Hours Of Operations NorthWestern Energy Montana Bigfork 59911 NorthWestern Energy Hours of Operation and Location in Bigfork, MT 59911 4.5 - 42 votes (800) 608-8340 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 BigforkView More Apparel RainbowExpressAvenueDeb Recommend For You Carpet & Upholstery Cleaning Carpet Cleaning & Upholstery G & G Electric Bellagio Salon Ferrellgas Toys R Us A Nails A Plus Roofing A Salon A Step Ahead