Lake Eleanor

About Lake Eleanor

The primary purpose of Lake Eleanor is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by San Francisco Public Utilities Commission (local government). It impounds the Eleanor Creek near N/a.

The dam stands 61 feet tall and stretches 1,260 feet across, creates a reservoir covering 953 acres, has a maximum storage capacity of 28,600 acre-feet, and collects water from a drainage area of 80 square miles. Completed in 1918, the structure is over a century old.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/07/2025.

At 61 feet, this dam is taller than 95% of all dams in the United States.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The California dam safety program can provide more specific information about emergency planning for this structure.

Search for dams near your address to see all dams in your area with hazard classifications and safety data.