Happy Valley
Key Takeaway
Happy Valley is classified as high hazard in Oregon. It was completed in 1938 and is 88 years old. Its primary use is irrigation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Length | 397 ft |
| Max Storage | 490 acre-ft |
| Normal Storage | 360 acre-ft |
| Drainage Area | 13 sq mi |
| Max Discharge | 225 cfs |
| Year Completed | 1938 (88 years old) |
| NID ID | OR00694 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
BIA
Federal Government
Frequently Asked Questions
What is the hazard classification of Happy Valley?
Happy Valley is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Happy Valley?
Happy Valley is owned by BIA (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Happy Valley built?
Happy Valley was completed in 1938, making it 88 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 Happy Valley?
Happy Valley serves the following purposes: Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Happy Valley last inspected?
Happy Valley was last inspected on August 8, 2012. Inspection dates indicate when a formal review occurred, not the results of that inspection.