U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel National Tube Works, Main Pipe Mill Building, Along Mononga...
Survey number: HAER PA-380-A Building/structure dates: 1906 Public domain photograph - historical image of Pennsylvania, United States, free to use, no copyright restrictions image - Picryl description
U.S. Steel Homestead Works, 48" Plate Mill, Along Monongahela River, H...
See also HAER PA-200 for additional documentation. Includes written data (pages 99 through 101). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the n... More
U.S. Steel Homestead Works, 48" Plate Mill, Along Monongahela River, H...
See also HAER PA-200 for additional documentation. Includes written data (pages 99 through 101). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the n... More
U.S. Steel Homestead Works, Auxiliary Buildings & Shops, Along Mononga...
See also HAER PA-200 for additional documentation. Includes written data (pages 147 through 179). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the ... More
U.S. Steel Homestead Works, Auxiliary Buildings & Shops, Along Mononga...
See also HAER PA-200 for additional documentation. Includes written data (pages 147 through 179). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the ... More
U.S. Steel Homestead Works, Auxiliary Buildings & Shops, Along Mononga...
See also HAER PA-200 for additional documentation. Includes written data (pages 147 through 179). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the ... More
U.S. Steel Duquesne Works, Fuel & Utilities Plant, Along Monongahela R...
See also HAER PA-115 for additional documentation. Includes written data (pages 239 through 248). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward inte... More
U.S. Steel Duquesne Works, Fuel & Utilities Plant, Along Monongahela R...
See also HAER PA-115 for additional documentation. Includes written data (pages 239 through 248). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward inte... More
A sketch of the field of battle with the disposition of the troops in ...
Scale 1:10,800; 300 yards to an in. Manuscript, pen-and-ink. Relief shown by hachures. The name R. Ohio applies also to the Allegheny. "No. 27." Available also through the Library of Congress Web site as a rast... More
Houses along Monongahela River and Boulevard of the Allies. Pittsburgh...
Public domain photograph of Pennsylvania in 1930s, free to use, no copyright restrictions image - Picryl description
House on Monongahela River, which is used in three shifts as sleeping ...
Public domain photograph of 1930s-1940s train station, train car, no copyright restrictions image - Picryl description
Pennsylvania: A black and white photo of a river. Great Depression
Public domain photograph - United States during the 1930s and 1940s, Farm Security Administration, New Deal, free to use, no copyright restrictions image - Picryl description
The Allegheny and Monongahela Rivers form the Ohio River in Pittsburgh...
Digital image produced by Carol M. Highsmith to represent her original film transparency; some details may differ between the film and the digital images. Title, date, and keywords provided by the photographer.... More
Monongahela Incline Plane, Connecting North side of Grandview Avenue a...
Significance: The first constructed and oldest passenger incline plane in Pittsburgh, this system retains the 1882 safety brake and bull wheel and 1935 electrical system including drive motors, operating brakes... More
Monongahela Incline Plane, Connecting North side of Grandview Avenue a...
Significance: The first constructed and oldest passenger incline plane in Pittsburgh, this system retains the 1882 safety brake and bull wheel and 1935 electrical system including drive motors, operating brakes... More
Monongahela Incline Plane, Connecting North side of Grandview Avenue a...
Significance: The first constructed and oldest passenger incline plane in Pittsburgh, this system retains the 1882 safety brake and bull wheel and 1935 electrical system including drive motors, operating brakes... More
U.S. Steel Edgar Thomson Works, 44" Slab Mill, Along Monongahela River...
Survey number: HAER PA-384-D Building/structure dates: 1915 Initial Construction
U.S. Steel National Tube Works, Auxiliary Buildings, Along Monongahela...
Survey number: HAER PA-380-E Public domain photograph - historical image of Pennsylvania, United States, free to use, no copyright restrictions image - Picryl description
U.S. Steel National Tube Works, Auxiliary Buildings, Along Monongahela...
Survey number: HAER PA-380-E Public domain photograph - historical image of Pennsylvania, United States, free to use, no copyright restrictions image - Picryl description
Conrail Port Perry Bridge, Spanning Monongahela River, Port Perry, All...
Part of the Monongahela River Recording Project, which included HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela Rive... More
Conrail Port Perry Bridge, Spanning Monongahela River, Port Perry, All...
Part of the Monongahela River Recording Project, which included HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela Rive... More
Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...
Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More
Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...
Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More
Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...
Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More
Houses along Monongahela River and Boulevard of the Allies. Pittsburgh...
Public domain photograph of Pennsylvania in 1930s, free to use, no copyright restrictions image - Picryl description
Monongahela Connecting Railroad Company, Hot Metal Bridge, Spanning Mo...
