Unit 3 Fgd Evaporation Pond 1 is an earth dam located in Lincoln County, Wyoming, built in 1990. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 40 ft40 ft tall and 5,348 ft long, taller than 86% of U.S. dams with a recorded height. 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 Unit 3 Fgd Evaporation Pond 1
The primary purpose of Unit 3 Fgd Evaporation Pond 1 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Pacificorp, Naughton Power Plant (public utility). It impounds the Shanks Creek near Hwy. 189.
The dam stands 40 feet tall and stretches 5,348 feet across, creates a reservoir covering 40 acres, and has a maximum storage capacity of 1,164 acre-feet. Completed in 1990, the structure is 36 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 06/06/2019.
At 40 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Wyoming |
| County | Lincoln |
| Nearest City | Hwy. 189 |
| River/Stream | Shanks Creek |
| Coordinates | 41.76500, -110.59722 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 5,348 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 1,164 acre-ft |
| Max Storage | 1,164 acre-ft |
| Normal Storage | 1,052 acre-ft |
| Surface Area | 40 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Pacificorp, Naughton Power Plant |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/06/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01643 |
| Federal ID | WY01643 |
| More Info | State Dam Safety Program |