Public Comment Form

Commenting open: November 15, 2022 12:00AM CT - December 15, 2022 11:59PM CT.

Dem-Con Landfill Expansion - Environmental Assessment Worksheet


We invite you to comment on the draft Environmental Assessment Worksheet (EAW) for the proposed Dem Con landfill expansion.


Dem Con Companies is proposing a 241-acre expansion to its current demolition landfill in Louisville Township near the Minnesota River. The 241-acre expansion area is an active limestone quarry that is nearing completion and preparing for final reclamation activities and end-use development. The current landfill accepts industrial waste and construction/demolition debris, including manufacturing scraps, recycling residue, off-spec products, asbestos, contaminated soils, and water treatment and filtering sludges. 


The MPCA reviewed potential impacts on local geology, soils, groundwater, surface water, and other potential environmental impacts. Some key findings include:
  • The project area does not contain any surface waters, wetlands, or floodplains and is not in a wellhead protection area.
  • The depth of groundwater ranges from 2– 20 feet below the floor of the quarry. Impacts on groundwater from a landfill generally result from leachate production. Dem-Con has implemented several groundwater protection measures including a synthetic liner with leachate collection and multiple final cover layers to prevent the infiltration of precipitation.
  • Existing groundwater monitoring networks will be expanded to include the project area. Groundwater monitoring occurs on a quarterly basis.



The Environmental Assessment Worksheet (EAW) is not a decision and does not determine whether the project moves forward. It is an information-gathering document used to inform decision-makers including those issuing land use and environmental permits that are required for the project. The environmental review process provides an opportunity for public input during the public comment period.


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Your Comment

Thank you for providing feedback on this project. We value your comments and will use them to assess this project further. Please submit your comments and feedback before the end of the comment period.

If you want to submit a letter, you can upload the letter on this website or submit it via US Mail to the following address:

Minnesota Pollution Control Agency
c/o Charles Peterson
520 Lafayette Road North
St. Paul, MN 55155


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