The U.S. Forest Service has denied Minnesota's request for the research from an aborted federal study about the impacts of copper mining on the Superior National Forest and its Boundary Waters Canoe Area Wilderness.
Department of Natural Resources (DNR) Commissioner Sarah Strommen requested the unreleased research in a letter last month to Bob Lueckel, regional head of the Forest Service in Milwaukee. Her agency needs the research, she wrote, because it is in charge of doing an in-depth environmental review of the copper-nickel mine plan that Twin Metals Minnesota has submitted.
Lueckel responded that the Forest Service study was never completed, reviewed or formally approved and so it won't give Minnesota the information.
"Not only are the incomplete data and documents deliberative pre-decision materials, but also reliance on potentially irrelevant and unreviewed data and analyses will only hinder our collective efforts to develop a sound environmental analysis of the current proposal," Lueckel wrote in his letter, dated April 13.

DNR assistant commissioner Jess Richards, who provided a copy of the letter, called the situation "complex."
"The DNR has not yet determined how we will respond to the USFS letter nor any implications their response may have to our review of the Twin Metals proposal," Richards said in an interview.
The DNR is early in the process of scoping out what the environmental impact statement will cover. Twin Metals submitted its formal plan for a $1 billion copper-nickel mine just outside the Boundary Waters in December.
The U.S. Forest Service and its umbrella agency, the U.S. Department of Agriculture, have defied multiple demands to release the study and its backup materials, including a request from U.S. Rep. Betty McCollum, D-Minn., chairwoman of a key funding subcommittee. It released 60 blacked-out pages to the Wilderness Society only after that organization sued.