U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 157) Corporation, "Bell Cylinders Rope Diagram, Charging Equipment, Blast Furnace #4: Drawing #29647, August 27, 1958."; U.S. Steel Corporation, "Index, Working Diagram, Alterations for McKee Top, Blast Furnace No. 3: Drawing #26258, March 27, 1953."; U.S. Steel Corporation, "General Arrangement, 50" Diameter & 38" Diameter Bell Cylinder Piping & Operating Mechanism, Blast Furnace No. 3: Drawing #26066, January 27, 1953."; U.S. steel Corporation, "McKee Top & Bell Operating Mechanism, Blast Furnace No. 3: Drawing #2 6312, March 25, 1953."; Steve Chomanics, Blast Furnace Maintenance Foreman, interview with author, July 18, 1989;" Don Dvorsky, Mon Valley Works Energy Manager, interview with author, October 25, 1989." 10.United States Steel Corporation, "U. S. Steel - Mon Valley Works - Duquesne Plant, Property Inventory List," (Duquesne: 1984), 27-8, 40; "Novel Equipment Features U. S. Steel's New Duquesne Blast Furnace," Iron and Steel Engineer 4 0 (July 1963): 146-150; U.S. Steel Corporation, "General Arrangement, Cross Section Through Stockhouse Looking East, 28'- 0" Blast Furnace No. 6: Drawing #43002, March 30, 1962."; U.S. Steel Corporation, "Arrangement, Skip Car - 400 Cu. Ft. Capacity, 28 f -0" Blast Furnace No. 6: Drawing #43411, August 31, 1961."; U.S. Steel Corporation, "Plan, Skip Pit, 28 , -0" Blast Furnace No. 6: Drawing #43084, June 27, 1961."; U.S. Steel Corporation, "Stockhouse Arrangement, Plan of Operating Floor and Collecting Belts, 28'-0" Blast Furnace No. 6: Drawing #43031, February 19, 1961."; U.S. Steel Corporation, "No. 6 Blast Furnace, Stockhouse, Plan of Stockhouse, Duquesne Works: Drawing #57525, August 10, 1970."; U.S. Steel Corporation, "No. 6 Blast Furnace, Stockhouse, Existing Conveyor Systems, Flow Diagram: Drawing #65042, October 6, 1969."; U.S. Steel Corporation, "General Arrangement, Cross Section Through Furnace Looking North, 28*-0" Blast Furnace No. 6: Drawing #43000, March 5, 1962." 11.United States Steel Corporation, "General Arrangement 20" Belt Conveyor, Blast Furnace Stockyard: Drawing #35237, September 1, 1959."; U.S. Steel Corporation, "General Arrangement 24" Coke Breeze Belt Conveyor, Blast Furnace Stockyard: Drawing #35236, September 9, 1959."; U.S. Steel Corporation, "General Arrangement 24" Coke Breeze Conveyor, No. 4 Blast Furnace to No. 6 Blast Furnace Stockyard: Drawing #56647, December 11, 1968." 12.Steve Chomonics, Blast Furnace Maintenance Foreman, interview with author, July 18, 1989. 13.United States Steel Corporation, "U. S. Steel - Mon Valley Works - Duquesne Plant, Property Inventory List," (Duquesne: 1984), 37; "Buckets and Skips for Blast Furnaces," The. Iron Age 109 (June 8, 1922): 1595-1598.
U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 158) * All cited original drawings are in the possession of U.S.X. United States Steel Division, Engineering Office, Clairton PA.