Appalachian History Series – The Martin County Coal Slurry Spill of 2000
On the morning of October 11, 2000, Martin County, Kentucky, woke to one of the defining environmental disasters in Appalachian coalfield history. South of Inez, at the Big Branch Refuse Impoundment, coal slurry broke through into underground mine workings beneath the impoundment. The black waste traveled through the mine and came out through mine openings, entering Coldwater Fork, Rockcastle Creek, Wolf Creek, the Tug Fork, and the Big Sandy River system. Federal records differ slightly on the final volume, with EPA reports using about 250 million gallons, ATSDR using approximately 300 million gallons, and MSHA estimating 306 million gallons. The difference in numbers does not change the scale of what happened. A mountain hollow became the starting point for a disaster that affected streams, yards, water intakes, wildlife, and public trust far beyond Big Branch.
Big Branch Before the Breakthrough
The Big Branch Refuse Impoundment was part of Martin County Coal Corporation’s mining complex near Inez. MSHA described Martin County Coal Corporation as a wholly owned subsidiary of A.T. Massey Coal Company, Inc., of Richmond, Virginia. The preparation plant processed coal from underground and surface mines, and the solid waste from that process was stored at the Big Branch Refuse Impoundment in Big Branch Hollow. Before the breakthrough, MSHA reported that the impoundment contained 6,520 acre feet, or about 2.125 billion gallons, of water and slurry. Its pool covered about 68 acres and reached 221 feet at its deepest point.
Coal slurry is not simply muddy water. It is a mixture of water and fine coal refuse left over from washing coal. ATSDR described an impoundment as a holding pond for coal “fines” and wastes from the coal washing process. In Martin County, that waste sat above older mine workings, including the 1-C Mine in the Coalburg coal seam. The underground mine and the surface impoundment were connected not by design, but by geology, mining history, water pressure, and eventually failure.
The Morning the Slurry Moved
MSHA’s investigation placed the breakthrough in the early morning hours of Wednesday, October 11, 2000. A belt examiner had left the 1-C Mine only minutes before slurry broke through from the impoundment into the active mine workings. From there, the slurry breached sealed underground areas and exited through two drift openings, the South Mains Portal and the No. 2 North Portal. Some water also exited near the Big Branch Punch Out. Workers stopped the outflow by using dozers to push spoil material into the breakthrough area above the impoundment.
The physical disaster moved with the shape of the land. Slurry from one side entered the Wolf Creek drainage. Slurry from another entered Coldwater Fork of Rockcastle Creek. Those waters connected the local mine accident to the wider Big Sandy River system. EPA’s November 2000 pollution report said the material affected more than 75 miles of surface water downstream, including the Tug Fork and Levisa Fork of the Big Sandy River, a tributary of the Ohio River. ATSDR later concluded that more than 100 miles of streams and floodplains in and around Martin County were affected.
No miners were killed, and MSHA recorded no fatalities or personal injuries from the breakthrough and mine inundation. That fact matters, but it can also hide the extent of the damage. The absence of immediate deaths did not mean the absence of disaster. MSHA described extensive environmental damage in Wolf Creek, Coldwater Fork, and downstream areas. The National Research Council later wrote that the spill caused significant environmental damage and disrupted local water supplies, and that Congress requested a broader study of coal waste impoundments after the Martin County failure.
What MSHA Said Went Wrong
The MSHA investigation focused on the relationship between the impoundment, the underground mine, and the approved sealing plan meant to reduce the chance of another breakthrough. MSHA concluded that the failure occurred because Martin County Coal Corporation did not follow its approved Impoundment Sealing Plan of August 8, 1994, and a later modification from September 7, 1995. According to MSHA, the plan included provisions meant to reduce seepage from the impoundment into mine workings. MSHA found that failure to fully comply led to internal erosion, known as piping, between the impoundment and the mine.
In plain language, water found a path. As seepage moved through the material between the impoundment and the mine, it began carrying sand and weathered material into the mine opening. As that material washed away, a void formed and worked back toward the impoundment. The path widened until the remaining plug of material failed suddenly. At that point, the contents of the impoundment discharged into the mine and out into the creeks. MSHA also stated that it found no evidence that unusual weather or seismic activity triggered the breakthrough.
MSHA’s report emphasized the seepage barrier. The approved plan called for fine refuse slurry to be periodically directed along the barrier so that settled fine refuse would reduce seepage through the barrier. MSHA concluded that the redirecting of the fine refuse slurry was not performed, leaving water against highly permeable shot sandstone at the breakthrough location. In MSHA’s view, that made the seepage barrier more permeable than intended and allowed flow into the 1-C Mine.
