Natural Gas Storage

At PSE, we carefully manage our gas-supply portfolio to reduce financial risks and control costs. One way we do this is by buying and storing significant amounts of natural gas during the summer months, when wholesale gas prices and customer demand are low.

We store it in large underground facilities and then withdraw it in winter when customer usage is highest, ensuring that a reliable supply of gas is available when you need it most.

Jackson Prairie

Jackson Prairie Underground Natural Gas Storage Facility

We co-own and operate the Pacific Northwest's largest natural gas storage depot, the Jackson Prairie Underground Natural Gas Storage Facility in Lewis County.

The 14th largest gas-storage reserve in the country, the 3,200-acre reservoir can hold about 44 billion cubic feet of natural gas. First opened in 1970, Jackson Prairie's natural gas reserves can meet up to 25 percent of the Pacific Northwest's peak demand on our coldest winter days.

PSE also stores up to 12.9 billion cubic feet of natural gas in Questar's Clay Basin underground facility in northeast Utah.


Fact sheet

Jackson Prairie Underground Natural Gas Storage Facility