Griffin No. 1 Coke Works, Along Cats Run, Southeast of Masontown Bouro...
Significance: During peak production, Griffin No. 1 Coke Works operated one battery of double-block rectangular coke ovens. Sections of these ovens remain and are considered some of the best preserved rectangu... More
Griffin No. 1 Coke Works, Along Cats Run, Southeast of Masontown Bouro...
Significance: During peak production, Griffin No. 1 Coke Works operated one battery of double-block rectangular coke ovens. Sections of these ovens remain and are considered some of the best preserved rectangu... More
Royer House, Springfield Furnace, State Highway 866, .25 mile North of...
Significance: Built by the Royer family about 1810; John Royer settled in this area around 1805. Along with his brother Daniel, he established an iron furnace one-quarter mile to the south, on Piney Creek. The ... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Carnegie Institute of Washington, Department of Terrestrial Magnetism,...
Significance: The Atomic Physics Observatory (APO) was completed in 1938 to improve the capability of measuring the earth's magnetic fields which was undertaken by the Carnegie Institution of Washington's Depar... More
Chicago River Bascule Bridge, West Cortland Street, Spanning North Bra...
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg... More
Carnegie Institute of Washington, Department of Terrestrial Magnetism,...
Significance: The Carnegie Institution of Washington, with funds provided by industrialist and philanthropist Andrew Carnegie, established the Department of Terrestrial Magnetism 9 DTM) in 1904 to survey and me... More
Shoaf Mine & Coke Works, East side of Shoaf, off Township Route 472, S...
See also HAER PA-283 for additional documentation. Includes drawings (sheets 5 & 6) & written data (pages 172 through 180). Significance: The Shoaf coke works is the most intact beehive-oven coke plant in Fayet... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Carnegie Institute of Washington, Department of Terrestrial Magnetism,...
Significance: The Carnegie Institution of Washington, with funds provided by industrialist and philanthropist Andrew Carnegie, established the Department of Terrestrial Magnetism 9 DTM) in 1904 to survey and me... More
Shoaf Mine & Coke Works, East side of Shoaf, off Township Route 472, S...
See also HAER PA-283 for additional documentation. Includes drawings (sheets 5 & 6) & written data (pages 172 through 180). Significance: The Shoaf coke works is the most intact beehive-oven coke plant in Fayet... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Scottdale Iron & Steel Works, Uptegraff Drive, Scottdale, Westmoreland...
Significance: One of the earliest steel and iron works in Westmoreland County, the company produced iron and steel sheets and became a subsidiary of U.S. Steel in the early 20th century. Reborn as an electrica... More
Town of Leisenring, Either side of State Route 1039 at intersection wi...
Significance: Typical southwestern Pennsylvania company town built to house miners and coke workers. Company store is one unique and is one of the best preserved of its type in the region. Survey number: HAER... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Ricks Foundry, Miller Avenue off South Mount Vernon Street, Uniontown,...
Significance: Ricks manufactured the Covington coke puller, the most widely-used mechanical coke-drawing machine in the Connellsville Region. Survey number: HAER PA-366 Building/structure dates: ca. 1900 Init... More
Carnegie Institute of Washington, Department of Terrestrial Magnetism,...
Significance: The Carnegie Institution of Washington, with funds provided by industrialist and philanthropist Andrew Carnegie, established the Department of Terrestrial Magnetism 9 DTM) in 1904 to survey and me... More
Shoaf Mine & Coke Works, East side of Shoaf, off Township Route 472, S...
See also HAER PA-283 for additional documentation. Includes drawings (sheets 5 & 6) & written data (pages 172 through 180). Significance: The Shoaf coke works is the most intact beehive-oven coke plant in Fayet... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Royer House, Springfield Furnace, State Highway 866, .25 mile North of...
Significance: Built by the Royer family about 1810; John Royer settled in this area around 1805. Along with his brother Daniel, he established an iron furnace one-quarter mile to the south, on Piney Creek. The ... More
Chicago River Bascule Bridge, West Cortland Street, Spanning North Bra...
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg... More
Shoaf Mine & Coke Works, East side of Shoaf, off Township Route 472, S...
See also HAER PA-283 for additional documentation. Includes drawings (sheets 5 & 6) & written data (pages 172 through 180). Significance: The Shoaf coke works is the most intact beehive-oven coke plant in Fayet... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Colonial Mines Bathhouse, Smock, Fayette County, PA
Significance: Constructed by the H.C. Frick Coke Company during the late 1910s expansion of the company's coal properties in the Connellsville and Klondike districts, this building originally served as a bath a... More
Greensburg Railroad Station, Harrison Avenue, Greensburg, Westmoreland...
Significance: A principal stop on the mainline of the Pennsylvania Railroad, the Greensburg Station is now listed on the National Register. Survey number: HAER PA-249 Building/structure dates: 1910- 1911 I... More
Carnegie Institute of Washington, Department of Terrestrial Magnetism,...
