 cubic yards per year on a 5-year maintenance cycle, of which at least 13,000 cubic yards per year be bypassed to the south. m. STRATEGIC BEACH MANAGEMENT PLAN This plan represents the State's beach objectives. Projects which meet State objectives are easier to permit and receive state funding. In 2008, the FDEP Bureaus of Beaches and Coastal Systems updated the Strategic Beach Management Plan for the Southwest Gulf Coast Region. The sub- region for Collier County (Naples Coast) extends from the Lee County line in the north to the midpoint of Keewaydin Island in the south. The barrier beaches are separated from the mainland by mangrove swamp, salt marsh, and small bays. The Plan identifies 8.5 miles of critically eroded beach within this sub-region, which is attributed to winter frontal systems, tropical weather systems, and the effects of the inlets (Wiggins, Clam, Doctors, and Gordons Passes). Barefoot should be part of the plan in its next addition. The following sections are excerpts from the Management Plan (FDEP, 2008) and pertain to the critically eroded areas of Collier County: Wiggins Pass, Collier County: Place beach quality maintenance dredged material on adjacent beaches north and south of Wiggins Pass within areas of greatest need; monitoring and analysis of inlet effects. Vanderbilt Beach, Collier County, R-22.3 to R-30.5: Maintain the project through monitoring and nourishment using sand from offshore and bypassing sources. Clam Pass, Collier County: Monitor Park Shore, Collier County, R-50.65 to R-57.5: Maintain the project through monitoring and nourishment using sand from offshore and bypassing sources. Doctors Pass, Collier County: Place all beach quality dredged material on the beach or nearshore zone south of the inlet meeting a minimum bypassing goal of 10,000 cubic yards on an average annual basis. CAC June 9, 2011 VIII-1 New Business 6of112 Naples, Collier County, R-57.8 to R-89: Maintain the project through monitoring and nourishment using sand from offshore and bypassed from Doctor's Pass; evaluate alternatives to restore the remaining critically eroded shoreline. Gordon Pass, Collier County: Place beach quality maintenance dredged material on downdrift beaches south of the inlet. IV. RECENT MONITORING RESULTS The results from the fourth annual monitoring survey (October 2010) of the 2005/2006 Collier County Beach Restoration Project have become recently available; therefore, the results from October 2010 and portions of findings from the July 2009 monitoring report were used within the preliminary design. Shoreline Changes The Mean High Water (MHW) elevation measured at each profile is used to represent the typical shoreline location. In Collier County, the MHW elevation is +0.33 ft NA VD 88. The MHW shoreline is approximated by the high-tide mark on the beach. The MHW shoreline changes from November 2005 to October 2010 are listed in Table 1. The total beach width remaining within the project area since construction along with the design standard and hot spots is shown in Figure 2. The pre-construction survey considered in this report was conducted in November 2005 witlnn the constructed areas and September 2005 in other regions of the monitoring area between R-17 to R-84. The June 2006 survey used within the report is considered the post- construction survey, and the surveys for 2008,2009, and 2010 are used for monitoring purposes for the project area. Recent shoreline trends in the last year indicate shoreline gains in reaches north of Clam Pass, and losses to the south. In comparison to beach widths measured after construction in 2006, Pelican Bay has remained relatively stable retaining 91 % of its beach width, while Park Shore has lost the greatest percentage of shoreline, retaining only 28%. The other two reaches have retained over 50% of their shoreline width. Vanderbilt Beach On average, the project area has receded -18.5 feet since construction, although the shoreline was accretiona1 over the past year. The average beach width remaining in October 2010 is 18.9 feet from the 37.4 feet measured post-construction. Since 2006, survey measurements within the fill limits indicate an average shoreline change rate of - 4.3 feet per year. Ul Ul '-Q.l '-C o- N Ul '" aim Q.l :: CQ.lN ~Z-r- u.-.- <C.~b U>r-- a~ r"'~ ~l u' ol Ii I ! C) :z 2 <t :2 w 0:: :z: t- e ;: :I: U et w aJ .J ~ g i j col ~l li:1 W' WI II IOJ o ,! :>l 01 I! ~ i ~ j ~ I i o. 0::' ~I ZO ~l CJ:J~ zl C>\ ffi! I: o o N WIGGINS PASS R-17 R-1B R-19 R-2D R-21 R-22 R-23 R-24 R-25 R-26 R-27 R-28 Rc29 R-30 R-31 R-32 R-33 R.34 R-3S R-Se R-37 R-S8 R-39 R-40 R-41 CLAM PASS I R42 R-43 ~ R-44 - R45 J- et R-46 0 R47 0 R48 .J R49 t- T -50 :z R-51 ~ R-52 ::l R-53 :z R-54 0 U-55 :2 R-5e cr T-57 DOCTORS R-5BA R-58 R-S9 R-60 R-61 R-62 R-G3 R-G4 R.G5 R-66 R-67 R-GS R-G9 R-70 R-71 R-n R~73 R-74 R-75 R-76 R-n R~78 R-79 R-8D R-81 R-82 R-B3 R..s4 &.0 " .... o 10 ..- &.0 N ..- o o ..... 10 " o 10 10 N o 10 C}I I Ifj o ~ ..... a.. ~ E .5 .!2!!} II) ()'E o '0 = Q. ~ '0 (f.) _ fJ) "0 g-e XWQ. DO x ~ o z = o ... .... l;.l = '"' .... fIJ = o U = o .:: bJ) = '2 ... ~ = ~ ~ -= .... "0 ~ -= l;.l ~ ~ = r t - ~ .... o E-t M ~ rJ ~ ~ :z: I- ::l o en .S - o c: CAC June 90 2011 VIII-1 New Business 8 of 112 Pelican Bay Over the past 4 years, Pelican Bay has had both an erosional and accretional trend. From post-construction to 2008, the shoreline lost much of its added beach width. Since 2008, a majority of that beach width has recovered. Overall, the project area has approximately 20 feet of beach width remaining compared to the 22.5 feet of beach width measured post-construction. The average shoreline retreat measured within this reach is approximately -0.5 feet per year. TABLE 1 COLLIER COUNTY MHW SHORELINE CHANGES MHW SHORELINE CHANGES PROJECT AREAS JULY 2009 REMAINING NOV. 05 TO TO OCT. 2010 JUNE 2006 JULY 2009 OCT. 2010 VANDERBILT BEACH 3.8 37.4 15.1 18.9 (R-22 to R-31) PELICAN BAY 4.6 22.5 15.9 20.4 (R-31 to R-37) PARK SHORE -5.6 30.9 14.1 8.5 (R-45 to R-55) NAPLES BEACH -4.5 56.5 36.8 32.3 (R-58A to R-79) AVERAGE -0.4 36.8 20.5 20.0 Park Shore On average, the project area has receded -22.4 feet since construction, with -5.6 feet of shoreline change since July 2009. The average beach width remaining in October 2010 was approximately 8.5 feet. Since 2006, the Park Shore Beach area has lost approximately -5.2 feet of shoreline per year. Naples Beach The Naples Beach project area has eroded -24.2 feet since construction, which equates to approximately -5.6 feet per year of shoreline retreat. The project area contains approximately 32.3 feet of added beach width remaining. A majority of the erosion that was experienced within the Naples region near R-58A, which is caused by the inlet effects of Doctors Pass. CAC June 90 2011 VIII-1 New Business 9of112 Beach Width Remaining versus Design Standard The design standards for Vanderbilt Beach, Park Shore, and Naples Beach are 100 feet, 85 feet, and 100 feet, respectively. The design standard, which generally measures the amount of sandy beach from a line established in 2003, is used as a basis to identify hot spots. From comparing the design standards to the present condition of the beach, six areas that warrant attention were identified (Figure 2). Vanderbilt Beach (R-27) and Pelican Bay (R-35) both contain one narrower beach width spot. The Pelican Bay hot spot has largely recovered since 2008. Park Shore (R-46 and R-52) and Naples Beach (R-58 and R-63) have two areas of narrower beach width. Based upon the beach width remaining 4-years after construction, these beaches are narrower than the design standard established in 2003. The area south of Clam Pass and north of Wiggins Pass would warrant attention, but they were not part of the 1996 or 2006 beach renourishment projects. Although Figure 2 illustrates the desired beach width standard, environmental restrictions to avoid hardbottom coverage and other limitations did not allow for the placement of the optimal sand volume in all areas in the 2006 project. TABLE 2 COLLIER COUNTY VOLUMETRIC CHANGES . REMAINING NOV. 05TO " . PROJECT AREAS DESIGN ,', AS-BUILT JUNE 2006 JULY 2009 OCT. 2010 V ANDERBIL T BEACH 121,689 121,487 108,642 85,707 98,375 (R-22 to R-31) PELIC~ BAY 57,225 56,955 78,858 62,913 66,416 (R-31 to R-37) N.PARKSHORE 27,778 27,705 -3,006 -8,676 -19,357 (R-45 to R-48) PARK SHORE 112,446 114,034 96,599 87,658 73,281 (R-48 to R-55) NAPLES BEACH 345,283 347,381 296,568 301,676 264,518 (R-58A to R-79) TOTAL 664,421 667,562 577,661 529,278 483,233 Volumetric Changes The volumetric changes discussed in this report represent the difference in the quantity of sand measured along the beach between surveys. All volumetric changes are given in cubic yards. CAC June 90 2011 VIII-1 New Business 10of112 Volumetric changes were calculated between the dunes (upland) and the approximate depth of closure. The depth of closure is defined as the seaward limit of the active beach profile and it is assumed that sand transport beyond this depth is negligible. A depth of closure of -11.3 ft NA VD was used to determine volumetric changes for each monitoring area (CPE, 2003). The landward and seaward limits were fIxed to defIne a consistent region for all volumetric calculations. Vanderbilt Beach The project area has lost -10,267 cubic yards of sand since construction at an average rate of -2,370 cubic yards per year. Profile comparisons indicate a gain of 12,668 cubic yards over the last year. Overall, this reach has approximately 81 % of the as-built volume remaining in October 2010. Pelican Bay Pelican Bay has been accretional over the later half of the 2006 project, similar to the accretional trend that was experienced during the 1996 project. The reach has gained approximately 3,500 cubic yards since July 2009. This reach has over 100% of its as- built volume remaining. Park Shore The Park Shore project area has lost -39,669 cubic yards of sand since construction at a rate of approximately -9,150 cubic yards per year. Over the past year, the Park Shore reach has been in an erosional state and has lost approximately -25,058 cubic yards. Overall, this reach has approximately 38% of its as-built volume remaining, with major losses occurring to the north from R-45 to R-48. Naples Beach Since construction, the Naples Beach project area has lost approximately 32,050 cubic yards, which is approximately -7,400 cubic yards per year. Overall, this area of the 2006 project has approximately 76% of its as-built volume remaining. V. PROJECT PERFORMANCE The design volume for the entire project area, R-22 to R-79, was 664,421 cubic yards. The same area had an as-built volume of 667,562 cubic yards. Volumetric changes measured from the pre- construction November 2005 survey to the five year post-construction in October 2010 survey measured 483,233 cubic yards remaining in the project area or 72% of the design volume. Figure 3 illustrates a summary of project average shoreline and volumetric changes since construction. It shows the average shoreline width and volume remaining in the project area at the time of each monitoring survey compared to the 2005 pre-construction condition. As a point of comparison, the expected average project width at equilibrium based on the initial fill volume CAe June 9, 2011 VIII-1 New Business 11of112 of 667,600 cubic yards is 27 feet. The coarse sand is providing an average width of 25 feet in 2010 with less measured volume. Since June 2006, the shoreline has gone through three periods: Initial adjustment which occurred through 2007, Tropical Storm Fay recession which dominated through September 2008, and a moderate shoreline recovery which can be observed since 2008. Volumetric changes are steadier than the average shoreline recession. Collier County Project Performance 60 50 ;;- Q) Q) :=. .c 40 :c ;: .c 30 <.) III Q) lD Q) Cl 20 l!! Q) > < 10 900,000 ......................:.... . ...............:......................;......................;......................:............. ......... 