NorthMet Mining and Land Exchange Final Environmental Impact Statement (Final EIS)

State and federal environmental review of the proposed PolyMet Mining Inc. project


A comprehensive environmental analysis of Minnesota’s first proposed copper-nickel mine has been released for public review. The Minnesota Department of Natural Resources is seeking public input on the adequacy on the Final EIS.

Review the Final EIS

Download complete Final EIS or individual chapters »

There are copies available for public review at several locations. Limited paper copy versions and CDs are also available.


NorthMet Mining and Land Exchange Final EIS - Errata PDF

The Minnesota Department of Natural Resources and its federal agency Co-leads have issued a short list of corrections (i.e., errata) for the Final EIS. The corrections are routine and minor in nature. They relate to references in the Final EIS and do not alter the analysis presented in the Final EIS in any way. One reference was incorrectly cited in the Final EIS and two reference documents were inadvertently left off the master reference list and were not included in the reference documents we distributed. The errata corrects the reference, updates the master reference list and includes the two reference documents. The citations and reference materials are part of how the Co-lead Agencies have substantiated their FEIS analysis. Thus we are providing the public with this short list of corrected information about the documents on which that analysis is based.

Comment on adequacy of Final EIS

Comments will be accepted until 4:30 p.m. (Central) on Monday, December 14, 2015.

Email comments

Submit comments to Email submissions should include a full name and legal mailing address.

Mail comments

Written comments may also be mailed to:

Lisa Fay, EIS Project Manager
DNR Division of Ecological and Water Resources
Environmental Review Unit
500 Lafayette Road, Box 25
St. Paul, MN 55155-4025

See Effective Commenting on the Final EIS PDF for additional details.


Partner links

U.S. Forest Service (USFS)
The Forest Service anticipates publishing a legal notice for its Draft Record of Decision (ROD) in the Duluth News Tribune of Duluth, Minnesota on Nov. 17, 2015. The Draft ROD will document that agency's draft decision on the land exchange. The legal notice and the Draft ROD will also be available on the Superior National Forest website on the legal notice publication date. The legal notice initiates a 45-day "objection" period pursuant to the regulations at 36 C.F.R. Part 218, Subparts A and B. Information about the objection process and how to submit objections will be included in the legal notice and the Draft ROD.

U.S. Army Corps of Engineers (USACE)
A Corps of Engineers public notice that announces the release of the Final EIS and changes to impacts to waters of the U.S. will be available on the Army Corps of Engineers, St. Paul District website Nov. 13.


EIS archives

Read about the 2009 Draft EIS and 2013 Supplemental Draft EIS.



The NorthMet Project would create an open pit copper, nickel, cobalt and precious metals mine with adjacent stockpile areas; refurbish a portion of the former LTV Steel Mining Company (LTVSMC) processing plant and construct a new hydrometallurgical facility at the plant site; construct a new tailings basin facility on the site of LTVSMC tailings facilities; and add to existing utility infrastructure and rail lines. The Land Exchange would consist of USFS conveyance of Superior National Forest Lands encompassing the NorthMet mine site and surrounding lands to PolyMet, and USFS acquisition from PolyMet of up to five tracts of private lands within the Superior National Forest proclamation boundary. 


map of sites


Fact Sheets

We've prepared the following Fact Sheets (downloadable PDFs) to assist you in the review of the Final EIS.


EIS Process Information

Final EIS Information