Two Wash Detention is a gravity dam located in Washakie County, Wyoming, built in 2003. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 37 ft37 ft tall and 358 ft long, taller than 83% 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 Two Wash Detention
The primary purpose of Two Wash Detention is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Doi BLM (federal). It impounds the Shorty's Draw Big Horn River near Worland Wy.
The dam stands 37 feet tall and stretches 358 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 150 acre-feet, and collects water from a drainage area of 2,290 square miles. Completed in 2003, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 08/02/2016. That was over 10 years ago.
At 37 feet, this dam is taller than 83% of dams nationwide.
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Location
| State | Wyoming |
| County | Washakie |
| Nearest City | Worland Wy |
| River/Stream | Shorty's Draw Big Horn River |
| Coordinates | 43.84878, -107.68263 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 37 ft |
| Dam Length | 358 ft |
| Year Completed | 2003 (23 years old) |
Storage & Hydraulics
| NID Storage | 377 acre-ft |
| Max Storage | 150 acre-ft |
| Normal Storage | 377 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 2,290 sq mi |
| Max Discharge | 300 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/02/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01421 |
| Federal ID | WY01421 |
| More Info | State Dam Safety Program |