Little Willow
Little Willow is an earth dam located in Goshen County, Wyoming, built in 1906. It carries a Low hazard potential classification and has a poor condition assessment.
About Little Willow
The primary purpose of Little Willow is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by 9h Angus Ranch (private). It impounds the Horse Creek Off Stream near Lyman, Nebraska.
The dam stands 10 feet tall and stretches 910 feet across, creates a reservoir covering 54 acres, and has a maximum storage capacity of 216 acre-feet. Completed in 1906, the structure is over a century 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 04/21/2022.
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Location
| State | Wyoming |
| County | Goshen |
| Nearest City | Lyman, Nebraska |
| River/Stream | Horse Creek Off Stream |
| Coordinates | 41.85920, -104.24770 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 910 ft |
| Year Completed | 1906 (120 years old) |
Storage & Hydraulics
| NID Storage | 216 acre-ft |
| Max Storage | 216 acre-ft |
| Normal Storage | 108 acre-ft |
| Surface Area | 54 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | 9H ANGUS RANCH |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 04/21/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00135 |
| Federal ID | WY00135 |
| More Info | State Dam Safety Program |