Elkhorn
Elkhorn is an earth dam located in Sublette County, Wyoming, built in 1911. It carries a Low hazard potential classification and has a poor condition assessment.
About Elkhorn
The primary purpose of Elkhorn is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Little Sandy Grazing Assn. (private). It impounds the Little Sandy Creek near Farson.
The dam stands 15 feet tall and stretches 110 feet across, creates a reservoir covering 145 acres, has a maximum storage capacity of 2,073 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1911, 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 07/20/2022.
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Location
| State | Wyoming |
| County | Sublette |
| Nearest City | Farson |
| River/Stream | Little Sandy Creek |
| Coordinates | 42.62480, -109.12530 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 110 ft |
| Year Completed | 1911 (115 years old) |
Storage & Hydraulics
| NID Storage | 2,073 acre-ft |
| Max Storage | 2,073 acre-ft |
| Normal Storage | 1,450 acre-ft |
| Surface Area | 145 acres |
| Drainage Area | 8 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LITTLE SANDY GRAZING ASSN. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 07/20/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01237 |
| Federal ID | WY01237 |
| More Info | State Dam Safety Program |