Title

Bergen Point Wastewater Treatment Plant Outfall Replacement Project

Document Number

N2016007

Document Type

FONSI

Project Description

The proposed project is to replace the failing 14,200-foot long outfall segment that extends from the WWTP to Jones Beach Island, passing underneath Great South Bay. The new discharge pipe will be placed in a 10-foot diameter, 14,200-foot long tunnel constructed by means of a tunnel boring machine (TBM) as this means poses the least impact to the Great South Bay. The newly constructed outfall segment under the Great South Bay would be connected just north of Ocean Parkway to the existing outfall segment that extends from Jones Beach Island south into the Atlantic Ocean. A bypass system with line stops would be installed to ensure that operation of the existing outfall would not be interrupted during the construction process. Above ground construction would include an entry shaft at the WWTP site and an exit shaft on Gilgo State Park on Jones Beach Island. The TBM entry and exit shafts would be constructed by using either ground freezing techniques or through the installation of secant piles, and would extend to a depth of approximately 80 to 100 feet below the existing ground surface. An estimated 90,000 cubic yards of muck is anticipated to be removed, including both tunnel excavation and shaft construction. The construction staging area on Jones Beach Island would be approximately 2 to 2.5 acres and the staging area at the WWTP would be approximately 2.5 to 3 acres. These areas would be restored to preconstruction conditions upon project completion. All disturbed area on the Jones Beach Island would be revegetated and restored.

EPA Region/Headquarters Office

2

State or Territory

NY

Point of Contact

Nikolaus Wirth
212-637-3902
wirth.nikolaus@epa.gov

Date of Issuance

2016-02-05 00:00:00.0

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