ATLANTIC COAST OF LONG ISLAND, JONES INLET TO EAST ROCKAWAY INLET, LONG BEACH ISLAND, NY Contract #2 Construction Scope April 18th-19th 2018 New York District
PLAN COMPONENTS Length of Beachfill 35,000 linear feet (LF), extends from east end of Point Lookout to west boundary of the City of Long Beach at Nevada Avenue, with an incidental taper into East Atlantic Beach Point Lookout & Lido Beach (east of Nickerson) 110 ft berm from seaward toe of dune; elevation +9 ft NAVD88 1V:20H slope to existing bathymetry Dune with crest width of 25 ft; top elevation +14 ft NAVD88 with 1V:5H landward and seaward slopes City of Long Beach & Lido Beach (west of Nickerson) 190 ft stepped berm from seaward toe of dune o 40 ft flat berm; elevation +9 ft NAVD88 o 20 ft berm at 1V:10H slope to +7 ft NAVD88 o 130 ft flat berm; elevation +7 ft NAVD88 o 1V:20H slope to existing bathymetry Dune with crest width of 25 ft; top elevation +14 ft NAVD88 with 1V:5H landward and seaward slopes (1V:3H landward slope fronting the boardwalk in Long Beach) Nassau County (Nickerson Beach) ~5,000 LF, existing berm provides equivalent coastal storm risk management Berm area undisturbed to allow for bird nesting and foraging Dune with crest width of 25 ft; top elevation +14 ft NAVD88 with 1V:5H landward and seaward slopes Incorporates existing dunes into construction of HSLRR Plan Beachfill, Dune Grass, and Sand Fence Quantities initial fill placement: approximately 4,000,000 cy renourishment: o 1,770,000 cy fill o 5-yr intervals for 50-yr period of analysis planting dune grass: 34 acres sand fence: 75,000 LF Offshore borrow area Contains ~36 million cy of beachfill located ~one mile offshore of the barrier island of Long Beach Groins Existing groins o 18 total rehabilitation o rehabilitation/100 ft extension of Point Lookout terminal groin Newly constructed groins o 4 total at eastern end of island o 250,000 tons of stone Access for Pedestrians and Vehicles (Dune Crossovers) City of Long Beach: 19 total Town of Hempstead: 24 total Nassau County: 4 total 2
ONGOING WORK New York District Groin work in Long Beach is complete Entering the groin condition monitoring phase Groins are functioning as intended Beach and staging area clean-up is starting this week Terminal groin in Point Lookout will require 4 more months of work Work has been delayed by redesign work and contracting process Project has trucked in 250,000 tons of stone (500,000,000 lbs) 3
UPCOMING WORK FOR CONTRACT 2 Around 4 million cubic yards of sand for beach and dune, hydraulically pumped onto the beach Vehicle and pedestrian dune cross-overs Dune plantings and sand fencing In Point Lookout, dune positioning requires the demolition, relocation, and reconstruction of the sun shelter Optional items that may be constructed if paid for by non-federal sources Ipe wood and matching aluminum pipe railing for the four widest boardwalk cross-overs in City of Long Beach Pile driving for future comfort stations and life guard facilities in City of Long Beach 4
SAND PLACEMENT The low bidder was Great Lakes Dredge and Dock Corporation. Bids were opened on 8 March 2018, contract was officially awarded April 16th, 2018 for $51M (100% Federal Funding) Pile driving for the walk overs will be the first increment of construction-no schedule limitations in contract Beach closures for sand placement will be in moving 1000 ft increments (for scale, the groins are approximately 800 feet apart) We don t yet know when the dredge contractor will arrive. The contractor will present a work plan shortly. We don t yet know where they intend to start sand work. This information will be in the contractor s work plan. 5
Historical Storm Water Levels with Stepped Fill Cross-Section (Long Beach & Lido Beach) Existing Boardwalk (approx. +16 ft) Design Dune (+14 ft) 2012 Hurricane Sandy (peak measured water level with wave effects) +17.5 ft 15 2012 Hurricane Sandy (still water level) +11.2 ft 1962 Northeaster +8 ft 10 5 2011 Trop. Storm Irene +7.8 ft 1992 Northeaster +7.3 ft 1985 Hurricane Gloria +5.8 ft Design Berm (+9 ft) High Tide +1.5 ft 0 Design Berm (+7 ft) Advanced Nourishment -5 Groin Existing Beach 0 100 200 300 400 500 Distance (ft) Note: Wave heights not drawn to scale. Hurricane Sandy water levels are average of USGS gage readings. 6 600
Historical Storm Water Levels Compared with Fill Cross-Section (Town of Hempstead & Nassau Co.) Design Dune (+14 ft) 2012 Hurricane Sandy (peak measured water level with wave effects) +17.5 ft 15 2012 Hurricane Sandy (still water level) +11.2 ft 1962 Northeaster +8 ft 10 5 2011 Trop. Storm Irene +7.8 ft 1992 Northeaster +7.3 ft 1985 Hurricane Gloria +5.8 ft Design Berm (+9 ft) High Tide +1.5 ft 0 Advanced Nourishment -5 Existing Beach Existing Beach 0 100 200 300 400 500 Distance (ft) Note: Wave heights not drawn to scale. Hurricane Sandy water levels are average of USGS gage readings. 7 600
PROFILE OF BEACH DESIGN IN LONG BEACH 8
BEACH PROFILE FEATURES OVER TIME Dune Storm Berm Natural Berm Berm Crest MSL
NEW YORK AND GRAND Crest of Dune Storm Berm Beach Slope 10
LINCOLN AND FRANKLIN Crest of Dune Storm Berm Beach Slope 11
WHERE WILL THE SAND COME FROM? Proposed Area Proposed Area 12
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CROSS-OVERS 30 ft wide crossovers @ New York, National, Riverside, and Neptune-10 ft wide for all others All existing access points will have equivalent access All crossovers will be ADA compliant Existing Ramps will be left in place for access until new crossover is completed 18
All cross overs will be constructed with Grade 1 Southern Pine Specifications Section 06 13 33 All framing lumber including headers, stringers, pile caps, decking & stairs shall be treated southern yellow pine. Each piece of treated lumber or timber shall be branded, by the producer, in accordance with AWPA U1AWPA M6. Treat all piles, wood in contact with the ground, and all pier cross bracing in accordance with AWPA U1 UC5A Chromated Copper Arsenate (Minimum Retention of 2.5 pcf). Treat all other timber in accordance with AWPA U1 UC4C with CCA - Chromated Copper Arsenate (Minimum Retention of 0.6 pcf). The Contractor shall be responsible for the quality of treated wood products. 19
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POINT LOOKOUT AREA 22
Wood Beams 23
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GROIN 58, WEST JETTY OF JONES INLET Original awarded design 120 foot offset Revised design maximizes water access and beach width 60 foot offset 25
For More Information, Contact: Mr. Daniel Falt Project Manager USACE New York District 917-790-8614 Daniel.T.Falt@usace.army.mil Ms. Sue McCormick, P.E. Program Manager NYSDEC 518-402-8185 susan.mccormick@dec.ny.gov 26