San Justo
Key Takeaway
San Justo is classified as high hazard in California. It was completed in 1987 and is 39 years old. Its primary use is irrigation. 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 | 151 ft (taller than 90.2% in CA) |
| Dam Length | 1,115 ft |
| Dam Type | Earth |
| Max Storage | 11.7K acre-ft |
| Normal Storage | 10.3K acre-ft |
| Surface Area | 208 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1987 (39 years old) |
| NID ID | CA10323 |
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 San Justo?
San Justo 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 Justo?
San Justo is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was San Justo built?
San Justo was completed in 1987, making it 39 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 Justo?
San Justo serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is San Justo?
San Justo has a dam height of 151 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 Justo last inspected?
San Justo was last inspected on July 21, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.