Alterations to local drainage pattern resulting from surface mining

Alterations to the local drainage pattern resulting from surface mining in Perry County in eastern Kentucky. Watersheds and stream channels derived from premining elevation data (NED) are on the left. Watersheds and stream channels derived from the postmining elevation data (SRTM) are on the right. The areas outlined in yellow indicate the portions of the original watersheds that contribute runoff to different streams as a result of the surface disturbance. The arrows indicate the new general direction of runoff. The area shown is about 6.6 km east-west by 5.4 km north-south.