Jordanelle Reservoir is a reservoir in Wasatch County, Utah, United States, just north of Heber City. Jordanelle Reservoir is fed and drained primarily by the Provo River, and is impounded by the Jordanelle Dam, an earthen dam. The construction of the dam resulted in the reroutings of both U.S. Route 40 and U.S. Route 189 (which now run concurrently over the summit of nearby mountains) and the submergence of the towns of Keetley, Hailstone, and Jordanelle.