Stephenson
Stephenson is an earth dam located in Carbon County, Wyoming, built in 1909. It carries a Low hazard potential classification and has a poor condition assessment.
About Stephenson
The primary purpose of Stephenson is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Q Creek Land & Livestock Co, Llc (private). It impounds the Big Ditch Creek near Alcova.
The dam stands 9 feet tall and stretches 590 feet across, creates a reservoir covering 21 acres, and has a maximum storage capacity of 112 acre-feet. Completed in 1909, 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 04/22/2021.
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Location
| State | Wyoming |
| County | Carbon |
| Nearest City | Alcova |
| River/Stream | Big Ditch Creek |
| Coordinates | 41.86540, -106.60580 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 590 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 112 acre-ft |
| Max Storage | 112 acre-ft |
| Normal Storage | 78 acre-ft |
| Surface Area | 21 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Q CREEK LAND & LIVESTOCK CO, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 04/22/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00299 |
| Federal ID | WY00299 |
| More Info | State Dam Safety Program |