750,000 . . , . . ,. . .. : :: < , :: 0 _.......;..... ~un-G7- - - - -. - -. - -;- - - -.. m_ n..........;......................~............. .......... 600,000 C : : :: 3 : :: CD , , , n c cr n' '< III ... c. .!!!. . , , , , , _. _...~.. _....... eo.. ......0. __~. .__... _..... _0_ ...... _;_............ _.__. .--- - 450,000 , i Jul.Q9 i Oct-10 _______ _____ ___ - __ ___.1 . _ _ _ _ _ __ _ _ ___ _ __ __ _ _ ~ _ _ _ _ _ _ _ _ _ _.. __ . . . , . , . , . . n nnnnnnn_ m _, m n_ _ __ _ _ m _ nn _-j- _ __ _. _ _ _ _............ j.... _....... ...._.n _. j_ - n - - _............... -:-.............. ...._n - 300,000 . , . , , , . , . , . , . , .... _0............... .;................0..... ~.. ............ .........~...... _0_" eo....... ...~...................... .~. eo.. ..... .._.._ _.......... 150,000 , , Nov.QS o 2005 2006 2007 2008 Survey Date 2009 2010 o 2011 Notes: - 1. Baseline Is November 2005 survey. 2. Volumes measured to -11,3' NAVD, 3, Beach width measured at MHW (+0,3' NAVD), -"'Beach Width -'-Volume FIGURE 3. Collier County Project Performance The results of the recent monitoring studies indicate that Tropical Storm Fay did affect the beaches of Collier County and caused approximately 175,000 cubic yards of erosion which qualified for FEMA category G assistance. This FEMA funding will provide the foundation for the next renourishment project, and the smallest alternative size will be designed based upon this FEMA approved amount. The basis for increasing the design width and height was developed with the original permit in 2003. However, this was restricted by permit conditions, but is now supported by the results of recent physical monitoring. Data from the recent beach renourishment monitoring programs in Collier County indicate that coarser sand fill sections equilibrate to a steeper, shorter profile than the original fmer sediments (Figure 4). The toe of the active profile has not translated seaward as presupposed by the simple profile translation method of design, but it has actually receded in most cases. The 2008 storm season provided the wave energy needed to equilibrate the entire profile, causing an overall iandward recession of the beach toe as predicted by theory. The toe retreat compared to earlier profiles is illustrated in Appendix A. Profiles from the 1995 pre- construction to the latest in 2010 are compared. CAC June 9, 2011 VIII-1 New Business 12of112 The November 2005 and June 2008 surveys represent post-storm profiles from Hurricane Katrina & Wilma and Tropical Storm Fay respectively, and make a good basis for analyzing storm profile adjustment with and without the higher quality sand. The September 2005 and July 2009 surveys are largely unaffected by large storms, and make a good comparison pair for typical beach conditions. It is for this reason that the 2009 survey was incorporated into this study. A post storm beach profile survey was conducted in Fall 2008 and compared to beach profiles taken in November 2005. In addition, the surveys conducted after the 2008 storm seasons showed that moderately sized storms do not cause a seaward advance of the toe of the active . profile over adjacent hardbottom habitat. Figure 4 illustrates the landward recession of the toe of fill for four averaged profiles in Park Shore. The average profile comparison also indicates that the toe of the active profile has receded an average of 37 feet in this example, with added beach width remaining for 2006 construction. In this case, if we extend the beach width by 37 feet, it would bring the profile out to the conditions at the time of construction, therefore no hardbottom coverage. In most cases, there is room to spare beyond profile translation before the 37 feet of additional width would encroach on the hardbottom. Park Shore Average Profile R-60 to R.53 '10 8. 6, 4, 2 Q :;:>' 0 <I: z E: ..2. c ,g " -4' ". <II iii .6 .6 -10. NAVD=-11.D -12. -14 -150 -100 -~.o 0 ,..".._'~.._..m.._m...'.._~ "I. ,'-t.JQv 2005 ! :'-::-:: ~~".~ ~!l~Jl I I ~ 37.1' 50 100 150 200 250 300 350 400 450 500 55<1 eoo 650 7C{) 7!:-0 500 Distance (FT) FIGURE 4. Profile retreat at Park Shore between November 2005 and June 2008 As a preliminary design estimate, beach width can be extended by the recession distance of the toe. Since the toe of recession is hard to measure is some cases, we have also reviewed the recession of the -10 foot contour. CAC June 9, 2011 VIII-1 New Business 13of112 There has been change in the datum used during the 2006 project. The current datum is NA VD, which is 1.28 feet lower than the NGVD datum used for the 2006 permits and design. The average depth of closure was found to be -10 feet NGVD, which is -11.3 feet NA VD. The depth of closure is based on the intersection of successive profiles is not a constant -11.3 ft NA VD, but varies along shore. In general, the depth of closure is higher than -11.3 ft-NA VD for profiles behind hardbottom and deeper that -11.3 ft NA VD in regions where there is not offshore hardbottom. The region south of R-67 generally has no nearshore hardbottom offshore. This means that any design of a new beach width would have to be done on a profile by profile line basis, which will be performed in a more detailed design study. The current design study is preliminary and did not analyze profiles on an individual basis or include spreading or diffusion. In this study, the average recession of the -10 ft-NA VD contour was used to determine an allowable increase in the beach width design. The average profile retreat indicated by the retreat of the -10ft NA VD contour is between -40 ft and -25 ft respectively for the 2005-8 and 2005-9 pairs respectively. Avoidance of hard bottom is not necessary south ofR-67 and in some reef gaps where the beach width is not restricted. There are a few other points where the hardbottom is sufficiently offshore, so that the beach width can be practically unrestricted. Coverage due to lateral spreading of hardbottom must be considered in these cases in final detailed design. This should be done using 3D analysis methods. VI. SEDIMENT BUDGET ANALYSIS A sediment budget estimates the sand movement during a specific time period over a particular segment of the coast. A sediment budget was developed for the period after the recent nourishment project and is presented in Figure 5. The post-construction sediment budget was based on the monitoring results from 2006 to 2009 surveys and sediment bypassing information from each inlet. The changes in the inlet shoal volumes were based both on bathymetric survey data and dredging records. In the study area, the sediment transport is generally towards the south. At the inlets, sediment naturally moves into the inlet, but is generally bypassed through dredging and some natural process. Overall, 300 cy/yr is shown to enter the system near Barefoot Beach at R-10, and approximately 900 cy/yr per year was determined to be leaving the area and going south to Gordons Pass. The volume change in each cell is based on monitoring results from the 3 year monitoring report. The alongshore transport arrows show the direction and magnitude of it at each cell boundary. Dredge and fill operations are illustrated. The final budget indicates a reversal in alongshore transport south of each inlet, and is only a illustration of processes during the 2006-9 period, and does not necessarily represent the average conditions. A'\.O ,- I I \ , :16.6- I \ '---5.6- GULF OF MEXICO NAPLES +11.3 LITTORAL SAND TRANSPORT MECHANICAL SAND TRANSPORT (DREDGING OR TRUCK PLACEMENT) CAC June 9, 2011 VIII-1 New Business 14of112 1 1 o I 6000 12000 I GRAPHIC SCALE IN FT SR89 SR 886 SR 856 . KEEWAYDIN ~.~LAND \. .~\ FIGURE 5. Sediment Budget for Collier County, FL (2006-2009) ALL VALUES IN CY.NR, x 1000 VIll. LONG TERM EROSION TRENDS Erosion trends were determined using monitoring data for the periods 1996-2004 and 2006-2010 in order to compare erosion experienced during the two renourishment projects and to create a CAC June 9, 2011 VIII-1 New Business 15of112 composite erosion rate of the two time periods. The longterm erosion rate accounts for all fill placed directly in the project area during the monitoring period. Figure 6 illustrates the erosion trends throughout the project area. The units are in cubic yards per year per foot of beach. From comparing past and current volumetric changes, six areas of high erosion were identified within the study area. The one area is in Vanderbilt Beach centered near R-27. The next area is located directly south of Clam Pass at R-42 to R-44. There is an area of erosion at Park Shore near R-52. A newly developed hot spot directly south of Doctors Pass was identified at R-58A to R-58. An area of interest also lies south of Lowdermilk Park at R-63. An area of past erosion and more moderate erosion since 2006 was identified near R-71 in Naples Beach, but given its current state of beach width, it is not as serious as the other five. Delnor Wiggins State Park also has a high erosion trend at R-18, but this area has had an accreting shoreline since 1985. Collier County Average Erosion Rates from 1996-2010 -1996-2004 -2006-2010 -Composite (1996 to 2010) Doctors Pass Hot Spot -12,00 -10.00 -8.00 "i:' ~ >- ~ .. CD c -6.00 " .c U :E E " -4.00 c; :> -2.00 0.00 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~A~~-O~~~~~AWN_O~~~~~AWN_O~~~ :>- ~~~~~~~~~~~~~~f~~~f~~~~~~~~~~~~~~~~~~~~~~~~ ~~~AWN-O~~~~~AWN3_o~~~~~AWN_O~~~~~AWN_O~~~ .......~........ ~ FDEP R-Monument ~ Note: 1.) .mcasurcmcnts only available from June 2000 to May 2004 for 1996102004 time period 2) Acaetional values arcnal shown. Represented by zero on Ihe plot FIGURE 6. Erosion Trends throughout Collier County The design was based on erosion rates from 1996-2004 and post-construction (2006) to the October 2010 survey in order to create a composite erosion rate of the two time periods. The composite erosion rate was needed to help balance the higher rates of erosion experienced in the past years due to the initial profile equilibration and Tropical Storm Fay. If the erosion rates from the four-year monitoring (2006-2010) were used, the design volume would be much larger. Calculations for the long term erosion rate can be found in the monitoring reports. CAC June 90 2011 VIII-1 New Business 16of112 IX. INFLUENCES AND IMPACTS Storms Over the past seven years, the project area has been hit or experienced far field effects from several hurricanes and tropical storms. Before the 2006 project was constructed, a series of storms impacted Collier County's shorelines. These storms impacted the beach profiles such that they were unable to fully recover before the 2006 construction. A list of the storms that have affected the area from 2004 to 2008 are listed below. The 2004 Atlantic Hurricane Season produced sixteen storms; nine of which were hurricanes, six tropical storms, and one tropical depression. The storms that affected the west coast of Florida during this season are listed below. 2004 Storms Tropical Storm Bonnie Hurricane Charley Hurricane Frances Hurricane Ivan Hurricane Jeanne Duration 8/03/04 - 8/14/04 8/09/04 - 8/14/04 8/25/04 - 9/1 0/04 9/02/04 - 9/24/04 9/13/04 - 9/28/04 Intensity 65 mph, 1001 mbar 150 mph, 941 mbar 145 mph, 935 mbar 165 mph, 910 mbar 120 mph, 951 mbar The 2005 Atlantic Hurricane Season was the most active season on record, with Hurricane Wilma setting the Atlantic record. A post Hurricane Wilma survey was performed in November 2005, about a week after the storm. This survey data was collected in order to reassess the beach conditions of Collier County after Hurricane Wilma's impact on the coastline. The other storms which affected the west coast of Florida during the 2005 Hurricane Season are listed below. 2005 Storms Tropical Storm Arlene Hurricane Cindy Hurricane Dennis Hurricane Emily Hurricane Katrina Hurricane Rita Hurricane Wilma Duration 6/08/05 - 6/13/05 7/03/05 - 7/07/05 7/04/05 - 7/13/05 7/10/05 - 7/21/05 '8/23/05 - 8/31/05 9/17/05 - 9/26/05 10/15/05 -10/25/05 Intensity 70 mph, 989 mbar 75 mph, 991 mbar 150 mph, 930 mbar 160 mph, 929 mbar 175 mph, 902 mbar 180 mph, 895 mbar 185 mph, 882 mbar Duration periods are from development to dissipation. Intensity is the highest recorded mile per hour and the lowest recorded atmospheric pressure in millibars. During the 2008 Hurricane season, Collier County's shoreline was impacted by several storms. Of these storms, Tropical Storm Fay had the greatest impact upon the shorelines due to the storm making landfall several miles south at Cape Romano. Fay adversely affected the shoreline near Collier County and accounted for approximately 175,000 cubic yards of erosion. CAC June 9, 2011 VIII-1 New Business 17of112 The significance of the storms mentioned above relate to the amount of volume placed on the beach for the 2006 Renourishment Project. Due to the active season in 2004/2005, the permitted design was not capable of fully addressing all the erosional losses that occurred due to template restrictions imposed for hardbottom avoidance. Therefore, the beach renourishment project was not able to fully address the sand deficit at some profiles or anticipated long term storm impacts, which affected the performance of the recently placed sand. Groins Traditional methods of looking at hot spots, such as beach width standard and high erosion rates were described above, but often features such as groins can have impacts totally missed by normal 1,000 foot spacing of monitoring line surveys. From historical shoreline analysis, it can be seen that groins playa large role in affecting the width of the shoreline. In some areas of Collier County, the impact of coastal structures have a limited range, but an important effect. On Naples Beach, there are many structures along the coast between Doctors Pass and Gordon Pass. There are no groins on Vanderbilt Beach or Barefoot Beach. Park Shore has three small groin-like structures in the vicinity of Seagate Drive (R-45). Depending on the dominant wave direction, the groins within Naples can influence the perception of the amount of shoreline remaining in close vicinity to the structure (Refer to Photograph 1a and 1b). If the wave direction is predominantly from the north for a period of time, a fillet will form on the northern, or up drift, side of the groin and a deficit will be created downdrift. If the wave direction were to change and become predominant from the south, the up drift and downdrift areas would reverse, causing the previously accreting shoreline to become erosional while the previously eroding shoreline trends toward accretional. It is not readily apparent if removing all the structures along the CAC June 90 2011 VIII-1 New Business 18of112 Naples shoreline will help or hinder shoreline performance, or if the groins just need to be modified to support better performance of the beach. An in-depth modeling study is underway in order to better determine shoreline response to removing the structures and supplement the analysis in this report. A comparison between a 2004 Lidar contour map and the 2009 aerial photograph (figure 7) shows a reversal in alongshore transport at the groins. The size of the opposing offset at outfall #2 (Figure la and 1b) indicates there is a strong refraction-diffraction effect on Naples beach caused by the shape of the nearshore hardbottom and the bathymetric high that extends offshore from northern Naples Beach. Any modification to the lengths of the groin/outfall combination needs to balance the beach offset versus the stabilizing influence of the structures. Since the amount of sand that can be placed is restricted by the hardbottom locations, the groins can substitute for advanced nourishment. Given the combined inlet, near- and far shore-geomorphology and wave climate influences in this region, it is difficult to say they should be modified, since groins have a stabilizing influence in this hard to maintain stretch of beach. Some groins were retained and repaired with the 1995/96 project, since they contributed to beach stability. They were retained for the 2006 project for the same reason. Nourishment largely mitigates for groin impacts by substantially maintaining desired beach widths, but a modified, removed, or a groin replaced with another type of structure might eliminate the need for expensive sand. Also, once eliminated, a structure may be hard to re-permit. Supplemental Fill In addition to the construction volumes and inlet bypassing, a portion of the of sand that has been added to the project area beaches by various truck haul, or supplemental fill projects. During the 1996 to 2004 time period, a significant amount of fill was placed within the project areas. This supplemental fill helped extend the life of the 1996 project by acting as advanced nourishment, especially in hot spot areas. From 1996 through 2003, an estimated 394,000 cubic yards of sand was added to the beaches between Wiggins Pass and Gordon Pass from truck haul and inlet bypassing (Collier County, 2003). Approximately 144,000 cubic yards of this volume was added in 2002. No inlet bypassing or truck haul operations are known to have occurred during the time period between June 2003 and May 2004. These supplemental fill operations significantly added to the stability of the project area beaches during that time period. From 2006 to 2008, no truck haul projects occurred within the project area. The only source of supplemental fill during this time period is that from inlet maintenance dredging. In 2007, both Clam and Wiggins Passes were dredged. At Wiggins Pass, approximately 6,800 cubic yards of sand were placed updrift at R-12, and 48,400 cubic yards were placed downdrift at R-18 and R-19. At Clam Pass, approximately 20,000 cubic yards were placed downdrift and R-42 and R-43. CAC June 9, 2011 VIII-1 New Business 19of112 From 2009 to 2011, several supplemental fill projects occurred within or on the boundaries of the project area. In 2009, both Doctors Pass and Wiggins Pass were dredged. The 2009 Wiggins Pass maintenance dredging project removed approximately 49,600 cubic yards of sand from Wiggins Pass and placed it in a spoil site nearshore of Barefoot Beach State Preserve (between approximately R-11.4 and R-14.2) and Delnor Wiggins State -Park. At Doctors Pass, approximately 36,000 cubic yards of sand was removed and placed in a nearshore area south of the inlet, between FDEP reference monuments R-60 and R-62 at Lowdermilk Park. Wiggins was also dredged in March of 2011. Approximately 50,000 cubic yards of material were dredged and placed on Barefoot Beach to the north between R-12 and R-14.2. In July 2010, a small truck haul project took place just south of Doctors Pass. Approximately 2,652 cy (3,712 tons) of sand were placed on the beach. The sand was kept landward of the MHW line during construction. In early 2011, a truck haul project was performed south of Doctors Pass at R58A-400 to R58, which placed 22, 393 cubic yards of sand. In addition to the Doctors Pass sand placement, Park Shore (R-45+600 to R-46+400) also received 7,836 cubic yards of material from an upland sand source. This sand was placed to address erosional hot spots that have appeared during the recent project's monitoring. Hardbottom Constraints A major concern when designing the renourishment project in 2006 for Collier County is adverse effects to the nearshore hardbottom habitat. Hardbottom coverage is undesirable to both the County and FDEP. In order to avoid coverage, constraints have been placed on the design template, which impacts the width and renourishment interval of the project. These constraints appear to have been be overly cautious based on the performance of the high quality sand placed in 2006. There is room for increased width with a safety buffer. The hardbottom has been annually surveyed nearshore using side scan survey techniques between 2005 and 2009. The nearshore hardbottom has been diver investigated, and the results of dives confIrm the line established by side scan survey results. In the nearshore region, hardbottom coverage or encroachment can occur at selected locations based on the needs for a project life of 6-10 years. Even with the added space created by the high quality sand, there are still profiles where no or little sand can be added using a similar sand quality. At these locations, the equilibrium toe of fill or depth of closure is at or near the edge of hardbottom with insufficient space to place the sand needed for a longer project life. The locations of potential coverage are listed below: Vanderbilt N. Park Shore Park Shore Naples R-31 R-45 to 48 R-50, 51, 53 R-58, 58A CAC June 90 2011 VIII-1 New Business 20of112 These profiles need to be supplemented with other design techniques to achieve the desired design life. This can include structures, supplemental