The Glacial Ridge National Wildlife Refuge was established in 2004 on land in northwestern Minnesota that had previously undergone extensive wetland and prairie restorations. About 7,000 acres of drained wetlands were restored to their original hydrologic
Cowdery, Timothy K. cowdery@usgs.gov,Brigham, Mark E. mbrigham@usgs.gov. Mercury in wetlands at the Glacial Ridge National Wildlife Refuge, northwestern Minnesota, 2007-9. 2013-01-01.