In this video, an environmental technologist visits an abandoned coal mine in Kentucky to talk about how a remediation system (a series of settling ponds and treatment cells) is neutralizing the acid drainage from the mine and preventing damage to a creek downstream. He shows the path of the acid drainage as it flows down a hillside from the mine into a settling basin and on to treatment cells where limestone is used to raise the water's pH. At a higher pH, iron and other minerals drop out of solution, which means that these harmful precipitates stay in the settling basins rather than flowing into the creek.
This resource is part of the Water Solutions collection.
This video is available in both English and Spanish audio, along with corresponding closed captions.
Download video here: http://tdcms.ket.org/watersolutions/downloads/watsol00014.zip