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U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 51) Blast Furnace No. 4 140 Stockhouse 140 Hoist House 141 Furnace Top 14 3 Blast Furnace No. 6 144 Stockhouse 144 STEELMAKING PLANT Bessemer Converter House 159 Open Hearth Steelmaking System. 164 Open Hearth No. 2 Mixer Building 164 Open Hearth No. 2 Stock Yard 164 Open Hearth No. 2 Furnace Building 164 Open Hearth No. 2 Mould Preparation Building..165 Open Hearth Office Building. 165 Electric Furnace Steelmaking System. 171 Electric Furnace Building and Lean-to 171 Stock House Aisle , 171 Charging Aisle. 172 Pouring Aisle 173 Electric Furnace Office Building and Chemical Laboratory 174 Steel Conditioning Building 174 Steel Conditioning Office and Storage Building 175 Outdoor Electrical Sub-Station 175 Heat Treatment Plant 182 Heat Treatment Plant Building 182 Car Bottom Furnace No. 1 182 Car Bottom Furnace No. 6 182 Continuous Electric Heat Treating Line 182 Car Bottom Furnace No. 2 , 18 3 Car Bottom Furnace No. 3. .. 18 3 Car Bottom Furnace No. 4 18 3 Car Bottom Furnace No. 5.... 183 Continuous Gas-Fired Heat Treating Line.....183 Ajax Mangnethermic Induction Line 184 Finishing and Testing Equipment 184 Basic Oxygen Steelmaking System 190 Flux Handling Building, Trestle and Covered Conveyor 190 Mould Preparation Building 190 Hot Metal Shed 191 Basic Oxygen Process Building 191 Charging Aisle 191
U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 52) Furnace Aisle 192 Near Western Teeming Aisle 195 Far Western Teeming Aisle 196 Clean Steel Production Building 196 Gas Cleaning Facilities 197 Quenchers 197 Rough Gas Mains 197 Gas Quencher Pump House. 197 Gas Cooling Towers 198 Gas Washer Pump House 198 Fans and Stacks. 198 Water Treatment Facilities 199 Scupper 199 Rake Classifiers 199 Cooling Tower Slurry Pumps 199 Clarifier and Sludge Pumps 199 Filter Cake House and Sludge Dewatering Equipment .199 Acid Storage Tank 2 00 Neutralization Tank 200 Wet Well 200 Chemical Feed Pump House 2 00 Calcium Dispersant Tank 2 01 Gravity Filter Building 201 Cinder Yard 2 02 Remains of Slag Granulating and Separation Facilities 202 Standpipe 2 02 Slag Slurry Transfer Pump .202 Slag Separation Building. 202 Skull Cracker Enclosure 2 03 Electrical Sub-Station Building 203 STEELSHAPING - ROLLING MILLS Primary Rolling Systems 211 Remains of Primary Rolling Facilities at Upper Works 211 4 0-Inch Conditioning Yard.. .211 21-Inch Conditioning Yard 211 21-Inch Mill Steel Conditioning Office Building 212 21-Inch Mill Shippers and Inspectors Office Building 212 Roll Shop Conditioning Yard (Main Shop) 212 Primary Rolling Facilities at Lower Works 213 D.P.C. Conditioning Yard Building 213 D.P.C. Steel Conditioning Office and Storage Building. 214 Primary Mill Building 214
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dumped. Construction Date: 1957. U.
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B. Hoist House,: U.S. STEEL DUQUESN
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STEELMAKING PLANT - HEAT TREATMENT
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STEELMAKING PLANT - BASIC OXYGEN U.
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construction carbon and alloy steel
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