Janes Flat
Key Takeaway
Janes Flat is classified as significant hazard in California. It was completed in 1918 and is 108 years old. Its primary use is irrigation. 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 | 785 ft |
| Dam Type | Earth |
| Max Discharge | 780 cfs |
| Year Completed | 1918 (108 years old) |
| NID ID | CA00464 |
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
USDA FS
Federal Government
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Low Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Janes Flat?
Janes Flat 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 Janes Flat?
Janes Flat is owned by USDA FS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Janes Flat built?
Janes Flat 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 Janes Flat?
Janes Flat serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Janes Flat?
Janes Flat 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 Janes Flat last inspected?
Janes Flat was last inspected on September 28, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.