Helen B
Key Takeaway
Helen B is classified as low hazard in Montana. It was completed in 1966 and is 60 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 81 ft (taller than 98.6% in MT) |
| Dam Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 123 acre-ft |
| Normal Storage | 58 acre-ft |
| Drainage Area | 5 sq mi |
| Max Discharge | 1,025 cfs |
| Year Completed | 1966 (60 years old) |
| NID ID | MT00619 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
EUNICE BURCH
Private
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Low Hazard 35 ftFrequently Asked Questions
What is the hazard classification of Helen B?
Helen B is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Helen B?
Helen B is owned by EUNICE BURCH (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Helen B built?
Helen B was completed in 1966, making it 60 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 Helen B?
Helen B 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 Helen B?
Helen B has a dam height of 81 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 Helen B last inspected?
Helen B was last inspected on January 1, 1968. Inspection dates indicate when a formal review occurred, not the results of that inspection.