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App. 11-13-6 <br /> NO. 4 PORTAL AREA <br /> Structures <br /> Office, lmphouse <br /> & hoist Concrete/metal 76x90 1969 <br /> Storage facilities <br /> Oil storage Metal shed 12x24 1969 <br /> Rock dust storage Steel bins 13x32 1970 <br /> Water storage Steel tank 14x30 1970 <br /> Electrical <br /> 7200 volt <br /> switchgear Metal shed 10x18 1969 <br /> NO. 5 PORTAL AREA <br /> Structures <br /> Lamphouse Concrete/cinderblock <br /> Metal roof 31 x71 1975 <br /> Ventilation <br /> Compressor house Cinderblock 15x15 1975 <br /> Fan house #11 <br /> Storage facilities <br /> Oil storage Concrete/ <br /> cinderblock 10x13 1975 <br /> Rock dust storage <br /> 100 Ton Steel bin 13x32 1975 <br /> Adit/Rock Tunnel Portal Area, <br /> Water storage Steel tank 13x25 1979 <br /> 4 <br />