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DEVELOPMENT <br />ODOO <br />Oo00 <br />nnnn <br />O~~p'O~OD0000o <br />RY~OQ ^ ^ <br /> <br />pouaaoaoopaaooaooDOaop ooDaaaaao0o <br />ouuu <br />oaaa <br />oooa <br />DDOp <br />MAIN Q Q <br />ENTRIES ~~ <br />OO OO <br />DODO <br />DDDD <br />0000 <br />C]000 <br />O OOD ODDOOOD OOOOOC~OC]OOOO <br />ooaooaD oooa <br />00000 <br />OO O ^ ROOM a PILLAR SECTION FIC <br />O ~ ~ DIRECTION OF r <br />PILLAR EXTRACTION 1 <br />•.~ .OOB~.' :~ :. ~. <br />.. .. •~ <br />TWENTYMILE COAL <br />COMPANY <br />TYPICAL MINE SECTION <br />