National Grid

Transmission Electricity Transmission: National Grid owns and operates an electricity transmission system of approximately 8,600 miles spanning upstate New York, Massachusetts, Rhode Island, New Hampshire and Vermont to customers that include local electric companies, municipalities and large commercial enterprises. Our US electricity transmission facilities operate at voltages ranging from 69 kV to 345 kV, utilizing overhead lines, nearly 90 miles of underground cable and 524 substations. We are the largest electricity transmission service provider in New England and New York by reference to the length of these high voltage transmission lines.

Canadian interconnector: National Grid owns and operates a direct current transmission line rated at 450 kV that is a key section of an interconnector between New England and Canada.

Northeast Operations
This section contains helpful information for new and existing transmission customers and general information about our Northeast operations, the heart of our U.S. transmission activities.

Auburn Transmission Project
Located in Cayuga and Ondondaga Counties, New York

New York Energy Solution
Located in the Capital District, Mohawk Valley, and Hudson Valley, New York

Spier Falls to Rotterdam 115kV Transmission Line Project
Located in Saratoga and Schenectady Counties, New York

Sodeman Road Substation Project
Located in Saratoga County, New York

Lasher Road Substation Project
Located in Saratoga County, New York

Mohican-Battenkill 115kV Rebuild Project
Located in Washington and Saratoga Counties, New York

Aquidneck Island Reliability Project - "OnIsland"
Located on Aquidneck Island, Rhode Island

Golden Rock Transmission & Substation Project
Located in Salem, NH & Methuen, MA