MPCA: PolyMet submits a 401 certification request for NorthMet project

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You are receiving this bulletin as a subscriber to the email notification list for the proposed PolyMet/NorthMet mining project. This list is hosted by the Department of Natural Resources but is used jointly by the Minnesota Pollution Control Agency and DNR.  If you are no longer interested in receiving these bulletins please use the links at the end to unsubscribe.

On August 2, Poly Met Mining, Inc. (PolyMet) submitted a 401 certification request to the Minnesota Pollution Control Agency (MPCA) for its proposed NorthMet project in northeastern Minnesota.

 The 401 certification request can be found at

401 certification requests include a description of:

  • the size and location of the aquatic resources, such as wetlands and streams, that will be excavated or filled
  • how aquatic resources near the project footprint might be negatively affected
  • a plan to replace lost aquatic resources; and
  • a plan to monitor nearby aquatic resources in case additional resources are lost and must be replaced.  

The information contained in these documents helps the MPCA determine which state and federal requirements apply. The MPCA will review the 401 certification request and evaluate the need to develop conditions for a 401 certification that ensures the project can meet applicable laws and requirements, such as water quality standards. During this process it is normal for MPCA technical staff to request additional information from the applicant.

Public input will be solicited if a draft 401 certification is developed. MPCA encourages public participation during the formal public notice and comment period when a draft certification is available for public review and comment. Additional information about the MPCA’s permitting processes for the PolyMet proposed project can be found on the MPCA’s webpage:

This is one of several applications PolyMet will be submitting to the MPCA and Department of Natural Resources (DNR). You can find information about other permits and approvals and receive updates from the MPCA and DNR at the state’s PolyMet web portal:

Subscribers to this email list will be notified of key steps in the permitting processes for PolyMet such as opportunities for public comment, as well as news of any other applications received by MPCA or DNR.