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Coastal Storm Risk Management Projects

In New York State, Coastal Storm Risk Reduction Projects are constructed through a three-way partnership. The U.S. Army Corps of Engineers is the federal partner, DEC is known as the "Non-Federal Sponsor" and the local municipality is the project's Local Sponsor. These projects are typically cost shared between the three parties (Federal, State, and local), but under certain circumstances the Federal government may undertake these projects at a 100% Federal expense. DEC works with the Army Corps of Engineers and the Local Sponsor to bring these projects from the study phase through construction to completion. As the Non-Federal Sponsor, DEC is tasked with responsibilities such as reviewing the scope of work, plans, environmental reports, coordinating with the Local Sponsor, interfacing with the public and providing the necessary real estate for project construction. These responsibilities vary by project and are laid out in agreements signed before the beginning of each phase of the project.

DEC is currently involved in two Coastal Storm Risk Reduction Projects:

  1. Long Beach Crossovers and Beachfill
  2. South Shore Staten Island Coastal Storm Risk
  3. Montauk Point Lighthouse Coastal Storm Risk
  4. Rockaway Beach Queens, NY Coastal Storm Risk

Long Beach - Crossovers and Beachfill

The Long Beach Project spanned from the City of Long Beach to Point Lookout and consisted of placing new beachfill, construction of a sand dune, new elevated timber pedestrian crossovers & vehicular crossovers, as well as the rehabilitation and new construction of stone jetties.

The Project was completed in the Spring of 2020. Operation and maintenance of the Project is now the responsibility of the City of Long Beach, Town of Hempstead, and the City of Long Beach

Map of South Shore Staten Island Coastal Storm Risk Management Project from Fort Wadsworth to Oakwood Beach
Image provided by USACE

South Shore Staten Island Coastal Storm Risk

Management Project

The South Shore of Staten Island Project has been developed to provide a level of protection from coastal flooding such as that during Superstorm Sandy for the inland communities along the South Shore of Staten Island. The Project includes the use of drainage structures, seawalls, levees, and revetments for approximately seven miles of Staten Island from the Verrazano Bridge to Oakwood Beach. The goal of this project is to reduce the risk of damages from coastal flooding and flood damage from rainfall, as well as managing risk to local residents' life and safety. The U.S. Army Corps of Engineers (Corps) is the Federal sponsor for the project, with DEC as the Corps' Non-federal Sponsor, and City of New York as the Local Sponsor.

The current estimate for the project cost is $615,000,000. The source of funding for this project is 65% Federal, 24.5% State, and 10.5% City. All three government entities have their portion of funding available to move forward with construction.

Project Elements

The project consists of three typical structures, with a length of ~5.5 miles, and a top elevation of +21.4 feet National Geodetic Vertical Datum (NGVD) of 1929.

  • Earthen Levee (~3,400 ft.) with a crest width that ranges from 10 - 15 feet. The Levee ties into high ground northwest of Hylan Boulevard.
  • Vertical Floodwall (~1,800 ft.) that is pile supported with and I-Shaped T-shaped concrete floodwall that goes around the perimeter of te Oakwood Beach Wastewater Treatment Plant.
  • Double Sheet pile Seawall (~23,700 ft.) with a 39-50 ft. wide crest. The wall will consist of two driven sheet piles with compacted sandfill in between them. The seaward slope of the seawall will consist of armor stone buried with sand and native beach vegetation. The landward side of the seawall will consist of a stone splash apron, which will have an earthen cover and native vegetation. It will tie-in to high ground near Fort Wadsworth.
    • A promenade, approximately 27 ft. in width, will be constructed atop the length of the seawall extending from Oakwood Beach through Miller Field, as shown in the drawings below.
    • A concrete boardwalk, approximately 38 ft. in width, will be constructed atop the length of the seawall extending from Miller Field to Fort Wadsworth, as shown in the drawings below

Road raising and interior drainage features will be constructed throughout the project to provide tie-ins to high ground and to allow proper drainage for stormwater. A new tidal wetland will be constructed in the Oakwood Beach area seaward of the Double sheet pile Seawall.

rendering of boardwalk plans
rendering

Status

The first construction work will be the Interior Drainage Areas in the New Dorp and South Beach Area, expected to start in late 2021/early 2022. These contracts are currently in design and include additional work and betterment requests from New York City, who will be handling the design of these Areas.

Other construction contracts are currently in the engineering design phase. The Levee and Floodwall portions of the Project have been fully designed, but due to the complicated nature of the radiologically contaminated soil in those areas, the construction of these two contracts has been delayed until financial and responsibility issues are worked out.

