Check out the photos from the Peru Creek Basin and Snake River from the Summit Daily News. From the article:
Currently, a group of researchers with the U.S. Geological Survey, the U.S. Environmental Protection Agency and the Colorado Department of Public Health and Environment is experimenting with traceable dyes to pinpoint the path of the pollution. The work could help establish the best options for cleaning up Peru Creek and the Snake River. Options include diverting clean water flowing into the mine, moving piles of waste rock away from the water and, ultimately, direct treatment of polluted water flowing out of the mine.