"Researchers at the U.S. Bureau of Mines are conducting a long-term groundwater monitoring and site characterization program at an abondoned 10-hectare, acid-producing, copper-gold tailings impoundment in north-central Washington State. The purpose is to investigate contaminant release and transport, and attenuation mechanisms in the tailings, sediments below the tailings, and gravels downgradient of the impoundment. The report summarizes the monitoring results and physical properties of the tailings, the sediments below the tailings, and the groundwater system associated with the tailings." - NIOSHTIC-2 NIOSHTIC no. 10012563

National Institute for Occupational Safety and Health