Round Valley
Key Takeaway
Round Valley is classified as high hazard in California. It was completed in 1877 and is 149 years old. Its primary use is hydroelectric. 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 | 29 ft (taller than 29% in CA) |
| Dam Length | 850 ft |
| Dam Type | Earth |
| Max Storage | 1.2K acre-ft |
| Normal Storage | 1.2K acre-ft |
| Surface Area | 96 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,800 cfs |
| Year Completed | 1877 (149 years old) |
| NID ID | CA00346 |
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
Pacific Gas and Electric Company
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Round Valley?
Round Valley 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 Round Valley?
Round Valley is owned by Pacific Gas and Electric Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Round Valley built?
Round Valley was completed in 1877, making it 149 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 Round Valley?
Round Valley serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Round Valley?
Round Valley has a dam height of 29 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 Round Valley last inspected?
Round Valley was last inspected on July 11, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.