Lake Buck, located in Sierra County, California, is a privately owned earth dam constructed in 1951 primarily for flood risk reduction. With a height of 37 feet and a storage capacity of 140 acre-feet, this dam on Long Valley Creek serves multiple purposes including irrigation and water supply. The dam spans 500 feet and covers a surface area of 9.4 acres, making it a vital resource for the local community in Border Town.

Maintained by the California Department of Water Resources and regulated by the Safety of Dams agency, Lake Buck has a low hazard potential and is currently in fair condition as of the last assessment in 2017. The dam is inspected annually to ensure its structural integrity and safety. While there are no associated structures or locks, the dam's importance lies in its role in managing water resources and mitigating flood risks in the region. Enthusiasts of water resources and climate resilience will find Lake Buck to be a fascinating example of sustainable infrastructure in action.

Situated in a picturesque setting and overseen by the Natural Resources Conservation Service, Lake Buck stands as a testament to the collaborative efforts between private owners and state agencies in managing water resources effectively. As climate change continues to impact water availability and extreme weather events, the role of dams like Lake Buck in safeguarding communities and ecosystems becomes increasingly crucial. With its history of service since the 1950s, Lake Buck remains a vital asset for the region, embodying the intersection of water management, infrastructure resilience, and environmental stewardship.