Fgd Effluent Pond #5

Fgd Effluent Pond #5 is an earth dam located in Lincoln County, Wyoming, built in 2018. It carries a Significant hazard potential classification and has a satisfactory condition assessment.

About Fgd Effluent Pond #5

The primary purpose of Fgd Effluent Pond #5 is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Pacificorp (private). It impounds the Dry Gulch near County Road 304.

The dam stands 58 feet tall and stretches 6,000 feet across, creates a reservoir covering 48 acres, and has a maximum storage capacity of 1,481 acre-feet. Completed in 2018, the structure is relatively new.

This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 08/18/2021.

At 58 feet, this dam is taller than 95% of all dams in the United States.

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Significant HazardSatisfactory ConditionEmergency Action Plan: Not Required

Location

StateWyoming
CountyLincoln
Nearest CityCounty Road 304
River/StreamDry Gulch
Coordinates41.74110, -110.59070

Physical Characteristics

Dam TypeEarth
NID Height58 ft
Dam Height58 ft
Dam Length6,000 ft
Year Completed2018 (8 years old)

Storage & Hydraulics

NID Storage1,481 acre-ft
Max Storage1,481 acre-ft
Normal Storage1,481 acre-ft
Surface Area48 acres

Ownership & Safety

PurposeTailings
OwnerPACIFICORP
Owner TypePrivate
Hazard ClassificationSignificant
Condition AssessmentSatisfactory
Last Inspection08/18/2021
Emergency Action PlanNot Required

Identifiers

NID IDWY02598
Federal IDWY02598
More InfoState Dam Safety Program

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