fill or feeder beach. These methods will be examined during modeling and detailed design. Management Changes Shoreline management changes have been implemented from the 1996 to 2006 renourishment projects. During the lifespan of the 1996 project, sand dredged from Doctors Pass was placed downdrift of the pass near monument R-58 (Figure 6). Since the construction of the 2006 project, the sand dredged at Doctors Pass was placed on Lowdermilk Park's shorelines (R-59 to R-62). The effect of placing the fill farther south becomes apparent when historic shoreline rates are compared for the area near R-58. The lack of fill placed at or near R-58 has created a sand deficit at the R-monument, which is apparent when looking at historic volume and shoreline changes. Placing some of the dredged sand immediately downdrift of Doctors Pass should be re-considered in order to reduce erosion rates or a structural solution may be necessary. A second area where management changes are proposed is at the Barefoot Beach shoreline north of Wiggins Pass. This issue is currently being addressed under the Wiggins Pass Channel Realignment and Inlet Management Study. Additional Effects The performance of the shoreline in Collier County is also dependent on the position of the hardbottom with respect to the beach. From historic shoreline analysis, areas that have gaps in the nearshore hardbottom tend to have higher erosion rates than shoreline with continuous hardbottom in the vicinity. An example of this gap influenced erosion is near monuments R-44 to R-46 and between R- 61 and R-62. Without the hardbottom to stabilize the sediment transport in these areas, waves can more easily move sediment from the beach to the offshore. X. HOT SPOT ANALYSIS Several "hot spots", or areas with higher erosion rates and thinning recreational beaches, were identified witlrin Collier County. Some of these hot spots have persisted since the 1996 project, while others have evolved over time. The hot spots were identified based upon beach width maintained (Figure 2), areas of high erosion (Figure 6), and areas in close vicinity to coastal structures (Figure 7). Based upon this criteria, there are six areas of concern within the project area, with other minor areas being that can be more easily managed. North Wiggins Pass The area north of Wiggins Pass extending from monument R-14 to R-16 (Barefoot Beach) is currently an area of high erosion. Since 1992, this area has eroded on average approximately 224 feet and has lost approximately 240,000 cubic yards of material. The combined rates of high erosion and recession are caused by inlet effects and warrant CAe June 9, 2011 VIII-1 New Business 21of112 attention (Photograph 2a and 2b). The erosion at this site is currently being addressed in the Wiggins Pass Channel Realigmnent and Inlet Management Study. Recent dredging events have placed sand near this hot spot as an interim measure. This reach is being considered for inclusion in the next beach renourishment project. This reach is located outside of the 2006 project limits, but can be most economical nourished as part of the larger project. - Photograph 2a (left) and 2b (right). March 2010 South of Wiggins Pass The area immediately south of Wiggins Pass, Delnor Wiggins State Park, has a historic erosional trend, which has been mitigated with sand dredged from Wiggins Pass since 1985. This area has higher erosion rates in part due to the dredge spoils placed in the area combined with the hardbottom in the region. Overall since 2006, the area between R-18 and R-20 has lost approximately 10,000 cy/yr when the filled placed from dredging has been accounted for, but has maintained its shoreline width (Figure 6). Again, like the area north of Wiggins Pass, this site is being addressed in the updated Wiggins Pass Inlet Management Study. Vanderbilt Beach Since 1996, the area in the vicinity ofR-27 in Vanderbilt Beach has experienced elevated erosion and is nearly violating the design standard. Since 2006, the shoreline within this area has eroded approximately 27 feet, and has also experienced an erosion rate of approximately 2,000 cubic yards per year. This area of erosion was present prior to 2004, and there appears to be a shift in the peak erosion to R -30. There is a gap in the CAC June 9, 2011 VIII-1 New Business 22of112 hardbottom located offshore of R-27 (Photograph 3) in combination with hardbottom veering closer to the shoreline just south of this point, which aids in sediment loss through the gap offshore. Modeling is currently underway to better understand reef gaps, such as the one that occurs here and their effects on neighboring shorelines. Photograph 3. North Vanderbilt Beach Hot Spot vicinity R-27, which is influenced by a gap in the reef, followed by harbottom line close to shore. Pelican Bay The Pelican Bay shoreline between R-34 and R-36 does not meet the project beach width standard, but its shoreline and volume change rates are relatively stable or accretional since 2006. Prior to construction of the reach, several storms impacted the shoreline in late 2005, which were not fully addressed by construction. Therefore, sufficient sand could not be added to restore the shoreline to its pre-storm condition plus its new design width. The nearshore hardbottom has a significant influence in this region, since it is close to shore with more relief than other areas. The reach appears to be performing well at a smaller beach width. It may be able to maintain itself as a smaller beach width due to its relative stability at its current width and for being downdrift of Vanderbilt Beach project. South Clam Pass This hot spot stretches south from Clam Pass. The hot spot is likely caused by natural inlet impacts, inlet dredging, and the combination effect of close nearshore hardbottom followed by a hardbottom gap starting at R-44. The hardbottom characteristics are similar to that offshore of Pelican Bay. This hot spot is not part of any beach erosion control program. Over the past year, the area between R-42 to R-44 has experienced approximately 8,000 cubic yards of erosion. This area should be considered as an addition to the North Park Shore Reach for beach nourishment, with fill extending down to R45 south of Seagate Drive. An inlet study is currently underway to renew the permit CAC June 9, 2011 VIII-1 New Business 23of112 for dredging Clam Pass and maintaining the Clam Bay System, and this may ,address some of the down drift erosion caused by the inlet. North Park Shore The region between monuments R-45 and R-46 in North Park Shore (Photograph 4) is a newly developed hot spot. It was partially nourished in 2006, but not in 1996. Prior to 2004, this area was accretional. The nearshore hardbottom is in close proximity to the shoreline. This hot spot was recently nourished with truck haul sand in an area that was losing approximately -3.3 cubic yard per foot per year, which was most likely exacerbated by the 2004/2005 hurricane season and nearby groins. There may be a contribution from being downdrift of the Clam Pass Park hot spot, whose nourishment could moderate this new erosion trend. Photograph 4. South Clam Pass and North Park Shore Hot Spot, at R-42 to R-44 and R-45 to R-46, respectively. Park Shore The region between R-51 and R-53 (photograph 5) has been an area of higher erosion and narrowing beach since 1996. Since 2006, this area has lost approximately 14,500 cubic yards of material. The shoreline at R-51 is still above the design criteria of 85', but at R-52 and R-53, the shoreline is below or at 85' of design width. Since construction, the shoreline at this location has retreated an average of 45 feet. A gap in the hardbottom occurs at R-52 along with a close edge of hardbottom to the south, which tends to cause higher erosion rates. CAC June 90 2011 VIII-1 New Business 24of112 Photograph 5. Park Shore Hot Spot at R-51 to R-53 South Doctors Pass The area downdrift of Doctors Pass (Photograph 6) has experienced a high rate of erosion since the first nourishment project in 1996, and it is difficult to maintain a 100 foot beach width in these conditions. The fill density and template were enlarged with the 2006 project in an attempt to address this issue. The erosion that is presently occurring south of the Pass is most likely due to a change in inlet management. Prior to 2005, fill dredged from the inlet was placed downdrift of the pass, which helped to reduce erosion rates. Since 2005, fill has been placed in the nearshore of Lowdermilk Park, which has caused a deficit of sand from R-58A to R-59, partially exposed by ebb shoal shrinkage. In addition, the FDEP limited fill quantities to avoid coverage of nearshore harbottom. The hot spot currently extends from the jetty to R58, and has lost approximately -5.9 cubic yard per foot per year, or approximately 9,000 CY per year. Photograph 6. Naples Beach hot spot area showing Indies West, Gulf View BeachClub, and The Chateau of Naples south of Doctors Pass. CAC June 9, 2011 VIII-1 New Business 25of112 South Lowdermilk Park The area to the south of Lowdermilk Park near R-62 and R-63 (Photograph 7) is another hot spot. This area contains the Naples Resort. Since 2006, the area near the two R- monuments has retreated on average 35 feet. Volumetrically, this area has lost approximately 16,000 cubic yards since 2006. This area is downdrift of the location where sand is placed offshore at Lowdermilk Park during maintenance dredging of Doctors Pass, which may account for part of the increased erosion. The shoreline is also affected by groins within the vicinity. The nearshore disposal for sand dredged at Doctors Pass, groins, and a reef gap followed by a veering of hardbottom closer to shore are influencing the hot spot. Photograph 7. South of Lowdermilk Park Hot Spot at R-62 to R-64. South Naples Beach The edge of the continuous hardbottom ends near R-66. North of this R-monument, the hardbottom acts as a mechanism to keep the sand within the active beach profile, except where significant gaps occur. South of this area, the sand is more easily swept further offshore by storm waves and currents. The area in South Naples that is most affected between monument R-70 and R-72. Since 2006, this area has experienced approximately 10,000 cubic yards of erosion, but this is a reduction from the 1996-2004 trend. Although this area has experienced a higher erosion rate since 1996, sufficient sand was placed during the last project to maintain a healthy shoreline width (Figure 2). CAC June 90 2011 VIII-1 New Business 26of112 Photograph 8. South Naples Beach Hot Spot - Moderately high erosion but good beach width. XI. BORROW AREA CHARACTERISTICS Borrow Area T1 is proposed for use in the upcoming renourishment project. Borrow Area T1 was used for the 2005/6 renourishment project and is located 33 miles from Vanderbilt Beach. From studies performed during the last renourishment, the sediment within the borrow