Wikimedi'Òc

BARGE ON THE MONONGAHELA RIVER SHOWS EFFECTS OF POLLUTION CAUSED BY AN OIL SPILL AT THE DUQUESNE WORKS OF THE UNITED... - NARA - 557235.jpg - US National Archives bot

U.S. Steel Duquesne Works, West bank of Monongahela River along State Route 837, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3- (sheet 7 of 10).tif - Fæ

U.S. Steel Duquesne Works, West bank of Monongahela River along State Route 837, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3- (sheet 1 of 10).tif - Fæ

U.S. Steel Duquesne Works, West bank of Monongahela River along State Route 837, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3- (sheet 2 of 10).tif - Fæ

U.S. Steel Duquesne Works, West bank of Monongahela River along State Route 837, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3- (sheet 9 of 10).tif - Fæ

U.S. Steel Duquesne Works, West bank of Monongahela River along State Route 837, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3- (sheet 8 of 10).tif - Fæ

U.S. Steel Duquesne Works, West bank of Monongahela River along State Route 837, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3- (sheet 4 of 10).tif - Fæ

U.S. Steel Duquesne Works, West bank of Monongahela River along State Route 837, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3- (sheet 3 of 10).tif - Fæ

VIEW OF DUQUESNE'S RAIL LINES AND BLAST FURNACE PLANT LOOKING NORTH. DOROTHY SIX IS THE CLOSEST FURNACE IN THE PHOTOGRAPH. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace HAER PA,2-DUQU,3A-3.tif - Fæ

GENERAL SOUTHEAST VIEW OF ORE BRIDGES AND BLAST FURNACES FROM ORE YARD. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3A-6.tif - Fæ

LOOKING NORTH AT ROTARY CAR DUMPER BUILDING. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3A-23.tif - Fæ

VIEW OF BLAST FURNACE BLEEDER STACK No. 5 LOOKING SOUTH. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3A-22.tif - Fæ

LOOKING NORTHWEST AT ORE YARD, ORE BRIDGES, AND STOCKING TRESTLE. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, HAER PA,2-DUQU,3A-27.tif - Fæ

NORTHERN VIEW OF ORE YARD WITH ORE BRIDGES IN THE BACKGROUND. BLAST FURNACES ALONG THE RIGHT SIDE. (Martin Stupich) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along HAER PA,2-DUQU,3A-26.tif - Fæ

VIEW OF PIER LEGS OF ORE BRIDGE No. 3 AND No. 4. THE CITY OF DUQUESNE IS IN THE BACKGROUND TO THE WEST. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along HAER PA,2-DUQU,3A-28.tif - Fæ

WESTWARD VIEW OF PIER LEGS OF ORE BRIDGE No. 3 and 4. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3A-29.tif - Fæ

DETAIL OF PIER LEG OF ORE BRIDGE No. 3 LOOKING NORTH. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3A-30.tif - Fæ

NORTHEAST VIEW OF BLOW ENGINE HOUSE No. 2 AND COLD BLAST AIR MANIFOLD. THE OUTDOOR ELECTRIC SUBSTATION IS IN THE FOREGROUND. (Martin Stupich) - U.S. Steel Duquesne Works, Blast HAER PA,2-DUQU,3A-34.tif - Fæ

NORTHWEST VIEW OF BLOW ENGINE HOUSE No. 2 AND COLD BLAST AIR MANIFOLD. (Martin Stupich) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3A-35.tif - Fæ

NORTHEAST VIEW OF BLOW ENGINE HOUSE No. 2 AND COLD BLAST AIR MINIFOLD. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3A-36.tif - Fæ

WESTWARD VIEW OF COKE BIN INSIDE OF THE SOUTH STOCKHOUSE FOR DOROTHY SIX BLAST FURNACE. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, HAER PA,2-DUQU,3A-71.tif - Fæ

LOOKING EAST INSIDE THE BLOWERS CONTROL ROOM FOR DOROTHY SIX BLAST FURNACE WITH SNORT WHEEL IN FOREGROUND ON RIGHT. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, HAER PA,2-DUQU,3A-73.tif - Fæ

INTERIOR VIEW OF THE WESTERN WALL OF THE BLOWERS CONTROL HOUSE FOR DOROTHY SIX BLAST FURNACE. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, HAER PA,2-DUQU,3A-72.tif - Fæ

