This is almost half of the acid mine drainage generated each year.

FORBES: Fracking With Bad Water

More than 2, 000 miles of streams are polluted by mine drainage, and smallmouth bass in the lower region are suffering from increasing levels of disease, Swartz said.

WSJ: Susquehanna River commission wants gauge funding

They are encouraging drillers to use tainted coal mine water to hydraulically fracture gas wells in the Marcellus Shale formation, with the twin goals of diverting pollution from streams and rivers that now run orange with mine drainage and reducing the drillers' reliance on fresh sources of water.

WSJ: Pa. pushes drillers to frack with coal mine water

Contaminated water has been abstracted and treated from the mine since 1992 following an drainage burst which caused visible pollution from mine water coloured orange by the high iron content.

BBC: An archive picture of Wheal Jane