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MINE DRAINAGE <br /> / / m <br /> .vo <br /> do <br /> c <br /> r <br /> I i <br /> KOEHLER PORTAL ( CAVED ) <br /> g D <br /> Ir <br /> 1 N surmMOt OMD <br /> ► m : KOEHLER MINE SITE <br /> SCALE : 1 IN. : 40 FT, <br /> T SILVERTON.COLORADO <br />