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November 9 2016 Meeting Package Minutes
9 November 2016 Meeting Minutes Chairman Barbour called the Port, Waterway & Beach Commission (PWBC) meeting to order at ~4:00 and introductions were made by each; the meeting’s attendance sheet is attached. The October meeting minutes were approved. Chairman Barbour reminded the PWBC of the upcoming NC Beach Inlet and Waterway Association’s (NCBIWA) annual meeting. The meeting will be held on Wrightsville Beach thth at the Blockade Runner on November 14 and 15. Staff reminded all that NCBIWA sponsorships are at the fiscal discretion of each municipality. The Chair provided a brief overview of the annual Atlantic Intracoastal Waterway meeting agenda; the Chair will be representing NCBIWA at that meeting next week in Virginia. Staff reminded the PWBC of the 7Dec2016 NC Division of Water Resources/US Army Corps of Engineers (USACE) shallow draft inlet quarterly meeting in New Bern. Abbreviated Current Efforts: New Hanover County’s (NHC) Wrightsville Beach (WB) Coastal Storm Damage Reduction (CSDR) Project NHC has provided a Notice to Proceed initiating the FY18 Plans and Specifications contract. These Plan B efforts are in the event we have to locally implement the WB CSDR in the fall of 2017. Mason Inlet Relocation Project (MIRP) NHC received five bids for this USACE mandated maintenance dredging event of the Atlantic Intracoastal Waterway (AIWW) crossing at Mason Creek. An apparent low bid has been determined and the bidding specifics will be shared following the Board of Commissioners’ decision on 14Nov2016. Carolina Beach Inlet, Permit Modification A NC Division of Coastal Mgt. pre-application submittal meeting was held on 3Nov2016. Application edits have been made hopefully addressing USACE regulatory concerns. Once the application has been executed and the processing fee check is cut, the application package will be transmitted to NCDCM for circulation/comment through the applicable state and federal resource agencies. Carolina Beach Inlet, Maintenance Dredging A ten day Merritt event concluded on 25Oct2016. NHC was notified that the hopper dredge Currituck will be used in the upcoming January maintenance event. The USACE posted surveys can be accessed at the USACE’s website below. http://www.saw.usace.army.mil/Missions/Navigation/HydrographicSurveys/InletsCrossings.aspx 2016 Shoreline Mapping Presentation Nicole Vanderbeke and Robert Neal engineers with Moffatt & Nichol (M&N) presented an overview of the 2016 Shoreline Mapping Program. Staff provided each beach community’s representative a copy of the 2016 Mapping Report. The M&N presentation is attached. The meeting was adjourned at ~4:55. November 9, 2016 Presentation Outline Project Methodology Survey Transects Sub-Reach Delineation Survey Data Acquisition Analysis Procedures Key Events: March 2015 -May 2016 Storm Activity Maintenance Activity Summary of Findings Background Erosion Rate Analysis Results Shoreline Elevation Change • Volume Change • Overall Summary Q&A/Discussion Project Methodology Survey Transects Surveys To Be Completed Each Year in Spring/Summer Timeframe Remove Seasonal Differences Obtain Pre-Storm Conditions Before Hurricane Season Extend All Lines Out to ~-30’ NAVD88 to Track Sand Movement Out to Closure Collected Along 7 Survey Reaches: Mason Inlet Relocation Project –14 Profiles (~500 and 1000 ftspacing) Wrightsville Beach –29 Profiles (~ 1000 ftspacing) Masonboro Island –22 Profiles (~ 2000 ftspacing) Freeman Park –10 Profiles (~ 1000 ftspacing) Carolina Beach –23 Profiles (~ 500 and 1000 ftspacing) Kure Beach –21 Profiles (~ 500 and 1000 ftspacing) Fort Fisher –19 Profiles (~1000 ftspacing) Project Methodology Sub-Reach Delineation Wrightsville Beach Mason Inlet Grouped Transects Within (Transects 1 Each Survey Reach Based On: Profile Characteristics (Dune Height, Berm Width, etc.) Historical Maintenance Placement Locations Presence of Structures (Jetties, Revetments, etc.) Project Methodology Sub-Reach Delineation Sub-Reach (Profiles)Reach Length (ft)Start PointEnd Point MIRP F8 - South (5-14) 9,500Beach Road SouthBridge Rd MIRP F8 - Mason Inlet (1-4) 2,000Mason InletBeach Rd South Wrightsville Beach - Mason Inlet (1-7)5,631Mason InletDuneridge Condos Wrightsville Beach - North (8-17)9,923Duneridge CondosBlockade Runner Beach Resort Wrightsville Beach - South (18-24)6,149Blockade Runner Beach ResortNorth Jetty Wrightsville Beach - Masonboro Inlet (25-29)2,558North JettyMasonboro Inlet (radial transects) Masonboro Island - North (1-6)10,002South JettyQuarter of Island Masonboro Island - Central (7-12)11,653Quarter of IslandHalf of Island Masonboro Island - South (13-22)17,638Half of IslandCarolina Beach Inlet Freeman Park - Carolina Beach Inlet (1-4)3,110Carolina Beach InletCarolina Beach Inlet (radial transects) Freeman Park (5-10)5,510Carolina Beach InletFreeman Park Carolina Beach - North (1-5)2,838Freeman ParkRock Revetment Carolina Beach - Central (6-16)8,248Rock RevetmentCourtyard Carolina Beach Hotel Carolina Beach - South (17-23)7,003Courtyard Carolina Beach HotelAtlantic Towers Kure Beach - North (1-6)6,017Atlantic TowersKure Beach Fishing Pier Kure Beach - Central (7-10)3,731Kure Beach Fishing PierDavis Rd Kure Beach - South (11-21)5,594Davis RdRiggings Condos Fort Fisher - North (1-4)2,461Riggings CondosFt. Fisher Revetment Fort Fisher - Central (5-13)8,842Ft. Fisher RevetmentHalf of Island Fort Fisher - South (14-49)5,496Half of IslandNew Hanover/Brunswick Co. Line Project Methodology Survey Transects & Sub-Reaches Project Methodology Survey Transects & Sub-Reaches Project Methodology Survey Transects & Sub-Reaches Project Methodology Survey Transects & Sub-Reaches Project Methodology Survey Data Acquisition Survey Schedule –Weather Drives When Surveys Are Completed Even Slight Swells Can Impact Ability to Overlap Surveys Within Surf Mason Inlet Relocation Project: June 1, 2016 (GBA) Wrightsville Beach: March 21 -22, 2016 MasonboroIsland: March 21, 2016 Freeman Park: May 23 -24, 2016 Carolina Beach: May 23 -25, 2016 Kure Beach: May 23 -25, 2016 Fort Fisher: May 24 –25, 2016 Project Methodology Analysis Procedures Shoreline Elevation Change Analysis Recreational Berm Elevation = +5.0’ NAVD88 MHW = +1.4’ NAVD88 Volume Change Analysis MHW = +1.4’ NAVD88 (+4.4’ MLLW) Wading Depth = -4.0’ NAVD88 (-1.0’ MLLW) Outer Bar = -14.0’ NAVD88 (-11.0’ MLLW) Closure = -20.0’ NAVD88 (-17.0’ MLLW) Offshore = -30.0’ NAVD88 (-27.0’ MLLW) Key Events 2015-2016 Storm Activity May 2015 –Tropical Storm Ana,Wave Heights Masonboro Inlet Station 41110 Reached +11 ft October 2015 –Hurricane Joaquin, Onslow Bay Gage Masonboro Inlet Station 41110: March 2015 -May 2016 Shows An Event Of Similar 13 Tropical Magnitude to the Winter 12 StormAna 11 Winter Storms Storms 10 9 January/February 2016 – 8 Hurricane Joaquin Winter Storms, Wave 7 (Oct 4 - GageOffline) 