Mystic – Golden Hills Line is a 345kV underground line with a length of 10.13km from Mystic, Massachusetts, US, to Golden Hills, Massachusetts, US.

The project, which is currently under construction, is expected to be commissioned in 2021.


Mystic – Golden Hills Line is an underground line that will be operated by NSTAR Electric. The line will carry alternating current (AC) through single circuit cable.

The development of the Mystic – Golden Hills Line project has been approved by the Massachusetts Energy Facilities Siting Board.

Mystic – Golden Hills Line project development status

The construction works on the Mystic – Golden Hills Line project were commenced in 2020 and commissioning is expected in 2021.

About NSTAR Electric

NSTAR Electric Company (NSTAR Electric), doing business as Eversource Energy , is engaged in the transmission and distribution of electricity to commercial, residential and industrial customers. The company offers electric distribution which includes the generation activities of PSNH and WMECO; electric transmission includes CL&P, NSTAR Electric, PSNH and WMECO that owns and maintains transmission facilities, which are part of an interstate power transmission grid over which electricity is transmitted throughout New England.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.