Mehlhorn and Bassett is an earth dam located in Baker County, Oregon, built in 1939. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 330 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 Mehlhorn and Bassett
The primary purpose of Mehlhorn and Bassett is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Elmer Douglas (private). It impounds the Clear Creek near Copperfield.
The dam stands 20 feet tall and stretches 330 feet across, creates a reservoir covering 27 acres, has a maximum storage capacity of 216 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1939, 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 10/15/2020.
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Location
| State | Oregon |
| County | Baker |
| Nearest City | Copperfield |
| River/Stream | Clear Creek |
| Coordinates | 45.05864, -117.12998 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 330 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 216 acre-ft |
| Max Storage | 216 acre-ft |
| Normal Storage | 216 acre-ft |
| Surface Area | 27 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 230 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Elmer Douglas |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/15/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00120 |
| Federal ID | OR00120 |
| More Info | State Dam Safety Program |