Rigby, South
Key Takeaway
Rigby, South is classified as low hazard in Montana. It was completed in 1918 and is 108 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 15 ft (taller than 18.8% in MT) |
| Dam Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 138 acre-ft |
| Normal Storage | 54 acre-ft |
| Year Completed | 1918 (108 years old) |
| NID ID | MT00040 |
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
WILLIS B RIGBY_SR
Private
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Low Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Rigby, South?
Rigby, South 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 Rigby, South?
Rigby, South is owned by WILLIS B RIGBY_SR (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Rigby, South built?
Rigby, South was completed in 1918, making it 108 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 Rigby, South?
Rigby, South 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 Rigby, South?
Rigby, South has a dam height of 15 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.