September 2019 — Wastewater treatment plant in Cottage Grove Minnesota.

September 2019 — Wastewater treatment plant with sedimentation tanks used to settle and remove solids from incoming water. Metal bridges and railings provide access for workers to maintain and inspect equipment. In the background, storage areas and treatment structures are surrounded by trees and fencing at the edge of the facility.

July 2017 — Marathon City Wastewater Treatment Plant