Shumway Reservoir is an earth dam located in Malheur County, Oregon, built in 1921. It carries a Low hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 1,123 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Shumway Reservoir
The primary purpose of Shumway Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Mary Arrien (private). It impounds the Unnamed near Juntura.
The dam stands 10 feet tall and stretches 1,123 feet across, creates a reservoir covering 92 acres, has a maximum storage capacity of 590 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1921, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 05/19/2016. That was over 10 years ago.
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Location
| State | Oregon |
| County | Malheur |
| Nearest City | Juntura |
| River/Stream | Unnamed |
| Coordinates | 43.55577, -117.95187 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 1,123 ft |
| Year Completed | 1921 (105 years old) |
Storage & Hydraulics
| NID Storage | 590 acre-ft |
| Max Storage | 590 acre-ft |
| Normal Storage | 590 acre-ft |
| Surface Area | 92 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 593 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Mary Arrien |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/19/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00074 |
| Federal ID | OR00074 |
| More Info | State Dam Safety Program |