Creeks, Fish, and Floodplains
The spill changed the streams first. ATSDR reported that slurry caused streams to overflow and flood valleys and floodplains around them. Slurry material was deposited as sediment on stream banks and in floodplain areas, including residential yards. ATSDR stated that slurry deposits directly affected approximately 30 residences in the Inez area, and that yards were either cleaned out or covered with topsoil as part of the response.
The fish kill became one of the clearest ecological measures of the disaster. A study by Kevin J. Frey, Daniel P. Michaelson, and Wayne L. Davis reported that Kentucky and West Virginia personnel assessed Coldwater Fork, Panther Fork, Wolf Creek, and the Tug Fork River after the spill. They concluded that there was a total fish kill in 92.8 kilometers of stream. The study estimated that 1,657,503 fish, weighing 83,199.04 kilograms, were killed, with Kentucky and West Virginia losses totaling $563,927.56 for the fish kill and investigative manpower.
Those numbers make the disaster easier to measure, but they do not fully describe how people experienced it. For residents, the spill was not only an environmental event somewhere downstream. It was in creek beds, yards, water systems, roadsides, and the memory of a community already shaped by coal. The landscape of Martin County made the disaster intimate. In narrow Appalachian valleys, creeks often run near roads, homes, gardens, churches, and schools. When the streams filled with slurry, the disaster moved through places people used every day.
Cleanup and Federal Orders
EPA responded along with Kentucky officials after the spill. In its Administrative Order on Consent, EPA stated that the release entered Wolf Creek, Rockcastle Creek, the Big Sandy River watersheds, Coldwater Fork, the Tug Fork, and the Big Sandy River. EPA also found that several potable and industrial water supply intakes were affected or potentially affected. Martin County Coal Corporation was required to remove waste materials discharged into waters of the United States and associated watershed areas, restore impacted waters and watersheds, mitigate temporary or permanent losses, and reimburse EPA response costs.
By January 10, 2001, EPA stated that company cleanup activities had removed waste material deposits from about eight miles of streambed, banks, and floodplain in the Coldwater Fork watershed and about five miles in the Wolf Creek watershed. ATSDR later reported that most slurry material had been removed from Coldwater Fork and the first five miles of Wolf Creek within one year. Cleanup involved long boom excavators, dredges, vacuum trucks, tractor pumps, pumping systems, and floodplain excavation.
Cleanup did not erase the public questions. ATSDR became involved after a citizens group in Inez petitioned the agency in April 2001 to evaluate environmental data and address community health concerns. Residents asked about skin rashes, nausea, headaches, drinking and showering in public water, vegetables grown in floodplains, and recurring blackwater events near the municipal water intake. ATSDR concluded that some exposure may have occurred, but that exposures were not at levels expected to cause adverse health effects, and classified the site as posing no apparent public health hazard. That conclusion belongs in the record, but so do the concerns that led residents to ask for the review in the first place.
The Legal Aftermath
The legal record after the spill is complicated. EPA’s order treated the discharge as a Clean Water Act matter and required cleanup, restoration, mitigation, and reimbursement. MSHA’s technical investigation placed responsibility on Martin County Coal Corporation’s failure to follow the approved impoundment sealing plan. But a later Federal Mine Safety and Health Review Commission administrative law judge reached a narrower legal conclusion about two contested MSHA enforcement actions. In 2007, the judge found that the Secretary of Labor had not proven the alleged violations and vacated the citation and order.
That distinction matters. MSHA’s accident report remains the federal technical account of what the agency believed caused the failure. The 2007 FMSHRC decision addressed whether the Secretary proved specific Mine Act violations tied to the approved plan. The two records should be read together rather than treated as if one erases the other. One explains the engineering theory of failure. The other shows how difficult it could be to convert that theory into sustained enforcement findings years later.
Civil claims also followed. A 2003 Associated Press report said hundreds of eastern Kentucky residents whose property was damaged by the spill settled a lawsuit against the operators of the coal company. The same report stated that Massey officials said they had spent $46 million on cleanup and that the company had agreed in 2002 to pay $3.25 million in penalties and damages to the state of Kentucky.
Why the Spill Still Matters
The Martin County Coal Slurry Spill is part of a longer Appalachian story about extraction, regulation, water, and trust. It happened in a place where coal was not an abstract industry. Coal meant work, tax revenue, land disturbance, company power, family income, and public risk. The spill showed how the hidden geography of old mine works could reach into the present. A failure below a coal waste impoundment became a disaster in living rooms, gardens, creeks, schools, water systems, and court records.