area is characterized by light-gray (5Y 7/1), fine grained quartz sand. The shell content ranges from 1 % to 18%. The silt content is 1.7%. Both the shell and silt contents generally increase with depth. The sand is moderately to poorly sorted, which was found to be 0.92. The mean grain size was found to be 0.32~. These values were determined using the moment method. For areas with fmer native sand and no nearshore hardbottom, such as South Naples or Port Royal, the Cape Romano sand source is a potential source. A design level geophysical and geotechnical investigations targeting the Cape Romano Shoals was completed in 2008, consisting of seismic reflection profiling, sidescan sonar, magnetometer survey, vibracoring and a cultural resources report prepared by a marine archaeologist. Based on the data that was collected, li; sand resource area was developed and divided into Primary and Secondary Areas. The Primary Area contains material having an approximate grain size of 0.24 mm and contains an estimated 900,000 cy of material. The Secondary Area contains an estimated 2 million cy of material having a mean grain size fmer than 0.24 mm with cut depths more difficult to dredge. Final borrow area design and permitting are required before use, although all pertinent information is available. The beach and borrow area characteristics are compared in Table 3. CAC June 90 2011 VIII-1 New Business 27of112 TABLE 3 COLLIER COUNTY RENOURISHMENR PROJECT BEACH AND BORROW AREA CHARACTERISTICS AND COMP ATmILITY Mean Grain Size Sorting Silt Location (PHI) (%) (PHI) (mm) Vanderbilt Beach R-27 2.17 0.22 1.57 4.65 Pelican Bay R-33 1.72 0.30 1.86 1.72 Park Shore R-52 2.51 0.18 0.92 2.61 Naples Beach R-64 2.11 0.23 1.31 1.52 Naples Beach R-73 2.29 0.20 1.31 1.28 Port Royal R-84 1.83 0.28 1.76 1.26 2003 Beach Composite 2.08 0.24 1.50 2.17 See 2010 Beach Composite 1.59 0.33 0.90 Note 1990 Native Beach 1.89 0.27 1.51 2.55 Borrow Area Borrow Areas Volume Toms Hill I (Tl) 1.67 0.32 0.92 1.75 3,570,000 cy Toms Hill I (Tl)-Cut#1 1.59 0.33 0.90 1.65 870,000 cy Cape Romano 2.06 0.24 0.43 1.90 900,000 cy Notes: Approximately 630,000 cy taken from Toms Hill in 2006 based on post-construction surveys. The 2010 beach condition is assumes to have BA Tl Cut 1 characteristics in the fill area R22 to R79. Sand Source Compatibility The compatibility of the borrow areas for renourishment not only depends on fill grain size, but also the slope of the new beach created with this sand. Due to its use during the last renourishment, all of the projects beaches are compatible with Borrow Area T1. It is anticipated that a construction slope of 1 V: 1 OH will result from use of the coarser sand from Borrow Area T1, which is a change from the 2006 construction plans. Only a few of the project area's beaches will be compatible with the Cape Romano sand source. This is due to the finer sand within the borrow area or the possibility that the CAC June 90 2011 VIII-1 New Business 28of112 equilibrium profile resulting from the finer sand from Cape Romano could encroach upon nearshore hardbottom. Both borrow areas contain sands that appear to be similar in color to the existing beach. Native Beach Sand Characteristics The beach sands in the project area are gray fine grained sand with shell based on 2003 samples. The dry beach color is light gray (5Y 8/1 to 5Y 7/1), but the sands become darker on the sub-aerial profile. The sands have been influenced by previous nourishment projects, truck haul sand, and bypassing at inlets. These activities have added moderate quantities of shell, minor rock, and coarse sand from upland sources, which make it difficult to accurately define the engineering qualities of the beach. A number of rock removal projects between 1996 and 2003 have had a visible influence on the beaches of Naples and Vanderbilt. Grain size data has been collected between 1988 and 2003. The alongshore and cross- shore location of beach sampling has changed over time, and a direct comparison among composite values may not be accurate. In 1988, four samples were collected at each profile at elevations between approximately +2 to -5 feet, which may bias a composite towards the high side. In 1990, four samples were collected at each profile at the following elevations: +1.5, -5, -9 and -14/16 ft-NGVD. If the deepest sample is ignored, the sample values may approximate the active beach profile. The 1988 and 1990 samples represent native beach conditions influenced by small fill projects and inlet bypassing activity. The average beach grain size for 1988 and 1990 are 0.32 mm and 0.27 mm, respectively. In 2003, a comprehensive sand sample collection was undertaken, with 10 samples collected across the entire profile at the following elevations: +5, +1.5, MHW, MTL, MLW, -3, Trough, Bar, -6.5 and -9 ft-NGVD. These samples were taken after rocks and shell were removed from the beach and coarse truck haul sand was placed on eroded beaches. The average composite mean grain size for 1998 and 2003 were 0.33 mm and 0.24 mm, respectively. The impact of rock cleaning is evident in these values. Anomalies exist in the historic beach sand data. The 2003 composite mean grain size for Park Shore is 0.18 mm compared to a history in the 0.28 mm to 0.35 mm range. The coarser grain size is the likely characteristic. At Port Royal, the beach shape .in 2003 is flatter than indicated by the sampled grain size. In this case, other data shows this region is being transformed by fill moving down drift from the Naples project. The current implied grain size of the beach is similar to the sand placed during the recent renourishment project, which was 0.31 mm. No recent comprehensive sand sampling has been conducted. CAC June 90 2011 VIII-1 New Business 290f112 xn. OUTFALLS The coastal engineering impact of the 10 outfalls in Naples was characterized by FDEP in their IIIntent to Issuell document on the Collier County Beach Nourishment Project dated December 2004, as follows: "Although these outfalls are adversely affecting the beach by contributing to erosion, impacting turtle nesting habitat, interfering with lateral beach access and degrading water quality, the cost of retrofitting the stormwater system is too great to require removal of the outfalls at this time." TABLE 4 SUMMARY OF OUTFALL CHARACTERISTICS NOMICNAL HISTORIC EROSION PIPELINE INVERT PIPE TOP ADMIN. EI. (Ft No. NUMBER LOCATION IMPACT DIAMETER EI. (Ft NGVD) TYPE and NGVD) CONTRIBUTORY AREA 1 RG-16-1 R60+265' Small- 24 in PVC -0.02 2.11 In Rock Groin for Adjacent Moderate Condo Next to Rock Groin for 2 0-16-1 R62+650' Moderate 2 x 30 in PVC Both -0.14 2.49 hotelo parking lotso Gulf Shore Blvd. and Ponds Next to Rock Groin from 3 0-17-1 R63+535' Moderate 18 in. PVC -0.09 1.54 8th Ave. N. and Gulf Shore Blvd. 4 0-17-2 R64+000o Negligible 18 in PVC -0.66 0.97 7th Avenue North and Gulf Shore Blvd. 5 0-17-3 R65+000' Negligible 14 in PVC .0.23 1.52 6th Avenue North and Gulf Shore Blvd. Small- Residential lots between 6 0-17-4 R65+410' Moderate 2 x 30 in PVC 0.17 &-0.52 2.46 6th and 4th Ave. N., Gulf Shore Blvd. and Lake 7 0-17-5 R66+415' Negligible 24 in PVC -1.22 0.91 3rd Avenue North and Gulf Shore Blvd. 8 0-18-1 R67+400' Negligible 30 in PVC 0.84 3.47 1st Avenue North and Gulf Shore Blvd. 9 0-18-2 R68+430o Negligible 18 in PVC 0.30 1.93 1st Avenue South and Gulf Shore Blvd. 10 0-18-3 R69+000' Negligible 18 in PVC -0.40 1.23 2nd Avenue South and Gulf Shore Blvd. Based on this finding, the following was a FDEP condition in the January 2005 beach permit. Outfall Management Plan. The County shall submit a long-range management plan (including an identification of viable funding sources) for the removal of storm water CAC June 9, 2011 VIII-1 New Business 300f112 outfalls from the beach. Submittal of an acceptable plan will be a requirement of the Notice to Proceed for the second nourishment event. The following three documents were reviewed to evaluate the impacts: 2002 Drainage Reconnaissance Report (CPE 2002), Collier County Contour Map based on 2004 Lidar survey, 1995 Erosion Control Line (on contour map) and September 2009 aerial photographs (Figure 7). Based on these documents, which show all 10 outfalls, the outfall impacts are moderate to imperceptible. There are two strategies for satisfying this permit condition with FDEP: propose no significant changes on the beach but continued upland improvement or propose elimination of all or some of the outfalls on the beach. The City of Naples attempted to satisfy FDEP by proposing the former, but their proposal was not accepted. FDEP did extend the time limit for a plan to the following nourishment project. The outfalls are summarized in Table 4 and shown on Figure 7. The outfalls are associated with coastal structures on the beach. XIll. DESIGN METHODOLOGY AND ALTERNATIVES The 2006 project's monitoring results were utilized to demonstrate how the coarser grain sizes used in the last renourishment performed in a manner consistent with theoretical models of equilibrated profiles, which confirmed the prediction of no further toe advance. With this confirmation of theoretical predictions, the design profiles for the upcoming renourishment can be adjusted appropriately to make the beach wider and higher without increasing risk to the nearshore hardbottom. This additional width and height will provide a degree of storm protection and allow for less frequent renourishment episodes. The beach width design standard was derived from the implied design of the 1996 project. The beach width is 100 or 85 feet from a baseline at the back of the beach to the MHW line. The baseline is at the seawall, edge of vegetation or equivalent, or at the landward edge of the sandy beach. The goal is to maintain this sandy beach width for the design life of the project. The initial design life of 6-years was selected to nrinimize impacts to hardbottom areas. The last alternative considers a lO-year renourishment interval desired by the County. Method The method used to determine fill volumes is based on beach width, erosion rates, hardbottom, and design life. Erosion rate volumes were calculated from the 1996 to 2009 profile data collected from historic monitoring surveys. These erosion rates were combined with required fill need to achieve the design shoreline position, and the total volume for the anticipated renourishment project resulted. The total volume calculated provides for the design width to be maintained for a period of 6 years for Alternative 2 and 10 years for Alternative 3. Sample calculations are provided in Tables 7-9 at the end of this report. The conceptual design did not consider the spreading effects or alongshore transport. There are gaps in the design fill distribution shown in Tables 8 and 9 where no fill is needed based on existing beach width and erosion rates. A sand everywhere design will require additional fill volume and cost. A volumetric summary is provided in Table 