Chevally Reservoir is an earth dam located in Malheur County, Oregon, built in 1933. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 400 ft long, taller than 68% of U.S. dams with a recorded height. 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 Chevally Reservoir
The primary purpose of Chevally Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by C.e. Odom (private). It impounds the Cow Creek, (offstream) near Sheaville.
The dam stands 30 feet tall and stretches 400 feet across, creates a reservoir covering 60 acres, has a maximum storage capacity of 406 acre-feet, and collects water from a drainage area of 50 square miles. Completed in 1933, the structure is well-established, with more than 75 years of service.
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 09/25/2017.
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Location
| State | Oregon |
| County | Malheur |
| Nearest City | Sheaville |
| River/Stream | Cow Creek, (offstream) |
| Coordinates | 43.10395, -117.10136 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 22 ft |
| Dam Length | 400 ft |
| Year Completed | 1933 (93 years old) |
Storage & Hydraulics
| NID Storage | 406 acre-ft |
| Max Storage | 406 acre-ft |
| Normal Storage | 406 acre-ft |
| Surface Area | 60 acres |
| Drainage Area | 50 sq mi |
Ownership & Safety
| Purpose | Irrigation |
| Owner | C.e. Odom |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/25/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00664 |
| Federal ID | OR00664 |
| More Info | State Dam Safety Program |