Animas River in CO. Water from gold mine that is a superfund site. EPA screwed up and broke the retaining wall releasing the water, an interesting and sad story. I went through that area in '06. Messed up now.
http://www.daily-times.com/four_cor...eclare-state-emergency-close-animas-river-san
http://www.daily-times.com/four_cor...eclare-state-emergency-close-animas-river-san