VIEW OF CONTROL PANEL ON THE EASTERN SIDE OF THE EAST SERVICE BUILDING OF DOROTHY SIX BLAST FURNACE. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela HAER PA,2-DUQU,3A-75.tif - Fæ

VIEW OF CONTROL PANEL ON THE WESTERN SIDE OF THE EAST SERVICE BUILDING OF DOROTHY SIX BLAST FURNACE. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela HAER PA,2-DUQU,3A-74.tif - Fæ

VIEW OF THE LINDE 400 TONS PER DAY LOW PURITY OXYGEN MAKING PLANT IN THE LOW PURITY BULK OXYGEN BUILDING LOOKING NORTH. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, HAER PA,2-DUQU,3E-11.tif - Fæ

LOOKING NORTHEAST AT THE LINDE 400 TONS PER DAY LOW PURITY OXYGEN MAKING PLANT IN THE LOW PURITY BULK OXYGEN BUILDING. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along HAER PA,2-DUQU,3E-10.tif - Fæ

LOOKING WEST AT THE LINDE 400 TONS PER DAY LOW PURITY OXYGEN MAKING PLANT IN THE LOW PURITY BULK OXYGEN BUILDING. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along HAER PA,2-DUQU,3E-12.tif - Fæ

NORTHEASTERN VIEW OF ORIGINAL DEMAG AIR COMPRESSOR UNIT FOR THE LINDE 1000 TONS PER DAY HIGH PURITY OXYGEN MAKING PLANT. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, HAER PA,2-DUQU,3E-14.tif - Fæ

LOOKING WEST AT THE LINDE 400 TONS PER DAY LOW PURITY OXYGEN MAKING PLANT IN THE LOW PURITY BULK OXYGEN BUILDING. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along HAER PA,2-DUQU,3E-13.tif - Fæ

LOOKING SOUTHEAST AT THE LINDE 1000 TONS PER DAY HIGH PURITY OXYGEN MAKING PLANT SHOWING THE TWIN OXYGEN FRACTIONATING TOWERS. - U.S. Steel Duquesne Works, Fuel and Utilities HAER PA,2-DUQU,3E-16.tif - Fæ

NORTHWEST VIEW OF LINDE 1000 TONS PER DAY HIGH PURITY OXYGEN MAKING PLANT SHOWING FRACTIONATING TOWER, NITROGEN REGENERATORS, AND REVERSING HEAT EXCHANGERS. - U.S. Steel Duquesne HAER PA,2-DUQU,3E-17.tif - Fæ

GENERAL EASTERN VIEW OF LINDE 1000 TONS PER DAY HIGH PURITY OXYGEN MAKING PLANT SHOWING TWIN OXYGEN FRACTIONATING TOWER (ON RIGHT), VERMICULITE STORAGE TOWERS (ON LEFT FOREGROUND) HAER PA,2-DUQU,3E-15.tif - Fæ

CLOSE-UP OF NITROGEN REGENERATOR IN FOREGROUND AND VERMICULITE STORAGE TOWER FOR THE LINDE 1000 TONS PER DAY HIGH PURITY OXYGEN MAKING PLANT. - U.S. Steel Duquesne Works, Fuel and HAER PA,2-DUQU,3E-18.tif - Fæ

VIEW OF WORTHINGTON BASE LOAD OXYGEN COMPRESSOR IN THE HIGH PURITY OXYGEN BUILDING LOOKING NORTH. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, HAER PA,2-DUQU,3E-20.tif - Fæ

VIEW OF CLARK OXYGEN BOOSTER COMPRESSOR IN THE HIGH PURITY OXYGEN BUILDING LOOKING SOUTH. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3E-21.tif - Fæ

LOOKING SOUTH AT CLEAN BLAST FURNACE GAS PIPE LEADING INTO THE EASTERN WALL OF THE CENTRAL BOILER HOUSE. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela HAER PA,2-DUQU,3E-24.tif - Fæ

MAIN CONTROL PANEL IN THE HIGH PURITY OXYGEN BUILDING LOOKING WEST. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3E-22.tif - Fæ

GENERAL SOUTHEASTERN VIEW OF CENTRAL BOILER HOUSE. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3E-23.tif - Fæ

VIEW TO THE SOUTH OF INDUCED DRAFT FANS ON THE SIXTH FLOOR OF THE CENTRAL BOILER HOUSE. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3E-25.tif - Fæ

