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 November 17th and November 24th

The installation of structures for the new line has been completed along the route from the Millbury #3 Substation across the Blackstone River, crossing Providence Street (Route 122A) and continuing towards the Sutton town line. Cable pulling activity is underway at the completed structures.


A half-dozen drilling crews will continue to prepare the structure sites for the foundation crews at various sites along the route of the transmission corridor.


Some structure installation activity will occur in the right-of-way behind Heritage Road, Atlas Box, Boston Road, Central Pike and Smith Road, all the way to the intersection of Route 146.

Project Update Notice - Rhode Island for the weeks of November 17th and November 24th

The remaining tree clearing work near the Connecticut state line in Burrillville will completed by the end of November. We appreciate the cooperation and patience provided to the crews from abutters and landowners along the way.


Over the next few weeks, mowing, the installation of swamp mats and access aprons, and road construction will continue in North Smithfield along the route of the new 366 Line. The initial work that started in Rhode Island at Central Street crossing Connector Road, Mountain Road, East Harkness Road, Victory Highway and School Street has been completed.

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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.

Notice: Hunting season and the safety of our workers

With the onset of hunting seasons in Massachusetts and Rhode Island, we ask hunters to refrain from hunting on and around the Interstate Reliability Project rights-of-way and access corridors. The Project areas are active work zones for well over 100 workers through 2015. The safety of our workers is paramount, and we ask for your cooperation and consideration as you make your hunting plans.