Overview
The Minnesota Department of Natural Resources is charged with preparing an EIS for the proposed Twin Metals Minnesota project (TMM project). This role is known as being the responsible governmental unit (RGU). The project proposer, TMM, is responsible for providing certain data and documents for the RGU’s use. Those proposer-provided documents are available on this page.
Proposer documents
Below are documents prepared by TMM to provide supporting data and analysis for the EIS. New documents will be posted on a routine basis.
IMPORTANT: These documents were not produced by the DNR or any other state agency. They are provided to inform interested parties of the data and analysis being provided by TMM for the EIS. These documents are posted as provided by TMM, and the DNR makes no claim on the accuracy of the content provided below. However, as RGU, the DNR will assess the accuracy and completeness of all information used in the EIS, including proposer-provided information. This is an ongoing activity.
- TMM data
- October 13, 2021 TMM Environmental Review Support Document Glossary 247 KB, 24 pages
- October 5, 2021 TMM Alternative Screening Evaluation Report 4,995 KB, 44 pages
- March 12, 2021 TMM Revised Project Proposal Description 66 MB, 429 pages
- March 12, 2021 TMM Responses to DNR-RGU Comments 0.7 MB, 172 pages
- December 18, 2020 TMM Revised Project Proposal Description 64 MB, 426 pages
- December 18, 2020 TMM Responses to DNR-RGU Comments 4.7 MB, 198 pages
- November 20, 2020 TMM Environmental Data Package Organization1 MB, 1 page
- November 20, 2020 TMM Annotated TOC Water Resources Volume 1 706 kb, 15 pages
- November 20, 2020 TMM Annotated TOC Water Resources Volume 2 762 kb, 14 pages
- November 20, 2020 TMM Annotated TOC Water Resources Volume 3 641 kb, 12 pages
- November 20, 2020 TMM Annotated TOC Multimedia Screening Assessment Volume 1 673 kb, 11 pages
- November 20, 2020 TMM Annotated TOC Multimedia Screening Assessment Volume 2 554 kb, 10 pages
- November 20, 2020 TMM Annotated TOC Air Quality Volume 1 634 kb, 11 pages
- November 20, 2020 TMM Annotated TOC Air Quality Volume 2 770 kb, 14 pages
- November 20, 2020 TMM Annotated TOC Air Quality Volume 3 788 kb, 15 pages
- November 20, 2020 TMM Annotated TOC Air Quality Volume 5 614 kb, 10 pages
- November 20, 2020 TMM Annotated TOC Wetlands and Riparian Resources Volume 1 729 kb, pages
- November 20, 2020 TMM Annotated TOC Wetlands and Riparian Resources Volume 2 659 kb, pages
- November 20, 2020 TMM Annotated TOC Wetlands and Riparian Resources Volume 3 641 kb, pages
- November 20, 2020 TMM Annotated TOC Biology Volume 1 799 kb, pages
- November 20, 2020 TMM Annotated TOC Biology Volume 2 667 kb, pages
- November 20, 2020 TMM Annotated TOC Biology Volume 3 699 kb, pages
- November 20, 2020 TMM Annotated TOC Socioeconomics and Environmental Justice Volume 1 688 kb, 14 pages
- November 20, 2020 TMM Annotated TOC Socioeconomics and Environmental Justice Volume 2 633 kb, 12 pages
- November 20, 2020 TMM Annotated TOC Socioeconomics and Environmental Justice Volume 3 677 kb, 14 pages
- November 20, 2020 TMM Annotated TOC Cultural Resources Volume 1 663 kb, 11 pages
- November 20, 2020 TMM Annotated TOC Cultural Resources Volume 2 616 kb, 10 pages
- November 20, 2020 TMM Annotated TOC Cultural Resources Volume 3 638 kb, 11 pages
- November 20, 2020 TMM Annotated TOC Visual Resources Volume 1 645 kb, 11 pages
- November 20, 2020 TMM Annotated TOC Visual Resources Volume 2 584 kb, 10 pages
- November 20, 2020 TMM Annotated TOC Visual Resources Volume 3 639 kb, 11 pages
- November 20, 2020 TMM Annotated TOC Noise and Vibration Volume 1 661 kb, 11 pages
- November 20, 2020 TMM Annotated TOC Noise and Vibration Volume 2 586 kb, 10 pages
- November 20, 2020 TMM Annotated TOC Noise and Vibration Volume 3 639 kb, 11 pages
- November 20, 2020 TMM Annotated TOC Geotechnical Volume 1 721 kb, 14 pages
- November 20, 2020 TMM Annotated TOC Geotechnical Volume 2 754 kb, 14 pages
- November 20, 2020 TMM Annotated TOC Geochemistry Volume 1 736 kb, 13 pages
- November 20, 2020 TMM Annotated TOC Geochemistry Volume 2 723 kb, 10 pages
- November 20, 2020 TMM Annotated TOC Cumulative Effects Volume 1 652 kb, 12 pages
- November 20, 2020 TMM Annotated TOC Cumulative Effects Volume 2 659 kb, 10 pages
- November 20, 2020 TMM Annotated TOC Cumulative Effects Volume 3 653 kb, 11 pages
- November 20, 2020 TMM Annotated TOC Hazardous Waste Resource Report 826 kb, 15 pages
- November 20, 2020 TMM Annotated TOC Geology, Mineral, and Soils Resource Report 780 kb, 15 pages
- November 20, 2020 TMM Annotated TOC Wilderness, Recreation, and Tourism Resource Report 788 kb, 16 pages
- November 20, 2020 TMM Annotated TOC Transportation Resource Report 721 kb, 14 pages
- November 20, 2020 TMM Annotated TOC Land Use Resource Report 730 kb, 15 pages
- October 12, 2020 TMM Baseline Data Catalog Memo 12 MB, 37 pages
- July 24, 2020 TMM Revised Project Proposal Description 126 MB, 422 pages
- July 24, 2020 TMM Responses to DNR-RGU Comments 1.4 MB, 117 pages
- December 18, 2019 TMM Project Proposal Description 3.9 MB, 296 pages
- December 18, 2019 TMM Project Proposal Figures 187 MB, 72 pages