THE WESTERN FACADE OF THE MAIN RIVER PUMP HOUSE. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3E-26.tif - Fæ

LOOKING EAST AT THE MAIN RIVER PUMP HOUSE. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3E-27.tif - Fæ

NORTHWEST VIEW OF BOILER FEEDWATER CHEMICAL REACTION TANKS, WITH FORMER GENERAL OFFICE BUILDING IN BACKGROUND. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along HAER PA,2-DUQU,3E-29.tif - Fæ

LOOKING SOUTH AT A ROW OF STEAM TURBINE WATER PUMPS IN THE MAIN RIVER PUMP HOUSE. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3E-28.tif - Fæ

INTERIOR VIEW OF BLOW ENGINE HOUSE No. 2 LOOKING EAST. CENTRIFUGAL TURBOBLOWER No. 1 IN FOREGROUND. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela HAER PA,2-DUQU,3A-37.tif - Fæ

INTERIOR VIEW OF BLOW ENGINE HOUSE No. 2 WITH AXIAL TURBOBLOWER No. 4. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3A-38.tif - Fæ

SOUTHERN INTERIOR VIEW OF BLOW ENGINE HOUSE No. 2 WITH THE STEAM TURBINE BLADES OF AXIAL TURBOBLOWER No. 4. THE STATOR BLADES OF AXIAL TURBOBLOWER No. 4. THE STATOR BLADES AT THE HAER PA,2-DUQU,3A-39.tif - Fæ

LOOKING EAST IN BLOW ENGINE HOUSE No. 2 AT CASING FOR CENTRIFUGAL TURBOBLOWER No. 3. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne HAER PA,2-DUQU,3A-40.tif - Fæ

NORTHEAST VIEW OF BLOW ENGINE HOUSE No. 3, WITH FILTER CAKE HOUSE IN CENTER FOREGROUND, AND EVAPORATIVE WASTE WATER TREATMENT COOLING TOWER TO THE LEFT. (Jet Lowe) - U.S. Steel HAER PA,2-DUQU,3A-42.tiff - Fæ

NORTHEAST VIEW OF IRON DESULPHERIZATION BUILDING, WITH CALCIUM CARBIDE SILO ADJACENT TO BUILDING ON RIGHT. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along HAER PA,2-DUQU,3A-44.tif - Fæ

LOOKING SOUTHEAST AT THE REMAINS OF THE FERROMANGANESE CRUSHING, SCREENING, AND STORAGE FACILITIES. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela HAER PA,2-DUQU,3A-45.tif - Fæ

SOUTHEAST VIEW OF FERROMANGANESE STORAGE BINS. THE CAR PREPARATION BUILDING IS IN THE BACKGROUND. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela HAER PA,2-DUQU,3A-46.tif - Fæ

VIEW OF BLOW ENGINE HOUSE No. 3 LOOKING SOUTHWEST. (Martin Stupich) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3A-43.tif - Fæ

LOOKING NORTH AT EVAPORATIVE WASTE WATER TREATMENT COOLING TOWERS, WITH BLOW ENGINE HOUSE No. 3 ON RIGHT, AND FILTER CAKE HOUSE IN FOREGROUND. (Jet Lowe) - U.S. Steel Duquesne HAER PA,2-DUQU,3A-49.tif - Fæ

FERROMANGANESE GAS CLEANING PLANT LOOKING WEST. (Martin Stupich) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3A-47.tif - Fæ

LOOKING NORTHEAST AT EIMCO WASTE WATER TREATMENT THICKENER No. 2, ELECTRIC POWERHOUSE No. 2, AND OUTDOOR ELECTRICAL SUBSTATION IN BACKGROUND. (Jet Lowe) - U.S. Steel Duquesne HAER PA,2-DUQU,3A-51.tif - Fæ

NORTHEASTERN EXTERIOR VIEW OF DOOR-OLIVER WAST WATER TREATMENT THICKENER No. 1. ELECTRIC POWERHOUSE No. 2 AND BLOW ENGINE HOUSE No. 3 IS IN THE BACKGROUND. (Jet Lowe) - U.S. Steel HAER PA,2-DUQU,3A-52.tif - Fæ

FERROMANGANESE GAS CLEANING PLANT LOOKING SOUTH. (Martin Stupich) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3A-48.tif - Fæ

LOOKING NORTHEAST IN DORR-OLIVER WASTE WATER TREATMENT THICKENER No. 1. (Martin Stupich) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3A-53.tif - Fæ