The spill also became a case study for engineers, regulators, and scholars. The National Research Council’s 2002 report examined coal waste impoundment risks, responses, mine map accuracy, monitoring, and alternatives for coal slurry disposal and use after Congress requested study of the issue. Later academic work examined public trust and risk perception in Martin County, with researchers finding that the disaster had long-term effects on trust in government, corporations, and experts.
For Appalachian history, the Martin County spill belongs beside mine explosions, labor conflicts, floods, dam failures, and water crises because it shows how industrial systems can shape daily life long after the first event ends. The disaster did not become history when the slurry stopped moving. It remained in agency reports, lawsuits, stream studies, public meetings, health consultations, and local memory. It is a story of one impoundment in one county, but also a story about the cost of storing coal waste above mined ground in the steep watersheds of Appalachia.
Sources & Further Reading
U.S. Department of Labor, Mine Safety and Health Administration. “Report of Investigation: Surface Impoundment Facility Underground Coal Mine, Noninjury Impoundment Failure/Mine Inundation Accident, Big Branch Refuse Impoundment, Martin County Coal Corporation, Inez, Martin County, Kentucky, October 11, 2000.” 2001. https://arlweb.msha.gov/impoundments/martincounty/martincountytext.pdf
U.S. Department of Labor, Mine Safety and Health Administration. “Surface Impoundment Facility Underground Coal Mine Noninjury Impoundment Failure/Mine Inundation Accident, Big Branch Refuse Impoundment, Martin County Coal Corporation.” https://arlweb.msha.gov/impoundments/martincounty/martincounty.htm
U.S. Environmental Protection Agency. “Region 4 Virtual Reading Room: Martin County Coal Corp., Inez, Kentucky.” Last updated August 15, 2025. https://www.epa.gov/foia/region-4-virtual-reading-room-martin-county-coal-corp-inez-kentucky
U.S. Environmental Protection Agency. “POLREP Number 9: Martin County Coal Corp. Coal Slurry Release, Inez, Kentucky, November 6, 2000.” 2000. https://www.epa.gov/foia/polreps-november-6-2000
U.S. Environmental Protection Agency. “POLREP Number 23: Martin County Coal Corp. Coal Slurry Release Multi-Regional Emergency Response Event.” December 21, 2000. https://www.epa.gov/foia/polrep-number-23-martin-county-coal-corp-coal-slurry-release-multi-regional-emergency-response
U.S. Environmental Protection Agency. “EPA Issues Administrative Order to Martin County Coal Corporation for Alleged Violations of the Clean Water Act.” March 7, 2001. https://archive.epa.gov/epapages/newsroom_archive/newsreleases/e9a5be43cccf076a8525734500711500.html
U.S. Environmental Protection Agency. “EPA to Hold Public Meeting Regarding the Martin County Coal Corporation Slurry Spill.” March 12, 2001. https://archive.epa.gov/epapages/newsroom_archive/newsreleases/e646c46e2b4bb13d852573450070aae5.html
U.S. Environmental Protection Agency. “Martin County Coal Corp. Coal Slurry Release, Coversheet & Table of Contents.” April 6, 2001. https://www.epa.gov/foia/martin-county-coal-corp-coal-slurry-release-coversheet-table-contents
U.S. Environmental Protection Agency. “Martin County Coal Corp. Coal Slurry Release, Section 1: Introduction.” April 6, 2001. https://www.epa.gov/foia/martin-county-coal-corp-coal-slurry-release-section-1-introduction
U.S. Environmental Protection Agency. “Martin County Coal Corp. Coal Slurry Release, Section 2: Site Description.” April 6, 2001. https://www.epa.gov/foia/martin-county-coal-corp-coal-slurry-release-section-2-site-description
U.S. Environmental Protection Agency. “Martin County Coal Corp. Coal Slurry Release, Section 4: Removal and Assessment Activities.” April 6, 2001. https://www.epa.gov/foia/martin-county-coal-corp-coal-slurry-release-section-4-removal-and-assessment-activities
U.S. Environmental Protection Agency. “Administrative Order on Consent, Martin County Coal Corporation.” 2001. https://www.epa.gov/sites/default/files/2014-03/documents/martin_county_coal_89.pdf
