Report to Congress: Responses to Recommendations in the National Research Council's Report: Coal Waste Impoundments: Risks, Responses, and Alternatives [open pdf - 1MB]
"On October 11, 2000, an accident occurred in Martin County, Kentucky when over 300 million gallons of coal-waste slurry broke into an underground mine from the Big Branch Slurry Impoundment. Slurry flowed through and out of the mine and contaminated over 80 miles of creeks and rivers. This was the most notable of several incidents in recent years where slurry from coal-waste impoundments has broken into underground mine workings. These incidents have caused environmental damage, and have the potential to endanger persons working in the underground mines or living in the affected areas."
Lessons Learned Information Sharing (LLIS)