NorthWestern Corporation d/b/a NorthWestern Energy is an investor-owned utility and one of the largest providers of electricity and natural gas in the northwest quadrant of the United States. We serve approximately 656,000 customers – 392,600 electric and 263,700 natural gas – in Montana, South Dakota and Nebraska. Classified as a “mid-sized” utility by most industry standards, our service territory size is one of the largest in the country. The foundation of NorthWestern’s energy business dates back to 1923, with the start of the utility operations in a few communities in South Dakota and Nebraska. Our electric system serves 297 communities and surrounding rural areas covering two-thirds of Montana, eastern South Dakota, and Yellowstone National Park in Wyoming. Our natural gas system serves 169 communities and surrounding rural areas in Montana, South Dakota and central Nebraska. NorthWestern Energy has approximately 1,362 full-time employees. Our corporate headquarters is in Sioux Falls, S.D., with operational headquarters in Butte, Mont., and Huron, S.D. Montana Operations: Electric transmission and distribution services to approximately 332,500 customers in 187 communities Electric transmission lines - 7,000 miles Electric distribution lines - 21,000 miles Natural gas transmission and distribution services to approximately 179,200 customers in 105 communities Natural gas transmission lines - 2,000 miles Natural gas distribution lines - 4,000 miles Approximately 1,035 employees South Dakota/Nebraska Operations: Electric distribution services to approximately 60,100 customers in 110 communities Electric transmission and distribution lines - 3,200 miles Natural gas distribution services to approximately 84,500 customers in 60 communities in South Dakota and four communities in southcentral Nebraska Natural gas distribution lines - 2,200 miles Approximately 327 employees