Hours Of Operations NorthWestern Energy South Dakota Woonsocket 57385 NorthWestern Energy Hours of Operation and Location in Woonsocket, SD 57385 4.3 - 84 votes (605) 796-4315 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 WoonsocketView More Apparel DieselExpress Sports Vans Recommend For You Alcoholics Anonymous Convenience Store Express Stop Otter Tail Power Company Runnings Farm & Fleet Ferrellgas Toys R Us A Healing Touch A Nails A New Image