 And it's not just in Colorado. Researchers in Alaska have been seeing similar issues in waterways near thawing permafrost, the Arctic's so-called rusting rivers. Research chemist Amanda Barker is with the Army Corps of Engineers Cold Regions Research and Engineering Lab. Literally, the water looks orange. You're seeing impaired waterways that are just bright orange and that's oxidized iron. She says they don't know yet how widespread this problem is, but...