A-3 Detention is an earth dam located in Goshen County, Wyoming, built in 1969. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 2,650 ft long, taller than 68% 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 A-3 Detention
The primary purpose of A-3 Detention is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Angel Draw Drainage Dist. (joe Franks) (private). It impounds the Angell Draw near Lingle.
The dam stands 30 feet tall and stretches 2,650 feet across, creates a reservoir covering 89 acres, has a maximum storage capacity of 1,334 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1969, 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. 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 04/19/2022.
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Location
| State | Wyoming |
| County | Goshen |
| Nearest City | Lingle |
| River/Stream | Angell Draw |
| Coordinates | 42.07056, -104.34972 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 2,650 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 1,334 acre-ft |
| Max Storage | 1,334 acre-ft |
| Normal Storage | 800 acre-ft |
| Surface Area | 89 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 3,117 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Angel Draw Drainage Dist. (joe Franks) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/19/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01533 |
| Federal ID | WY01533 |
| More Info | State Dam Safety Program |