Blackhawk Lake
Key Takeaway
Blackhawk Lake is classified as significant hazard in Idaho. It was completed in 1968 and is 58 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 45 ft (taller than 75.8% in ID) |
| Dam Length | 490 ft |
| Normal Storage | 1.6K acre-ft |
| Surface Area | 95 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 178 cfs |
| Year Completed | 1968 (58 years old) |
| Year Modified | 1979 |
| NID ID | ID00131 |
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
Private
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High Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Blackhawk Lake?
Blackhawk Lake 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 Blackhawk Lake?
Blackhawk Lake is owned by information not available (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Blackhawk Lake built?
Blackhawk Lake was completed in 1968, making it 58 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 Blackhawk Lake?
Blackhawk Lake serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Blackhawk Lake?
Blackhawk Lake has a dam height of 45 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 Blackhawk Lake last inspected?
Blackhawk Lake was last inspected on May 8, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.