Little Willow Creek Reservoir is an earth dam located in Jefferson County, Oregon, built in 1954. It carries a Low hazard potential classification.
Dam profile
NID height · 43 ft43 ft tall and 1,000 ft long, taller than 89% 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 Little Willow Creek Reservoir
The primary purpose of Little Willow Creek Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Haycreek Ranch (private). It impounds the Little Willow Creek near Maupin.
The dam stands 43 feet tall and stretches 1,000 feet across, creates a reservoir covering 57 acres, has a maximum storage capacity of 1,140 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1954, the structure is well into its service life at over 50 years 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 02/20/2020.
At 43 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | Oregon |
| County | Jefferson |
| Nearest City | Maupin |
| River/Stream | Little Willow Creek |
| Coordinates | 44.62829, -120.87194 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 1,140 acre-ft |
| Max Storage | 1,140 acre-ft |
| Normal Storage | 96 acre-ft |
| Surface Area | 57 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 425 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Haycreek Ranch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 02/20/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00235 |
| Federal ID | OR00235 |
| More Info | State Dam Safety Program |