Hyatt
Key Takeaway
Hyatt is classified as high hazard in Oregon. It was completed in 1921 and is 105 years old. Its primary use is hydroelectric. 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 | 47 ft (taller than 82.9% in OR) |
| Dam Length | 775 ft |
| Dam Type | Rockfill |
| Max Storage | 25.1K acre-ft |
| Normal Storage | 16.2K acre-ft |
| Surface Area | 1,120 acres |
| Drainage Area | 12 sq mi |
| Year Completed | 1921 (105 years old) |
| NID ID | OR00591 |
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
RECLAMATION
Federal Government
Nearby Dams
Little Hyatt Dam
Jackson, OR
Low HazardKeene Creek
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High Hazard 67 ftHoward Prairie
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High Hazard 100 ftCharley Horse Reservoir
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Low Hazard 26 ftEmigrant
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High Hazard 204 ftGrizzley Creek Reservoir No. 2
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Low Hazard 10 ftBounds Reservoir
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Significant Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Hyatt?
Hyatt 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 Hyatt?
Hyatt is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hyatt built?
Hyatt was completed in 1921, making it 105 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 Hyatt?
Hyatt serves the following purposes: Hydroelectric, Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hyatt?
Hyatt has a dam height of 47 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 Hyatt last inspected?
Hyatt was last inspected on August 4, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.