Milner Dam-Middle
Key Takeaway
Milner Dam-Middle is classified as high hazard in Idaho. It was completed in 1905 and is 121 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 | 80 ft (taller than 89.7% in ID) |
| Dam Length | 404 ft |
| Dam Type | Rockfill |
| Max Storage | 39.0K acre-ft |
| Normal Storage | 39.0K acre-ft |
| Surface Area | 4,000 acres |
| Drainage Area | 17,180 sq mi |
| Max Discharge | 116,850 cfs |
| Year Completed | 1905 (121 years old) |
| NID ID | ID00223 |
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
Milner Dam, Inc.
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Milner Dam-Middle?
Milner Dam-Middle 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 Milner Dam-Middle?
Milner Dam-Middle is owned by Milner Dam, Inc. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Milner Dam-Middle built?
Milner Dam-Middle was completed in 1905, making it 121 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 Milner Dam-Middle?
Milner Dam-Middle serves the following purposes: Irrigation, Recreation, Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Milner Dam-Middle?
Milner Dam-Middle has a dam height of 80 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 Milner Dam-Middle last inspected?
Milner Dam-Middle was last inspected on May 17, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.