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News » US » Contract awarded for $187m Long Island outfall » published 6 Mar 2018

Contract awarded for $187m Long Island outfall

A US$187m construction contract has been awarded for the replacement of a 2.7-mile tunneled wastewater outfall on Long Island, New York.

Replacement of the pipe at Bergen Point Waste Water Treatment Plant in Babylon will be carried out by a joint venture of OHL USA (40%), Posillico (40%) and Seli (20%).

The project for Suffolk County Department of Public Works includes the construction of a tunnel 2.7 miles long and with an internal diameter of 10 feet. The tunnel will be constructed to replace the existing prestressed concrete cylinder pipe outfall, which carries millions of gallons of treated wastewater, connecting the Bergen Point Wastewater Treatment Plant to the Barrier Island under the Great South Bay.

The new tunnel, which will be excavated and concurrently lined using precast concrete segment rings, will address the concerns of potential failure of the current pipe.

The JV has selected a slurry TBM as the most effective and efficient means of tunnel excavation and elected to use 4-foot-wide precast segment liners. The team will also complete ancillary work within the tunnel, including the installation of new piping and valves and associated plumbing as well as heating, ventilation, air conditioning and electrical work.

 

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This article was published on 6 Mar 2018 (last updated on 6 Mar 2018).

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