Vandalia Diversion
Key Takeaway
Vandalia Diversion is classified as low hazard in Montana. It was completed in 1916 and is 110 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 32 ft (taller than 90.8% in MT) |
| Dam Length | 320 ft |
| Dam Type | Buttress |
| Max Storage | 1.4K acre-ft |
| Normal Storage | 465 acre-ft |
| Surface Area | 100 acres |
| Drainage Area | 6,500 sq mi |
| Max Discharge | 52,000 cfs |
| Year Completed | 1916 (110 years old) |
| NID ID | MT00584 |
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
RECLAMATION
Federal Government
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Low Hazard 13 ftFrequently Asked Questions
What is the hazard classification of Vandalia Diversion?
Vandalia Diversion 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 Vandalia Diversion?
Vandalia Diversion is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Vandalia Diversion built?
Vandalia Diversion was completed in 1916, making it 110 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 Vandalia Diversion?
Vandalia Diversion 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 Vandalia Diversion?
Vandalia Diversion has a dam height of 32 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.