Water Toxins Near Mine a Colorado Controversy.sciencedaily.com. August 14, 2015. Source:AP / Powered by NewsLook.comSummary: Many Silverton, Colorado residents resisted having a Superfund toxic cleanup before an abandoned mine leaked millions of gallons of contaminated wastewater there. Some residents say toxic metals enter the water naturally. (Aug. 14) Video provided by APhttp://www.sciencedaily.com/videos/7fe46625055d4b1b89187486e54be164.htm