6 Heights Reached 9-11 ftOn 5 Several Occasions 4 3 2 1 0 Key Events 6 Maintenance Activity Carolina Beach & Kure Beach CSDR Project: Spring 2016 Carolina Beach: Transects 1 -16 & Transects 22 –23 Approximately 1,004,487 cy • Borrow Area –Engineered Recycling Site Within Carolina Beach • Inlet (Transects 1-16) & Offshore Borrow Area B (Transects 22-23) Kure Beach: Transects 1 –4 & Transects 9 –20 Approximately 540,744 cy • Borrow Area –Offshore Borrow Area B • Key Events 2015-2016 Maintenance Activity Mason Inlet Relocation Project: Winter 2016 Placed Approximately 487,000 cy Engineered Location –Mason Inlet Complex Figure Eight Island Project: Winter 2016 Placed Approximately 75,000 cy Borrow Area –Banks Channel Summary of Findings Background Erosion Rate Calculate Volume Change Above -14.0’ NAVD88 From 2005/2006 -2016 Subtract Out Placement Volumes From 2005/2006 –2016 Annualized Background Erosion Rate = -5.6 cy/ft/yrfor NHC With CSDRWithout CSDR Average Volume Volume Avergage Background Annual Length Placed (cy) Change (cy) Annual Erosion (cy) Reach/Sub-Reach Background (ft)(2005/2006-(2005/2006-Erosion Rate (2005/2006- Erosion Rate 2016)2016)(cy/ft/yr)2016) (cy/ft/yr) Wrightsville Beach-Mason Inlet5,6320-182,541-2.9-182,541-2.9 Wrightsville Beach-North9,9221,731,717161,4281.5-1,570,289-14.4 Wrightsville Beach-South6,1490-39,964-0.6-39,964-0.6 Wrightsville Beach21,7031,731,717-61,077-0.3-1,792,794-7.5 Masonboro Island-North10,0020104,2690.9104,2690.9 Masonboro Island-Central11,653582,207-180,431-1.4-762,638-5.9 Masonboro Island-South17,63883,793-225,276-1.2-309,069-1.6 Masonboro Island39,293666,000-301,439-0.7-967,439-2.2 Freeman Park5,510200,000-516,173-9.4-716,173-13.0 Carolina Beach-North2,838555,348265,7389.4-289,609-10.2 Carolina Beach-Central8,2482,482,227614,4467.4-1,867,782-22.6 Carolina Beach-South7,003674,96888,4951.3-586,473-8.4 Carolina Beach18,0893,712,543968,6795.4-2,743,864-15.2 Kure Beach-North6,017338,12059,2601.0-278,860-4.6 Kure Beach-Central3,73147,76825,6320.7-22,135-0.6 Kure Beach- South5,5941,028,636245,3334.4-783,303-14.0 Kure Beach15,3421,414,523330,2252.2-1,084,298-7.1 Fort Fisher-North2,461037,1921.537,1921.5 Fort Fisher-Central8,8420362,5544.1362,5544.1 Fort Fisher-South5,4960136,2632.5136,2632.5 Fort Fisher536,010 16,79903.2536,0103.2 Total 116,7367,724,783956,2240.8-6,768,559-5.6 Summary of Findings Mason Inlet Relocation Project –Shoreline Elevation Changes ( Recreational Berm (+5.0 ftNAVD88): Average = +92.2 ft( Range = -78.5 ft–157.6 Mean High Water (+1.4 ftNAVD88): Average = +75.1 ft( Range = -26.1 ft–120.6 -100 -90 -80 *Survey Data Provided by the -70 -60 Mason Inlet Preservation Group -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 MIRP F8 -South MIRP F8- 190 Mason Inlet 200 -15+00-5+005+0015+0025+0035+0045+0055+0065+0075+0085+0095+00 Station Shoreline Change at MHW (+1.4 ft NAVD88)Shoreline Change at Berm Height (+5 ft NAVD88) Summary of Findings Mason Inlet Relocation Project –Volume Changes (cy/ft) Above +1.4 ftNAVD88 (MHW): Average = +16.0 cy/ft (Range = -19.5 cy/ft–32.4 cy/ft) Above -4.0 ftNAVD88 (Wading Depth): Average = +33.8 cy/ft (Range = 6.6 cy/ft–62.9 cy/ft) Above -14.0 ftNAVD88 (Offshore Bar): Average = +54.3 cy/ft (Range = -62.6 cy/ft–108.1 cy/ft) Above -20.0 ftNAVD88 (Closure): Average = +54.3 cy/ft (Range = -87.2 cy/ft–118.8 cy/ft) Above -30 ftNAVD88 (Offshore): Average = +62.7 cy/ft (Range = -59.9 cy/ft–135.0 cy/ft) Overall Gain Along the