Grant Lake, located in Lee Vining, California, is a key water supply resource managed by the local government. Built in 1940, this Earth-type dam stands at a height of 87 feet and has a capacity of 47,525 acre-feet. With a surface area of 1,095 acres and a drainage area of 60 square miles, Grant Lake plays a crucial role in providing water for the region.

Managed by the Department of Water Resources and regulated by the Safety of Dams agency, Grant Lake boasts a high hazard potential but is currently in satisfactory condition. Despite its age, the dam undergoes regular inspections and has a designated emergency action plan in place. With Rush Creek as its primary source, Grant Lake serves as a vital water resource for the surrounding area, supporting various water supply purposes.

The dam's location within Mono County, California, highlights its importance in water management and climate resilience efforts. With a history dating back to the early 20th century, Grant Lake continues to play a crucial role in water supply and regulation, ensuring the safety and sustainability of the region's water resources in the face of changing climate conditions.