Hours Of Operations NorthWestern Energy Montana Great Falls 59404 NorthWestern Energy Hours of Operation and Location in Great Falls, MT 59404 4.2 - 105 votes 6700 Rainbow Dam Rd, Great Falls, MT 59404 (406) 268-2300 Get Directions NorthWestern Energy Hours Category: Home & Garden Hours Hours may vary due to season or holiday reasons. For specific hours, please contact store directly. Map Explore Great FallsView More Apparel Sam's ClubRoss Dress for LessKmartBig LotsCarhartt Sports TargetVansColemanSnap FitnessLady Foot Locker Jewelry Sam's ClubKay JewelersAvonBon-TonJensen Jewelers Recommend For You A Nails A+ Roofing Alcoholics Anonymous A Plus Computer Bmc A & B Roofing A Better Way Chicago Title Insurance Company Computer Plus Computers Incorporated