Rock House Reservoir (Malheur)
Key Takeaway
Rock House Reservoir (Malheur) is classified as low hazard in Oregon. It was completed in 1956 and is 70 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 22 ft (taller than 36.2% in OR) |
| Dam Length | 963 ft |
| Dam Type | Earth |
| Max Storage | 391 acre-ft |
| Normal Storage | 391 acre-ft |
| Surface Area | 49 acres |
| Drainage Area | 175 sq mi |
| Max Discharge | 930 cfs |
| Year Completed | 1956 (70 years old) |
| NID ID | OR00254 |
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
WILLARD L. SMITH
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Rock House Reservoir (Malheur)?
Rock House Reservoir (Malheur) 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 Rock House Reservoir (Malheur)?
Rock House Reservoir (Malheur) is owned by WILLARD L. SMITH (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Rock House Reservoir (Malheur) built?
Rock House Reservoir (Malheur) was completed in 1956, making it 70 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 Rock House Reservoir (Malheur)?
Rock House Reservoir (Malheur) 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 Rock House Reservoir (Malheur)?
Rock House Reservoir (Malheur) has a dam height of 22 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 Rock House Reservoir (Malheur) last inspected?
Rock House Reservoir (Malheur) was last inspected on December 20, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.