The MPSC has until February 2, 2010, to determine whether the supplemental filing meets the MPSC’s minimum filing requirements.
If the supplemental filing is found to meet minimal filing requirements, NorthWestern agreed to extend the timeframe by which the MPSC must issue a final order concerning the general rate filing by 90 days to October 11, 2010.
In its rate case filing, NorthWestern proposed a revenue requirement increase of approximately $1.96m for its natural gas utility and approximately $15.5m for its electric utility.
NorthWestern Energy provides electricity and natural gas in the Upper Midwest and Northwest, serving approximately 656,000 customers in Montana, South Dakota and Nebraska.
