(WLUK) -- A group opposed to a proposed mine in Upper Michigan is stepping up its campaign.
The River Alliance of Wisconsin has released three videos profiling Wisconsin residents who say they would be negatively affected by the Back 40 mine.
Those profiled say they are concerned about impacts to drinking water, aquatic life, property values and Menominee Tribe cultural sites. The site of the proposed gold and zinc mine is near the Menominee River, which is along the Wisconsin-Michigan border.
In April, Michigan regulators issued the third of four required permits for the mine, a National Pollutant Discharge Elimination System permit designed to safeguard the river. The state previously issued the mining and air permits for the project. Aquila Resources, the mine's owner, still needs a wetlands protection permit.