Chino Ranch #1
Key Takeaway
Chino Ranch #1 is classified as significant hazard in California. It was completed in 1918 and is 108 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 22 ft (taller than 18.8% in CA) |
| Dam Length | 460 ft |
| Dam Type | Earth |
| Max Storage | 137 acre-ft |
| Surface Area | 20 acres |
| Year Completed | 1918 (108 years old) |
| NID ID | CA00755 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Tres Hermanos Conservation Authority
Public Utility
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High Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Chino Ranch #1?
Chino Ranch #1 is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Chino Ranch #1?
Chino Ranch #1 is owned by Tres Hermanos Conservation Authority (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Chino Ranch #1 built?
Chino Ranch #1 was completed in 1918, making it 108 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 Chino Ranch #1?
Chino Ranch #1 serves the following purposes: Water Supply, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Chino Ranch #1?
Chino Ranch #1 has a dam height of 22 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 Chino Ranch #1 last inspected?
Chino Ranch #1 was last inspected on June 9, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.