BEACH AND INLET PROJECTS UPDATE

BEACH AND INLET PROJECTS UPDATE

USACE DELTA PROJECT

USACE Delta Project Project Extents

Elevation Elevation (ft NAVD88) (ft NAVD88) USACE Delta Project Project Cross-Section 20 18 20 16 18 14 16 12 14 10 12 108 68 46 24 02-2 0-4 -2-6 -4-8 -6-10 -8 75 ft 120 ft Post-Matthew Post-Matthew Profile Profile 85 ft 110 ft Pre- Project Pre- Project MHW MHW Station 220+00 Station 220+00 Post- Project Post- Project MHW MHW Beach Fill Beach Template Fill Berm Template Only Mean High Water Mean High Water Ocean Ocean -12-10 -14 Sta-12 220+00 38.4 Berm cy/ft -16-14 ~40-55 cy/ft -18 Sta-16 220+00-20 -18-50 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800-20 Distance to Baseline (ft)

USACE Delta Project Project Extents

USACE Delta Project Original Project Plan USACE plan showed a ~120-130 ft berm from Town line to SE 63 rd street Base project is from Town line to SE 77 th (4,000 ) = 163,345 CY shown on plans Delta project is from SE 77 th to SE 58 th (6,000 ) = 251,526 CY Both have ~ 40-55 cy/ft placement rate Unit rate for Delta work = $11.93/cy Town has allotted up to $3 million for this project Project was completed in summer Received pre- and post-project surveys in December

USACE Delta Project Project Results USACE showed a ~120-130 ft berm from Town line to SE 63 rd street project was actually constructed to SE 58 th street as originally planned and with a 150 ft berm Base project is from Town line to SE 77 th (4,000 ) = 163,345 CY shown on plans 246,245 CY placed Delta project is from SE 77 th to SE 58 th (6,000 ) = 251,526 CY shown on plans 394,010 CY placed Unit rate for Delta work = $11.93/cy - $7.61/CY actual Total volume placed from Town line to SE 58 th street = 640,255 cy

USACE Delta Project Project Results

LOCKWOODS FOLLY PROJECTS - SDI-5 PERMIT - AIWW CROSSING - NEARSHORE PLACEMENT

Lockwoods Folly Projects

Hotspot Location

Hot Spot Shoreline Change and Dune Escarpment Feb 2018 Jun 2018 MHW Structure Mar 2015 (BD) Mar 2015 (AD) Feb 2018 Jun 2018

Lockwoods Folly Inlet Projects - SDI-5 Permit O Brien and Gere Have Been Working to Get This Permit for the Town Allows Town to complete projects like the USACE to currently permitted widths and depths for just the inlet itself Timeline for approval is now late January

Lockwoods Folly Inlet Projects - AIWW Crossing Project USACE Released a Plan Set In Early Fall That Showed Placing 88,000 CY of Material on West End Of Oak Island Placement on Oak Island due to lower number of easements required Moved western edge of placement area further east Contract has been awarded and USACE is awaiting final schedule before determining if Town can pay for additional material to be dredged out of bend widener and placed (bid showed $7.50/cy) Town of Holden Beach has requested as well so meeting will take place to discuss options if schedule allows for additional material to be dredged Special meeting may need to be called for Town to approve additional monies if additional material can be dredged/placed

Lockwoods Folly Inlet Projects - AIWW Crossing Project

Lockwoods Folly Projects Nearshore Placement Town Has Asked that Next Project Be Placed Near West End Hotspot Currently Estimated ~30,000 CY - $95,000 Town Share Channel to be dredged to -10 deep and 150 wide Total cost = $676,000 = 30 days of dredging Most of funding from State Shallow Draft Fund Material will be placed in nearshore area near historical hotspot Will also complete additional survey monitoring in future to track offshore feature and hotspot behavior

Lockwoods Folly Projects Nearshore Placement

Lockwoods Folly Projects Nearshore Placement

Lockwoods Folly Project Nearshore Placement

Lockwoods Folly Projects Nearshore Placement USACE Is Current Showing Limited Availability for Special Purpose Hopper Dredges Next Year Next few projects will likely be completed with sidecaster dredge at Federal expense Town and County has reminded USACE that local funds were provided contingent on beneficial placement of the material in the nearshore

DUNE MONITORING PROJECT

Dune Monitoring Project Bi-Weekly Monitoring May 15 August 31, 2018 Color, Temperature and Grain Size Monitoring

Dune Monitoring Project- Temperature Results Measurements set up to record hourly Temperature that produces 50% of each gender is 84.6 f Gender determined in middle third of incubation Average Min Temperature - Dune Stations: 74.1 F - Control Stations: 74.1 F Average Temperature - Dune Stations: 84.0 F - Control Stations: 83.0 F Average Max Temperature - Dune Stations: 89.9 F - Control Stations: 88.0 F

