Cape Wind to Barnstable

The Cape Wind to Barnstable project is an 18-mile, 115kv undersea and underground transmission line from the offshore Cape Wind farm to the Barnstable switching station. From a centrally located electrical service platform within the wind park, the energy from each of the wind turbine generators will be transformed to 115-kV. Two 115-kV AC submarine transmission circuits will bring the electric energy to the mainland, a distance of about 12.5 miles. Those submarine transmission lines will make landfall at the proposed location at the end of New Hampshire Avenue in the town of Yarmouth, Mass. From this landfall, an upland 115-kV transmission line will be installed in an underground conduit system within existing roadways for about 4 miles until it intersects the existing NSTAR Electric transmission line right-of-way at Willow Street in Yarmouth. From that point, the upland transmission line will go west and then south in an underground conduit system about 1.9 miles to the Barnstable switching station.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
Cape Wind Associates LLC 18 115 MA MA 2016
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
57.6 Suspended Cape Wind Barnstable Switching Station
Interstate Build Start NERC ISO/RTO Country Project Partners
2014 NPCC ISONE US