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POWER GENERATION AND TRANSMISSION U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 239) Historic Name: U.S.S. Corporation, Duquesne Works, Power Plant Present Name: U.S.X. Corporation, Duquesne Works, Power Plant Location: Upper Works Construction: 1924, 1957, 1962 Documentation: Photographs of the Power Plant can be found in HAER No. PA-115-E. DESCRIPTION I. River Intake Building: Laid-out on a north-south axis, the one story, 46' long x 24' wide River Intake Building is located on the edge of the Monongahela River's shoreline, approximately 35' north of the Car Repair Shop (Old Ladle House). Constructed on a concrete foundation by the American Bridge Company, the building's brick exterior encases a steel frame. The building's slanted roof is supported by Fink trusses. Laid out on a straight line on top of a small balcony off of the inside eastern wall of the building are three small motor-driven winch drum assemblies which were used to raise and lower the three sluice gates that admitted river water into the works' water system. Located near the eastern wall of the building on the first floor and also laid out on a straight line running north and south are three motor-driven assemblies which powered a chain belt manufactured by the Rex Chain Belt Company. The assemblies were used to rotate screens which filtered out debris from river water that was being introduced to the work's water system. All equipment was serviced by one of two manually operated Harrington-Peerless 2-ton overhead cranes which were located near the eastern or western wall of the building. Original construction date: 1896, modified: 1924. II. Main River Water Pump House: The one story high Main River Pump House is located 34' due north of the Car Repair Shop. It consists of an older, main section, 132* long x 45' wide that was constructed on a concrete foundation by the Keystone Bridge Company. A 43 f long x 30* wide annex, and a 35' long x 45 f wide corrugated metal annex have been added to its respective northern and southern ends. Laid out on a north-south axis, the building's steel frame is encased by brick walls. Riveted Fink trusses support its gabled roof. Tall segmented archway windows rim the eastern and western walls of the building. The building consists of two floors (first floor and basement), both of which are functional. The first floor is composed of a walkway which surrounds a large opening cut into the middle of the floor that provides access to the basement or operating floor for a 5-ton overhead travelling crane. A Nash Hy-tor vacuum pump, located at
U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 240) the midpoint of the first floor near the inside western wall, drew air from the outside by means of a hole cut into the wall and pushed it downstairs into the basement, thereby ventilating the facility. The basement houses eight large centrifugal pumps which provided service and process water to the different plants within the works. In the original section of the building there are four Worthington, 800 hp steam turbine engines which each drive a Wilson-Snyder Pump rated at 15,650 gpm. Equally spaced, each steam turbine/pump arrangement is laid out on an east-west axis. The northern annex of the building contains two electric motor/centrifugal pump arrangements, each laid out on a east-west axis. The northern most arrangement consists of a 800 hp Western Electric induction motor driving a 14,000 gpm centrifugal pump manufactured by the DeLaval Steam Turbine Company. The other arrangement consists of an EM Heavy-Duty Squirrel Cage induction motor driving a 14,000 gpm Wilson-Snyder Pump. The southern annex contains two equally spaced 880 hp Elliot Steam Turbine/26,000 gpm Wilson-Snyder pump arrangements which are laid out on a north-south axis. Construction dates: original pump house, 1896; northern annex, ca. 1910; southern annex, ca. 1925. III. Water Treatment Filter Building and Reaction Tanks: Laid out on a northwest-southeast axis, the Water Treatment Filter Building and Reaction Tanks are located approximately 150' north of the blast furnace ore yard near the western boundary of the works. The structures and equipment—consisting primarily of four 43* diameter, 487,700 gallon reaction tanks and a two story, 66*-6 1/2" long x 57'-6 1/2" wide brick building—within this area were used to soften and remove excess particulate from water to be used in the works 1 boiler or steam production system. Water was delivered from the main river water pump house to one of the reaction tanks where it was treated with water softening chemicals (i.e. lime, soda ash, sodium aluminate, and polymer) before being pumped over to the filter building where it was passed through gravity sand filters in order to remove remaining particulate. Upon passing through the sand filters, the water settled into a reservoir where it was decanted before being pumped to the boiler feed water system located in Blow Engine House No. 2. Located between the reaction tanks, which are laid out in pairs forming two rows, is an approximately 30' square x 9' high corrugated metal shed. The shed provides a covering for the 3 0 hp motor-drive assemblies that control the mixer impellers, manufactured by the Lightning Mixing Equipment Company, located in each tank.
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FART THREE: 1946-1988 U.S. STEEL DU
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seeks to develop it into an industr
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Installation Date: 1955. U.S. STEEL
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cooling tower has a capacity of 190
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* * tunnel beneath the clarifier. I
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Historic Name Present Name: Locatio
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dumped. Construction Date: 1957. U.
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STEELMAKING PLANT - HEAT TREATMENT
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and is set into the floor of the bu
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