Dune Monitoring Project - Color Results Color improved when contractor changed where borrowing material from in pit CONTROL STATIONS OBSERVATION STATIONS Date Caswell Beach 5 th PL West 54 th PL West 51 st PL W 42 nd PL W 23 rd PL W 13 th PL W 3 rd PL E 11 th PL E 29 th PL E 37 th PL E 46 th ST SE 55 th ST SE Weather 5/14/2018 7/1 7/1 7/1 3/4 4/3 3/4 4/3 4/3 5/1 3/4 3/6 3/6 3/6 Sunny 5/21/2018 7/1 7/1 7/2 5/1 4/1 4/1 4/2 5/1 4/1 4/3 3/4 4/3 4/2 Sunny 6/5/2018 7/1 7/1 7/1 4/1 5/2 3/3 5/2 5/1 4/1 4/4 3/4 3/3 4/4 Sunny 6/21/2018 7/1 6/2 6/1 4/2 4/1 4/2 3/2 4/2 4/2 4/3 4/4 3/4 4/3 Sunny 7/3/2018 7/1 8/1 7/1 4/1 5/1 5/2 4/2 5/1 6/1 4/4 6/1 3/3 3/4 Sunny 7/20/2018 7/1 7/1 7/1 4/1 5/1 3/4 4/3 5/2 4/1 3/3 3/6 4/4 3/4 Wet Sand 8/9/2018 7/1 5/1 7/1 5/1 5/1 4/1 4/1 4/1 5/1 4/1 4/2 4/3 4/2 Sunny 8/24/2018 7/1 7/1 6/1 4/2 4/2 4/2 4/3 4/3 4/2 4/4 4/4 4/3 5/2 Sunny 9/11/2018 7/1 7/1 7/1 7/1 5/1 5/2 4/2 4/2 5/1 3/3 4/4 3/4 5/2 Sunny

Dune Monitoring Project Grain Size Results Material met sediment grain size compatibility rules

Dune Monitoring Project Overall Results Final report was submitted to agencies October 1, 2018 with no comments received Temperatures recorded in dune stations were slightly warmer (approximately 1 degree avg) than control stations Most dune stations were installed on leeward side of dune crest which would be expected to be warmer Munsell color values were lower for non-nourished areas color improved when contractor moved Sediment grain size is compatible All nests laid in the dune restoration project area were relocated this year (11 of 51 nests laid 46 false crawls with 17 in dune restoration area)

ANNUAL MONITORING SURVEY 2017-2018 (BEFORE FLORENCE)

Annual Monitoring Survey (2017-2018) Completed just before Hurricane Florence arrived in early September Survey consists of: Beach profiles Eastern Channel Lockwoods Folly Inlet

Annual Monitoring Survey (2017-2018)

Annual Monitoring Survey (2017-2018) Beach Profile Shoreline and Volume Change Results

Annual Monitoring Survey (2017-2018) Volume Change

Annual Monitoring Survey (2017-2018) Example Profiles

Annual Monitoring Survey (2017-2018) Eastern Channel Results

Annual Monitoring Survey (2017-2018) Lockwoods Folly Inlet Results Some movement of inlet throat to east Some deepening/straightening of inlet over bar

POST-FLORENCE MONITORING SURVEY

Post-Florence Monitoring Survey Elevated Water Levels and Wave Conditions ~3 Days

Post-Florence Monitoring Survey Elevated Water Levels and Wave Conditions ~3 Days ~3 Days

Post-Florence Monitoring Survey Beach Profile Shoreline and Volume Change Results After initial meeting with FEMA, appears that Town may qualify for emergency dune restoration project Will hopefully know something this Spring

Post-Florence Monitoring Survey Volume Change

Post-Florence Monitoring Survey Example Profiles

Post-Florence Monitoring Survey Example Profiles

Post-Florence Monitoring Survey Example Profiles Berm Loss Captured Offshore

Post-Florence Monitoring Survey Eastern Channel Results Shoaled Volume (cy) Date Range Beach Compatible Non Beach Compatible Combined Reach 1 Reach 2 Reach 3 Total Reach 4 Reach 5 Total Total Sep 2018 - Oct 2018 237 454 1,230 1,921 532 1,650 2,182 4,103 Template - Oct 2018 88,883 4,318 15,692 108,894 128 217 345 109,238

Post-Florence Monitoring Survey Lockwoods Folly Inlet Results Some minor shoaling within inlet over outer bar 0-2 where shoaling occurred September 2018 October 2018

