The bill proposes new regulations concerning nonferrous mining activities within the Rainy River headwaters watershed in Minnesota. It establishes a new section in the Minnesota Statutes, specifically section 93.435, which defines the Rainy River headwaters watershed and outlines specific prohibitions related to mining activities in this area. The definition clarifies the geographic scope of the watershed, referencing existing Minnesota Rules for identification.

Under the new provisions, individuals are prohibited from several activities within the watershed, including the aboveground disposal or storage of waste tailings and reactive waste rock from nonferrous metallic mineral mining, the use of heap leaching processes, and conducting nonferrous metallic mineral smelting. These prohibitions aim to protect the natural resources and environmental integrity of the Rainy River headwaters watershed. The regulations will take effect the day following the final enactment of the bill.