The Big Sandy Mountaineer -

NorthWestern Energy has submitted its annual natural gas supply cost tracker to the Montana Public Service Commission for review and approval.

The annual tracking period begins July 1 and ends on the following June 30 of each calendar year. The supply cost rate that appears on customer bills fluctuates on a monthly basis depending on market supply costs and other factors. The annual filing serves to true-up actual vs. estimated costs over the previous period and set the new benchmark for coming tracker year. The rate, when multiplied by the customer’s usage, is included in the total bill...