MIRP Survey Reach (MIRP & Figure Eight Projects) Summary of Findings Mason Inlet Relocation Project –Volume Changes (cy/ft) MIRP F8 –Mason Inlet Sub-Reach Experienced Varying Behavior Due to Inlet Effects MIRP F8 –South Sub-Reach Experienced Significant Volume Gains Due To Figure Eight Projects (Approximately 562,000 cy) -100 -90 Volume Change Above -14 ftNAVD88 = 54.3 cy/ft -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 *Survey Data Provided by the 100 110 Mason Inlet Preservation Group 120 130 140 MIRP F8 - MIRP F8 -South 150 Mason Inlet 160 -15+00-5+005+0015+0025+0035+0045+0055+0065+0075+0085+0095+00 Station Volume Change Above MHWVolume Change Above -4 ftVolume Change Above -14 ft Volume Change Above -20 ftVolume Change Above -30 ft Summary of Findings Wrightsville Beach –Shoreline Elevation Changes (ft) Recreational Berm (+5.0 ftNAVD88): Average = -10.8 ft (Range = -72.1 ft–38.7 Mean High Water (+1.4 ftNAVD88): Average = -10.7 ft (Range = -55.5 ft–30.8 ft -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 Wrightsville Beach -South Wrightsville Beach -North Wrightsville Beach -Mason Inlet 80 220+00200+00180+00160+00140+00120+00100+0080+0060+0040+0020+000+00 Station Shoreline Change at MHW (+1.4 ft NAVD88)Shoreline Change at Berm Height (+5 ft NAVD88) Summary of Findings Wrightsville Beach –Volume Changes (cy/ft) Above +1.4 ftNAVD88 (MHW): Average = -1.2 cy/ft (Range = -18.0 cy/ft–9.1 cy/ft) Above -4.0 ftNAVD88 (Wading Depth): Average = -0.9 cy/ft (Range = -24.2 cy/ft–17.7 cy/ft) Above -14.0 ftNAVD88 (Offshore Bar): Average = -10.4 cy/ft (Range = -38.7 cy/ft–15.9 cy/ft) Above -20.0 ftNAVD88 (Closure): Average = -10.5 cy/ft (Range = -37.6 cy/ft–16.7 cy/ft) Above -30 ftNAVD88 (Offshore): Average = -13.7 cy/ft (Range = -37.4 cy/ft–15.5 cy/ft) Overall Volume Loss Along the Wrightsville Beach Survey Reach Summary of Findings Wrightsville Beach –Volume Changes (cy/ft) Wrightsville Beach –Mason Inlet Sub-Reach Experienced Volume Loss Wrightsville Beach –North Sub-Reach Experienced Volume Loss (Erosion of Project) Wrightsville Beach –South Sub-Reach Experienced Volume Gain (Longshore Transport of Project) ) Volume Change Above -14 ftNAVD88 = -10.4 cy/ft(-224,696 cy -50 -40 -30 -20 -10 0 10 20 30 40 Wrightsville Beach -NorthWrightsville Beach -Mason Inlet Wrightsville Beach -South 50 220+00200+00180+00160+00140+00120+00100+0080+0060+0040+0020+000+00 Station Volume Change Above MHWVolume Change Above -4 ftVolume Change Above -14 ft Volume Change Above -20 ftVolume Change Above -30 ft Summary of Findings Wrightsville Beach (Masonboro Inlet) –Volume Change (cy/ Borrow Source For The 2014 Wrightsville Beach CSDR Project Analysis Shows Natural Recovery of Borrow Source Transects 25 –27 Show A Gain of Approximately 125,500 cy Above -30 Wrightsville Beach Transect 27 20 10 Wrightsville 0 Beach (North) -10 Masonboro Island (South) -20 -30 Natural Replenishment -40 Of Material -50 2,6002,4002,2002,0001,8001,6001,4001,2001,0008006004002000 Distance From Baseline (ft) 20152016 Summary of Findings Masonboro Island –Shoreline Elevation Changes (ft) Recreational Berm (+5.0 ftNAVD88): Average = +0.4 ft (Range = -37.2 ft–38.9 ft Mean High Water (+1.4 ftNAVD88): Average = +1.8 ft (Range = -30.9 ft–32.2 ft) -50 -40 -30 -20 -10 0 10 20 30 40 Masonboro Island -North Masonboro Island -Central MasonboroIsland -South 50 400+00375+00350+00325+00300+00275+00250+00225+00200+00175+00150+00125+00100+0075+0050+0025+000+00 Station