. >> the water shed's watch dog, michelle shivley who monitors the runoff from the coal mines 1968. >> it's still discharging anywhere from 800 to 1,000 gallons per minute. we actually end up with acid mine drainage and it's filled with metals, iron, aluminum, manganese. >> where some saw toxic runoff, a civil engineer saw pigment. pigment for paint home grown in ohio and not imported from overseas factories. >> huge industry. we go through about a million metric tons a year in the united states. a lot of that is imported from china and we're hoping we can change that a little bit with this process. >> i always lose a graduate student or two. >> yeah, that's cold water. you can really see where the orange has settled on the bottom. when you look at the edge it looks very healthy but in the water, what happens. >> there should be lots of great fish here, all kinds of insects but those have all been killed because of it. >> nothing in here. >> yeah. >> so is this the entrance? >> that's it. yeah. so right here, six square miles of underground mine empties out right in this single spot.