Electricity Power Supplier: Black Hills Corporation/Black Hills Power & Light Company For further information contact: Black Hills Power & Light Company PO Box 1400, Rapid City, SD 57709-1400 Telephone: (605) 348-1700 Power Supplier: West River Electric Association For further information contact: West River Electric Association PO Box 3486, Rapid City, SD 57709-3486 Telephone: (605) 393-1500 Power Supplier: Black Hills Electric Co-op For further information contact: Black Hills Electric Co-op PO Box 792 Custer, SD 57730 Telephone: (605) 673-4461 Natural Gas Gas Supplier: Montana-Dakota Utilities Co. For further information contact: Montana-Dakota Utilities Co. PO Box 1060, Rapid City, SD 57709 Telephone: (605) 342-0160 Sewers City of Rapid City Storm Sewer: 30% Coverage Sanitary Sewer: 100% Coverage Treatment Plant: Advanced, mechanical biological Capacity: 13.5 million gallons Present Load: 8.5 million gallons per day Solid Waste Disposal: Dedicated land spreading Water Water Supplier: City of Rapid City Source: 9 deep wells and surface water Maximum Daily Capacity: 56 million gallons per day Peak Load: 1988: 29 million gallons Storage Capacity: 20.2 million gallons