Polymet Mine EIS

As part of a team led by Environmental Resources Management, AES completed ecological assessments and made recommendations for avoidance, minimization and mitigation as part of a joint state/federal Environmental Impact Statement (EIS) for the Northmet-Polymet copper-nickel mining project in northern Minnesota.

The team worked closely with the Minnesota DNR, who led the public process and agency review, and the U.S. Army Corps of Engineers who co-led the process due to its large potential wetland impacts.

AES ecologists reviewed and analyzed information prepared by the mining company. Ecologists also completed the EIS sections on vegetative cover types, fish and wildlife, endangered and threatened species and wetlands by means of a MDNR-recommended scientific approach to wildlife habitat assessment.

AES coordinated field assessments and data gathering and analysis with several agencies, including the MDNR, U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, and U.S. Forest Service.

The EIS was found to be adequate for issues related to the AES contribution, but was re-started due to questions about sulfide pollution of surface waters.

  • EIS Assessment + Reporting
  • Ecological Data Gathering + Review
  • Field Assessment + Agency Coordination

Northmet-Polymet Mine
Environmental Impact Statement
Northern Minnesota
2007-2008


appliedecoPolymet Mine EIS