VIEW OF DUAL VENTURI GAS WASHER IN THE GAS WASHER PUMP HOUSE LOOKING NORTHEAST. - U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3B-35.tif - Fæ

GENERAL EXTERIOR VIEW OF THE ELECTRIC FURNACE STEELMAKING PLANT LOOKING NORTHEAST. - U.S. Steel Duquesne Works, Electric Furnace Steelmaking Plant, Along Monongahela River, HAER PA,2-DUQU,3C-1.tif - Fæ

EXTERIOR VIEW LOOKING SOUTHEAST AT ELECTRIC FURNACE BUILDING AND ELECTRIC FURNACE OFFICE and CHEMICAL LABORATORY BUILDING. INGOT MOLDS IN RIGHT FOREGROUND. - U.S. Steel Duquesne HAER PA,2-DUQU,3C-2.tif - Fæ

LOOKING WEST INSIDE ELECTRIC FURNACE BUILDING ON CHARGING FLOOR. VIEW OF 7 1-2 TON CAPACITY ALLIANCE SIDE DOOR CHARGING MACHINE. - U.S. Steel Duquesne Works, Electric Furnace HAER PA,2-DUQU,3C-3.tif - Fæ

VIEW LOOKING WEST FROM THE POURING AISLE OF THE ELECTRIC FURNACE BUILDING AT ELECTRIC FURNACE X-3. - U.S. Steel Duquesne Works, Electric Furnace Steelmaking Plant, Along HAER PA,2-DUQU,3C-6.tif - Fæ

LOOKING SOUTHWEST INSIDE OF ELECTRIC FURNACE BUILDING ON GROUND FLOOR OF POURING AISLE. VIEW OF THE NATION'S FIRST VACUUM DEGASSING UNIT (1956). - U.S. Steel Duquesne Works, HAER PA,2-DUQU,3C-5.tif - Fæ

VIEW LOOKING SOUTHWEST FROM THE POURING AISLE AT ELECTRIC FURNACE X-4. - U.S. Steel Duquesne Works, Electric Furnace Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3C-7.tif - Fæ

LOOKING EAST AT SOAKING PIT RECUPERATORS NEAR THE WESTERN WALL OF THE PRIMARY MILL BUILDING. - U.S. Steel Duquesne Works, Primary Mill, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3D-1.tif - Fæ

VIEW OF LOWEY HYDROPRESS GROUND INGOT STRIPPER IN THE PRIMARY MILL BUILDING, LOOKING EAST. - U.S. Steel Duquesne Works, Primary Mill, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3D-2.tif - Fæ

ROW OF INGOT CARS AND INGOTS IN THE PRIMARY MILL BUILDING LOOKING EAST. - U.S. Steel Duquesne Works, Primary Mill, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3D-3.tif - Fæ

SOUTHWARD OVERHEAD VIEW OF INGOT TRANSFER TRACKS AND INGOT BUGGY ADJACENT TO SOAKING PITS ON RIGHT, IN THE PRIMARY MILL BUILDING. - U.S. Steel Duquesne Works, Primary Mill, Along HAER PA,2-DUQU,3D-4.tif - Fæ

LOOKING SOUTHWEST AT THE 21' MILL INSPECTION BUILDING, WITH PATTERN STORAGE BUILDING ON THE RIGHT. - U.S. Steel Duquesne Works, Primary Mill, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3D-10.tif - Fæ

TWO ROWS OF MOTOR GENERATOR SETS EXTENDING NORTHWARD IN THE MOTOR ROOM OF THE PRIMARY MILL. - U.S. Steel Duquesne Works, Primary Mill, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3D-8.tif - Fæ

VIEW OF MOTOR-WINCH DRUM ASSEMBLY FOR INGOT BUGGIES IN THE PRIMARY MILL BUILDING LOOKING SOUTH. - U.S. Steel Duquesne Works, Primary Mill, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3D-5.tif - Fæ

GENERAL NORTHEASTERN EXTERIOR VIEW OF THE MAIN ROLL SHOP. - U.S. Steel Duquesne Works, Primary Mill, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3D-9.tif - Fæ

LOOKING SOUTH AT LOW PURITY BULK OXYGEN BUILDING (FORMERLY BLOW ENGINE HOUSE No. 1), WITH LIQUID OXYGEN STORAGE TANKS IN THE FOREGROUND. - U.S. Steel Duquesne Works, Fuel and HAER PA,2-DUQU,3E-1.tif - Fæ

