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Long Island Replacement Cable

CL&P replaced seven fluid-filled transmission cables between Norwalk, Connecticut, and Northport, New York, with three new solid-core (non-fluid filled) cables. The replacement cables will significantly improve reliability of service to both states and reduce environmental impacts resulting from damage of the existing cables. Read the Long Island Replacement Cable project overview.

Length:11 miles
Operating voltage:138,000 volts
Cable specifications:Solid dielectric (i.e., plastic insulation), copper conductor. The replacement will consist of three cables.
Installation:Buried approximately six feet into the seabed.
Cost:NU's share of the project cost is $79 million.
Regulatory review by:Connecticut: The Connecticut Siting Council, Connecticut Department of Public Utility Control, Connecticut Department of Environmental Protection
New York: New York Public Service Commission and Department of Environmental Conservation
Federal: U.S. Army Corps of Engineers
Timetable:
  • Construction began: Fall 2007
  • In-service date: July 29, 2008
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