Poseidon Project

The Poseidon Project involves a planned HVDC transmission line transmitting 500 MW of capacity and energy from the PSEG Deans Substation 500-kV bus to Long Island’s Ruland Road Substation 138-kV bus. The 78-mile Poseidon route begins in South Brunswick, New Jersey and interconnects in Long Island at the Ruland Road substation in Melville. The project will connect Long Island to the PJM Power Market, a 13-state market – including New Jersey – with 180,000 MW of affordable, clean and reliable energy. The line will be buried over its entire length: underground in New York and New Jersey and underneath the Raritan Bay, the outer New York harbor, and the Atlantic Ocean. The project is expected to be in service in 2020. According to THUB calculations, the project has an estimated cost of $593m.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
Poseidon Transmission LLC 78 500 NJ NY 2020
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
593 Planned Deans Ruland Rd.
Interstate Build Start NERC ISO/RTO Country Project Partners
2018 NPCC NYISO US Anbaric, Exelon