VIEW OF 46 X 110 BLOOMING AND SLABBING MILL ROLL HOUSING IN THE PRIMARY MILL BUILDING LOOKING EAST. - U.S. Steel Duquesne Works, Primary Mill, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3D-7.tif - Fæ

WESTWARD VIEW OF LOW PURITY BULK OXYGEN BUILDING, AND FERROMANGANESE GAS CLEANING PLANT ON LEFT. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, HAER PA,2-DUQU,3E-2.tif - Fæ

GENERAL EXTERIOR VIEW OF LOW PURITY BULK OXYGEN BUILDING LOOKING NORTHWEST. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3E-4.tif - Fæ

LOOKING WEST IN PRIMARY MILL BUILDING AT SOAKING PITS. - U.S. Steel Duquesne Works, Primary Mill, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3D-6.tif - Fæ

LOOKING WEST IN LOW PURITY BULK OXYGEN BUILDING AT STEAM TURBINE END OF TWO ALLIS-CHALMERS AXIAL AIR COMPRESSORS FOR 1000 TON PER DAY HIGH PURITY OXYGEN MAKING PLANT. - U.S. Steel HAER PA,2-DUQU,3E-6.tif - Fæ

SOUTHEASTERN VIEW TOWARD THE COMPRESSOR END OF TWO ALLIS-CHALMER AXIAL AIR COMPRESSORS IN THE LOW PURITY BULK OXYGEN BUILDING. - U.S. Steel Duquesne Works, Fuel and Utilities Plant HAER PA,2-DUQU,3E-7.tif - Fæ

LOOKING WEST IN LOW PURITY BULK OXYGEN BUILDING AT STEAM TURBINE END OF TWO ALLIS-CHALMER AXIAL AIR COMPRESSORS FOR 1000 TON PER DAY HIGH PURITY OXYGEN MAKING PLANT. - U.S. Steel HAER PA,2-DUQU,3E-5.tif - Fæ

SOUTHWEST VIEW OF LOW PURITY BULK OXYGEN BUILDING, WITH THE LINDE LOW PURITY OXYGEN FRACTIONATING TOWERS ON LEFT. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along HAER PA,2-DUQU,3E-3.tif - Fæ

VIEW OF AFTERCOOLER FOR ALLIS-CHALMER AXIAL AIR COMPRESSORS IN THE LOW PURITY BULK OXYGEN BUILDING LOOKING WEST. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along HAER PA,2-DUQU,3E-9.tif - Fæ

VIEW OF AFTERCOOLER FOR ALLIS-CHALMER AXIAL AIR COMPRESSORS IN THE LOW PURITY BULK OXYGEN BUILDING LOOKING WEST. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along HAER PA,2-DUQU,3E-8.tif - Fæ

VIEW OF THE NORTHERN FACADE OF THE MAIN OFFICE BUILDING FOR THE DUQUESNE STEEL WORKS. THE BUILDING IS CURRENTLY OCCUPIED BY THE OFFICES OF THE REGIONAL INDUSTRIAL DEVELOPMENT HAER PA,2-DUQU,3F-1.tif - Fæ

MAIN GUARD HOUSE AND HOSPITAL LOOKING SOUTHEAST. - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3F-2.tif - Fæ

LOOKING NORTHWEST AT THE GENERAL MACHINE SHOP. - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3F-3.tif - Fæ

LOOKING NORTHWEST AT BOILER FEEDWATER CHEMICAL REACTION TANKS. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3E-30.tif - Fæ

NORTHEASTERN VIEW OF THE CAR REPAIR SHOP (FORMERLY THE LADLE HOUSE). - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along Monongahela River, Duquesne, Allegheny County HAER PA,2-DUQU,3F-4.tif - Fæ

CLOSE-UP BETWEEN BOILER FEEDWATER CHEMICAL REACTION TAKES, LOOKING NORTHWEST. - U.S. Steel Duquesne Works, Fuel and Utilities Plant, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3E-31.tif - Fæ

NORTHEASTERN VIEW OF THE CARPENTER SHOP (CENTER LEFT), AND PATTERN STORAGE BUILDING (CENTER RIGHT). PARTIAL VIEW OF THE 21 MILL INSPECTION BUILDING IN THE FOREGROUND TO THE RIGHT. HAER PA,2-DUQU,3F-5.tif - Fæ