Significance: Formerly enabled the hauling of molten iron from J & L Blast Furnaces on the north side over the bridge to the Open Hearth Furnaces on the south side of the Monongahela River. Survey number: HAER... More
U.S. Steel Homestead Works, Machine Shop No. 1, Along Monongahela Rive...
Picryl description: Public domain photo of a factory, warehouse, commercial or industrial building, free to use, no copyright restrictions image.
U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela Riv...
See also HAER PA-200 for additional documentation. Includes written data (pages 76 through 94). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the na... More
U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela Riv...
See also HAER PA-200 for additional documentation. Includes written data (pages 76 through 94). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the na... More
U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela Riv...
See also HAER PA-200 for additional documentation. Includes written data (pages 76 through 94). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the na... More
U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela Riv...
See also HAER PA-200 for additional documentation. Includes written data (pages 76 through 94). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the na... More
U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela Riv...
See also HAER PA-200 for additional documentation. Includes written data (pages 76 through 94). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the na... More
Monongahela Railroad, New Geneva Bridge, Spanning Monongahela River, S...
Significance: The bridge at New Geneva is significant for its long Petit through through truss, and more importantly, for its erection by end manufacturing. At the time of its construction, it was the longest a... More
Monongahela Railroad, New Geneva Bridge, Spanning Monongahela River, S...
Significance: The bridge at New Geneva is significant for its long Petit through through truss, and more importantly, for its erection by end manufacturing. At the time of its construction, it was the longest a... More
U.S. Steel Homestead Works, Press Shop No. 2, Along Monongahela River,...
See also HAER PA-200 for additional documentation. Includes written data (pages 134 & 135). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the nation... More
U.S. Steel Homestead Works, Structural Mill, Along Monongahela River, ...
See also HAER PA-200 for additional documentation. Includes written data (pages 124 through 130). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the ... More
U.S. Steel Homestead Works, Structural Mill, Along Monongahela River, ...
See also HAER PA-200 for additional documentation. Includes written data (pages 124 through 130). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the ... More
U.S. Steel Homestead Works, Along Monongahela River, north of Eighth A...
Significance: Established in 1879, Homestead Works is one of six plants (Homestead, Edgar Thomson, Duquesne, Irvin, National and Clairton) which, until the collapse in 1982, comprised U.S. Steel's Mon Valley wo... More
Old Brownsville Bridge, Spanning Monongahela River & Water Street at S...
Significance: The Pennsylvania truss bridge spans the Monongahela River between Brownsville and West Brownsville. The bridge is heavily constructed of built-up members and eye-bars, and is a significant landmar... More
Taylor Run-Yorty Run Schoolhouse, Legislative Routes 62175 (PA Highway...
Significance: Although much altered in this century, the Taylor Run-Yorty Run School House still serves as an example of the vernacular public architecture of the middle third of the nineteenth century. With be... More
Taylor Run-Yorty Run Schoolhouse, Legislative Routes 62175 (PA Highway...
Significance: Although much altered in this century, the Taylor Run-Yorty Run School House still serves as an example of the vernacular public architecture of the middle third of the nineteenth century. With be... More
Taylor Run-Yorty Run Schoolhouse, Legislative Routes 62175 (PA Highway...
Significance: Although much altered in this century, the Taylor Run-Yorty Run School House still serves as an example of the vernacular public architecture of the middle third of the nineteenth century. With be... More
Taylor Run-Yorty Run Schoolhouse, Legislative Routes 62175 (PA Highway...
Significance: Although much altered in this century, the Taylor Run-Yorty Run School House still serves as an example of the vernacular public architecture of the middle third of the nineteenth century. With be... More
U.S. Steel Homestead Works, 160" Plate Mill, Along Monongahela River, ...
See also HAER PA-301 for additional documentation. Includes drawings & written data. See also HAER PA-200 for additional documentation. Includes written data (pages 110 through 119). Significance: As a group, t... More
U.S. Steel Homestead Works, 160" Plate Mill, Along Monongahela River, ...
See also HAER PA-301 for additional documentation. Includes drawings & written data. See also HAER PA-200 for additional documentation. Includes written data (pages 110 through 119). Significance: As a group, t... More
West End-North Side Bridge, Spanning Ohio River, approximately 1 mile ...
Photographs cover approach spans only; Ohio River span not shown. Significance: After two decades of agitation by the local business community, the West End-North Side Bridge was completed in 1932 by the Americ... More
Smithfield Street Bridge, Spanning Monongahela River on Smithfield Str...
