Smiley Reservoir is an earth dam located in Carbon County, Wyoming, built in 2000. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 47 ft47 ft tall and 424 ft long, taller than 91% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Smiley Reservoir
The primary purpose of Smiley Reservoir is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Little Snake River Conservation District (private). It impounds the North Fork Cherokee Creek near County Road.
The dam stands 47 feet tall and stretches 424 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 132 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 2000, the structure is 26 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 06/11/2025.
At 47 feet, this dam is taller than 91% of dams nationwide.
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Location
| State | Wyoming |
| County | Carbon |
| Nearest City | County Road |
| River/Stream | North Fork Cherokee Creek |
| Coordinates | 41.24590, -107.50630 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 47 ft |
| Dam Height | 47 ft |
| Dam Length | 424 ft |
| Year Completed | 2000 (26 years old) |
Storage & Hydraulics
| NID Storage | 132 acre-ft |
| Max Storage | 132 acre-ft |
| Normal Storage | 78 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 3 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Little Snake River Conservation District |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/11/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02277 |
| Federal ID | WY02277 |
| More Info | State Dam Safety Program |