Black Canyon Diversion
Key Takeaway
Black Canyon Diversion is classified as high hazard in Idaho. It was completed in 1923 and is 103 years old. Its primary use is hydroelectric. 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 | 183 ft (taller than 97.4% in ID) |
| Dam Length | 1,040 ft |
| Dam Type | Concrete |
| Max Storage | 29.8K acre-ft |
| Normal Storage | 29.8K acre-ft |
| Surface Area | 1,100 acres |
| Drainage Area | 2,680 sq mi |
| Max Discharge | 39,060 cfs |
| Year Completed | 1923 (103 years old) |
| NID ID | ID00282 |
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
RECLAMATION
Federal Government
Nearby Dams
Haw Creek
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Significant Hazard 27 ftLittle (Upper Bissel Creek Dam)
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Significant Hazard 16 ftGatfield No 2
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Significant Hazard 20 ftSulphur Gulch
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Low Hazard 23 ftLodge Pond
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Significant Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Black Canyon Diversion?
Black Canyon Diversion 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 Black Canyon Diversion?
Black Canyon Diversion is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Black Canyon Diversion built?
Black Canyon Diversion was completed in 1923, making it 103 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 Black Canyon Diversion?
Black Canyon Diversion serves the following purposes: Hydroelectric, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Black Canyon Diversion?
Black Canyon Diversion has a dam height of 183 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 Black Canyon Diversion last inspected?
Black Canyon Diversion was last inspected on February 25, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.