Cottage Grove Council deems Nelson Mine EIS adequate for permitting after heated public comment

COTTAGE GROVE, Minn. — The Cottage Grove City Council on Nov. 5 voted to deem the final environmental impact statement (EIS) for MRIs' proposed Nelson (Backwaters) Mine adequate for use by permitting agencies, after residents and conservation groups urged the council to reject the document and seek more study.

The council's action was procedural: the city, serving as the Responsible Government Unit (RGU), determined the EIS compiles potential impacts for agencies such as the Minnesota Department of Natural Resources (DNR) and the U.S. Army Corps of Engineers, but does not grant permits or allow mining to begin.

The decision followed a lengthy public-comment period in which residents, tribal representatives and regional environmental organizations warned that the EIS omits key analyses and understates legal constraints. The executive director of Friends of the Mississippi River, Whitney Clark, told the council the city's own shoreline mining ban applies to expansions and said, “It's illegal to approve an EIS with such serious factual inaccuracies.” Clark also said the city had not done adequate tribal consultation on burial mounds and cultural resources on Grey Cloud Island.

Resident Sue Chamberlain urged the council to reject the EIS as incomplete, citing missing analysis of underwater noise, predicted vibrations, berm impacts on river flow and the lack of financially secured reclamation plans. “This is the only EIS study, and it's very lacking,” Chamberlain said.

Mayor (presiding) and staff repeatedly emphasized the limited, informational role the city is required to perform under state EIS rules. The mayor told the audience the final EIS is intended to gather potential impacts and to inform decisions by permitting agencies, and that the council's action does not permit the project.

City staff further explained that federal review under the National Environmental Policy Act (NEPA) and permitting by the Army Corps and the DNR are separate steps; the city will likely not see final permitting applications until those agencies complete additional analyses.

Speakers representing conservation organizations and local residents warned that the project risks damage to wetlands, mussel beds and rare plants, will reduce backwater access for recreation, and could impose noise and light pollution on nearby neighborhoods for decades. Several speakers also urged greater outreach to Dakota tribal nations, noting Grey Cloud Island's historical significance and existing burial mounds.

The council approved the consent agenda, which included the EIS adequacy determination, by voice vote. The record in the meeting transcript shows the motion carried after a second; the vote was taken by voice and a roll-call tally was not recorded in the public minutes.

The city highlighted that the EIS document will be a reference for permitting agencies, and that those agencies are responsible for further technical analysis and mitigation requirements. The Minnesota Environmental Quality Board (EQB), the DNR, the U.S. Army Corps of Engineers and tribal nations were all cited in public comments and in staff remarks as parties with continuing authority and review responsibilities.

What happens next: The EIS adequacy determination moves the dossier forward to permitting agencies. Those agencies could require additional studies, conditions or mitigation during permitting; any subsequent permits would be subject to separate public notice and review processes.