NorthWestern Energy
40 East Broadway
Butte, MT, 59701
406.487.2114 (phone)
NorthWestern Energy, an investor-owned “mid-sized” public utility, serves approximately 388,000 electric and 262,000 natural gas customers in Montana, South Dakota and Nebraska, has one of the largest U.S. service territories, and is one of the largest providers of electricity and natural gas in the northwest quadrant of the U.S.

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