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Shaft Collar /Closure Design: <br />Steel beams (W8x 17 typ.) shall be cut into existing rock and grouted <br />in place. Steel diamond plating shall be welded over the shaft <br />opening. A hinged, lockable steel bar grating door (2'x2') shall be <br />installed for access. Concrete shall be placed between the beams and <br />the shaft opening to fill irregular voids. This concrete shall be <br />reinforced pursuant to the the General Bid Specifications - Colorado <br />Inactive Mine Reclamation Program guide. <br />Scale: 1/2" = 1' <br />0 <br />V <br />o c <br />CE <br />c� <br />Cc <br />0 <br />►� <br />€ <br />�y <br />L � <br />o� -f <br />1� l ^* <br />I .. <br />M <br />a� <br />(r'�J <br />e <br />� N <br />� <br />•� <br />N <br />;L4 <br />4 <br />�v <br />y <br />G <br />�'Jw1 <br />' <br />.PA <br />OW <br />W� <br />I <br />c c. <br />4.? <br />o <br />a� <br />V� <br />V � <br />O y <br />4� <br />� w <br />E <br />1 <br />A <br />�N <br />o� <br />V F" <br />0. <br />v <br />� � o <br />►�I <br />CE <br />c� <br />Cc <br />0 <br />►� <br />€ <br />�y <br />C <br />V <br />a� <br />o rn <br />� N <br />� <br />•� <br />N <br />y <br />N <br />� <br />' <br />.PA <br />•POO <br />E <br />1 <br />A <br />�N <br />o� <br />V F" <br />0. <br />v <br />� � o <br />CE <br />c� <br />Cc <br />0 <br />►� <br />€ <br />C <br />V <br />o rn <br />� N <br />J <br />