The Project

The Hudson Transmission project is a 660 MW electric transmission link between New York City and PJM Interconnection. While its main purpose is to provide a new source of electric power for the New York City customers of the New York Power Authority (“NYPA”), implementation of the Project also includes very significant upgrades and reinforcements to the transmission system in New Jersey. Construction of the project began in May 2011 and was completed in June 2013.

The Hudson cable is entirely underground and underwater, using high voltage direct current (“HVDC”) technology. The route begins in Ridgefield, New Jersey, the site of the new Hudson converter station, where it interconnects with the PJM system at a PSE&G substation. The line follows existing railroad rights-of-way, through an inactive railroad tunnel to the edge of the Hudson River in Edgewater. It is then buried beneath the Hudson for approximately three-and-a-half miles to a landfall point near Pier 92 in Manhattan. The final stretch of cable is routed beneath the West Side Highway and ultimately into the ConEdison W. 49th Street Substation.

The Project is developed by Hudson Transmission Partners, LLC (“HTP”), whose principals are responsible for the successful development, construction, and operation of the Neptune Regional Transmission System (“Neptune RTS”), a 65-mile undersea transmission link between PJM and Long Island. PowerBridge, LLC of Fairfield, Connecticut is the parent company for Hudson, Neptune, and West Point Transmission, another major infrastructure projects now in development.


Neptune Project Map

The Neptune RTS cable runs approximately 65 miles between Sayreville, New Jersey and New Cassel (North Hempstead) on Long Island, and serves the Long Island Power Authority (“LIPA”) with enough power for 600,000 homes.

Neptune was completed in June 2007, on budget and ahead of schedule, by a consortium of Siemens Power Transmission & Distribution and Prysmian Cables and Systems under contract to Neptune RTS. Since commencing operation, the system has exceeded expectations in terms of availability and the amount of power brought onto Long Island. The project includes two converter stations, an undersea cable that extends approximately 50 miles underneath the Raritan River and the Atlantic Ocean, and a land-based underground cable that extends up the shoulder of the Wantagh Parkway on Long Island. Technology, equipment, and installation methodologies used for Neptune are similar to those used for the Hudson Transmission Project.

For detailed information about the Neptune Project, go to

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