The downloadable fact sheets below provide greater insight into the project and the measures we will take to protect the environment and human health as we build and operate the mine and associated processing facilities. You also can view more fact sheets at the Minnesota DNR website.

How will the project protect water quality?

See how groundwater and surface water will be managed and treated and how the project will meet Minnesota’s strict sulfate, mercury and other standards in the Water Quality Fact Sheet.

How might the project affect human health?

Read how the project will avoid creating pollution or potential adverse health effects in workers or the public in the Potential Human Health Effects Fact Sheet.

Does the project have financial stability?

Learn how the project will have bankruptcy-proof financial protections to ensure that all of our reclamation and cleanup obligations are met in the Financial Assurance Fact Sheet.

How will PolyMet ensure its tailings basin is safe?

Understand how the project will reuse and enhance the safety of an existing tailings basin. Find out how the seepage capture system will address water from new operations and even reverse water quality issues created by legacy mining operations at the site in the Tailings Basin Stability Fact Sheet.

What is the truth about long-term water treatment?

Learn how water modeling studies show that water leaving the project site even 500 years from now will meet water quality standards in the Long-Term Water Treatment Fact Sheet.

Will the company have significant mercury discharges?

Discover how mercury levels found in the water discharged from the site will be eight to nine times cleaner than rainwater that falls in the area, and two to three times cleaner than what is found in natural runoff in the watershed in the Mercury Fact Sheet.

How mined and recycled copper together meet growing demand

Copper is one of the world’s most used metals and its unique properties make it highly desirable for recycling over and over again. Learn how it is that an estimated two-thirds of the copper mined since 1990 is still in use and why copper mining is necessary to keep up with ever-growing domestic and global demand in the Copper Mining vs. Recycling Fact Sheet.