Welcome to the Interstate Reliability Project

The Interstate Reliability Project is a 345-kilovolt (kV) transmission project in an existing transmission right-of-way. It is one of four New England East-West Solution (NEEWS) 345-kV transmission projects serving portions of New England. The Interstate Reliability Project is needed to meet the demand for electricity and support the reliable delivery of electricity to customers under many different conditions.

Project Information

The Project begins in Millbury, Massachusetts and continues along the existing transmission line rights-of-way (ROW) into North Smithfield, Rhode Island. It continues west to Burrillville, Rhode Island and into Connecticut where it will connect to a new line being constructed by Connecticut public utility, Northeast Utilities.

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Project Update Notice - Massachusetts for the weeks of March 23rd and March 30th

The wire work from the Millbury #3 Substation to Central Pike in Sutton has been completed. Wire pulling activity will soon be underway from Central Pike to the right-of-way intersection with Route 146. After crossing Route 146, wire pulling activity will move towards Purgatory Road. The wire pulling activity over Route 146 will take place over the weekends and is scheduled to begin on March 28th. The work has been approved by the Massachusetts Department of Transportation.

Project Update Notice - Rhode Island for the weeks of March 23rd and March 30th

In North Smithfield, the foundation drilling activity for the 366 Line will follow the road work construction in the right-of-way from the Massachusetts state line at Central Street towards the West Farnum Substation on Greenville Road. Drill crews are currently in the right-of-way off Pratt Pond, Mountain Road and East Harkness Road. Crews will then move to the Providence-Worcester Railroad crossing at the rear of Branch River Industrial Park.

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Project Map

The Interstate Reliability Project encompasses approximately 15.4 miles of ROW in Massachusetts through the towns of Millbury (.7 mile), Sutton (6.2 miles), Northbridge (.3 mile), Uxbridge (7.6 miles), and Millville (.6 mile); and 22.5 miles in Rhode Island through the towns of North Smithfield (9.3 miles) and Burrillville (13.2 miles).

Notice: Utility rights-of-way are off limits to off-road drivers

National Grid reminds off-road drivers that utility rights-of-way are private property where unauthorized dumping and trespass by motorized vehicles is unlawful. These rights-of-way are a critical part of the company's electric and gas network. Limiting activities within the corridors protects the public, avoids damage to company facilities and supports the reliability of electric and gas service. For more information, click here.