Overview
Lodge Grass Town of Lagoon is a secondary wastewater treatment plant in Big Horn County, Montana, serving 510 people. It discharges 45.43 million gallons per year and has a designed capacity of 71.92 million gallons.
Lodge Grass Town of Lagoon is a municipal wastewater treatment facility located in Big Horn County, Montana, United States. The plant serves a small population of 510 residents and operates with secondary treatment, which is the standard for communities of this size under the U.S. Clean Water Act. The plant has a designed capacity of 71.92 million gallons and reports an annual discharge volume of 45.43 million gallons. As a secondary treatment facility, it uses biological processes to remove organic matter and suspended solids, meeting the national effluent guidelines for small publicly owned treatment works. The treated effluent is discharged into a local water body that ultimately drains into the Yellowstone River basin, a major tributary of the Missouri River. This watershed supports diverse aquatic life and is an important resource for agriculture and recreation in southeastern Montana.
Environmental context
The plant's discharge enters a tributary of the Yellowstone River, which flows through Montana and Wyoming before joining the Missouri River. The Yellowstone River basin is ecologically significant, supporting native fish species such as Yellowstone cutthroat trout and providing habitat for migratory birds. The region's semi-arid climate makes water quality management critical for downstream uses including irrigation and livestock watering.
Frequently asked questions
The plant is located in Big Horn County, Montana, United States, near the town of Lodge Grass.
The plant serves a population of 510 people, typical of a small rural community in Montana.
The plant uses secondary treatment to clean wastewater before discharging it into a local water body that flows into the Yellowstone River basin.
As a U.S. facility, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Montana Department of Environmental Quality.
Small plants like this typically use secondary treatment, often with lagoon or activated sludge systems, to meet EPA effluent guidelines for biochemical oxygen demand and total suspended solids.
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