Metropolitan Council Environmental Services (MCES), operator of the metro-area wastewater collection and treatment system, plans to rehabilitate the aging regional sanitary sewer pipe along 2nd St N between 16th Avenue North and 8th Avenue North in Minneapolis (see project area map below). MCES identified several areas of deterioration and structural issues with the sewer pipe, which was originally installed in 1932.
Figure 1: Map of project area in Minneapolis along 2nd Street North, between 8th and 16th Avenues North
This work will include installing a temporary aboveground wastewater conveyance system from 16th Avenue North to 7th Avenue North, rehabilitating the sewer pipe and maintenance access structures between 15th Avenue North and 8th Avenue North, and cleaning and inspecting a section of sewer to prepare for a future rehabilitation project. between 8th Avenue North and 3rd Avenue North in Minneapolis.
Most of the rehabilitation work will use the cured-in-place pipe (CIPP) method which inserts a liner into the existing pipe structure to form a new pipe (see image below). This method minimizes aboveground impacts and reduces costs when compared to a full pipe replacement.
Figure 2: Lining being inserted into a sewer pipe
What to expect during construction
- Partial closures of 2nd Street North. Local access will be maintained, but there will be short-term driveway closures to install temporary pipes. Drivers should follow posted detour routes.
- Sidewalk and bike lane closures. Bicyclists and pedestrians should follow posted detour routes.
- Temporary parking restrictions along 2nd Street North.
- Dust, noise, odors, vibrations, equipment staging, and visual impacts in and around the work area.
Figure 3: Map of current closure area along 2nd Street, between 16th and 15th Avenues North, in July 2021.
What is a temporary conveyance system?
Aboveground temporary wastewater conveyance pipes will be installed to ensure that there are no disruptions to sewer service while crews rehabilitate the sewer pipe. These pipes will convey sewer flow around the work site during construction.
Some temporary conveyance pipes may be buried under driveways or roadways to maintain access and minimize disruption. Property owners will be notified in advance if this is necessary. Diesel pumps with noise dampening equipment (low noise) will run 24 hours a day, seven days a week as part of the temporary wastewater conveyance system.
Figure 3: Aboveground temporary conveyance pipes
Construction is currently anticipated to begin in the summer of 2021 and be completed in the fall of 2021, with final restoration to occur in late fall 2021.
Project Manager: Jeff Schwarz, Area Manager, Interceptor Engineering
Council's Authorized Representative: Kim Sanders, Principal Contract Administrator, Construction Services