Lower Diversion
Key Takeaway
Lower Diversion is classified as low hazard in Idaho. It was completed in 1982 and is 44 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 14 ft (taller than 9.3% in ID) |
| Dam Length | 1,380 ft |
| Dam Type | Gravity |
| Max Storage | 1.2K acre-ft |
| Normal Storage | 800 acre-ft |
| Surface Area | 100 acres |
| Drainage Area | 9,800 sq mi |
| Max Discharge | 75,000 cfs |
| Year Completed | 1982 (44 years old) |
| NID ID | ID00340 |
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
City of Idaho Falls
Local Government
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Low Hazard 23 ftFrequently Asked Questions
What is the hazard classification of Lower Diversion?
Lower Diversion 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 Lower Diversion?
Lower Diversion is owned by City of Idaho Falls (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lower Diversion built?
Lower Diversion was completed in 1982, making it 44 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 Lower Diversion?
Lower Diversion serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lower Diversion?
Lower Diversion has a dam height of 14 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 Lower Diversion last inspected?
Lower Diversion was last inspected on September 28, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.