The Hudson Transmission Project is a 660 MW electric transmission link between New York City and the PJM Interconnection. While its main purpose is to provide a new source of electric power for 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.
The Hudson transmission line is entirely underground and underwater, using back-to-back high-voltage direct current (HVDC) technology and an AC tie across the Hudson River. The route begins in Ridgefield, New Jersey, the site of a new 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 miles to a landfall point near Pier 92 in Manhattan. The final half-mile of cable is routed beneath the West Side Highway and ultimately into the ConEd W. 49th Street Substation.
The Project began construction in May 2011 and was completed in June 2013.