Project Update - September 13, 2022: Project schedule updated. See Project Updates below.
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Metropolitan Council Environmental Services (MCES), operator of the metro-area wastewater collection and treatment system, is studying methods to reduce odor and corrosion associated with MCES sanitary sewer pipes that serve homes and businesses in the City of Shakopee, Minnesota.
MCES collects the City of Shakopee wastewater and conveys it to the MCES Blue Lake Wastewater Treatment Plant, where it cleans and discharges the treated water to the Minnesota River. Wastewater that leaves homes and businesses in the City of Shakopee ages as it travels through city and MCES sanitary sewers to the treatment plant. Biological and chemical reactions occur in “old” wastewater which can create odors. MCES is looking to improve the management of odor and corrosion in the MCES sanitary sewers that serve the Shakopee area.
For a number of years, MCES has injected Calcium Nitrate into their regional sewers that pass through Shakopee to control odors and corrosion. MCES will be testing a different chemical in their regional sewers that may prove to be better at controlling odors and corrosion. The chemical they will test as part of this study is Magnesium Hydroxide.
Figure 1: Map showing location of pipe in Shakopee along Highway 169 from Marystown Road to east of Mystic Lake Drive, where it turns north to the Blue Lake Wastewater Treatment Plant north of Highway 101.
Figure 2: Map showing location of generator in Chaska at MCES Lift Station L71 southeast of the Beech Street and East 2nd Street intersection.
MCES will conduct a fan test at 6100 County Road 101 East. A fan will be placed over an MCES sewer maintenance hole at that location to determine how much odorous air can be extracted at that location and treated.
Figure 3: Map showing fan test site location in Shakopee at 6100 County Road 101 East.
What to expect
While we do our best to minimize impacts during testing, some temporary inconveniences may occur as work takes place. These include:
Odor and noise levels will be temporary and within safe levels for health.
What you can do
To help minimize odors in your home or business during chemical testing, please fill all drains with water to help keep odors in the sanitary sewer system. Drains include laundry sinks, floor drains, toilets, and more.
Summer and Fall 2022
- The fan test was completed on May 10 and 11, 2022. The fan test was used to size equipment that could be used to reduce sewer odors.
- The MgOH pilot test was conducted from August 17 to August 31, 2022. Additional testing may be required and dates will be posted as they are identified.
For information on City of Shakopee odors in winter 2021-2022, please contact:
For information on all other MCES odors, please contact:
MCES Regional Dispatch: 651.602.4511
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