Significance: The Carnegie Institution of Washington, with funds provided by industrialist and philanthropist Andrew Carnegie, established the Department of Terrestrial Magnetism 9 DTM) in 1904 to survey and me... More
Carnegie Institute of Washington, Department of Terrestrial Magnetism,...
Significance: The Carnegie Institution of Washington, with funds provided by industrialist and philanthropist Andrew Carnegie, established the Department of Terrestrial Magnetism 9 DTM) in 1904 to survey and me... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Ricks Foundry, Miller Avenue off South Mount Vernon Street, Uniontown,...
Significance: Ricks manufactured the Covington coke puller, the most widely-used mechanical coke-drawing machine in the Connellsville Region. Survey number: HAER PA-366 Building/structure dates: ca. 1900 Init... More
Chicago River Bascule Bridge, West Cortland Street, Spanning North Bra...
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg... More
Shoaf Mine & Coke Works, East side of Shoaf, off Township Route 472, S...
See also HAER PA-283 for additional documentation. Includes drawings (sheets 5 & 6) & written data (pages 172 through 180). Significance: The Shoaf coke works is the most intact beehive-oven coke plant in Fayet... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Greensburg Railroad Station, Harrison Avenue, Greensburg, Westmoreland...
Significance: A principal stop on the mainline of the Pennsylvania Railroad, the Greensburg Station is now listed on the National Register. Survey number: HAER PA-249 Building/structure dates: 1910- 1911 I... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Griffin No. 1 Coke Works, Along Cats Run, Southeast of Masontown Bouro...
Significance: During peak production, Griffin No. 1 Coke Works operated one battery of double-block rectangular coke ovens. Sections of these ovens remain and are considered some of the best preserved rectangu... More
Royer House, Springfield Furnace, State Highway 866, .25 mile North of...
Significance: Built by the Royer family about 1810; John Royer settled in this area around 1805. Along with his brother Daniel, he established an iron furnace one-quarter mile to the south, on Piney Creek. The ... More
Greensburg Railroad Station, Harrison Avenue, Greensburg, Westmoreland...
Significance: A principal stop on the mainline of the Pennsylvania Railroad, the Greensburg Station is now listed on the National Register. Survey number: HAER PA-249 Building/structure dates: 1910- 1911 I... More
Chicago River Bascule Bridge, West Cortland Street, Spanning North Bra...
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg... More
Shoaf Mine & Coke Works, East side of Shoaf, off Township Route 472, S...
See also HAER PA-283 for additional documentation. Includes drawings (sheets 5 & 6) & written data (pages 172 through 180). Significance: The Shoaf coke works is the most intact beehive-oven coke plant in Fayet... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Carnegie Institute of Washington, Department of Terrestrial Magnetism,...
Significance: This building originally served as a foundry to cast nonferrous materials for tools, measuring instruments, and various fasteners and fittings used in magnetic observations undertaken the Carnegie... More
Royer House, Springfield Furnace, State Highway 866, .25 mile North of...
Significance: Built by the Royer family about 1810; John Royer settled in this area around 1805. Along with his brother Daniel, he established an iron furnace one-quarter mile to the south, on Piney Creek. The ... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Chicago River Bascule Bridge, West Cortland Street, Spanning North Bra...
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg... More
Carnegie Institute of Washington, Department of Terrestrial Magnetism,...
Significance: The Carnegie Institution of Washington, with funds provided by industrialist and philanthropist Andrew Carnegie, established the Department of Terrestrial Magnetism 9 DTM) in 1904 to survey and me... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Griffin No. 1 Coke Works, Along Cats Run, Southeast of Masontown Bouro...
Significance: During peak production, Griffin No. 1 Coke Works operated one battery of double-block rectangular coke ovens. Sections of these ovens remain and are considered some of the best preserved rectangu... More
Royer House, Springfield Furnace, State Highway 866, .25 mile North of...
Significance: Built by the Royer family about 1810; John Royer settled in this area around 1805. Along with his brother Daniel, he established an iron furnace one-quarter mile to the south, on Piney Creek. The ... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Chicago River Bascule Bridge, West Cortland Street, Spanning North Bra...
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Chicago River Bascule Bridge, West Cortland Street, Spanning North Bra...
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Chicago River Bascule Bridge, West Cortland Street, Spanning North Bra...
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Chicago River Bascule Bridge, West Cortland Street, Spanning North Bra...
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Wes...
Significance: One of several large steel making complexes in the Monongahela River Valley in southwestern Pennsylvania, the Pittsburgh Steel Company's Monessen Works grew from a rod and wire mill to a fully int... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Commonwealth Edison Company, Crawford Electrical Generating Station, 3...
Significance: The buildings of the Crawford Electric Generating Station were designed by the renowned architectural firm of Graham, Anderson, Probst and White; the Crawford Station also reflects the rapid expan... More
Carnegie Institute of Washington, Department of Terrestrial Magnetism,...
Significance: The Carnegie Institution of Washington, with funds provided by industrialist and philanthropist Andrew Carnegie, established the Department of Terrestrial Magnetism 9 DTM) in 1904 to survey and me... More