Thayne Lagoon Wastewater Treatment Plant - Thayne, Wyoming

Thayne Lagoon is a municipal wastewater treatment facility located in Thayne, Wyoming, a small town in Lincoln County. The plant serves a population of approximately 366 residents, reflecting its role in a rural, inland community. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant operates under the U.S. Clean Water Act framework, which requires secondary treatment for municipal wastewater. With a designed capacity of 548.88 thousand gallons per day and a current discharge volume of 302.83 thousand gallons per day, the facility operates below its capacity, indicating room for future growth. The treatment process is typical for small agglomerations in the United States, where EPA NPDES permits govern discharge limits. The treated effluent from Thayne Lagoon is discharged into the local watershed, which ultimately drains into the Salt River and then the Snake River system, part of the larger Columbia River Basin. This water body supports diverse aquatic life and is important for regional irrigation and recreation. The plant's operation helps protect downstream water quality in this ecologically sensitive area.

Thayne Lagoon discharges into the Salt River, a tributary of the Snake River, which flows into the Columbia River and eventually the Pacific Ocean. The local watershed supports cold-water fisheries and migratory birds, making water quality management critical for maintaining aquatic habitat and downstream uses such as agriculture and recreation.