Shoreline Protection Research Update 5/29/13 Agenda Rockaway - PowerPoint PPT Presentation

Rockaway Visioning and Shoreline Protection Research Update 5/29/13

Agenda Rockaway Visioning Process Community input regarding: Shoreline Protection Aesthetic and Community Concerns Economic Development and Concessions Recreation Shoreline Protection Work Underway Survey of Protection Measures Next Steps 5/29/13

Visioning Website 5/29/13

Shoreline Protection Recreation Survey Results 5/29/13

Aesthetic and Community Concerns Economic Development and Concessions Survey Results 5/29/13

Storm Surge Barriers 5/29/13

5.5 miles 10 year construction $4.6B $22M/year to operate Eastern Scheldt Storm Surge Barrier, Netherlands 5/29/13

5.5 miles Scheduled to complete in 2014 $6B 78 gates to protect 3 inlets Source: WebUrbanist Venice Storm Surge Barrier (MOSE), Flap Gate 5/29/13

520 M wide Built 1974 - 82 € 1.3B ($1.7B) The Thames Barrier , UK 5/29/13

22M high and 210M long gates Construction 1991-97 € 660M ($855M) Source:CoastLearn Maeslantkering Storm Surge Barrier , Rotterdam, Netherlands 5/29/13

Source: Wikipedia Maeslantkering Storm Surge Barrier , Rotterdam, Netherlands 5/29/13

Not funded Source: SOM Design The Bay Arc , San Francisco 5/29/13

Beach Nourishment and Groins 5/29/13

60M wide dune € 29.35M initial cost ($38M) € 115,000 for regular replenishment ($150K) Source: Nordsee.com Westerland and Sylt , Germany 5/29/13

Initial replenishment of 12M CM @ $300M 10 year replenishment @ $4M Source: Tourist Destinations.com Bondi Beach , Australia 5/29/13

Keta , Ghana 5/29/13

$85M 10M CM of sand Source: Baird.com Keta , Ghana 5/29/13

Beach Protection, North Carolina 5/29/13

Containment 5/29/13

$3.6M Completed 2013 45,000 gal cistern Source: TreePeople Tuxford Green , Sun Valley, CA 5/29/13

Holds 2.6M gal Completed this year Rotterdam Car Park , Netherlands Source: WaterWorld.com 5/29/13

Construction 1193-2006 $3B 4 miles long Source: MegaStructure.com Tokyo Water Storage Tunnels 5/29/13

Holds 2.3B gal $4B Filled 3 times in past 4 years Deep Tunnel , Chicago Source: Chicago Tribune 5/29/13

Not yet constructed Water Plaza , Netherlands Source: WaterWorld.com 5/29/13

Water Plaza , Netherlands Source: WaterWorld.com 5/29/13

Floodwalls and Levees 5/29/13

27% of the Netherlands is below sea level Typical Levee , Netherlands Source: ICS.UCI.EDU 5/29/13

“Weak Link” Coastal Study Completed by 2015 Zwakke Schakels , The Netherlands Source:zuid.holland.nl 5/29/13

1.9 km long (1.18 miles) 1 km new levee, 12 M above sea level Click to edit Master title 2.5M CM (over 88M CF) 40-70 M of beach width added style € 75M ($98M) 1100 days of construction 50-100 year protection • Click to edit Master text styles – Second level • Third level – Fourth level Fifth level » Source: mimoa.edu Scheveningen, Netherlands 5/29/13

Source: mimoa.edu Scheveningen, Netherlands 5/29/13

3 km long Dunes are 50M wide € 18.2M ($23M) Protects against 10,000 year flood Source: kustie.nl Noordwijk, Netherlands 5/29/13

Source:flyingpig.nl Noordwijk, Netherlands 5/29/13

Can be built to any height Could be built with interior seawall Source: Walter Meyer, Local Office Landscape and Urban Design Double Dune 5/29/13

Source: USACE Ocean City, Maryland, Boardwalk and Sheet Pile Wall 5/29/13

Source: USACE Virginia Beach, Virginia, Boardwalk and Sheet Pile Wall 5/29/13

Source: USACE Virginia Beach, Virginia, Boardwalk and Sheet Pile Wall 5/29/13

Virginia Beach, Virginia, Source: USACE Boardwalk and Sheet Pile Wall 5/29/13

Source: USACE Virginia Beach, Virginia, Reinforced Dune 5/29/13

Elevations

Beach 149th 5/29/13

Beach 118th 5/29/13

Beach 92nd 5/29/13

Next Steps Early June The Special Initiative on Rebuilding and Resiliency report is released. Identifies the City’s response to climate change risks and plans for long-term rebuilding in hardest hit neighborhoods. July/August Phase 1 of the USACE beach replenishment starts at B87th to B149th. 600,000 CY of sand placed on beach. Summer/Fall 2013 Continuing community engagement to develop a proposal for shoreline line protection August/September Phase 2 of USACE beach replenishment from 19 th to 149 th begins. 3,500,000 CY of sand placed on beach. June 2015 USACE North Atlantic Coast Comprehensive Study of Flood Risk Reduction will be issued. Next Steps 5/29/13