San Antonio
Key Takeaway
San Antonio is classified as high hazard in California. It was completed in 1965 and is 61 years old. Its primary use is flood risk reduction. 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 | 202 ft (taller than 94.8% in CA) |
| Dam Length | 1,433 ft |
| Dam Type | Earth |
| Max Storage | 350.0K acre-ft |
| Surface Area | 5,720 acres |
| Drainage Area | 353 sq mi |
| Year Completed | 1965 (61 years old) |
| NID ID | CA00813 |
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
Monterey County Water Resources Agency
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of San Antonio?
San Antonio 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 San Antonio?
San Antonio is owned by Monterey County Water Resources Agency (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was San Antonio built?
San Antonio was completed in 1965, making it 61 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 San Antonio?
San Antonio serves the following purposes: Flood Risk Reduction, Irrigation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is San Antonio?
San Antonio has a dam height of 202 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 San Antonio last inspected?
San Antonio was last inspected on May 25, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.