Fairmont Reservoir, located in the city of Fairmont, California, is a significant Earth dam completed in 1912 for the primary purpose of flood risk reduction along the Antelope Valley River. With a dam height of 121 feet and a hydraulic height of 112 feet, this reservoir has a storage capacity of 7,507 acre-feet and covers an area of 172 acres. The dam is state-regulated and inspected regularly by the Department of Water Resources (DWR) to ensure its safety and compliance with regulations.

Despite being primarily designed for flood risk reduction, Fairmont Reservoir also serves a secondary purpose of recreation for the local community. The dam is classified as having a significant hazard potential, but its condition assessment as of September 2017 was deemed satisfactory. Emergency action plans (EAP) for the reservoir are currently not prepared, and risk assessment and management measures are yet to be implemented. The last inspection conducted in February 2021 showed no immediate concerns, but the reservoir's operators must continue to monitor and maintain the dam to ensure its long-term safety and functionality for both flood control and recreational purposes.