Arizona Public Service Company (APS)
Phoenix, Arizona

Bureau of Indian Affairs (BIA)
Coolidge, Arizona

Imperial Irrigation District (IID)
Imperial, Arizona

Nevada Power Company (NPC)
Las Vegas, Nevada

Salt River Project (SRP)
Kingman, Arizona

Unisource Energy Services (UES)
Kingman, Arizona

Western Area Power Administraion (WAPA)
Phoenix, Arizona