Hours Of Operations NorthWestern Energy South Dakota Clear Lake 57226 NorthWestern Energy Hours of Operation and Location in Clear Lake, SD 57226 4.3 - 29 votes 1010 3rd Ave S, Clear Lake, SD 57226 (605) 874-2235 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 Clear LakeView More Apparel Express Recommend For You Otter Tail Power Company Runnings Farm & Fleet Ferrellgas Toys R Us A Healing Touch A Nails A New Image A New Look A Perfect 10 A Plus Nails