USH 12 Middleton Bypass | Middleton, WI

Lakewalk Sanitary Sewer Overflow Underground Storage Facility

Client: City of Duluth
Location: Duluth, MN


Buried beneath this environmentally-friendly parking lot is a three-million-gallon tank that protects Lake Superior from sanitary sewer overflows.

Buried beneath this environmentally-friendly parking lot is a three-million-gallon tank that protects Lake Superior from sanitary sewer overflows.

What was once an abandoned industrial property in the City of Duluth, Minnesota, has been transformed into a parking lot with a park-like setting located adjacent to the Duluth's popular pedestrian Lake Walk. Buried underneath an environmentally-friendly parking lot on the site is a massive 3-million-gallon tank. The recently completed Lakeside Interceptor Sanitary Sewer Overflow (SSO) Basin protects Lake Superior from sanitary sewer overflows while blending into the environment.

MSA designed the tank and parking lot, provided construction oversight and completed environmental investigation, planning and remediation. Project challenges included:
  • A tight, one-acre site
  • Fast-tracked schedule to meet U.S. Environmental Protection Agency requirements
  • Access to the Lake Walk 
  • Nearby residential property
  • Railroad tracks through the site
  • Safe removal of contaminated soil 

Services Provided

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