Corcoran is an earth dam located in Harney County, Oregon, built in 1949. It carries a Significant hazard potential classification.
Dam profile
NID height · 39 ft39 ft tall and 1,100 ft long, taller than 85% 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 Corcoran
The primary purpose of Corcoran is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Andy Root (private). It impounds the Rock Creek near No Downstream Settlement.
The dam stands 39 feet tall and stretches 1,100 feet across, creates a reservoir covering 39 acres, has a storage capacity of 1,630 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1949, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 10/29/2020.
At 39 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Oregon |
| County | Harney |
| Nearest City | No Downstream Settlement |
| River/Stream | Rock Creek |
| Coordinates | 43.65303, -118.66341 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 1,100 ft |
| Year Completed | 1949 (77 years old) |
Storage & Hydraulics
| NID Storage | 1,630 acre-ft |
| Normal Storage | 1,630 acre-ft |
| Surface Area | 39 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 518 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Andy Root |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 10/29/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00727 |
| Federal ID | OR00727 |
| More Info | State Dam Safety Program |