Grohs Reservoir
Key Takeaway
Grohs Reservoir is classified as low hazard in Oregon. It was completed in 1959 and is 67 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 14 ft (taller than 12.5% in OR) |
| Dam Length | 2,250 ft |
| Dam Type | Earth |
| Max Storage | 882 acre-ft |
| Normal Storage | 882 acre-ft |
| Surface Area | 99 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 241 cfs |
| Year Completed | 1959 (67 years old) |
| NID ID | OR00306 |
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
PHIL GROHS
Private
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Low Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Grohs Reservoir?
Grohs 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 Grohs Reservoir?
Grohs Reservoir is owned by PHIL GROHS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grohs Reservoir built?
Grohs Reservoir was completed in 1959, making it 67 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 Grohs Reservoir?
Grohs 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 Grohs Reservoir?
Grohs Reservoir has a dam height of 14 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 Grohs Reservoir last inspected?
Grohs Reservoir was last inspected on August 12, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.