John Orr
Key Takeaway
John Orr is classified as low hazard in California. It was completed in 1959 and is 67 years old. Its primary use is water supply.
Physical Details
| Dam Height | 20 ft (taller than 15.3% in CA) |
| Dam Length | 590 ft |
| Dam Type | Earth |
| Max Storage | 152 acre-ft |
| Surface Area | 36 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1959 (67 years old) |
| NID ID | CA00615 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Private Entity
Private
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High Hazard 90 ftFrequently Asked Questions
What is the hazard classification of John Orr?
John Orr is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates John Orr?
John Orr is owned by Private Entity (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was John Orr built?
John Orr was completed in 1959, making it 67 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 John Orr?
John Orr serves the following purposes: Water Supply, Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is John Orr?
John Orr has a dam height of 20 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 John Orr last inspected?
John Orr was last inspected on December 9, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.