Mormon
Key Takeaway
Mormon is classified as high hazard in Idaho. It was completed in 1908 and is 118 years old. Its primary use is other. 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 | 27 ft (taller than 48.6% in ID) |
| Dam Length | 600 ft |
| Normal Storage | 19.3K acre-ft |
| Surface Area | 2,440 acres |
| Drainage Area | 61 sq mi |
| Max Discharge | 1,250 cfs |
| Year Completed | 1908 (118 years old) |
| Year Modified | 1984 |
| NID ID | ID00024 |
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
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Mormon?
Mormon 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 Mormon?
Mormon is owned by information not available (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mormon built?
Mormon was completed in 1908, making it 118 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 Mormon?
Mormon serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mormon?
Mormon has a dam height of 27 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 Mormon last inspected?
Mormon was last inspected on June 2, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.