The Grand River Dam Authority s primary job is to control, store and preserve, within the boundaries of the district, the water of the Grand River and its tributaries for any useful purpose. GRDA fulfills its responsibilities by operating three hydroelectric facilities and managing two lakes along the Grand River system. These facilities, along with the GRDA Coal-Fired Complex (thermal generation), combine for a total generation capability of 1,480 megawatts (MW). GRDA transmits and delivers this wholesale electricity across its 24-county service area in northeast Oklahoma via sophisticated energy delivery systems. GRDA sells electricity to three customer classes: municipals, electric cooperatives and industries.