LOOKING NORTH IN THE SIXTH FLOOR OF THE PATTERN STORAGE BUILDING AT PATTERNS. (Jet Lowe) - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along Monongahela River, HAER PA,2-DUQU,3F-8.tif - Fæ

LOOKING SOUTH AT THE CARPENTER SHOP, WITH PARTIAL VIEW OF PATTERN STORAGE BUILDING TO THE LEFT. (Jet Lowe) - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along HAER PA,2-DUQU,3F-6.tif - Fæ

SOUTHEAST VIEW OF THE TRANSPORTATION OFFICE BUILDING AT THE BASE OF THE ORE BRIDGES. (Jet Lowe) - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along Monongahela River HAER PA,2-DUQU,3F-11.tif - Fæ

VIEW OF PATTERN STORAGE BUILDING WITH CAFETERIA IN FOREGROUND LOOKING SOUTHWEST. - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3F-7.tif - Fæ

LOOKING NORTH IN THE FOURTH FLOOR OF THE PATTERN STORAGE BUILDING. (Jet Lowe) - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3F-9.tif - Fæ

VIEW OF THE OPEN HEARTH STEELMAKING OFFICE BUILDING WITH BOP SHOP IN BACKGROUND LOOKING SOUTHEAST. - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along Monongahela HAER PA,2-DUQU,3F-10.tif - Fæ

NORTHEAST VIEW OF THE WASTE WATER TREATMENT COMPLEX FOR THE PRIMARY AND 22 BAR MILLS. - U.S. Steel Duquesne Works, Auxiliary Buildings and Shops, Along Monongahela River, Duquesne HAER PA,2-DUQU,3F-12.tif - Fæ

48" brick well in front of former USS Duquense works rolling mill. - Hamilton Avenue Well, Hamilton Avenue at Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,1-2.tif - Fæ

INTERIOR VIEW LOOKING NORTHWEST OF PRE-HEATING FURNACE BUILDING AT LOFTUS CONTINUOUS FURNACE. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3G-2.tif - Fæ

INSIDE BATCH FURNACE BUILDING, VIEW LOOKING NORTH AT REGENERATIVE BATCH FURNACES ON LEFT AND 5 TON CAPACITY CHARGING MACHINE ON RIGHT. - U.S. Steel Duquesne Works, 22-Inch Bar Mill HAER PA,2-DUQU,3G-3.tif - Fæ

EXTERIOR VIEW LOOKING NORTHWEST AT BATCH FURNACE BUILDING, 22' BAR MILL BUILDING, AND 22 BAR MILL MOTOR ROOM. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River HAER PA,2-DUQU,3G-1.tif - Fæ

INTERIOR VIEW OF 22' BAR MILL BUILDING, LOOKING SOUTH AT THREE-HIGH, 28 ROUGHING ROLL STAND. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3G-5.tif - Fæ

VIEW LOOKING SOUTHEAST INSIDE OF 22' BAR MILL MOTOR ROOM AT MOTOR-GEAR DRIVE ASSEMBLY FOR THE THREE HIGH, 28 ROUGHING ROLL STAND. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, HAER PA,2-DUQU,3G-7.tif - Fæ

VIEW LOOKING SOUTHEAST INSIDE OF THE 22' BAR MILL BUILDING AT THE UNITED HOT SAW. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, Duquesne, Allegheny HAER PA,2-DUQU,3G-10.tif - Fæ

VIEW LOOKING SOUTH INSIDE OF 22' BAR MILL MOTOR ROOM AT MOTOR-GEAR DRIVE ASSEMBLY FOR THE THREE HIGH, 28 ROUGHING ROLL STAND. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along HAER PA,2-DUQU,3G-6.tif - Fæ

SOUTHWEST VIEW INSIDE 22' BAR MILL BUILDING, LOOKING AT THE HOT BED. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3G-11.tif - Fæ

VIEW LOOKING NORTHWEST INSIDE OF THE 22' BAR MILL MOTOR ROOM AT AN ELECTRICAL SWITCH BOARD. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3G-9.tif - Fæ

VIEW LOOKING SOUTHWEST INSIDE OF THE 22' BAR MILL MOTOR ROOM AT THE REVERSING MOTOR-GEAR DRIVE ASSEMBLY FOR THE TWO-HIGH 22 FINISHING ROLL STANDS. - U.S. Steel Duquesne Works, 22 HAER PA,2-DUQU,3G-8.tif - Fæ

