Willow Butte is a gravity dam located in Harney County, Oregon, built in 2004. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 25 ft25 ft tall and 840 ft long, taller than 50% 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 concrete gravity section and the water level is illustrative.
About Willow Butte
The primary purpose of Willow Butte is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Doi BLM (federal). It impounds the Unnamed to Willow Creek.
The dam stands 25 feet tall and stretches 840 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 16 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2004, the structure is relatively new.
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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 09/25/2019.
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Location
| State | Oregon |
| County | Harney |
| Nearest City | None |
| River/Stream | Unnamed to Willow Creek |
| Coordinates | 42.18237, -118.30388 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 25 ft |
| Dam Length | 840 ft |
| Year Completed | 2004 (22 years old) |
Storage & Hydraulics
| NID Storage | 16 acre-ft |
| Max Storage | 16 acre-ft |
| Normal Storage | 1 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 816 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/25/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR04047 |
| Federal ID | OR04047 |
| More Info | State Dam Safety Program |