American Gas Association (AGA)
American Public Gas Association (APGA)
American Public Power Association (APPA)
American Water Works Associtaion (AWWA)
Illinois Commerce Commission (ICC)
Illinois Environmental Protection Agency (IEPA)
Illinois Municipal Electric Agency (IMEA)
Illinois Rural Water Association (IRWA)
Joint Utility Locating Information for Excavators (JULIE)
National Rural Water Association (NRWA)
U.S. Department of Agriculture, Rural Development (USDA)