 Dr. Marc Betournay discussing mine issues in Canada 65 kb |
 John Duffy, Chairman of TRB Committee A2L05 giving opening the session 90 kb |
 John Duffy, Chairman of TRB Committee A2L05 giving opening the session 76 kb |
 View of those who attended the session 167 kb |
 View of those who attended the session 159 kb |
 Bob Henthorne discussing mine issues in Kansas 93 kb |
 Bob Henthorne discussing mine issues in Kansas 153 kb |
 Tom Lefchik discussing the Group on Abandoned Underground Mines 76 kb |
 Tom Lefchik discussing the Group on Abandoned Underground Mines 73 kb |
 Tom Lefchik discussing the Group on Abandoned Underground Mines 119 kb |
 Tom Lefchik discussing the Group on Abandoned Underground Mines 145 kb |
 Tim Newton discussing mine issues in Missouri 86 kb |
 Tim Newton discussing mine issues in Missouri 154 kb |
 Rick Ruegsegger introducing Bob Henthorne 140 kb
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 Rick Ruegsegger discussing mine issues in Ohio and the Ohio mine manual 90 kb |
 Rick Ruegsegger discussing mine issues in Ohio and the Ohio mine manual 70 kb |
 Rick Ruegsegger discussing mine issues in Ohio and the Ohio mine manual 135 kb |
 Rick Ruegsegger discussing mine issues in Ohio and the Ohio mine manual 143 kb |
 Dave Whitlatch discussing mine issues in Southwestern Pennsylvania 55 kb |
 Dave Whitlatch discussing mine issues in Southwestern Pennsylvania 80 kb |
 Dave Whitlatch discussing mine issues in Southwestern Pennsylvania 159 kb |
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