Delmoe Lake Dam
Key Takeaway
Delmoe Lake Dam is classified as high hazard in Montana. It was completed in 1914 and is 112 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 | 60 ft (taller than 97.6% in MT) |
| Dam Length | 290 ft |
| Dam Type | Earth |
| Max Storage | 9.9K acre-ft |
| Normal Storage | 6.6K acre-ft |
| Surface Area | 310 acres |
| Drainage Area | 23 sq mi |
| Max Discharge | 1,900 cfs |
| Year Completed | 1914 (112 years old) |
| NID ID | MT00117 |
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
PIPESTONE WATER USERS
Private
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High Hazard 101 ftFrequently Asked Questions
What is the hazard classification of Delmoe Lake Dam?
Delmoe Lake Dam 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 Delmoe Lake Dam?
Delmoe Lake Dam is owned by PIPESTONE WATER USERS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Delmoe Lake Dam built?
Delmoe Lake Dam was completed in 1914, making it 112 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 Delmoe Lake Dam?
Delmoe Lake Dam serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Delmoe Lake Dam?
Delmoe Lake Dam has a dam height of 60 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 Delmoe Lake Dam last inspected?
Delmoe Lake Dam was last inspected on October 16, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.