Agency for Toxic Substances and Disease Registry. “Health Consultation: Martin County Coal Slurry Release, Inez, Martin County, Kentucky.” August 7, 2006. https://www.atsdr.cdc.gov/hac/pha/MartinCountyCoalSlurryRelease/MartinCountyCoalSlurryHC080706.pdf
Federal Mine Safety and Health Review Commission. “Martin County Coal Corporation, November 13, 2007.” 2007. https://fmshrc.gov/sites/default/files/decisions/alj/kt2002-42x.pdf
National Research Council. Coal Waste Impoundments: Risks, Responses, and Alternatives. Washington, DC: National Academies Press, 2002. https://www.nationalacademies.org/publications/10212
U.S. Geological Survey. “Coal Waste Impoundments: Risks, Responses and Alternatives.” 2002. https://pubs.usgs.gov/publication/70227067
Frey, Kevin J., Daniel P. Michaelson, and Wayne L. Davis. “Impacts of the Martin County Coal Slurry Spill on Fishery Resources in Eastern Kentucky Streams: A Case Study.” Proceedings of the Annual Conference Southeastern Association of Fish and Wildlife Agencies 55, 2001. https://seafwa.org/sites/default/files/journal-articles/Frey-95-104.pdf
Scott, Shaunna L., Stephanie McSpirit, Sharon Hardesty, and Robert Welch. “Post Disaster Interviews with Martin County Citizens: ‘Gray Clouds’ of Blame and Distrust.” Journal of Appalachian Studies 11, nos. 1/2, 2005. https://www.jstor.org/stable/41446652
McSpirit, Stephanie, Shaunna L. Scott, Sharon Hardesty, and Robert Welch. “EPA Actions in Post Disaster Martin County, Kentucky: An Analysis of Bureaucratic Slippage and Agency Recreancy.” Journal of Appalachian Studies 11, nos. 1/2, 2005. https://www.researchgate.net/publication/234752270_EPA_Actions_in_Post_Disaster_Martin_County_Kentucky_An_Analysis_of_Bureaucratic_Slippage_and_Agency_Recreancy
McSpirit, Stephanie, Shaunna Scott, Duane Gill, Sharon Hardesty, and Dennis Sims. “Risk Perceptions After a Coal Waste Impoundment Failure: A Survey Assessment.” Journal of Rural Social Sciences 22, no. 2, 2007. https://egrove.olemiss.edu/jrss/vol22/iss2/6/
Scott, Shaunna L., Stephanie McSpirit, Shannon K. McGinnis, and Robert Welch. “The Long-Term Effects of a Coal Waste Disaster on Social Trust in Appalachian Kentucky.” Organization & Environment 25, no. 4, 2012. https://www.jstor.org/stable/27068875
Thacker, Barry K. “Big Branch Slurry Impoundment Breakthrough: Why It Happened and Lessons Learned.” Association of State Dam Safety Officials. https://damsafety.org/content/big-branch-slurry-impoundment-breakthrough-why-it-happened-and-lessons-learned
Michael, Paul R. “Slurry into Underground Mines.” West Virginia Mine Drainage Task Force. https://wvmdtaskforce.com/wp-content/uploads/2016/01/13-michael-paper.pdf
Living on Earth. “Kentucky Coal Investigation.” February 13, 2004. https://loe.org/shows/segments.html?programID=04-P13-00007&segmentID=5
Union of Concerned Scientists. “Coal Slurry Spill Investigation Suppressed.” https://www.ucs.org/resources/attacks-on-science/coal-slurry-spill-investigation-suppressed
Public Employees for Environmental Responsibility. “Jack Spadaro Complaint to Inspector General Gordon S. Heddell.” April 11, 2001. https://peer.org/wp-content/uploads/attachments/09_9_12_Jack_Spadaro_complaint.pdf
Ohio Valley ReSource and Louisville Public Media. “Troubled Waters: A Coalfield County Loses Trust in Water and Government.” 2017. https://www.lpm.org/news/2017-10-18/troubled-waters-a-coalfield-county-loses-trust-in-water-and-government
Associated Press. “Settlement Reached in Suit Vs. Coal Co.” February 20, 2003. https://www.ourmidland.com/news/article/Settlement-Reached-in-Suit-Vs-Coal-Co-7073543.php
Food & Water Watch. “The Water Crisis in Martin County, Kentucky.” February 2018. https://foodandwaterwatch.org/wp-content/uploads/2021/03/ib_1802_martincntykywater-web5.pdf
Author Note: This story is difficult because it is not distant history for many families in eastern Kentucky. The Martin County spill reminds us that Appalachian history is also environmental history, water history, and the history of trust between mountain communities, industry, and government.