Significance: Designed by Gustav Lindenthal, one of America's most famous bridge engineers, as a two-lane bridge. One lane was erected in 1883, and another was added in 1891. The span is Pittsburgh's most gra... More
Charleroi-Monessen Bridge, Spanning Monongahela River at State Route 2...
Significance: It is significant as a rare surviving example of a long, multiple-span metal truss bridge. Built as a toll bridge to carry vehicular, pedestrian, and trolley traffic across the Monongahela River, ... More
U.S. Steel Edgar Thomson Works, Blast Furnace Plant, Along Monongahela...
Survey number: HAER PA-384-A Building/structure dates: 1898 Initial Construction Building/structure dates: 1916 Subsequent Work Building/structure dates: 1927 Subsequent Work Building/structure dates: 1941-... More
Baltimore & Ohio Railroad, Fairmont Bridge, Spanning Monongahela River...
Significance: The first all-metal bridge on the Fink plan, its detailing influenced the development of pin-connection in American bridges. Longest iron bridge in the United States in 1852. Survey number: HAER... More
Baltimore & Ohio Railroad, Fairmont Bridge, Spanning Monongahela River...
Significance: The first all-metal bridge on the Fink plan, its detailing influenced the development of pin-connection in American bridges. Longest iron bridge in the United States in 1852. Survey number: HAER... More
Monongahela Connecting Railroad Company, Main Bridge, Spanning Mononga...
Significance: Major connection between the north and south sides of the plant which was separated by the Monongahela River. Practically all of the intra-mill transfer of materials crossed this bridge during th... More
The navigator : containing directions for navigating the Monongahela, ...
Picryl description: Public domain illustrated travel, exploration, and geography book page scan, free to use, no copyright restrictions image.
U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, ...
See also HAER PA-115 for additional documentation. Includes written data (pages 227 through 238). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward inte... More
U.S. Steel Duquesne Works, 22-Inch Bar Mill, Along Monongahela River, ...
See also HAER PA-115 for additional documentation. Includes written data (pages 227 through 238). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward inte... More
U.S. Steel Duquesne Works, Heat Treatment Plant, Along Monongahela Riv...
See also HAER PA-115 for additional documentation. Includes written data (pages 182 through 189). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward inte... More
U.S. Steel Duquesne Works, Heat Treatment Plant, Along Monongahela Riv...
See also HAER PA-115 for additional documentation. Includes written data (pages 182 through 189). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward inte... More
U.S. Steel National Tube Works, Skelp Mill Building, Along Monongahela...
Survey number: HAER PA-380-B Building/structure dates: 1906 Public domain photograph - historical image of Pennsylvania, United States, free to use, no copyright restrictions image - Picryl description
Point Bridge, Spanning Monongahela River at Point of Pittsburgh, Pitts...
See also HABS PA-604 for additional documentation. Includes drawings. See also HAER PA-3 for additional documentation. Includes written data. Significance: This bridge, the second to be built near this site, wa... More
Pennsylvania Railroad, West Brownsville Junction Bridge, Spanning Mono...
Significance: This bridge's 401'-long Petit through truss is typical of long spans required on Monongahela River navigation. Its approaches feature an early installation of a reinforced concrete slab floor. Un... More
U.S. Steel Duquesne Works, Auxiliary Buildings & Shops, Along Monongah...
Picryl description: Public domain image of an industrial building, warehouse, depot, train station, 19th-20th century, free to use, no copyright restrictions.
U.S. Steel Duquesne Works, Auxiliary Buildings & Shops, Along Monongah...
Picryl description: Public domain photo of a factory, warehouse, commercial or industrial building, free to use, no copyright restrictions image.
U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monon...
See also HAER PA-115 for additional documentation. Includes written data (pages 190 through 210). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward inte... More
U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monon...
See also HAER PA-115 for additional documentation. Includes written data (pages 190 through 210). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward inte... More
U.S. Steel Edgar Thomson Works, Along Monongahela River, Braddock, All...
Significance: Named after the president of the Pennsylvania Railroad and early financial backer of the enterprises, was the first integrated Bessener steel works constructed in the Pittsburgh district by Andrew... More
Buffalo Creek Bridge, U.S. Route 19, spanning Buffalo Creek near confl...
Significance: The Buffalo Creek Bridge was constructed with funds appropriated under the National Industrial Recovery Act of 1933 (NIRA). Under the direction of the Public Works Administration (PWA), the NIRA ... More
Brady Street Bridge, Spanning Monongahela River at South Twenty-second...
See also HABS PA-614 for additional documentation. Includes drawings. Significance: The Brady Street Bridge, contracted by the Schultz Bridge & Iron Co. of Pittsburgh, was a steel-riveted, through-highway bridg... More
Monongahela Railway Company Shops, Water Street & Seventeenth Street, ...
