Big (Phillips)
Key Takeaway
Big (Phillips) is classified as low hazard in Montana. It was completed in 1956 and is 70 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 25 ft (taller than 70.3% in MT) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 98 acre-ft |
| Normal Storage | 84 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,000 cfs |
| Year Completed | 1956 (70 years old) |
| NID ID | MT01330 |
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
L H BOYCE
Private
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Low Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Big (Phillips)?
Big (Phillips) 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 Big (Phillips)?
Big (Phillips) is owned by L H BOYCE (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Big (Phillips) built?
Big (Phillips) was completed in 1956, making it 70 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 Big (Phillips)?
Big (Phillips) 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 Big (Phillips)?
Big (Phillips) has a dam height of 25 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.