Bowman Arch
Key Takeaway
Bowman Arch is classified as high hazard in California. It was completed in 1927 and is 99 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 | 105 ft (taller than 83.1% in CA) |
| Dam Length | 567 ft |
| Dam Type | Arch |
| Max Storage | 68.5K acre-ft |
| Normal Storage | 63.7K acre-ft |
| Surface Area | 810 acres |
| Drainage Area | 29 sq mi |
| Max Discharge | 19,500 cfs |
| Year Completed | 1927 (99 years old) |
| NID ID | CA00245 |
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
Nevada Irrigation District
Public Utility
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Low Hazard 19 ftFrequently Asked Questions
What is the hazard classification of Bowman Arch?
Bowman Arch 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 Bowman Arch?
Bowman Arch is owned by Nevada Irrigation District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Bowman Arch built?
Bowman Arch was completed in 1927, making it 99 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 Bowman Arch?
Bowman Arch serves the following purposes: Irrigation, Recreation, Hydroelectric, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Bowman Arch?
Bowman Arch has a dam height of 105 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 Bowman Arch last inspected?
Bowman Arch was last inspected on August 24, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.