Pictures 24 Bald Mountain Gold Mill, Lead South Dakota Tweet 1992 INTERIOR, PORTLAND HOISTHOUSE. COMPRESSOR WING INTERIOR FROM NORTHWEST. 1992 PORTLAND HOISTHOUSE, VIEW OF COMPRESSOR WING INTERIOR FROM SOUTH SHOWING COMPRESSOR AND TANK. 1992 PORTLAND HOISTHOUSE, COMPRESSOR WING INTERIOR WITH MACHINERY FOUNDATIONS ALONG NORTHWEST WALL FROM SOUTHWEST. 1992 PORTLAND HOISTHOUSE, COMPRESSOR WING INTERIOR WITH MACHINERY FOUNDATION ALONG NORTHEAST WALL FROM NORTHWEST. 1992 PORTLAND HOISTHOUSE, COMPRESSOR WING INTERIOR AT PARTS BINS. 1992 PORTLAND HOISTHOUSE, TRAM SNOWSHED OUTSIDE OF COMPRESSOR WIND LOOKING TOWARD MINE PORTAL.