1. A World of Solutions North Topsail Beach Shoreline Protection Project Phase 1 – New River Inlet Channel Realignment & Beach Restoration NC Water Resources Congress October 31, 2013 Robert Neal Coastal Planning & Engineering, Inc. A CB&I Company

2. 1 A World of Solutions Topics 1.Location 2.Purpose 3.Problem Identification 4.Design 5.Construction 6.Preliminary Monitoring Results

3. 2 A World of Solutions Location

4. 3 Purpose Realign New River Inlet and Place Beach Material Along the Shoreline to Provide Storm Protection and Erosion Mitigation to North End of North Topsail Beach – Re-focusing the inlet will cause the creation of the ebb shoal offshore of North Topsail Beach – Ebb shoal creation will provide a buffer to absorb storm and wave energy – Ebb shoal creation in conjunction with sand placement will reduce erosion stress along northern tip of the island by closing marginal flood tide channel – Sand placement will increase beach width and mitigate erosion stress along with providing storm protection for project shoreline beyond the influence of New River Inlet

5. 4 A World of Solutions Problem Identification North Topsail Beach has been susceptible to damage created by coastal storms and long term erosion trends.  Damage from Hurricane’s Bertha and Fran (1996) estimated at $72 million from several hundred homes, including mobile homes, being destroyed.  Areas fronted by a ‘wide beach and more significant dune system’ received minor damages compared to the majority of North Topsail Beach.  Long-term erosion influenced by the alignment of New River Inlet has also left the shoreline vulnerable to damages.

6. 5 A World of Solutions Problem Identification – Storm Damage Northern Area of North Topsail Beach, Post Hurricane Fran – Sept. 1996. (Photo courtesy of Dr. Bill Cleary, UNCW)

7. 6 A World of Solutions Problem Identification – Storm Damage 24 th Ave 23 rd Ave Southern Area of North Topsail Beach, Post Hurricane Fran – Sept. 1996. (Photo courtesy of the USACE)

8. 7 A World of Solutions Problem Identification – Long Term Erosion North Topsail Beach Shoreline Change (1963 to 1983 & 1983 to 2002) Rates are based on USACE developed rates from 1963 to 1983 and 1963 to 2002.

9. 8 A World of Solutions Design Process – Influence of New River Inlet New River Inlet 1988 (Photo courtesy of Dr. Bill Cleary, UNCW)

10. 9 A World of Solutions Design Process – Influence of New River Inlet New River Inlet 2005 Alignment (Photo courtesy of the USACE )

11. 10 A World of Solutions Design Process – Influence of New River Inlet Existing Ebb Tide Delta Reconfigured Ebb Tide Delta

12. 11 A World of Solutions Construction Process North Topsail Beach – Immediately Prior to Construction (Nov. 2012)

13. 12 A World of Solutions Construction Process Alterations to the Design were Required due to Limited Material Available from New River Inlet & Storm Impacts from Hurricane Sandy and other Coastal Systems  Realignment of New River Inlet ocean bar channel (Removal of approx. 600,000 cyds)  A 4 foot high dune with a crest width of 15 feet created along northern most 1,700 feet of North Topsail Beach.  Average fill density totaled approximately 73 cy/lf.  Minor modifications made to the dune in southern project area.  Project length shortened by 2,000 feet to maximize sand placement in front of ocean front structures.

14. 13 A World of Solutions Construction Process - Accomplishments North Topsail Beach – Post Construction (March 20, 2013)

15. 14 A World of Solutions Construction Process - Accomplishments Pre-Construction November 17, 2012 Post Construction January 30, 2013

16. 15 A World of Solutions Construction Process - Accomplishments Pre-Construction November 23, 2012 Post Construction January 30, 2013

17. 16 A World of Solutions Preliminary Monitoring Results The Town of North Topsail Beach Established a Monitoring Program to Document Shoreline Performance and the Evolution of the Ebb Shoal  Shoreline measurements show a more material 6 months after construction compared to immediately following construction (results skewed due to USACE maintenance of AIWW).  Beginning stages of ebb shoal evolution appear promising (5 to 15 year time period estimated for full development).

18. 17 A World of Solutions Discussion Robert Neal Coastal Planning & Engineering, Inc. A CB&I Company Robert.Neal@cbi.com (910) 791-9494