Post Falls Earth Dike
Key Takeaway
Post Falls Earth Dike is classified as high hazard in Idaho. It was completed in 1990 and is 36 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 | 16 ft (taller than 13.6% in ID) |
| Dam Length | 40 ft |
| Dam Type | Earth |
| Normal Storage | 225.0K acre-ft |
| Surface Area | 48,000 acres |
| Drainage Area | 3,784 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1990 (36 years old) |
| NID ID | ID00220 |
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
Avista Corporation
Private
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Low HazardFrequently Asked Questions
What is the hazard classification of Post Falls Earth Dike?
Post Falls Earth Dike 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 Post Falls Earth Dike?
Post Falls Earth Dike is owned by Avista Corporation (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Post Falls Earth Dike built?
Post Falls Earth Dike was completed in 1990, making it 36 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 Post Falls Earth Dike?
Post Falls Earth Dike serves the following purposes: Hydroelectric, Other, Fish And Wildlife Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Post Falls Earth Dike?
Post Falls Earth Dike has a dam height of 16 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 Post Falls Earth Dike last inspected?
Post Falls Earth Dike was last inspected on August 17, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.