Hog Flat, located in Susanville, California, is a private water supply dam on the Tr Susan River, completed in 1891. With a height of 15 feet and a hydraulic height of 11 feet, this earth dam has a storage capacity of 8,000 acre-feet and serves the purposes of irrigation and water supply. The dam has a high hazard potential but was deemed to be in satisfactory condition during its last assessment in September 2017.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Hog Flat undergoes regular inspections, with the last one taking place in September 2020. Despite its age, the dam continues to play a crucial role in water resource management in the region, providing essential water supply for agricultural and domestic use. The structure has a spillway type and width, but further details on its design and construction are not provided in the data.

Hog Flat's historical significance as a water storage facility underscores its importance in the local ecosystem and highlights the ongoing efforts to maintain its integrity in the face of changing climate conditions. As a key infrastructure supporting the community's water needs, this dam serves as a reminder of the delicate balance between water resource management and environmental conservation in the face of evolving climate challenges.