FEMA TURTLE HABITAT PROJECT

FEMA Turtle Habitat Restoration Project Initial Project Budget for Volume of 364,000 cy FEMA authorization of $ 6,026,365 (75% of Cost) State/Town expected contribution of $ 2,008,788 Total project expected cost = $ 8,035,153 Additional Town Funds (Possible) Contribute $5 7 million: 435,000 609,000 cy Total potential project volume: 750,000-1,000,000 cy May also incorporate Post-Florence project volume depending on FEMA approval and reimbursement timeline

FEMA Turtle Habitat Restoration Project Project Extent Alternatives

FEMA Turtle Habitat Restoration Project Turtle Habitat Restoration ONLY Turtle Habitat: 20 ft wide dune at 10 ft NAVD88 with 70 ft berm at 7 ft NAVD88 14,000 ft (Sta. 300+00 430+00) Template Volume Required: 470,000 cy Turtle Habitat Restoration with Additional Town Volume Alternative A: 20 ft wide dune at 15 ft NAVD88 with 50 ft berm at 7 ft NAVD88 18,000 ft (Sta. 300+00 470+00) Template Volume Required: 1,408,000 cy Alternative B: 20 ft wide dune at 12 ft NAVD88 with 50 ft berm at 7 ft NAVD88 27,000 ft (Sta. 300+00 560+00) Template Volume Required: 1,404,000 cy

FEMA Turtle Habitat Restoration Project

FEMA Turtle Habitat Restoration Project Offshore Site #1 Preliminary volume estimate in permitted central reach borrow area: 400,000 500,000 cy Distance from project: maximum 5 mi Hopper dredge project Field investigations: Jan/Feb 19 Cultural Resource Survey: Magnetometer and Side- Scan (Geodynamics and Tidewater Atlantic Research) Central Reach Vibracoring (American Vibracore Services)

FEMA Turtle Habitat Restoration Project Offshore Site #1 Example Vibracores

FEMA Turtle Habitat Restoration Project Proposed Fee and Schedule Proposed Schedule 16 Months Finalize Construction by May 2020 Field investigations next 3 months Preliminary engineering and permitting next 3-9 months Final design and bidding next 9-12 months Project construction next 12-16 months

MASTER PLAN

Overview of Master Plan Purpose and Need To Establish and Implement a Comprehensive, Long-Term, Non- Federal Beach and Inlet Management Program that will Restore and Maintain the Oceanfront Shoreline Of Oak Island. Provide Shore Protection for Residential Structures, Infrastructure, and Recreational Assets; and Preserve the Local Tourism-Based Economy. Consolidate the Shore Protection Planning and Management Activities of the Town Under a Unified, Regional Beach and Inlet Management Program.

Overview of Master Plan Verify Sediment Need for Initial Project and Over Next 50 Years (2-3 Mcy for Initial Project / 1 Mcy Every 6 Years = 10-15 Mcy Preliminary Estimate No Storms) USACE Delta and FEMA Turtle Habitat Project Can Hopefully Reduce Volume Need May Need to Build In Phases Modeling to Refine Above Estimates Currently Ongoing

Overview of Master Plan Field Investigations Geotechnical vibracoring for sediment compatibility November 2018 vibracores Eastern Channel, LFI, AIWW bend widener Jan-Mar 2019 native sampling and vibracoring upland sites Additional offshore work planned for January- March central reach Other offshore areas and Frying Pan Shoals to be completed later - BOEM

Overview of Master Plan Lockwoods Folly Inlet Management Plan Analytical Analysis Digitize inlet throat and shoreline locations Look for patterns to determine safe corridor Cultural resources are a major constraint Modeling Field velocity studies of Lockwoods Folly Inlet for models late Jan/early February Test options to verify analytical results

Overview Summary USACE Delta Project - Completed Lockwoods Folly Inlet Initatives SDI-5 Permit Complete By February 2019 AIWW Crossing with Beach Placement Complete by May 2019 Nearshore Placement Complete Last Half of 2019 Dune Monitoring Report Complete Annual and Post-Florence Surveys Annual Survey - Completed Post-Florence Survey Complete by February 2019 FEMA Request for Post-Florence Reimbursement Discussions with FEMA Complete by Spring 2019

Overview Summary FEMA Turtle Habitat Project Field Investigations - Complete by March 2019 Engineering and Permitting Submittals - Complete by May 2019 Receive Permits and Finalize Construction Documents Complete by October 2019 Bid Project November 2019 Project Construction January May 2020 Master Plan Field Investigations Ongoing Discussions with BOEM and Others Concerning Frying Pan Shoals Estimate of Engineered Beach Volume Need Complete by Spring/Summer 2019 Environmental Studies and Documentation - Ongoing

Overview Summary