Colorado Geologic Survey Finds Acid Drainage Predates Mining

An award-winning study by the Colorado Geologic Survey has found that highly acidic surface water preceded mining activity by thousands, perhaps millions of years. The report was recently given an award by the Geological Society of America as the best environmental publication of 2011. It identifies a number of high-country streams in Colorado, including Red Mountain Creek, where surface water is acidic and has high concentrations of metals upstream of historic mining.