Pardon the audio quality in portions of this, but check out some eyewitness accounts of the aftermath of the TVA coal ash spill: Basically a slow response on the part of TVA (clip above) and the type of damage which has happened (see clip below). Clips were recorded by United Mountain Defense.
TVA Coal Ash Spill
2.6 Million Cubic Yards of Toxic Coal Ash Slurry Released in Tennessee Dike Burst
Massive Tennessee Toxic Ash Spill May Have Been Prevented by Fixes Rejected by TVA Officials
Arsenic Levels 300 Times Safe Limits in TVA Coal Spill Water, Independent Tests Show