5. Barefoot Beach and Clam Pass Park will increase the volumes for Alternative 3 by 192,101 cubic yards (refer to Table 9). CAC,June 90 2011 VIII-1 New Business 310f112 TABLES PRELIMINARY DESIGN VOLUMES FOR COLLIER COUNTY RENOURISHMENT PROJECT REACH DESIGN VOLUME (C.Y.) ALT. 1 ALT. 2 ALT. 3 Vanderbilt 40,000 42,627 59,728 R22 to R31 N. Park Shore 21,000 42,527 51,796 R45 to R48 Park Shore 30,000 100,553 141,500 R49 to R55 Naples Beach 84,000 312,359 428,480 R58A to R79 TOTAL 175,000 498,067 681,503 Alternative 1: FEMA Design The design volume for Alternative 1 is based on the quantity of sand needed to replace storm losses from Tropical Storm Fay. Due to the small amount of fill authorized by FEMA, fill was centered around the areas where the need to restore beach width was the greatest. These fill areas will receive a minimum of 10 c.y.l1.f. of fill, which is the minimum amount of fill that the contractor can practically place. The total volume for the FEMA alternative is 175,000 cubic yards. The breakdown of the location and volume of the fill is described below by reach in Table 7. Vanderbilt Beach The limits for FEMA fill placed on Vanderbilt Beach extend from R-25 to R-29. Vanderbilt beach will receive approximately 40,000 cubic yards of sand which will be centered around R-27. North Park Shore The Park Shore FEMA limits extend from R-45 to R-47. These profiles will receive 21,000 cubic yards offill centered about R-46. Park Shore The Park Shore FEMA limits extend from R-51 to R-53. The design volume for this area is 30,000 cubic yards centered about R-52. CAC June 9, 2011 VIII-1 New Business 320f112 Na?les Beach The fill limits for the Naples Beach FEMA project extend from R-58A to R-65 and R-70 to R-72. In total, this area has a design volume of 84,000 cubic yards. The profiles to the north will receive 64,000 cubic yards of fill concentrated near R-62 to help mitigate losses to Doctors Pass. The area between R-70 and R-72 is also designed to receive 20,000 cubic yards, with fill centered about R-71. Alternative 2: TraditionaI/Existing Design The design volume is based on the quantity of sand needed to re-establish the design berm and provide 6-years of advanced nourishment. The design berm is 100 feet in Vanderbilt and Naples Beaches and 85 feet in Park Shore Beach. In order to reduce volume needed for the proposed renourishment project, Pelican Bay, south of R31, was eliminated from the upcoming renourishment project. The amount of fill needed to bring the historic project areas back to design standard with a six year design life is 498,067 cubic yards (Table 8). Vanderbilt Beach The fill limits of the previously permitted project in Vanderbilt are approximately R-22 to R-31. This area needs approximately 42,627 cubic yards to refill the 2006 design. Park Shore Beach The fill limits of the previously permitted project in Park Shore are approximately R-45 to R-55. Overall this area needs 143,080 cubic yards to bring it back to the intended design standard. Naples Beach The fill limits of the previously permitted project in Naples are approximately R-58A to R-79. Overall, this area needs 312,359 cubic yards to return to its full design intent. Alternative 3: Expanded Design The design volume for the expanded design is based on the quantity of sand needed to widen the berm to provide 10-years of advanced nourishment. The design beach width remains the same as Alternative 2, except as stated below. The area south of Doctors Pass will have design width of 80 feet. This design volume includes raising the berm 1 foot for the expanded design option. The berm will be raised from 4 ft-NA VD to 5 ft-NA VD, but additional analysis will be needed to provide the proper transition the natural beach and berm system. CAC June 90 2011 VIII-1 New Business 330f112 Vanderbilt Beach The fill limits of the Vanderbilt project area are approximately R-22 to R-31. Approximately 59,728 cubic yards is proposed within this project area to expand its design life and raise the berm elevation. Park Shore Beach The fill limits of the Park Shore project area are approximately R-45 to R-55. Overall, approximately 193,296 cubic yards of material is proposed for placement within this reach. This volume is restricted at a few areas due to the close proximity of hardbottom, which wi11limit project life. This may be moderated by a feeder beach to be considered in modeling. Naples Beach The fill limits of the Naples Beach project area are approximately R-58A to R-79. The expanded design within this area requires 428,480 cubic yards of material. The profiles immediately south of Doctors Pass near R-58 can not fit an expanded template needed to support a 10 year renourishment interval due to potential hardbottom impacts. A feeder beach or structures may be a solution to greater sand retention. New Areas Additional areas for extra fill have been identified from an analysis of hot spots within the County. These areas are either outside of the current project limits, or warrant special attention. The two new areas that are proposed for the expanded project are located directly north of Wiggins Pass and directly south of Clam Pass. The Barefoot Beach area is located from R-14 to R-16 and has recently been designated as a critically eroded area by the FDEP. Approximately 70 c.y.ll.f. at each profile, 156,000 cubic yards total, is proposed within this area to supplement fill placed from the maintenance dredging of Wiggins Pass 'and the proposed inlet realignment project. The area south of Clam Pass from R-42 to R-44 is the second proposed expansion area to the Collier County Renourishment Project. Fill to the north of Park Shore will stabilize the area, acting as a feeder beach. Approximately 36,400 cubic yards is proposed within this area. The fill will supplement sand from bypassing at Clam Pass, which is insufficient. The design template will be the same proposed for the Clam Pass dredging project. XIV. COST ANALYSIS The cost of the project is principally a function of distance to the borrow areas, cut depths and shallowness of the nearshore bathymetry, which leads to long pumping distance after the sand has traveled to the submerged pipeline location. Grain size, water depth at the borrow area, and equipment play a minor role. This cost estimate is based on experience derived from the CAC June 9, 2011 VIII-1 New Business 340f112 2005/2006 Collier County Renourishment Project, recent dredge industry practices and a price adjustment of 2.2% per year until 2013-14. Dredge contractors are placing a larger percent of cost in mobilization, and less in the unit cost component. The cost is summarized along with the estimated volumes in Table 6. Given the ever increasing cost of dredging, combined bidding of the Collier County project with a similar regional project from the west coast of Florida could provide a cost savings. TABLE 6 COLLIER COUNTY PRELIMINARY COST ESTIMATE Alt! AIt.2 Alt. 3 100yr FEMA Existing Renourishment Item Unit Unit Cost Design Design Interval Construct Beach Fill Hydraulically Fill Volume c.Y. 174,500 299,406 483,011 I, MobilizationlDemobilization 1.S. $3,700,000,00 $3,700,000.00 $3,700,000,00 Beach Fill 2, Vanderbilt Beach (R22.5-R31) C.Y. $28,00 $1,120,186,32 $1,193,754.55 $1,672,662,21 3. Pelican Bay Beach (R31-R37) C.Y. $31.55 $0,00 $0,00 $0,00 4. North Park Shore Beach (R43,5-R48) C.Y. $31.88 $669,391.54 $1,355,581.61 $1,651,038,29 5, Park Shore Beach (R48-R54.5) C.Y. $26,23 $786,780,92 $2,637,106,08 $3,710,983.36 6, Naples Beach (R58A-R79) C.Y. $30,29 $2,544,761.99 $9,462,848.94 $12,980,709.74 7. Beach Tilling L,F, $0.84 $0,00 $0,00 $0.00 Environmental Monitoring 8, Set Buovs for Pioeline Corridor 1.S, $28,747.50 $28,747.50 $28,747.50 9, Turbiditv Monitoring 1.S, $197,692,66 $197,692,66 $197,692.66 Offshore Sea Turtle Monitoring (Hopper Dredge only) 10. MobilizationlDemobilization of Turtle Trawler 1.S. $4,233,83 $4,233,83 $4,233,83 11. Relocation Trawling PER DAY $3,500.00 $65,324,04 $185,918.20 $254,391.99 12, Endangered Species Observer PER DAY $579,08 $10,807,96 $30,760.43 $42,089.52 13. Payment and Perfonnance Bond L,S, $91,279,27 $187,966.44 $242,425.49 SUB-TOTAL - Original Reaches $9,219,206.02 $18,984,610.24 $24,484,974.58 Additional Reaches 14, Clam Pass Park C.Y. $31.71 $1,154,354.56 15, Barefoot Beach c.Y, $28,00 $4,368,726,64 New Reaches Sub-total $5,523,081.19 10% Contingency $921,920,60 $1,898,461.02 $2,448,497.46 OTAL $10,141,126.62 $20,883,071.26 $32,456,553.22 NOTE: 1,) Preliminary Cost Estimate does NOT include the cost for engineering, pennitting, monitoring, and construction management. 2,) Prices are extrapolated from the 2006 Collier County Project prices, XV. MODELING The purpose of this study is to evaluate the effectiveness of existing structures and beach fill design templates, and changes needed to solve hot spots and improve project performance and durability. Beach fill alternatives with a higher and wider beach berm will be evaluated through modeling with structural modification to achieve these goals. These segments are located at CAC June 90 2011 VIII-1 New Business 350f112 Vanderbilt Beach, Park Shore and Naples. The work will be completed in three phases consisting of 1) the development of a sediment budget, conceptual fill designs and cost estimate (provided in this report), 2) a numerical modeling study of coastal processes and shoreline change (preliminary results are shown at the end of this report in Figure 9) and 3) integration of the numerical model to evaluate structural and non-structural alternatives. Phase three is pending completion of phase 2. The preliminary alongshore transport results are show in Figure 9 below. The areas of increasing transport correspond to hot spots. The clearest agreement is provided south of Clam Pass through northern Park Shore at Seagate public access (R-42 to R-46) and South of Doctors Pass through Lowdermilk Park (R-58A to R-60). The curves also show erosion areas at the Naples Pier (R-74 to R-75), Park Shore (R-50 and R-52) and Vanderbilt Beach (R- 25). The sediment budget (Figure 5) and this curve have differences, which reflects bathymetry and wave climate from different periods of time. Based on the results of preliminary modeling and those described in this report, structural alternatives will be selected to address the problems discovered. The type of structural alternatives can include elimination or modification of existing structures, breakwaters, jetty spurs, permeable groins or T -groins. Pictures of pertinent structures are provided in Photographs 9 through 13 at the end of the report. South Naples currently has T-groins and a pile groin - the latter a type of permeable groins. XVI. PERMIT GUIDANCE The permits from both the Florida Department of Environmental Protection and the United States Army Corps of Engineers are still valid from the previous 2006 renourishment project. It is recommended that if an expanded project