Upper Salmon Falls A-Plant Diversion Dam
Key Takeaway
Upper Salmon Falls A-Plant Diversion Dam is classified as low hazard in Idaho. It was completed in 1937 and is 89 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 9 ft (taller than 1.3% in ID) |
| Dam Length | 1,380 ft |
| Dam Type | Concrete |
| Max Storage | 150 acre-ft |
| Normal Storage | 150 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 32,200 sq mi |
| Max Discharge | 84,000 cfs |
| Year Completed | 1937 (89 years old) |
| NID ID | ID83066 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Idaho Power Company
Private
Nearby Dams
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Significant Hazard 17 ftRavenscroft Diversion
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Low Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Upper Salmon Falls A-Plant Diversion Dam?
Upper Salmon Falls A-Plant Diversion Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Upper Salmon Falls A-Plant Diversion Dam?
Upper Salmon Falls A-Plant Diversion Dam is owned by Idaho Power Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Salmon Falls A-Plant Diversion Dam built?
Upper Salmon Falls A-Plant Diversion Dam was completed in 1937, making it 89 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 Upper Salmon Falls A-Plant Diversion Dam?
Upper Salmon Falls A-Plant Diversion Dam serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Upper Salmon Falls A-Plant Diversion Dam?
Upper Salmon Falls A-Plant Diversion Dam has a dam height of 9 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 Upper Salmon Falls A-Plant Diversion Dam last inspected?
Upper Salmon Falls A-Plant Diversion Dam was last inspected on September 20, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.