Cowan Reservoir
Key Takeaway
Cowan Reservoir is classified as low hazard in Montana. It was completed in 1936 and is 90 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 20 ft (taller than 44.5% in MT) |
| Dam Length | 990 ft |
| Dam Type | Earth |
| Max Storage | 211 acre-ft |
| Normal Storage | 89 acre-ft |
| Max Discharge | 120 cfs |
| Year Completed | 1936 (90 years old) |
| NID ID | MT01574 |
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
COWAN & SON INC
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Cowan Reservoir?
Cowan Reservoir 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 Cowan Reservoir?
Cowan Reservoir is owned by COWAN & SON INC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Cowan Reservoir built?
Cowan Reservoir was completed in 1936, making it 90 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 Cowan Reservoir?
Cowan Reservoir 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 Cowan Reservoir?
Cowan Reservoir has a dam height of 20 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.