Natural gas pipeline, with LNG storage tank in Epping, proposed by Liberty Utilities

  • A map of the route Liberty Utilities's project Granite Bridge would take. —Courtesy Liberty Utilities

  • Details of the Granite Bridge gas pipeline proposal, from Liberty Utilities Courtesy—Liberty Utilities

  • Details of the Granite Bridge gas pipeline proposal, from Liberty Utilities Courtesy—Liberty Utilities

Monitor staff
Published: 12/4/2017 9:03:52 PM

Liberty Utilities wants to put a natural-gas pipeline along Route 101 from Manchester to Stratham and connect existing pipelines alongside Interstate 93 and Interstate 95, and also create a large gas storage facility in Epping.

The $340 million proposal, which the company is calling Granite Bridge, was announced Monday.

Liberty Utilities said it wants to build a tank that would store natural gas in liquid form near Route 101’s Exit 6 on a roughly 15-acre former quarry “within a 140-acre property in Epping that (Liberty Utilities) would purchase,” the company said.

The company said the tank could hold 2 billion cubic feet of liquid natural gas, or LNG. It would be 150 to 170 feet high and approximately 200 feet in diameter.

A tank of that size would raise the total LNG storage capacity in New England by 10 percent, according to data from ISO-New England.

Increasing the amount of natural gas available in New England in winter, when the fuel is often used for home heating instead of running power plants, is one of ISO-NE’s key goals to stabilize the power grid. Natural gas is used to create about half of all the electricity in New England.

By connecting two major transmission pipelines, the 27-mile Granite Bridge pipeline would allow gas stored in the LNG tank to be quickly moved west, to Manchester and up to Concord, or east, to the Seacoast and down to Boston.

Liberty Utilities was a partner of the failed effort by Kinder Morgan to build a major gas trasmission pipeline through southern New Hampshire. That project drew considerable opposition in New Hampshire and Massachusetts, and it was scuttled due to lack of long-term contracts to support the billion-dollar cost.

The company’s press release and information about the proposal can be seen at  


David Brooks bio photo

David Brooks is a reporter and the writer of the sci/tech column Granite Geek and blog, as well as moderator of the monthly Science Cafe Concord events. After obtaining a bachelor’s degree in mathematics he became a newspaperman, working in Virginia and Tennessee before spending 28 years at the Nashua Telegraph . He joined the Monitor in 2015.

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