Plat I
Key Takeaway
Plat I is classified as high hazard in Oregon. It was completed in 1967 and is 59 years old. Its primary use is flood risk reduction. 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 Height | 28 ft (taller than 54.8% in OR) |
| Dam Length | 1,236 ft |
| Dam Type | Earth |
| Max Storage | 2.8K acre-ft |
| Normal Storage | 870 acre-ft |
| Surface Area | 155 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 770 cfs |
| Year Completed | 1967 (59 years old) |
| NID ID | OR00443 |
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
SUTHERLIN WATER CONTROL DISTRICT
Local Government
Nearby Dams
Denley Brothers Dam
Douglas, OR
Low Hazard 22 ftCooper Creek (Sutherlin)
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High Hazard 84 ftGeorgia Pacific Log Pond
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Low Hazard 11 ftSutherlin Log Pond
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Significant Hazard 11 ftWhistlers Bend
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Low Hazard 33 ftSutherlin Mill (Fords Pond)
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Low Hazard 18 ftWinchester
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High Hazard 17 ftUpdegrave
Douglas, OR
High Hazard 30 ftFrequently Asked Questions
What is the hazard classification of Plat I?
Plat I 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 Plat I?
Plat I is owned by SUTHERLIN WATER CONTROL DISTRICT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Plat I built?
Plat I was completed in 1967, making it 59 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 Plat I?
Plat I serves the following purposes: Flood Risk Reduction, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Plat I?
Plat I has a dam height of 28 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 Plat I last inspected?
Plat I was last inspected on October 14, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.