Harrison
Key Takeaway
Harrison is classified as significant hazard in Oregon. It was completed in 1968 and is 58 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 26 ft (taller than 49.6% in OR) |
| Dam Length | 760 ft |
| Dam Type | Earth |
| Max Storage | 500 acre-ft |
| Normal Storage | 234 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 2,489 cfs |
| Year Completed | 1968 (58 years old) |
| NID ID | OR00460 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
CASCADE RANCHES
Private
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High Hazard 55 ftFrequently Asked Questions
What is the hazard classification of Harrison?
Harrison is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Harrison?
Harrison is owned by CASCADE RANCHES (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Harrison built?
Harrison was completed in 1968, making it 58 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 Harrison?
Harrison 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 Harrison?
Harrison has a dam height of 26 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 Harrison last inspected?
Harrison was last inspected on November 26, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.