Shoreline Change at MHW (+1.4 ft NAVD88)Shoreline Change at Berm Height (+5 ft NAVD88) Summary of Findings Masonboro Island –Volume Changes (cy/ft) Above +1.4 ftNAVD88 (MHW): Average = +0.7 cy/ft (Range = -2.7 cy/ft–17.4 cy/ft) Above -4.0 ftNAVD88 (Wading Depth): Average = +0.2 cy/ft (Range = -11.5 cy/ft–41.3 cy/ft) Above -14.0 ftNAVD88 (Offshore Bar): Average = -0.2 cy/ft (Range = -92.6 cy/ft–80.8 cy/ft) Above -20.0 ftNAVD88 (Closure): Average = -0.1 cy/ft (Range = -69.3 cy/ft–89.3 cy/ft) Above -30 ftNAVD88 (Offshore): Average = -3.1 cy/ft (Range = -68.3 cy/ft–97.0 cy/ft) Minor Loss Above -14 ftNAVD88 Along Masonboro Island Survey Reach Summary of Findings Masonboro Island –Volume Changes (cy/ft) Masonboro Island –North Sub-Reach Experienced Minor Volume Loss Masonboro Island–Central Sub-Reach Experienced Minor Volume Loss Masonboro Island–South Inlet Sub-Reach Experienced Minor Volume Gain Near Inlet But Volume Loss In Remainder Of The Sub-Reach -50 -40 -30 -20 -10 0 10 20 30 40 Volume Change Above -14 ftNAVD88 = -0.2 cy/ft 50 60 70 80 90 MasonboroIsland -South Masonboro Island -CentralMasonboro Island -North 100 400+00375+00350+00325+00300+00275+00250+00225+00200+00175+00150+00125+00100+0075+0050+0025+000+00 Station Volume Change Above MHWVolume Change Above -4 ftVolume Change Above -14 ft Volume Change Above -20 ftVolume Change Above -30 ft Summary of Findings Freeman Park (Carolina Beach Inlet) –Shoreline & Volume Change Due To The Alignment Of The Transects Across Carolina Beach Inlet, Not All Profiles Include A Dune, Berm, and Aerial Beachface; Therefore, Shoreline Change Change Calculations Were Not Performed Dredging Of The Engineered Borrow Site For 2016 CSDR Project (Ex: Transect 2) Slight Northward Movement of Channel Centerline At The Inlet Mouth (Ex: Transect 3) Summary of Findings Freeman Park (Carolina Beach Inlet) –Shoreline & Volume Change Freeman Park Transect 2 Dredging ofEngineered Borrow 20 Site For 2016 CSDR Project 10 Freeman 0 Park (South) -10 Masonboro Island -20 (North) -30 Freeman Park Transect 3 20 -40 -50 10 -20002004006008001,0001,2001,4001,6001,8002,0002,2002,4002,600 Distance From Baseline (ft) 20152016 Freeman 0 Park (South) -10 -20 Slight Northward Movement of Channel Centerline -30 -20002004006008001,0001,2001,4001,6001,8002,0002,2002,400 Distance From Baseline (ft) 20152016 Summary of Findings Freeman Park –Shoreline Elevation Changes (ft) Recreational Berm (+5.0 ftNAVD88): Average = -5.5 ft (Range = -29.9 ft–14.6 ft Mean High Water (+1.4 ftNAVD88): Average = -26.4 ft (Range = -55.8 ft–30.3 ft -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 Freeman Park 50 50+0045+0040+0035+0030+0025+0020+0015+0010+005+000+00 Station Shoreline Change at MHW (+1.4 ft NAVD88)Shoreline Change at Berm Height (+5 ft NAVD88) Summary of Findings Freeman Park –Volume Changes (cy/ft) Above +1.4 ftNAVD88 (MHW): Average = -4.7 cy/ft (Range = -15.1 cy/ft–2.9 cy/ft) Above -4.0 ftNAVD88 (Wading Depth): Average = -11.6 cy/ft (Range = -18.3 cy/ft–-0.9 cy/ft) Above -14.0 ftNAVD88 (Offshore Bar): Average = -13.8 cy/ft (Range = -32.8 cy/ft–39.7cy/ft) Above -20.0 ftNAVD88 (Closure): Average = -6.9 cy/ft (Range = -37.0 cy/ft–28.0 cy/ft) Above -30 ftNAVD88 (Offshore): Average = +3.5 cy/ft (Range = -34.6 cy/ft–36.7cy/ft) Overall Volume Loss Along The Freeman Park Survey Reach Summary of Findings Freeman Park –Volume Changes (cy/ft) Adjacent to Carolina Beach Inlet –Increased Longshore Transport