Lost Lake - Uc is a Federal-owned water resource located in Woodland, Utah, within the Summit County. This reservoir, built in 1931 by the Bureau of Reclamation, serves primarily for irrigation purposes and is associated with the Lost Creek and Upper Provo River. With a structural height of 45 feet and a length of 930 feet, Lost Lake - Uc has a storage capacity of 1,660 acre-feet, with a normal storage level of 1,155 acre-feet. The spillway, with a width of 50 feet, is uncontrolled, posing a high hazard potential.

Despite its critical role in providing water for agriculture in the region, Lost Lake - Uc has a moderate risk assessment rating. The dam has not undergone a recent condition assessment, and updates on emergency action plans and risk management measures are not readily available. The reservoir is not regulated by the state of Utah and is managed by the Bureau of Reclamation, which also handles inspections and operations. Lost Lake - Uc is a significant component of the local water infrastructure, contributing to the water supply for the surrounding area and supporting the ecosystem of the Lost Creek and Upper Provo River watersheds.