Home About Careers Events Community Programs News Contact Our Communities East River’s main campus is located in Madison, South Dakota. We also operate eight regional service centers. Our Facilities East River’s main campus is located in historic downtown Madison, a bustling lake community in the heart of eastern South Dakota. A remodel of East River’s main campus building was completed and dedicated in 2012 and was the final phase of a multi-building project. Our remodeled main campus features ample natural lighting and utilizes daylight harvesting to adjust light levels according to the amount of sunlight. The building is furnished with modern workspaces as well as high-tech conference rooms and board room to foster collaboration and productivity. Other features include a spacious breakroom with a full kitchen, open plan configurations and more. East River also operates eight regional service centers in: Aberdeen (1) Beresford (2) Brandon (3) Marshall, MN (4) Madison (5) Milbank (6) Miller (7) Mitchell (8) Thinking of relocating to Madison? Madison boasts a family-friendly, small town atmosphere with a wealth of modern amenities including the new Madison Regional Hospital, the high-tech campus of Dakota State University, a thriving community center and more. The town is centered between two lakes, provides ample hunting and fishing opportunities and is a short drive from many of eastern South Dakota’s most popular attractions. Learn more about the community and surrounding areas on the Madison Chamber of Commerce, Madison Works, and City of Madison websites. MEMBER AREA Member/Board Grid Web Portal Users Load Control Status Load Management Database Technician Access EMPLOYEE AREA Employee Grid Integrity GIS Timesheet Worklete Login NEWS AREA Community Construction Updates Latest News East River Electric Power Cooperative, Inc. PO Box 227 | 211 South Harth Ave. Madison, SD 57042-0227 © 2021 East River Electric Power Cooperative, Inc.