Generally Occurs Near Inlets, Contributing To Erosion Of The Adjacent Shoreline Adjacent to Rock Revetment –Wave Energy Reflected In The Longshore Direction, Contributing to Erosion Of The Shoreline Adjacent To The Structure Volume Change Above -14 ftNAVD88 = -13.8 cy/ft -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 Freeman Park 50 50+0045+0040+0035+0030+0025+0020+0015+0010+005+000+00 Station Volume Change Above MHWVolume Change Above -4 ftVolume Change Above -14 ft Volume Change Above -20 ftVolume Change Above -30 ft Summary of Findings Carolina Beach –Shoreline Elevation Changes (ft) Recreational Berm (+5.0 ftNAVD88): Average = +71.4 ft (Range = 12.6 ft–188.2 Mean High Water (+1.4 ftNAVD88): Average = +47.2 ft (Range = -21.7 ft–195.7 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 CarolinaBeach -SouthCarolinaBeach Carolina Beach -Central 210 North 220 230+00220+00210+00200+00190+00180+00170+00160+00150+00140+00130+00120+00110+00100+0090+0080+0070+00 Station Shoreline Change at MHW (+1.4 ft NAVD88)Shoreline Change at Berm Height (+5 ft NAVD88) Summary of Findings Carolina Beach –Volume Changes (cy/ft) Above +1.4 ftNAVD88 (MHW): Average = +12.9 cy/ft (Range = 0.8 cy/ft–37.6 cy/ft) Above -4.0 ftNAVD88 (Wading Depth): Average = +26.4 cy/ft (Range = -2.8 cy/ft–80.3 cy/ft) Above -14.0 ftNAVD88 (Offshore Bar): Average = +43.4 cy/ft (Range = -7.5 cy/ft–141.9 cy/ft) Above -20.0 ftNAVD88 (Closure): Average = +44.3 cy/ft (Range = -7.7 cy/ft–148.8 cy/ft) Above -30 ftNAVD88 (Offshore): Average = +51.3 cy/ft (Range = 1.9 cy/ft–161.8 cy/ft) Overall Volume Gain Along The Carolina Beach Survey Reach (CSDR Project) Summary of Findings Carolina Beach –Volume Changes (cy/ft) Carolina Beach –North & Central Sub-Reaches Experienced Significant Volume Gains Due to CSDR Project (Approximately 1,004,487 cy Placed) Carolina Beach –South Sub-Reach Experienced Minor Volume Gains, Likely Due to Longshore Transport of CSDR Project Material Volume Change Above -14 ftNAVD88 = 43.4 cy/ft -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 Carolina Beach -SouthCarolina Beach -Central CarolinaBeach - 170 North 180 230+00220+00210+00200+00190+00180+00170+00160+00150+00140+00130+00120+00110+00100+0090+0080+0070+0060+00 Station Volume Change Above MHWVolume Change Above -4 ftVolume Change Above -14 ft Volume Change Above -20 ftVolume Change Above -30 ft Summary of Findings Kure Beach –Shoreline Elevation Changes (ft) Recreational Berm (+5.0 ftNAVD88): Average = +50.0 ft (Range = 1.4 ft–161.7 Mean High Water (+1.4 ftNAVD88): Average = +40.1 ft (Range = -6.2 ft–139.4 ft -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Kure Beach -SouthKure Beach -CentralKure Beach -North 190 200 380+00370+00360+00350+00340+00330+00320+00310+00300+00290+00280+00270+00260+00250+00 Station Shoreline Change at MHW (+1.4 ft NAVD88)Shoreline Change at Berm Height (+5 ft NAVD88) Summary of Findings Kure Beach –Volume Changes (cy/ft) Above +1.4 ftNAVD88 (MHW): Average = +10.7 cy/ft (Range = 0.2 cy/ft–39.6 cy/ft) Above -4.0 ftNAVD88 (Wading Depth): Average = +23.0 cy/ft (Range = 1.4 cy/ft–73.2 cy/ft) Above -14.0 ftNAVD88 (Offshore Bar): Average = +30.6 cy/ft (Range = -5.5 cy/ft–93.1 cy/ft) Above -20.0 ftNAVD88 (Closure): Average = +29.8 cy/ft (Range = -6.4 cy/ft–88.7 cy/ft) Above -30 ftNAVD88 (Offshore): Average = +35.3 cy/ft (Range = -0.2 cy/ft–97.8 cy/ft) Overall Volume Gain Along The Kure Beach Survey Reach (CSDR Project) Summary of Findings Kure