Lafayette, also known as the Lafayette Reservoir, is a vital water resource located in Lafayette, California. Owned and regulated by the state, this public utility serves as a key source of water supply for the region. The dam, completed in 1929, stands at a height of 132 feet and has a storage capacity of 4250 acre-feet. Situated on Lafayette Creek, the reservoir covers a surface area of 126 acres and has a drainage area of 1.34 square miles.

Despite being classified as having a high hazard potential, the dam at Lafayette is in fair condition as of the last assessment in September 2017. Regular inspections are conducted, with the last one taking place in December 2020. The emergency action plan (EAP) for the dam was last revised in January 2020. Operated by the state and meeting regulatory guidelines for safety, Lafayette serves as a critical infrastructure for water supply and management in Contra Costa County.

With its strategic location and significant storage capacity, Lafayette plays a crucial role in ensuring water security for the surrounding communities. As a well-maintained earth dam, it stands as a testament to the state's commitment to water resource management and safety. For water resource and climate enthusiasts, Lafayette represents a key piece of infrastructure that showcases the intersection of public utility, regulatory oversight, and environmental stewardship in the face of evolving climate challenges.