Maxey Flats, Kentucky
From 1963 through 1977 the Maxey Flats Nuclear Waste Facility operated here, closing when it was discovered that groundwater and runoff into tributaries of the Licking River were being contaminated. Other problems include heavy metals, volatile organic compounds, and pesticides. Maxey Flats became one of the largest, at 900 acres, federal Superfund cleanup sites. Cleanup and monitoring operations will be required for many decades to come at an estimated cost of at least $60 million.