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� t <br /> k � <br /> East Portal Fan Building, New Elk, March 2009 <br /> Offsite Support Facilities <br /> Technical Revision No. 50 is currently being reviewed by the Division. This revision <br /> proposes to open the two Apache Canyon shafts for intake air and open the West Portal fan <br /> shaft and possibly two portal slopes at the West Mine. The Apache Canyon shaft sites are <br /> currently sealed with concrete caps and vent standpipes. Power will not be necessary as the <br /> plan would be to install only steel grates for intake air. <br /> 'r .z <br /> Lower Apache vent site Upper Apache vent site <br /> 4 <br />