About the MWMC


A History of Water Quality Improvement

Willamette River1950: Eugene and Springfield dispose of wastewater directly to the Willamette River.

1972: Clean Water Act passes, establishing new requirments for wastewater treatment.

1977: City officials decide a new regional treatment facility is needed to provide for the wastewater disposal needs of the growing region; MWMC is formed.

1979: Groundbreaking begins for the regional wastewater treatment facility.

Installation of East Bank Interceptor1984: New wastewater treatment facility comes online.

1989: Biosolids Management Facility begins operation.

1997: Complete the Water Pollution Control Facility Master Plan, which initiates the Facilities Planning Process.

Inside dewatering facility2000: Biosolids Dewatering Facility constructed.

2001: Wet Weather Flow Management Plan is developed.

2004: The Commission adopts the "Facilities Plan," a roadmap to meet the community's wastewater needs until the year 2025.

Planting poplars at Biocycle Farm2004: First phase of three phases of poplar trees is planted at the Biocycle Farm.

2006: Major construction begins at the treatment facility to deliver on "Facilities Plan" improvements.

2008: The clarifiers, where solids settle out of the wastewater, were expanded to ensure the treatment facility could handle severe wet weather flows, and to improve the treatment process.

2008: Three existing digesters, which treat solid by-products, were retrofitted with improved tank mixing technology.

2008-13: New liners of high-density polyethylene were installed in four lagoons.

2009: Aeration Basins are used to reduce organics in wastewater treatment.

2010: Several upgrades (covers, filters, and fans) were made to capture and treat even more odors at the facility. This is part of our Good Neighbor Policy.

2010: A conversion to a Sodium Hypochlorite system increased disinfection capacity from 175 million gallons per day (mgd) to 277 mgd to meet peak flow capacity requirements.

2010: Peak Flow Management introduced to increase facility capacity by routing wastewater through an alternative process configuration during high flows.

Influent Pumping and Headhworks Expansion prject complete2010: Completed influent pumping and headworks expansion project, allowing more flow to enter the plant during wet weather, high-flow events.

2013: Digester capacity improved with introduction of primary sludge thickening process.

2015: New access locations for inspection and maintenance of the piping system was added to the biosolids pipeline that connects the wastewater treatment facility to the Biosolids Management Facility.

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