Public Utilities All Categories... Public Utilities go Results Found: 8 Button group with nested dropdown Chairman's Circle Heartland Energy 432 S.E. 12th St. Madison SD 57042 (605) 256-6536 Visit Website Premier Level East River Electric Power Cooperative 211 S. Harth Ave. Madison SD 57042 (605) 256-4536 Visit Website Premier Level NorthWestern Energy 104 N. Egan Ave. Madison SD 57042 (800) 245-6977 Partner Level Bluepeak Internet 5100 S Broadband Ln Sioux Falls SD 57108 (605) 359-3811 Partner Level Bud's Clean Up Service 114 W. Center Street Madison SD 57042 (605) 256-2518 Partner Level Sioux Valley Energy 47092 SD Hwy 34 Colman SD 57017 (605) 534-3535 City of Madison 116 W. Center St. Madison SD 57042 (605) 256-7500 Midco 3901 N. Louise Ave. Sioux Falls SD 57107 (605) 357-5491