LOOKING NORTH INSIDE OF THE 22' BAR STOCKING AND FINISHING BUILDING AT THE 22' BAR MILL. RUNOUT TABLE ON LEFT AND THE SLOW COOLING PITS ON THE RIGHT. - U.S. Steel Duquesne Works, HAER PA,2-DUQU,3G-12.tif - Fæ

VIEW LOOKING NORTHEAST INSIDE OF THE 22' BAR STOCKING AND FINISHING BUILDING AT THE PICKLING VATS. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, Duquesne HAER PA,2-DUQU,3G-14.tif - Fæ

SALEM-BROSIUS CONTINUOUS GAS-FIRED HEAT TREATING LINE AT HEAT TREATMENT PLANT OF THE DUQUESNE WORKS. - U.S. Steel Duquesne Works, Heat Treatment Plant, Along Monongahela River, HAER PA,2-DUQU,3H-2.tif - Fæ

GENERAL VIEW OF AJAX MAGNETHERMIC HEAT TREATING LINE AT THE HEAT TREATMENT PLANT OF THE DUQUESNE WORKS. - U.S. Steel Duquesne Works, Heat Treatment Plant, Along Monongahela River, HAER PA,2-DUQU,3H-4.tif - Fæ

HOT BED FOR SALEM-BROSIUS CONTINUOUS GAS-FIRED HEAT TREATING LINE AT THE HEAT TREATMENT PLANT OF THE DUQUESNE WORKS. - U.S. Steel Duquesne Works, Heat Treatment Plant, Along HAER PA,2-DUQU,3H-3.tif - Fæ

HOT BED FOR THE AJAX MAGNETHERMIC HEAT TREATING LINE AT THE HEAT TREATMENT PLANT OF THE DUQUESNE WORKS. - U.S. Steel Duquesne Works, Heat Treatment Plant, Along Monongahela River, HAER PA,2-DUQU,3H-6.tif - Fæ

VIEW LOOKING NORTHEAST INSIDE 22' BAR MILL AT THE DESCALER. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3G-4.tif - Fæ

VIEW LOOKING SOUTHWEST INSIDE OF THE 22' BAR MILL SHIPPING BUILDING No. 1 AT THE 10' SUTTON BAR STRAIGHTENER. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela HAER PA,2-DUQU,3G-15.tif - Fæ

LOOKING NORTH INSIDE OF THE 22 BAR STOCKING AND FINISHING BUILDING AT THE SLOW COOKING PITS. - U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, Duquesne, HAER PA,2-DUQU,3G-13.tif - Fæ

VIEW LOOKING SOUTHEAST INSIDE OF THE HEAT TREATMENT BUILDING AT BATCH FURNACES, QUENCHING PIT IN FOREGROUND. - U.S. Steel Duquesne Works, Heat Treatment Plant, Along Monongahela HAER PA,2-DUQU,3H-1.tif - Fæ

DETAIL VIEW OF AJAX MAGNETHERMIC HEAT TREATING LINE AT THE HEAT TREATMENT PLANT OF THE DUQUESNE WORKS. - U.S. Steel Duquesne Works, Heat Treatment Plant, Along Monongahela River, HAER PA,2-DUQU,3H-5.tif - Fæ

VIEW OF BILLET PEELERS AT THE HEAT TREATMENT PLANT OF THE DUQUESNE WORKS. - U.S. Steel Duquesne Works, Heat Treatment Plant, Along Monongahela River, Duquesne, Allegheny County, PA HAER PA,2-DUQU,3H-9.tif - Fæ

VIEW OF THE HOT BED FOR THE CONTINUOUS ELECTRIC FURNACE HEAT TREATING LINE AT THE HEAT TREATMENT PLANT OF THE DUQUESNE WORKS. - U.S. Steel Duquesne Works, Heat Treatment Plant, HAER PA,2-DUQU,3H-7.tif - Fæ

QUENCHING MECHANISM FOR THE CONTINUOUS ELECTRIC FURNACE HEAT TREATING LINE AT THE HEAT TREATMENT PLANT OF THE DUQUESNE WORKS. - U.S. Steel Duquesne Works, Heat Treatment Plant, HAER PA,2-DUQU,3H-8.tif - Fæ