Ross No. 1
Key Takeaway
Ross No. 1 is classified as significant hazard in California. It was completed in 1957 and is 69 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 30.4% in CA) |
| Dam Length | 740 ft |
| Dam Type | Earth |
| Max Storage | 709 acre-ft |
| Surface Area | 53 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1957 (69 years old) |
| NID ID | CA00934 |
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
The McConnell Foundation
Private
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High Hazard 157 ftFrequently Asked Questions
What is the hazard classification of Ross No. 1?
Ross No. 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 Ross No. 1?
Ross No. 1 is owned by The McConnell Foundation (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Ross No. 1 built?
Ross No. 1 was completed in 1957, making it 69 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 Ross No. 1?
Ross No. 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 Ross No. 1?
Ross No. 1 has a dam height of 30 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 Ross No. 1 last inspected?
Ross No. 1 was last inspected on February 10, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.