Pictures 25 Bald Mountain Gold Mill, Lead South Dakota Tweet 1992 PORTLAND HOISTHOUSE, TRAM SNOWSHED BEYOND COMPRESSOR WING LOOKING TOWARD MINE PORTAL. 1992 PORTLAND HOISTHOUSE, TRAM SNOWSHED OUTSIDE PORTAL WITH TWIN SIDE CABLE ROLLER. 1992 PORTLAND HOISTHOUSE, HOIST CABLE PULLEY AT NORTH SIDE OF SOUTH WYE LEG. 1992 PORTAL OF PORTLAND HOISTHOUSE. 1992 WINCH ALONG TRAMLINE NORTH OF DECORAH MINE, VIEW FROM SOUTH. 1992 MACHINERY FOUNDATION NORTH OF ORE BIN TRAM SPUR NORTH OF DECORAH MINE, VIEW FROM SOUTHEAST.