Anchor South Dam
Key Takeaway
Anchor South Dam is classified as high hazard in Montana. It was completed in 1904 and is 122 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 | 11 ft (taller than 8.4% in MT) |
| Dam Length | 113 ft |
| Dam Type | Earth |
| Max Storage | 510 acre-ft |
| Normal Storage | 206 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 194 cfs |
| Year Completed | 1904 (122 years old) |
| NID ID | MT00821 |
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
BEAVERHEAD WATER CO
Private
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High Hazard 13 ftFrequently Asked Questions
What is the hazard classification of Anchor South Dam?
Anchor South 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 Anchor South Dam?
Anchor South Dam is owned by BEAVERHEAD WATER CO (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Anchor South Dam built?
Anchor South Dam was completed in 1904, making it 122 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 Anchor South Dam?
Anchor South 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 Anchor South Dam?
Anchor South Dam has a dam height of 11 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.