Regional Sediment Management In the New York District

1. Regional Sediment Management In the New York District

2. NY RSM BEFORE DEMO PROGRAM

3. NY RSM AREAS Inlet Maintenance Dredging with Bypassing Borrow Area Sharing Reuse of Rock Within-Project Sand Moving

4. Inlet Placement Authority Shinnecock immediately downdrift* Nav. GDM Moriches west of ebb shoal attachment Nav. GDM Fire Island shore protection downdrift beach O&M / CG Jones Inlet immediately downdrift* 933 East Rockaway multiple locations** O&M Rockaway bay shoreline (protect infrastructure) O&M Fire Island emergency stockpiling BCP Fire Island backpassing operations NYS Moriches stockpiling for emergency action BCP Lake Montauk Harbor immediately downdrift O&M Mattituck immediately downdrift*** O&M Intracoastal Waterway multiple locations O&M Inlet Maintenance Bypassing

5. Estimated Equivalent Annual Cost of Purchasing Material Offshore vs. Reuse TOTAL $5,050,000

6. Basis for $5.00 cy Savings • Cost of new material dredged offshore within 3 miles (cost is greater if distance is greater) CutterheadHopper $7/cy in place $9/cy in place (Based on recent bids. Assumes more than $300,000 cy total volume) • Cost of on-shore placement from channel dredging CutterheadHopper $2/cy $3/cy (Extra cost from land-based equipment and need for additional pipeline. Assumes channel dredging and placement area are within 3 miles of each other) Additional cost for new material: $5-$6/cy

7. Reuse of Rock from Jetties and Groin Rehabs • Low Cost Disposal for COE • No Material Cost for User • Possible Labor Savings for User

8. Total approximately $720,000-$760,000

9. Within-Project Sand Moving to Conserve Resource, Reduce Cost Backpassing Around Point Bypassing Around Groin Coney Island

10. Within-Project Sand Moving

11. Lawrence Harbor Borrow Area Sharing • SAVINGS • Mob/demob: $2,000,000 to NPS (twice placed sand as option to COE contracts) • Cost of Finding Sand: $600,000 for two COE projects, two stakeholders • ($150,000 per search) • Less Environmental Documentation: Sea Bright area documentation (1990’s) was $300,000. Recent new site cost was $800,000. • Easier permitting Keansburg NPS Sea Bright

12. NY RSM WITH DEMO PROGRAM

13. NYD RSM DEMO PROJECT APPROACH Add an RSM component Use RSM funds to or action to projects where they otherwise would not exist Many Small Initiatives Use small amounts of funds in many places instead of single demo

14. NYD DEMO INITIATIVES • Regional Wave Data • Document Existing NYD RSM Practices • Document the Town of Hempstead Sand Management Practices • East Inlet Island – Construct Early Successional Habitat for Nesting Birds • Long Island Sediment Needs Assessment • Fire Island National Seashore Sunken Forest Shoreline Protection – Design Alternatives • Jamaica Bay Marsh Island Restoration – Design Alternatives, Develop Stockpiling Plan

16. RESULTS

17. Lessons Learned • Reuse saves moneyfor one or more stakeholders • Most Savings: inlet dredged material bypassing • OPS is key.Maintenance is major sediment source. • Keep a Wish Listfor COE, stakeholders. Be ready with list of potential sediment users.

18. Lessons Learned (cont.) • All Districts should have some RSM seed money. Some dedicated RSM funds make more RSM initiatives possible, allows taking advantage of opportunities. • Some RSMopportunities occur during construction. • Environmental rehab construction needs follow-up : Monitoring, Post-construction corrections • Stakeholders are starting to request RSM-related actions

19. Lessons Learned (cont.) • Can’t keep long-term data-gathering programs going without direct funding • Establishing large-scale GIS needs lots of funding, time & labor