North Roy
Key Takeaway
North Roy is classified as low hazard in Montana. It was completed in 1964 and is 62 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 27 ft (taller than 79.3% in MT) |
| Dam Length | 465 ft |
| Dam Type | Earth |
| Max Storage | 415 acre-ft |
| Normal Storage | 390 acre-ft |
| Max Discharge | 390 cfs |
| Year Completed | 1964 (62 years old) |
| NID ID | MT00170 |
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
S HOLLAND
Private
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Low HazardFrequently Asked Questions
What is the hazard classification of North Roy?
North Roy 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 North Roy?
North Roy is owned by S HOLLAND (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was North Roy built?
North Roy was completed in 1964, making it 62 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 North Roy?
North Roy serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is North Roy?
North Roy has a dam height of 27 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.