Beach –Volume Changes (cy/ft) Kure Beach –North & South Sub-Reaches Experienced Significant Volume Gains Due to CSDR Project (Approximately 540,744 cy Placed) Kure Beach –Central Sub-Reach Experienced Moderate Volume Gains, Likely Due to Longshore Transport Of CSDR Project Material Volume Change Above -14 ftNAVD88 = 30.6 cy/ft(468,733 cy) -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 Kure Beach- KureBeach- Kure Beach- South Central North 120 380+00370+00360+00350+00340+00330+00320+00310+00300+00290+00280+00270+00260+00250+00240+00 Station Volume Change Above MHWVolume Change Above -4 ftVolume Change Above -14 ft Volume Change Above -20 ftVolume Change Above -30 ft Summary of Findings Fort Fisher –Shoreline Elevation Changes (ft) Recreational Berm (+5.0 ftNAVD88): Average = +6.3 ft (Range = -19.8 ft–41.7 ft Mean High Water (+1.4 ftNAVD88): Average = -1.1 ft (Range = -24.9 ft–27.1 ft) -50 -40 -30 -20 -10 0 10 20 30 40 Fort Fisher FortFisher -Central Fort Fisher -South North 50 560+00550+00540+00530+00520+00510+00500+00490+00480+00470+00460+00450+00440+00430+00420+00410+00400+00 Station Shoreline Change at MHW (+1.4 ft NAVD88)Shoreline Change at Berm Height (+5 ft NAVD88) Summary of Findings Fort Fisher –Volume Changes (cy/ft) Above +1.4 ftNAVD88 (MHW): Average = +4.4 cy/ft (Range = -1.7 cy/ft–11.4 cy/ft) Above -4.0 ftNAVD88 (Wading Depth): Average = +6.2 cy/ft (Range = -1.3 cy/ft–16.6 cy/ft) Above -14.0 ftNAVD88 (Offshore Bar): Average = +4.8 cy/ft (Range = -7.5 cy/ft–21.6 cy/ft) Above -20.0 ftNAVD88 (Closure): Average = +8.2 cy/ft (Range = -11.1 cy/ft–23.5 cy/ft) Above -30 ftNAVD88 (Offshore): Average = +20.1 cy/ft (Range = -12.5 cy/ft–67.9 cy/ft) Overall Volume Gain Along The Fort Fisher Survey Reach Summary of Findings Fort Fisher –Volume Changes (cy/ft) Fort Fisher –North Sub-Reach Experienced Minor Volume Loss; Rock Revetment Reflects Wave Energy Which Contributes To Erosion Fort Fisher –Central & South Sub-Reaches Experienced Moderate Volume Gains, Likely Due To Longshore Transport of Material From The North -20 -10 0 10 20 30 40 50 Volume Change Above -14 ftNAVD88 = 4.8 cy/ 60 70 FortFisher - Fort Fisher -Central Fort Fisher -South North 80 560+00550+00540+00530+00520+00510+00500+00490+00480+00470+00460+00450+00440+00430+00420+00410+00400+00390+00 Station Volume Change Above MHWVolume Change Above -4 ftVolume Change Above -14 ft Volume Change Above -20 ftVolume Change Above -30 ft Summary of Findings Pleasure Island –Shoreline Elevation Changes (ft) Recreational Berm (+5.0 ftNAVD88) = 38.3 Mean High Water (+1.4 ftNAVD88) = 23.4 -80 -60 -40 -20 0 20 40 60 80 100 120 140 160 180 Carolina Kure Fort Freeman Kure Beach-Carolina Beach- Kure Beach- CarolinaBeach-Beach- Beach- Fort Fisher- Fisher- FortFisher-Central Central SouthNorth SouthNorth SouthCentral North 200 550+00500+00450+00400+00350+00300+00250+00200+00150+00100+0050+00 Station Shoreline Change at MHW (+1.4 ft NAVD88)Shoreline Change at Berm Height (+5 ft NAVD88) Summary of Findings Pleasure Island –Volume Changes (cy/ft) Volume Change Above -14 ftNAVD88 = 22.6 cy/ft(1,259,291 cy) -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Fort Kure Carolina Fort Fisher-Central Carolina Beach- Freeman Fort Fisher-Carolina Beach- Kure Beach- FisherKure Beach- Beach- Beach- 190 South SouthCentral South NorthNorth Central North 200 550+00500+00450+00400+00350+00300+00250+00200+00150+00100+0050+00 Station Volume Change Above MHWVolume Change Above -4 ftVolume Change Above -14 ft Volume Change Above -20 ftVolume Change Above -30 ft Summary of Findings New Hanover County –Cumulative Volume Change (cy) Cumulative Volume Change by Elevation (2015 -2016) 800,000 Change Above +1.4 750,000 Change Above -5 700,000 ChangeAbove -14 650,000 Change Above -20 600,000 Change Above -30 550,000 500,000 450,000 400,000 350,000 300,000 250,000 200,000 150,000 100,000 50,000 0 -50,000 -100,000 -150,000 -200,000 South -250,000 Overall Summary Analyses Results -Volume Change (cy/ft) MIRP: Significant Volume Gains Due To MIRP & Figure Eight Projects Wrightsville Beach: Moderate Volume Losses MasonboroIsland: Minor Volume Losses Freeman Park: Moderate Volume Losses Due To Inlet Effects, Rock Revetment Carolina Beach: Significant Volume Gains Due To CSDR Project Kure Beach: Significant Volume Gains Due To CSDR Project Fort Fisher: Minor Volume Gains Due To Longshore Transport From North avg avg avg cumulative avg cumulative avg cumulative avg cumulative avg volume shoreline shoreline volume volume volume volume volume volume volume volume 2015 vs. 2016 Reach change Transectschange @ change @ change change change change change change change change Lengthabove (Total Change) +5 ft +1.4 ft above +1.4 above -4 ft above -4 ft above -14 above -14 ft above -20 above -20 ft above -30 +1.4 ft NAVD88NAVD88ft NAVD88NAVD88NAVD88ft NAVD88NAVD88ft NAVD88NAVD88ft NAVD88 NAVD88 ftcy/ftcycy/ftcycy/ftcycy/ftcycy/ft Reach#ftft Mason Inlet 1-1411,50092.275.116.0184,55333.8388,81354.3624,60654.3624,33962.7 Relocation Project Wrightsville Beach1-2421,703-10.8-10.7-1.2-26,326-0.9-18,866-10.4-224,696-10.5-227,173-13.7 Masonboro Island1-2239,2930.41.80.727,4350.26,883-0.2-8,613-0.1-3,039-3.1 Freeman Park5-105,510-5.5-26.4-4.7-26,130-11.6-64,069-13.8-76,126-6.9-37,7893.5 Carolina Beach1-2318,08971.447.212.9233,42726.4476,93443.4785,92244.3801,77351.3 Kure Beach1-2115,34250.040.110.7163,54023.0353,15630.6468,73329.8457,46135.3 Fort Fisher1-1916,7996.3-1.14.474,4196.2103,5714.880,7628.2137,45420.1 Pleasure Island (Freeman Park-Fort N/A55,74038.323.48.0445,25615.6869,59222.61,259,29124.41,358,899 Fisher) Overall Summary Future Datasets Will Improve Analyses Learn More About Assessing Sand Placement Locations And Volumes Assessing Background Erosion Rates With Respect To Maintenance Volumes And Cycles Establishment Of Long-Term Trends Determine Inlet Influences Help With Hotspot Determination Q&A/Discussion Agenda 9 November 2016, 4:00PM New Hanover County (NHC), Government Center Finance Conference Room #500 4:00 Call to Order Welcome/Introductions Request approval of the October meeting minutes (emailed 14 October 2016). The NC Beach Inlet & Waterway Association’s (NCBIWA) Fall Conference Agenda is set. http://www.ncbiwa.org/files/Fall%20NCBIWA%202016%20Agenda%20working%20copy.pdf Abbreviated Current Efforts: NHC’s Wrightsville Beach (WB) Coastal Storm Damage Reduction (CSDR) Project Notice to Proceed issued for FY18 plans and specs. Mason Inlet Relocation Project (MIRP) 2016/2017 inlet crossing bid tab being developed. Carolina Beach Inlet Permit Modification Inshore Dredge Material Management Site (IDMMS) pre-submittal meeting held on 3 Nov. Carolina Beach Inlet The most recent Merritt maintenance event concluded 25 October. The next event is scheduled in January; the available plant is the hopper dredge Currituck. 2016 Shoreline Mapping Program Overview, Presentation by Moffatt & Nichol Adjourn