Sobrante Clearwell
Key Takeaway
Sobrante Clearwell is classified as high hazard in California. It was completed in 1964 and is 62 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 28 ft (taller than 27.2% in CA) |
| Dam Length | 1,032 ft |
| Dam Type | Earth |
| Max Storage | 25 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1964 (62 years old) |
| NID ID | CA00179 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
East Bay Municipal Utility District
Public Utility
Nearby Dams
Argyle No. 2
Contra Costa, CA
High Hazard 27 ftSan Pablo
Contra Costa, CA
High Hazard 170 ftMaloney
Contra Costa, CA
High Hazard 107 ftNorth
Contra Costa, CA
High Hazard 82 ftSan Pablo Clearwell
Contra Costa, CA
Low Hazard 42 ftC.L. Tilden Park
Contra Costa, CA
High Hazard 88 ftBriones
Contra Costa, CA
High Hazard 273 ftLake Orinda
Contra Costa, CA
High Hazard 45 ftFrequently Asked Questions
What is the hazard classification of Sobrante Clearwell?
Sobrante Clearwell is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Sobrante Clearwell?
Sobrante Clearwell is owned by East Bay Municipal Utility District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sobrante Clearwell built?
Sobrante Clearwell was completed in 1964, making it 62 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Sobrante Clearwell?
Sobrante Clearwell serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Sobrante Clearwell?
Sobrante Clearwell has a dam height of 28 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Sobrante Clearwell last inspected?
Sobrante Clearwell was last inspected on March 16, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.