Mystic-East Eagle-Chelsea Reliability Project

The Mystic-East Eagle-Chelsea Reliability Project involves two new underground 115-kV transmission lines and a new substation in East Boston. The project’s primary purpose is to provide additional capacity to ensure reliability in the region. Eversource expects to complete the line fall 2019 at a cost of approximately $116m.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
Eversource Energy 4.7 115 MA MA 2020
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
56.7 Underground Under Construction Mystic No. 250 Chelsea No. 488
Interstate Build Start NERC ISO/RTO Country Project Partners
No 2018 NPCC ISONE US