The change in design of the Seawall (previously conceptualized as a buried seawall) was catalyzed by the City's request for a concrete boardwalk, which was not compatible with the buried seawall. Information and data sharing on utilities, access, and finalizing the alignment between all the agencies is ongoing and will begin formal design in the coming months. Construction will be done in multiple contracts with the first contract expected to be bid out and started in 2020 with work being completed in 2023.

The coastal erosion flood protection feature at Hylan Blvd. has pivoted from a sliding roller gate a road raising of Hylan Blvd and some adjacent streets. The change was requested by New York City, who will fund the initial portion of the design efforts. The cost for these efforts is being negotiated now and formal design will commence in Summer 2021.

Montauk Point Lighthouse Coastal Storm Risk Management Project

Background

The Montauk Point Lighthouse, the first lighthouse built in New York State, is a National Historic Landmark on the Federal and State's Register of Historic Places. The Montauk Point Lighthouse, and associated dwelling, was commissioned in 1792 by George Washington and constructed in 1796 approximately 300 feet from edge of the bluff. The Landmark Lighthouse has become increasingly less stable over the years with the lighthouse now sitting less than 100 feet from the edge of the bluff, leaving it extremely vulnerable to coastal storm erosion and significant damage. The new project reconstructs the approximate 1,000 linear foot long stone revetment surrounding the bluff area and includes the removal and reuse of existing 5- and 10-ton armor stones, the placement of new 10-15 ton armor stones, and slope stabilization with terracing and vegetation above the upper crest of the new stone revetment.

Project Stakeholders
  • U.S. Army Corps of Engineers
  • State of New York (non-Federal sponsor)
    • New York State Department of Environmental Conservation
    • New York State Office of Parks, Recreation and Historic Preservation
  • Montauk Historical Society (local sponsor)
  • Town of East Hampton
Construction Timeline

Construction of the new stone revetment is officially underway as of March 2021 and will take approximately 2 years to complete (Spring 2023).

What to Expect During Construction
  • Stone Delivery & Equipment
    • New stone is being delivered to the project staging areas via truck, and will be stored onsite within both staging areas.
    • Various types of construction equipment will always be present on site
  • Public Access during Construction
    • Public parking and Lighthouse Complex will remain OPEN during construction.
    • Safe public access will continue into the Lighthouse and along both staging areas for continued public access to nearby beach areas.
    • Entire stone revetment area (shown above in green) will be CLOSED to public access during the whole 2-year construction period
    • Both staging areas and access roads (shown above in yellow) will be CLOSED to public during the whole 2-year construction period
      • South staging area and access road is closed.
      • North staging area and access road will remain open thru Summer Season 2021, but will be closed starting September 2021
  • Details on these staging and revetment areas are provided in this visual here
No Work Dates
  • Project construction work will normally continue every day, 5 days per week; if necessary, work 7 days per week is permitted
  • Please note, during the year there will be certain days with NO stone delivery and/or NO work (specific dates will be posted shortly):
    • St. Patrick's Day
    • Memorial Day Weekend
    • 4th of July Weekend
    • Labor Day Weekend
    • Columbus Day Weekend
    • Halloween
    • Thanksgiving Weekend
    • Various Lighthouse Concerts and Other Event Date

Rockaway Beach, Queens, NY Coastal Storm Risk Management Project

Background

This 100% Federally funded Army Corps Project consists of 3 distinct construction contracts:

  • Contract #1: The repair and reconstruction of 19 stone groins between Beach 9th St. and Beach 149th St. to reduce renourishment requirements and to enhance the resiliency on the Atlantic Shoreline
  • Contract #2: A reinforced dune structure (steel and rock covered in sand and native vegetation) with a total dune height of +18 ft. NAVD88 from Beach 9th St. to Beach 14th St., with dune crossing features
  • Contracts #3-5: High Frequency Flooding Risk Reduction Measures (HFFRRMs) for the Bayside of Hammels, Arverne, and Edgemere.

Status

Construction of Contract 1 began in October of 2020 with the groins at Beach 32nd and Beach 36th. Those groins were competed in March 2021. The contractor is now currently working the groins at Beach 149th and Beach 142nd, which are expected to be complete by July.

Contract 2 is in the design phase, with a target contract award date by late Fall 2021.

The HFFRRMs are still in the conceptual, planning phase and are likely to be separated into different construction contracts.

rocks and water

The Corps maintains a webpage that contains significant information, along with numerous project documents (leaves DEC website).