is the desired design choice, coordination with permit agencies and permit modifications be obtained as soon as possible. Federal and State permit modifications will be required for the next project, and the existing permits expire in January and November 2005 respectively. Unless construction occurs in the 2013-14 non-sea turtle nesting period, a permit extension, if feasible, will be required from the State. If an extension is determined not to be feasible from the State, then construction should be planned prior to January 2015, before the 2014 sea turtle nesting season. There was strong resistance at FDEP against allowing a larger fill template in 2006 based on a performance analysis presented during the permitting process. Monitoring results since 2006 have shown that the expected performance has materialized. As such, the conceptual design has used this performance to enlarge the cross-sections and increase the project length so that most areas of the project can perform for 10-years. The conceptual design will require a significant detailed design process to consider lateral spreading, intermediate profiles, and the three dimensional nature of the nearshore hardbottom in the project area. Some at FDEP will not readily accept this design process, and some give and take should be expected. XVll. FEDERAL SAND SOURCE COORDINATION The primary sand source for the next project is Borrow Area T-1 located in Federal waters offshore of Sanibel Island. This sand resource is managed by the Bureau of Ocean Energy Management, Regulation and Enforcement (BOEMRE), formally MMS. At a meeting with CAC June 9, 2011 VIII-1 New Business 360f112 BOEMRE at the Annual FSBP A meeting in Clearwater, the agency described their procedures for a new lease. Even though Collier County has previously been given a lease for BA T -1, a new lease will be required for each use of the sand source. In addition, BOEMRE will require a new environmental assessment (EA). BOEMRE is still working out the requirements for a new lease on a previously used s~nd source, and the requirements will be heavily influenced by the Gulf of Mexico oil spill. Colleen Finnegan said that a wave refraction analysis may not be required for the next EA, but did not know the other requirements yet. Based on previous experience, the County should plan on over a year to secure a combined BOEMRE lease and appropriate permit modification, since each Federal agency will wait until the state permit modification is decided before taking action, and BOEMRE will wait on the Federal agency decisions. xvm. NEW INVESTIGATIONS The next nourishment project will require a permit modification and some new offshore investigations. Existing permit conditions will require monitoring which will lead to offshore investigations and environmental surveys. Based on recent experience with the truck haul sand placement project and the Wiggins Pass dredging, biological monitoring of the nearshore hardbottom will be required similar to what was done between 2005-2009. An extension of the project into Barefoot Beach and Clam Pass Park will need to be supported with a pipeline corridors and operational areas to support hopper dredge operations. It may be cost effective to consider adding a dedicated pipeline corridor to Naples Beach south of R-70. Negotiations should be conducted with FDEP and appropriate Federal agencies to determine if monitoring conditions will change from those adopted in 2005. This has been proposed by staff at FDEP for similar projects. XIX. CONCLUSIONS The following conclusions have shaped the preliminary design for the project: · The borrow area from the previous renourislunent project (T1) will be utilized to support the renourishment project. · The coarser sand used during the last renourishment has steepened the beach profile, as expected, and in general, most profiles within the County have experienced retreat at the toe of fill compared to the shoreline location. This means that the permitted template can be increased in size without increased threats to other nearshore hardbottom. This makes a 10 year nourishment interval nearly feasible. · Additional investigations are necessary to permit the next project. · Nourishment alone is insufficient to address the worst hot spot regions. CAC June 9, 2011 VIII-1 New Business 370f112 XX. RECOMMENDATIONS From preliminary analysis of the project, the following are recommendations for future investigation: . Model groins and fill against hardbottom · Identify additional pipeline corridors for hopper and scowl dredges . Begin permit modifications for increased project size · In-depth analysis of proposed design alternatives using 2010 monitoring results at each profile location XXI. REFERENCES Coastal Planning & Engineering, Inc., Collier County Beach Restoration Project 6-Year Monitoring Report (contains Appendix A: Drainage Reconnaissance Report), October 2002. Coastal Planning & Engineering, Inc., Collier County Preliminary Engineering Report, 2003 Coastal Planning & Engineering, Inc., Collier County Beach Restoration Project 8-Year Post- Construction Report, November 2004. Coastal Planning & Engineering, Inc., Collier County Beach Renourishment Project Two-Year Post-Construction Monitoring Report, December 2008. Coastal Planning & Engineering, Inc., Collier County Beach Renourishment Project Post- Tropical Storm Fay Report, October 2008. Coastal Planning & Engineering, Inc., Collier County Beach Renourishment Project Post- Construction Monitoring Report, October 2006. Coastal Planning & Engineering, Inc., 2009 Collier County Annual Topographic and hydrographic Survey Report (September 2009 Aerial Photographs). November 2009 Florida Department of Environmental Protection (FDEP), Joint Coastal Permit for Collier County Beach Renourishment Project. Permit No. 0222355-001-JC. January 12,2005. United States Army Corps of Engineers (USACE). Permit No. SAJ-2003-12405 (IP-MN). November 17,2005. TABLE 7 AItorantivo1: FEMA OESIGN VOLUMES PROFILE EFFECTIVE DESIGN ~! BERM . DEPTH OF COMPo FINAL NUMBER DISTANCE WIDTH ITO Nl HEIGHT ! CLOSURE EROSION VOLUME IFTI IFTl ; , IFT.NAVDI ! IFT-NAVD ICYIYRl ICYl R-l 500 85' 4,O! -11,3 R-2 1,008 85; I 4.01 -11,3 R-3 1.002 85, ! 4,0; -11,3 R-4 1.017 851 i 4,Oi -11,3 0 R-5 1,023 85 4,O! -11,3 0 R-5 1,023 85, i 4,Oi -11.3 0 R-7 1,051 85' , 4,01 -11,3 R-8 1,018 85, I 4.0j -11.3 R-9 1,000 85 ~ -11,3 R-l0 1,025 85 , 4.0j -11.3 R-ll 1,028 85! 4,0; -11,3 R-12 1,033 85' ! 4.01 -11.3 R-13 1,015 85! 4,0; -11,3 R-14 1,012 100' I 4.01 -11.3 R-15 1.038 100 4,0, -11,3 R-15 580 1001 ! 4,O! -11.3 Wlaains Pass 800 ; R-17 660 1001 4,0; -11,3 0 R-18 1,025 1001 ! 4.0j -11,3 -4,715 R-19 1,039 l00! 1 4.01 -11,3 -4,115 R-20 1,030 100; 4,O! -11,3 -1.266 R-21 1,035 l00i i 4.0j -11,3 -843 R-22 100 1001 -24,S! 4,01 -11,3 0 0 R-23 1,017 100. -11.9! 4,O! -11,3 0 0 R-24 1,074 100! -36.2. 4.0! -11,3 0 0 R-25 1.051 100; -24,5; 4,0; -11.3 -1,647 6,000 R-26 986 100! -35.91 4,01 -11,3 -1,321 1,250 R-27 1,095 100' 3.1' 4,0; -11.3 -2,434 12,000 R-28 1,026 1001 -13,3, 4,0; -11,3 -826 1,250 R-29 942 100! -7,2! 4,O! -11.3 -863 5,500 R-30 1,033 100! -14.4i 4,0; -11,3 -556 0 R-31 1,092 100i -32,5, 4.01 -11,3 0 0 R-32 1,011 100' -27.44 4,0, -11,3 0 0 R-33 1,021 100, .6,3i 4,0' -11.3 0 0 R-34 1,012 100~ 7,5i 4,0, -11,3 -398 0 R-35 998 100, 6.01 4,0, -11,3 -l;78 0 R-36 1,028 100' 18,0, 4.0! -11,3 0 0 R-37 1,017 100! 1.8i ".Of- -11.3 -460 0 R-38 1,000 loo! 4.0! -11,3 0 0 R-39 1,015 100, I 4.0; -11.3 0 0 R-40 1,011 1001 4,01 -11,3 0 R-41 689 100' . 4.0i -11.3 0 Clam Pass 350 1 ! I R-42 1,053 85: 4,0' -11,3 -6.433 0 R-43 1.018 851 , 4.01 -11,3 -4.495 0 R-44 ' 1,023 85! 1 4.0! -11.3 -2,950 0 R-45 1.078 85i 21.91 4,0; -11.3 -1.034 6,000 R-46 1.040 851 18,O! 4,01 -11,3 0 9.000 R-47 953 85, -3.9i 4,0' .11,3 .373 6,000 R-48 1,000 85' -2.81 4.01 -11.3 -700 0 R-49 1,077 85. -18.4, 4.0; -11,3 0 0 T-50 1,208 85i -43,2, 4.0! -11.3 0 0 R-51 1,108 85, -13,11 4.01 .11,3 -3,415 7,500 R-52 987 85; 28,0, 4,0; -11.3 -3,945 15,000 R-53 1,050 85; 5.1, 4.0! -11,3 -1,945 7,500 R-54 1,059 851 -8,71 4,O! -11,3 0 0 U-55 985 85; -14,n 4,0; -11,3 0 0 R-58 845 85i ! 4,0, -11,3 0 0 T-57 884 851 ! 4,0, -11,3 0 0 Doctors Pass 431 ! ! , R-58A 877 100' 112,71 4,0' -11,3 -3,457 5,000 R.58 737 80, 35,6! 4,0' -11.3 -5,738 5,000 R-59 1,035 loo! -o,7! 4,0; -11,3 -2,715 7,500 R-60 1,081 loo! -11.6! 4,o! -11.3 -75 8,000 R-61 1,049 100' -42,3, 4,0; -11,3 -785 7,500 R-62 1,015 lo0! 15.o! 4.0! -11.3 -3.219 11,000 R-63 987 1001 11.6~ 4,0; -11.3 -2,701 10.000 R.54 854 1001 -9.5, 4,0; .11,3 -565 5,000 R-l;5 804 1001 -14.5, 4,01 -11,3 -1,168 5,000 R-65 813 100 .25,2, 4,01 -11.3 0 0 R-67 805 100 -51.81 4.0! -11.3 0 0 R-68 810 100, -51,6! ''.OJ -11.3 0 0 R-69 805 100, -3D.3! 4.0j -11.3 0 0 R-7o 800 100; -30,S! 4.0j -11,3 -2,537 5,000 R-71 803 100! -33,21 4,o! -11,3 -3,733 10,000 R-72 807 1001 -51.4! 4.0! -11,3 -1,819 5,000 R-73 813 100! -50,8, 4,01 -11,3 0 0 R-74 803 100' ....1.91 4,01 -11,3 0 0 R-75 795 1001 -39,8, 4,0, -11,3 0 0 R-75 799 100' .7.01 4.0! -11.3 -855 0 R-77 782 100i -11.11 4,0; -11,3 0 0 R-78 933 1001 -14,8! 4,01 -11,3 0 0 R- 9 1.128 -9, ; 4, -11,3 0 0 Gordon Pass I i i I .13.21 PROJECT AREA 41,058 961 4.01 -11.3 -48,427 175,000 0 i i FILL LIMITS AND aUANTITlES ARE APPROXIMATE. 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CCV)U)CDI"-OIDCDOLD CZ)"iI""If",....oo:r OC?OCD MCDomo ......co..,.o "":wN...jci ,....MrDO "~~~ "~~ -5~5~5~5~~5 ..................- 1 1 I I 1 000'0'000000 ..;...;...;...;...;...;...;...;..;..;. liim N''Com-:'-'M Noo:r.n- ';''''':ui'';'uiroir-i'''':';'rJ ~'";l1r;'7 ~'~l1 ~~~~~~~ggg -= Z " ;;; l!j ~ I a ii ~ ~ U c -a' 9 .w i @ f " ~ c c l' c t u I ~ u ~ ~ .:l il 0: CAC June 90 2011 VIII-1 New Business 410f112 GULF OF MEXICO o n= z o .... Cl z :> ::::i 662000 660000 658000 NOTES: 1) NAPLES BEACH OUTFALL LOCATIONS ON SEPTEMBER 2009 AERIAL PHOTOGRAPHS TAKEN BY ACA. o o 450 900 o Feet N W.E S 2) COORDINATES ARE IN FEET BASED ON FLORIDA STATE PLANE, EAST ZONE, NORTH AMERICAN DATUM OF 1983 (NAD83). FIGURE 7. Naples, ,Florida Aerial Photograph with Outfall Location R-21 R-22 R-23 R-24 R-25 R-26 R-27 R.26 R-29 R-3D R-$1 R-32 R'33 ___ R-34 ~ R-35 o R-S6 Z R-37 ~ R-38 R-39 R-4D R-41 R-42 R-43 c: R-44 _Q R-45 m R-46 o R-47 ..9 R-48 C R-4!jl Ql T-SO E R.51 E R-52 ~ R-S3 R-54 ci:. U-55 R-S6 l-57 R-S8 R-S9 R-6D ___ R-B1 .c R-6? 'S R.63 o R-64 ~ R-65 R.66 R-57 R-611 R-e9 R-7D R-71 R-n R-13 - R.74 R-7S R-76 R-n R-78 R-79 R-8D CAC June 9, 2011 VIII-1 New Business 420f112 Net Sediment Transport. 06/0112006 . 07/0112009 R-21 R-22 R.23 R-24 R.25 R.26 R-27 R-28 R-29 R.30 R.31 1<-32 1<.:33 R-34 R-35 R-36 R-37 R-38 R-39 R-4D R-41 R-42 R-43 R-44 R-45 R-46 R-47 1<.46 R-4!,l T-5D R-51 R-52 R-53 R-54 U-55 R-S6 T-57 R-58 R-59 R-SD R-61 R-62 R-Q3 R-64 R-65 R.6l) R.67 R-68 R-69 R-70 R-71 R-72 R-73 R-74 R-75 R-76 R-77 R.78 R-79 R-80 R.81 '5000 "1000 .3000 .2000 .1000 0 1000 Net Sediment Trans ort c. .I r Clam Pass 3.75 3,8 3.85 3,9 3,95 FbEasl NAD83 . Easbng (Il) 4 5 FIGURE 8. Net Sediment Transport CAC June 90 2011 VIII-1 New Business 430f112 w i J I I 510000 GULF OF MEXICO D NOTES: 1. COORDINATES ARE IN FEET BASED ON THE FLORIDA STATE PLANE COORDINATE SYSTEM. EAST ZONE. NORTH AMERICAN DATUM OF 1983 (NAD 83). 