Lower SEMA Project

Long Term Lower SEMA Project is an 18-mile, 345-kV transmission line that originates at Carver and terminates at Bourne, Mass. The new transmission line runs from the Carver substation southeast along an existing NSTAR right of way, cross the Cape Cod Canal and tie into an existing line (Line #120) in the vicinity of the Bourne switching station. The project, which is sponsored by NSTAR Electric Co., cost $114 million. The project was proposed as a reliability upgrade to meet federal standards. It will provide increased transfer capability into the Cape Cod area. The Cape Cod Commission on Jan. 19, 2012, approved the project. As of Jan. 27, it was still awaiting approval from the Massachusetts Energy Facilities Siting Board. Approval was received from the siting board in July 2012. Construction began in September 2012 and was complete June 2013.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
Eversource Energy 18 345 MA MA 2013
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
114 Operating Carver Bourne
Interstate Build Start NERC ISO/RTO Country Project Partners
2012 NPCC ISONE US NSTAR and National Grid