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Seneca Wastewater Treatment Plant

Located on the Minnesota River, the Seneca Plant is MCES's third largest facility. Built in 1972, the plant is the fourth largest in the state (after the Metro Plant, a facility in Duluth and Blue Lake). A $70 million expansion completed in 1992 increased the plant's capacity from 24 to 38 million gallons per day. The plant regularly earns state and national awards for operational excellence. In 2008, the Seneca Plant received an EPA Platinum Award for seven years of perfect compliance and National Association of Clean Water Agencies (NACWA) Peak Performance Award.

The Seneca Plant provides primary and secondary treatment to wastewater before discharging it to the Minnesota River. Dewatering and incineration are the methods used for disposal of the sludge generated during wastewater treatment. The resulting ash is landfilled in Rosemount, Minnesota.

Wastewater Treatment Plant Information

• Location: Eagan, Minnesota
• Type: Advanced secondary with chemical disinfection
• Capacity: 38 million gallons per day
• Discharges to: Minnesota River
• Communities served: 8
• Population served: 275,000
• Interceptors to plant: 46 miles

 

Read about the plant's energy conservation projects.

 

For more information about the plant, please contact Tim O'Donnell at 651-602-1269 or at tim.odonnell@metc.state.mn.us