1 inch = 2,000 feet LEGEND -INVESTIGATION AREA . 200i ePE vtERACORES . 2008 CPE VIBRACORES C:J PRIMARY SAND RESOURCE AREi'. L_.J SECONDARY SAND RESOURCE AREA - 2008 CPE GEOPHYSICAL TRACKLIIJES o 1,000 2.000 I I Feet FIGURE 9. Cape Romano Borrow Area CAC June 9, 2011 VIII-1 New Business 440f112 Photograph 9. Examples of spurs off jetties at Bakers Haulover Inlet in Miami, FI stabilizing adjacent up- and down-drift beaches. Photographs lOa and b. T-groins with transition to down drift public beach at Upton Beach in Pinellas County, Florida. Public beach is south of condominium. r 'I """'" i ,,"" 'jm(mmc 1 L~~ . ~~ ~~ ..~- ~.' --~ -==.~<: ~ _..-==~~7=~=_;;~'::!.-_ Longboat Key model conditions showing salient growth at detached breakwaters. CAC June 9, 2011 VIII-1 New Business 450f112 Bed !Level [ft] 2 1 o -1 L2 J.3 I -4- .5 .6 -7 -8 -9 -10 Photograph 11 . Longboat Key Permeable Gr~in maintaining beach width in 2010 for years after latest nourishment. CAC June 9, 2011 VIII-1 New Business 460f112 Photograph 12. Parabolic bay shape at T -groins in South Naples ::' ,;. _~'v., ""DO' Photograph 13. Pile groins in South Naples beach area in 2004. CAC June 90 2011 VIII-1 New Business 470f112 APPENDIX A COMPARATIVE PROFILES 1995-2010 Ul Ul .- Cll .-<: 0'- NUl :] mID ~~N ~z:: ".-- ~oo ~=CXl 0>'<1' l- 'D o u z o ~ u o ~ r-. I ~ w z ~ w ~ '-'- o ~ 0... '; L I 01, . / ~ I I " \ \ ~ \ " ~ \ \ ; \ \ : \ 1 . ...r 1, ,.' ( ;' I ) \~ J : '\ f .' '\ I :: V" ~ : ,1: :: ) / ':" '1 r : / ( : : I :.. f \ ~ / I { f / : f J : ':'1 { : :} } !:f I :1 J ~ I { : f: I 'r / 'J' (. E :) /; ;: 1:1 JY It. {: (,( I,: : ." 1 .' ( " 1/ :. . I~ ," I ...' h -......~......... .. ;,.I~. . . , ",," L.. " / \ r---" fII1"'" ,.,. :' ~ ".".-""" , ..... 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N Z W <( o o r') Q) 0 L() ill 0 0 0 0 0 L() 0 0 01 C'J N 0 L() ill ---l ('~ (J) 0l > Z ::J ....; (J) 0l 0 ::J ~ u Z ~ 0 0 o L() e;- 01.- e;[- '- 'J) o o ('..J In '" ......Q) ......c 0'- N '" :J mID Q);;:N cQ)...... ~z:: 0'70 <(=N 05~ o ui o o u Z c=) r- <( Cl o ---l r- ,W,' W 0 LL W o 0 ,-, 0 r- ill w w LL '~ r-: (f) 0 0 U) ---t f'. ill r') (J) ---t ill (".j r') N (",I Q) r') o '..0 C'J en LiJ () Z <( "m' 'II" '/I' N o Z W <( II o o r") 0 co I Ul (J) 0 Cl:: lO 0 0 0 0 0 Ul 0 0 (',I ~ W ('" ('J 0 "7 L() ill -.J ('~ ---l Q) (J) > Z :::l 4-' (J) (J) 0 ::J ~ u w Z ---;J 0 ---l L:;:: 0 Cl:: 0.. 0 o L() <;1 01, <; 0 (O^\iN 133.:1) '^3l3 e;- 0[- e;L- CAC June 9, 2011 VIII-2 New Business 1of4 EXECUTIVE SUMMARY Recommendation to approve Humiston & Moore Engineers proposal for Collier County Beaches and Inlets Annual Monitoring for 2011 and 2012 under Contract 08-5124 for a not to exceed amount of $183,367.50. OBJECTIVE: To process Work Order with H&M for Collier County Beaches and Inlets Annual Monitoring for a not to exceed amount of $183,367.50 CONSIDERATIONS: Annual monitoring of Collier County Beaches is required by FDEP. H&M has provided the attached proposal under Contract 08-5124 for a not to exceed amount of $183,367.50. The following is the funding breakdown per H&M proposal: 1. 2. 3. Conduct annual monitoring survey in July 2011; Data Collection Prepare the annual 2011 monitoring report; Analysis and Report Budget Conduct the annual monitoring survey in May 2012; Data Collection Budget Prepare the annual physical monitoring report for Wiggins Pass and Doctors Pass; Analysis & Report Budget Rectified aerial Photography to meet FDEP specifications; Budget H&M coordination services $37,400 (LS) $41,700 (T&M) $30,395 (LS) $47,000 (T&M) $22,872.50 (LS) $4,000 (T&M) 4. 5. FISCAL IMPACT: The Source of funds is from Category "AU Tourist Development Tax. Budget is available for the project in Fund 195. GROWTH MANAGEMENT IMPACT: There is no impact to the Growth Management Plan related to this action. LEGAL CONSIDERATIONS: This item has been reviewed by the County Attorney's Office, requires majority vote, and is legally sufficient for Board action. - CMG RECOMMENDATION: To approval H&M proposal for Collier County Beaches and Inlets Annual Monitoring for 2011 and 2012 under Contract 08-5124 for a not to exceed amount of $183,367.50. PREPARED BY: Gail Hambright, CZM HUMISTON & MOORE ENGINEERS CAC June 9, 2011 V111-2 New Business 20f4 COASTAL ENGINEERING DESIGN AND PERMmlNG 5679 STRANO COURT NAPLES, FlORIDA 34110 FAX:239 594 2025 PHONE: 239 594 2021 May 24, 2011 Gary McAlpin, Coastal Zone Management Collier County Public Utilities Engineering Department 3301 EastTamiami Trail, Building H Naples, FL 34112 Re: Proposal for Collier County Beaches and Inlets Annual Monitoring for 2011 and 2012, H&M File No. 21-024, Collier County Agreement 08-5124 Dear Gary: Pursuant to our discussion this morning, we are providing this revised proposal for physical monitoring to cover combined tasks for both beaches and inlets, for both 2011 and 2012. The 2011 tasks will include Vanderbilt, Park Shore, and Naples Beaches, and the 2012 tasks will include Wiggins Pass, Doctors Pass, and the South Marco project including the G and K profile lines along Caxambas Pass, but excluding the Caxambas Pass borrow area which is not required by permit to be surveyed in 2012, The scope of work under this proposal is as follows: 1. Conduct the annual monitoring survey in July 2011 for the Collier County Beach Renourishment Project consistent with the monitoring plan approved by the Department of Environmental Protection. This scope of work consists of FDEP monuments R-23 to R-89 (including R-58A) upland and offshore profiles. Data collection (SDI)................................$ 37,400 (LS) 2. Prepare the annual 2011 monitoring report for the Collier County Beach Renourishment Project as required by regulatory agencies. This task includes preparation of data plots and contour maps from the survey data, analysis of physical changes that have occurred in the readjustment of the beach fill, documenting current conditions in comparison to post construction conditions, computation of volume changes and changes in shoreline position. One combined report will be prepared; two hard copies and one CD will be provided to the DEP and 1 hard copy and one CD will be provided to the County. Analysis and Report Budget.................... $ 41,700 (T&M) 3. Conduct the annual monitoring survey in May 2012 for Wiggins Pass consistent with the monitoring plan approved by the Department of Environmental Protection. This scope of work consists of FDEP monuments R-10 to R-22, Wiggins Pass stations -2+00 to 15+00, and C1 to C34 (65 profiles). Conduct the annual physical monitoring survey of Doctors Pass. This survey scope, to be conducted in May 2012, consists of channel profiles ECO+OO to EC15+70, EO+OO to E6+59, Ell+63 to E17+51, WO+OO to W19+51, turning basin profiles E6+78 to Ell+35, and TB1 to TB4. Conduct the annual. physical monitoring survey of South Marco. This survey scope, to be conducted in summer 2012, consists of FDEP R-Monuments R-139 to R-148, G-1 to G-5 (groins), and K-1 and K-2 (17 profiles). Page 1 of2 CAC June 9. 2011 VIII-2 New Business 30f4 Data Collection Budget (501)...................$ 30,395 (LS) 4. Prepare the annual physical monitoring report for Wiggins Pass and Doctors Pass as required by the regulatory agencies. This task includes preparation of data plots and contour maps from the survey data, analysis of physical changes that have occurred in the readjustment of the beach fill and the beach response to inlet dredging activities, documenting current conditions in comparison to post construction conditions, computation of volume changes and changes in shoreline position. Prepare the annual physical monitoring report for 50uth Marco as required by the regulatory agencies. This task includes preparation of data plots and contour maps from the survey data, analysis of physical changes that have occurred in the readjustment of the beach fill and beach response to the erosion control structures, documenting current conditions in comparison to post construction conditions, computation of volume changes and changes in shoreline position. Three individual reports will be prepared; 2 hard copies and one CD will be provided to the DEP and one hard copy and one CD will be provided to the County. Analysis and Report Budget....................$ 47,000 (T&M) 5. Rectified aerial photography to meet FDEP specification including survey costs Budget..................................................... $22,872.50 (LS) H&M coordination services ........................................................... Budget $4,000.00 (T&M) TOTAL SERVICES S183.367.50 Please note that the above services costs are approximately 49% subconsultant services for surveying and data collection and 51% H&M professional services for coordinating sub consultant activities, processing data, computation of quantities, data analysis and plots, and preparation of data and documents for submittal to the regulatory agencies. If the regulatory agencies require additional services not listed above, and the county requests that H&M provide those services, such services would be provided as Additional Services to be billed on a time and materials basis in accordance with the fee schedule that is included as part of the existing referenced Agreement, or the budget for any Additional Services tasks will be negotiated separately as deemed necessary, and a budget amendment will be requested. Sincerely yours, HUMISTON & MOORE ENGINEERS '" ,/ c./_ /{ a.s-,. ;;:'/~-.;-n tS r--o-z-::, Kenneth K. Humiston, P.E. Page 2 of2 on on ~IIl ~c: 0- ",on ::> cnm III ~ C:IIl -=lZ u"'''' <(~'O U>'" '" .5 E 'E ~ .. ~ :t~ "0 Gi'" :E'g .. .. ,,~ -50 ill'" m ~ .3 ~ " U ..", o .. u .. -.... ~'O .... f-- 1- I- '0 ~g~ e....... SLt~ l!! ::> <=0 :i! 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CAC June 9. 2011 VIII-3 New Business 10f6 EXECUTIVE SUMMARY Provide the CAC with a conceptual design update for Marco South beach along with the Emergency Dredging at Collier Creek. OBJECTIVE: To provide update to the CAC. CONSIDERATIONS: Coastal Engineering Consultants, Inc. has provided updates on South Marco and Hideaway for the CAC. ADVISORY COMMITTEE RECOMMENDATIONS: FISCAL IMPACT: N/A GROWTH MANAGEMENT IMPACT: There is no impact to the Growth Management Plan related to this action. LEGAL CONSIDERATIONS: This item has been reviewed by the County Attorney's Office, requires majority vote, and is legally sufficient for Board action. - CMG RECOMMENDATION: For information only. PREPARED BY: Gail Hambright, eZM _"-.f~W11'~'f~T~~ re, r [rt, (....-1.. '-.. ,r~Lr, ~/' . ~_~')_ "1"" ' .... ~...:t,"h ,t1~i ;, ,",JJ~" c; .ILC.C"r..u.,i.!Ct,J" ~ ~I" ~. 1-"" : :Z;E} J!~'~ <.....!;.... 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