Significance: The Monongahela Railway Company Shops reflect the support needs of a railroad significant in the coal, coke, and steel industries of Southwest Pennsylvania in the twentieth century, particularly i... More
Monongahela Railway Company Shops, Water Street & Seventeenth Street, ...
Significance: The Monongahela Railway Company Shops reflect the support needs of a railroad significant in the coal, coke, and steel industries of Southwest Pennsylvania in the twentieth century, particularly i... More
Monongahela Railway Company Shops, Water Street & Seventeenth Street, ...
Significance: The Monongahela Railway Company Shops reflect the support needs of a railroad significant in the coal, coke, and steel industries of Southwest Pennsylvania in the twentieth century, particularly i... More
W. A. Young & Sons Foundry & Machine Shop, On Water Street along Monon...
Significance: W. A. Young and Sons Foundry and Machine Shop is a well-preserved example of a local machine shop that served the industrial and personal needs of its surrounding area. It represents a transition... More
W. A. Young & Sons Foundry & Machine Shop, On Water Street along Monon...
Significance: W. A. Young and Sons Foundry and Machine Shop is a well-preserved example of a local machine shop that served the industrial and personal needs of its surrounding area. It represents a transition... More
W. A. Young & Sons Foundry & Machine Shop, On Water Street along Monon...
Significance: W. A. Young and Sons Foundry and Machine Shop is a well-preserved example of a local machine shop that served the industrial and personal needs of its surrounding area. It represents a transition... More
W. A. Young & Sons Foundry & Machine Shop, On Water Street along Monon...
Significance: W. A. Young and Sons Foundry and Machine Shop is a well-preserved example of a local machine shop that served the industrial and personal needs of its surrounding area. It represents a transition... More
W. A. Young & Sons Foundry & Machine Shop, On Water Street along Monon...
Significance: W. A. Young and Sons Foundry and Machine Shop is a well-preserved example of a local machine shop that served the industrial and personal needs of its surrounding area. It represents a transition... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela Rive...
See also HAER PA-115 for additional documentation. Includes written data (pages 55 through 158). Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integ... More
U.S. Steel National Tube Works, Main Pipe Mill Building, Along Mononga...
Survey number: HAER PA-380-A Building/structure dates: 1906 Public domain photograph - historical image of Pennsylvania, United States, free to use, no copyright restrictions image - Picryl description
U.S. Steel National Tube Works, Main Pipe Mill Building, Along Mononga...
Survey number: HAER PA-380-A Building/structure dates: 1906 Public domain photograph of manufacturing workers, factory building, assembly line, free to use, no copyright restrictions image - Picryl description
U.S. Steel National Tube Works, Main Pipe Mill Building, Along Mononga...
Survey number: HAER PA-380-A Building/structure dates: 1906 Public domain photograph of manufacturing workers, factory building, assembly line, free to use, no copyright restrictions image - Picryl description
U.S. Steel Homestead Works, 48" Plate Mill, Along Monongahela River, H...
See also HAER PA-200 for additional documentation. Includes written data (pages 99 through 101). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the n... More
U.S. Steel Homestead Works, 48" Plate Mill, Along Monongahela River, H...
See also HAER PA-200 for additional documentation. Includes written data (pages 99 through 101). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the n... More
U.S. Steel Homestead Works, 48" Plate Mill, Along Monongahela River, H...
See also HAER PA-200 for additional documentation. Includes written data (pages 99 through 101). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the n... More
U.S. Steel Homestead Works, 48" Plate Mill, Along Monongahela River, H...
See also HAER PA-200 for additional documentation. Includes written data (pages 99 through 101). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the n... More
U.S. Steel Homestead Works, 48" Plate Mill, Along Monongahela River, H...
See also HAER PA-200 for additional documentation. Includes written data (pages 99 through 101). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the n... More
U.S. Steel Homestead Works, Auxiliary Buildings & Shops, Along Mononga...
See also HAER PA-200 for additional documentation. Includes written data (pages 147 through 179). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the ... More
U.S. Steel Homestead Works, Auxiliary Buildings & Shops, Along Mononga...
See also HAER PA-200 for additional documentation. Includes written data (pages 147 through 179). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the ... More
U.S. Steel Homestead Works, Auxiliary Buildings & Shops, Along Mononga...
See also HAER PA-200 for additional documentation. Includes written data (pages 147 through 179). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the ... More
U.S. Steel Homestead Works, Auxiliary Buildings & Shops, Along Mononga...
See also HAER PA-200 for additional documentation. Includes written data (pages 147 through 179). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the ... More