CREDIT: Steven St. John for The Wall Street Journal
"ANIMAS"
A discolored rock sits above the water line in the Animas River on Tuesday, March 22, 2016. Six months after an EPA crew triggered a toxic spill at a Colorado gold mine, state and local officials downstream are scrambling to prepare for a new emergency as spring snow melt threatens to stir up lead and other contaminants in a river used for drinking water.