Prosser Creek
Key Takeaway
Prosser Creek is classified as high hazard in California. It was completed in 1962 and is 64 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 | 133 ft (taller than 87.7% in CA) |
| Dam Length | 1,830 ft |
| Dam Type | Earth |
| Max Storage | 41.2K acre-ft |
| Normal Storage | 29.8K acre-ft |
| Surface Area | 980 acres |
| Drainage Area | 50 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1962 (64 years old) |
| NID ID | CA10179 |
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
RECLAMATION
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Prosser Creek?
Prosser Creek 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 Prosser Creek?
Prosser Creek is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Prosser Creek built?
Prosser Creek was completed in 1962, making it 64 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 Prosser Creek?
Prosser Creek 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 Prosser Creek?
Prosser Creek has a dam height of 133 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 Prosser Creek last inspected?
Prosser Creek was last inspected on August 28, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.