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APPENDIX II-B-6 <br /> SURFACE BUILDINGS AND STRUCTURES <br /> NO. 1 PORTAL AREA <br /> PURPOSE TYPE SIZE BUILT. <br /> Structures <br /> Offices, lamphouse Cement/cinderblock 48x72 1957 <br /> Ventilation <br /> Fan house #1 Metal 16x16 1959 <br /> Fan house #2 Metal 10x27 1959 <br /> Fan house #12 Metal 22x50 1986 <br /> Methane Drainage & <br /> Compressor House Metal/cinderblock 32x70 1965/1975 <br /> Transportation <br /> Hoist house Cement 21x32 1962 <br /> Conveyor/portal to bin Beft 42"x120' <br /> Methane pipeline Steel 211x4" <br /> Storage Facilities <br /> Oil Storage Tanks 12x16 1962 <br /> Aggregate Storage <br /> 100 tons Steel bins 13x32 1970 <br /> Rock Dust Storage <br /> 100 tons Steel bins 13x32 1976 <br />