Project Update - March 19, 2019. See Project Updates below.
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Metropolitan Council Environmental Services (MCES), operator of the metro-area wastewater collection and treatment system, will be inspecting the regional sanitary sewer pipes between Chaska and Shakopee. The pipes were originally constructed in the 1990s and have a variation of elevation changes and curves, lending to potential build-up of gases and deterioration.
Project Overview Handout (PDF)
How the Inspection Will be Done
The project will use SmartBall technology to inspect approximately 15,000 feet of pipes. Crews will insert a golf ball-sized sphere into the sewer pipes that will flow downstream and analyze the pipes with the use of an acoustic sensor to detect potential pipe deterioration. The ball will be inserted near the new lift station (L71) near 2nd St. and Beech St. in Chaska and will flow downstream to its retrieval point by Marystown Rd. and Hwy. 169 in Shakopee.
Project Map (PDF)
SmartBall Technology Infographic (PDF)
The testing will occur over the course of approximately a week. The testing will require additional water to be added to the pipes, so that the SmartBall can flow through properly. A floating dock and pump will be set up on the Minnesota River in Chaska, with temporary aboveground pipes connected to the existing pipe by the lift station to add water during testing. MCES has been working with all appropriate regulatory agencies to coordinate the water pumping in advance.
- Minor reconstruction of a service road along the Minnesota River
- Cleaning debris from the pipes, particularly near Marystown Rd. and Hwy. 169 in Shakopee
What to Expect
- Equipment set up by the Minnesota River and new lift station in southeast Chaska, and along Hwy. 169 near Marystown Rd. in Shakopee
- 24-hour pumping from the Minnesota River during pipe inspection
- Short-term impacts to the trail along the north side of the Minnesota River in Chaska
- General noise, vibrations and odors associated with wastewater pipe access and cleaning
The overall project (including set up, testing, pipe cleaning, service road restoration and site clean-up) is expected to occur between December 2018 and spring 2019.