The City of Duluth owns, operates, and maintains 53 wastewater pumping stations. Included in this number are five storage facilities with 14 million gallons of storage capacity. The function of these pumping stations is the conveyance of wastewater from our customers to the Western Lake Superior Sanitary District treatment facility located at 2626 Courtland Street. City infrastructure also includes approximately 400 miles of collection sewers.
The Sanitary Sewer Utility staff provides a variety of services including:
- Regular cleaning of sewer lines
- Responding to emergency and routine customer calls
- Repair of damaged infrastructure
- Improvements to existing structure
- Maintenance of lift station (pumping station) operations
- Televising of sewer lines to identify problems
- Televising to inspect new construction
- Inspections of sewer construction
- Assistance to the public and other agencies with sewer related problems
The Duluth Sanitary Sewer Collection System has the capacity to contain a specified volume of wastewater within the system. The capacity is more than enough to handle dry weather flow. However, wet weather and snowmelt may cause excess water to enter the sanitary collection system though leaks or illegal connections, roof drain connections or footing drains. This excess water, in turn, causes the system to exceed level of service at certain locations.
Overflows may occur during extreme wet weather events when clean water enters the system (this is called “inflow and infiltration” of the system). The clear water from storms finds its way into the system through old connections to roof and footing drains, broken or cracked lateral piping from homes and businesses, defects in the infrastructure or through illicit connections. Other overflows occur as the result of pipe breakages or blockages during dry weather. In order to eliminate the problem, these situations must be minimized.
Inflow & Infiltration
The City of Duluth removes inflow and infiltration (I/I) from the sanitary sewer collection system by conducting an inspection program to identify contributions of I/I on private property. Properties that are contributing I/I are offered grants of up to $2,150 to assist in funding corrective work to remove I/I. Details of this grant program can be found below.
If you have sump pump, I/I, or other sanitary sewer questions or issues, please contact the Utility Operations office at 218-730-4130.