Merrimack Valley Reliability Project

The Merrimack Valley Reliability Project is a planned 345-kV, 24.5-mile transmission line continuation of the proposed 3124 Line in New Hampshire and terminating at the Scobie Pond substation. In New Hampshire, approximately 18 miles will pass through Londonderry, Hudson, Windham and Pelham, NH. Eversource will construct 10 miles through Londonderry and Hudson, and National Grid will construct 8 miles through Hudson, Windham, and Pelham.In Massachusetts, approximately 6.5 miles will pass through Dracut, Andover and Tewksbury. National Grid will construct this entire portion.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
National Grid USA 24.5 345 MA NH 2017
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
123 Operating 3124 Line Scobie Pond
Interstate Build Start NERC ISO/RTO Country Project Partners
No NPCC ISONE US Eversource Energy