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Performance Coal Company
Performance Coal Company
Upper Big Branch Mine-South
Massey Energy Company
Mine ID: 46-08436

Fatal Underground Mine Explosion
April 5, 2010

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Reports

  • Fatal Accident Report Without Appendices (6.51 MB)

  • Fatal Accident Report (With Appendices - 70.67 mb)

  • Executive Summary

  • Investigative Report
    Portable Methane and Multi-Gas Detectors Recovered from a Mine Explosion at Performance Coal Company Upper Big Branch Mine-South (MSHA ID 46-08436) Montcoal (Raleigh County), WV
  • Summary of Investigation

  • Powerpoint Show (3.28 mb)
    Once the presentation begins, click on slide to advance to next slide.

  • PDF Version
  • Mine Accident Scenario Video

  • Watch Video
  • Download Video
    (To download, right click link and save file to your pc.
  • Appendices

  • Entire Set of Appendices (64.3 MB)

  • By Appendix

    • Appendix A - List of Deceased and Injured Miners

    • Appendix B - Map of the Mine

    • Appendix C - List of Massey's Corporate Structure and Employees

    • Appendix D - List of Personnel Who Exercised Their Fifth Amendment Rights

    • Appendix E - Mine Rescue Personnel and Teams Responding

    • Appendix F - UBB Boreholes

    • Appendix G - Accident Investigation Protocols

    • Appendix H - Post-Accident Mapping Team Map

    • Appendix I - PIL No. 110-V-8 Procedures for Copying Photographs

    • Appendix J - Mine Dust Results

    • Appendix K - Inspection History

    • Appendix L - Mine Map Showing Direction of Primary Forces and Mine Dust Sampling Areas

    • Appendix M - Seismic Events in Southern West Virginia

    • Appendix N - WVDEP Surface Blasting

    • Appendix O - Geochemistry of Natural Gas and Coalbed Methane

    • Appendix P - Reconstruction of Ventilation Map

    • Appendix Q - Petrographic Analyses

    • Appendix R - Water Supply System to the Longwall Shearer Dust Sprays

    • Appendix S - Sediment Analysis from Water Baskets and Spray Nozzels

    • Appendix T - Detailed Discussion of Elimination of Electrical Ignition Sources

    • Appendix U - Testing Results for All Equipment Tested at A&CC

    • Appendix U-1 - Executive Summary of Investigation of Remote Control Units

    • Appendix U-2 - Executive Summary of Investigation of Longwall Lighting System Components

    • Appendix U-3 - Executive Summary of Investigation of Electrohydraulic Shield Control Components

    • Appendix U-4 - Executive Summary of Investigation of Longwall Communication System Components

    • Appendix U-5 - Executive Summary of Investigation of Portable Methane and Multi-gas Detectors

    • Appendix U-6 - Executive Summary of the Investigation of Power Supply, Amplifier Battery, Tracking Tag, and Tag Reader Components Associated with Pyott-Boone Tracking Boss Tracker System and Minecom UHF Leaky Feeder System

    • Appendix U-7 - Executive Summary of Investigation of Koehler-Bright Star Model 5100 and 5200 Series Cap Lamps and Cap Lamp Components

    • Appendix U-8 - Executive Summary of the Investigation of Seven Power Air Purifying Respiratory (PAPR) Helmet Battery Assemblies and Pieces

    • Appendix U-9 - Executive Summary of Investigation of Low-Energy Non-Permissible Electrical Items (Watches and Calculators)

    • Appendix U-10 - Executive Summary of Investigation of Machine-Mounted Methane Monitors

    • Appendix U-11 - Executive Summary of Investigation of High-Energy Non-Permissible Electrical Items

    • Appendix U-12 - Executive Summary of Investigation of a Nelson-Kellerman Anemometer

    • Appendix U-13 - Executive Summary of Investigation of Portable Radios

    • Appendix U-14 - Executive Summary of Investigation of Pyott-Boone CO Monitors

    • Appendix U-15 - Executive Summary of Investigation of Programmable Logic Controller Components

    • Appendix V - Vaisala National Lightning Detection Report 258028

    • Appendix W - Mine Electrical System

    • Appendix X - Examination of Components of JOY Mining Machinery JNA Control System

    • Appendix Y - Executive Summary of Investigation of a Digital Video Recorder (DVR)

    • Appendix Z - Mine Map Showing Extent of Flame, Incombustible Content and Coke

    • Appendix AA - Results of Proximate Analysis Testing

    • Appendix AB - Rock Dust Crew Notebook

    • Appendix AC - Belt Examination Book (4/1/2010) - 4/5/2010)

    • Appendix AD - Belt Examination Book (3/16/2010 - 4/1/2010)

    • Appendix AE - Additional Information on UBB MMU's

    • Appendix AF - Methane and Dust Control - Safety Precautions from Ventilation Plan

    • Appendix AG - Specifications of Water Sprays

    • Appendix AH - Roof Control Plan - Headgate and Tailgate Support

    • Appendix AI - Stability Analysis of Gateroad Design

    • Appendix AJ - Operation of the Minecom UHF Leaky Feeder System, Pyott-Boone Tracking, and Pyott-Boone Carbon Monoxide Monitoring System

    • Appendix AK - Mine Emergency Evacuation

    • and Firefighting Plan
    • Appendix AL - Summary of Examination of Three Refuge Alternatives

    • Appendix AM - Examination and Testing of Self-Contained Selt-Rescuers (SCSRs)

    • Appendix AN - List of Personnel Assisting in the Investigation

    Review of MSHA's Actions at the Upper Big Branch Mine-South

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