Willow Valley Reservoir
Key Takeaway
Willow Valley Reservoir is classified as low hazard in Oregon. It was completed in 1961 and is 65 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 34 ft (taller than 68.2% in OR) |
| Dam Length | 2,980 ft |
| Dam Type | Earth |
| Max Storage | 2.2K acre-ft |
| Normal Storage | 2.0K acre-ft |
| Surface Area | 127 acres |
| Drainage Area | 58 sq mi |
| Max Discharge | 4,050 cfs |
| Year Completed | 1961 (65 years old) |
| NID ID | OR00376 |
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
WILLOW VALLEY RANCH, C/O DARREL BAGLEY
Private
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Low Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Willow Valley Reservoir?
Willow Valley 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 Willow Valley Reservoir?
Willow Valley Reservoir is owned by WILLOW VALLEY RANCH, C/O DARREL BAGLEY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Willow Valley Reservoir built?
Willow Valley Reservoir was completed in 1961, making it 65 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 Willow Valley Reservoir?
Willow Valley 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 Willow Valley Reservoir?
Willow Valley Reservoir has a dam height of 34 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.
When was Willow Valley Reservoir last inspected?
Willow Valley Reservoir was last inspected on August 12, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.