Eversource Energy is asking state regulators to approve a long-term natural gas supply contract that company officials say would cut costs for Massachusetts customers and reduce reliance on high-cost, imported liquefied natural gas delivered through the Everett Marine Terminal.
The company, which manages two natural gas utilities in Massachusetts — NSTAR Gas and Eversource Gas Company of Massachusetts — filed petitions with the Department of Public Utilities on Tuesday.
The filings came the same day that Enbridge, the Canadian-based energy infrastructure firm that owns the Algonquin Gas Transmission Pipeline, announced it had reached a final investment decision to move ahead with a $300 million expansion of its pipeline system. That expansion is designed to deliver about 75 million cubic feet per day of additional natural gas to the U.S. Northeast once it is completed in 2029…