Blackfoot
Key Takeaway
Blackfoot is classified as high hazard in Idaho. It was completed in 1911 and is 115 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 | 35 ft (taller than 64.3% in ID) |
| Dam Length | 360 ft |
| Dam Type | Earth |
| Normal Storage | 350.0K acre-ft |
| Surface Area | 18,000 acres |
| Drainage Area | 581 sq mi |
| Max Discharge | 15,450 cfs |
| Year Completed | 1911 (115 years old) |
| NID ID | ID00204 |
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
BIA
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Blackfoot?
Blackfoot 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 Blackfoot?
Blackfoot is owned by BIA (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Blackfoot built?
Blackfoot was completed in 1911, making it 115 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 Blackfoot?
Blackfoot serves the following purposes: Irrigation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Blackfoot?
Blackfoot has a dam height of 35 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 Blackfoot last inspected?
Blackfoot was last inspected on May 10, 2012. Inspection dates indicate when a formal review occurred, not the results of that inspection.