Arsenic Contamination from Hard Rock Mining -- Whitewood Creek-Belle Fourche River, South Dakota

Mining wastes from the processing of gold ore were deposited in Whitewood Creek, South Dakota, for more than 100 years. About 100 million tons of finely ground gold-mill tailings, containing arsenic and other trace elements, mixed with natural sediments and were deposited in channels and flood plains downstream. This study, now concluded, characterized the downstream dispersal of contaminants through water movement, sediment transport, transfer of contaminants from sediments to water, and uptake of contaminants by aquatic organisms. Information gathered helped evaluate the long-term threat of the contaminants to the stream ecosystem and to downstream water supplies.

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USGS Information on Contamination from Mining Activities

• Understanding contaminants associated with mineral deposits: U.S. Geological Survey Fact Sheet 2007-3079
• USGS Arsenic Studies Group
• Solute Transport Involving Biological Processes in Surface Waters
• Coupled Transport and Geochemical Processes Determining the Fate of Chemicals in Surface Waters
• Chemical Modeling of Acid Waters
• Development of Mineral Environmental Assessment Methodologies
• Aqueous Geochemistry Research and Development
• Mine Waste Characterization
• U.S. Geological Survey Mine Drainage Interest Group (MDIG)

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