Donahue is an earth dam located in Laramie County, Wyoming, built in 1953. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 20 ft20 ft tall and 350 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 Donahue
The primary purpose of Donahue is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Donahue & Rutledge, Inc. (private). It impounds the Little Horse Creek near La Grange.
The dam stands 20 feet tall and stretches 350 feet across, creates a reservoir covering 10 acres, and has a maximum storage capacity of 119 acre-feet. Completed in 1953, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 07/10/2023.
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Location
| State | Wyoming |
| County | Laramie |
| Nearest City | La Grange |
| River/Stream | Little Horse Creek |
| Coordinates | 41.49361, -104.38722 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 350 ft |
| Year Completed | 1953 (73 years old) |
Storage & Hydraulics
| NID Storage | 119 acre-ft |
| Max Storage | 119 acre-ft |
| Normal Storage | 56 acre-ft |
| Surface Area | 10 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Donahue & Rutledge, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 07/10/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00038 |
| Federal ID | WY00038 |
| More Info | State Dam Safety Program |