Summer of 2018
The City of Wilsonville approved a project to replace a 40-year-old corrugated metal outfall pipe and install a new diffuser at the Wastewater Treatment Plant. AUS was subcontracted to perform the underwater installation of the outfall. AUS removed the old intake, managed the excavation of the new trench, installed the new pipe and outfall diffuser sections, and backfilled the trench.
The project increased wastewater treatment capacity, while improving Willamette River water quality.
