Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
Pithole Stone Arch Bridge, Spanning Pithole Creek at Eagle Rock Road (...
Significance: It is significant as a late 19th century example of a rural masonry bridge constructed at a time when most of its counterparts were built in the more common metal truss types. Although considered ... More
Pithole Stone Arch Bridge, Spanning Pithole Creek at Eagle Rock Road (...
Significance: It is significant as a late 19th century example of a rural masonry bridge constructed at a time when most of its counterparts were built in the more common metal truss types. Although considered ... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
Pithole Stone Arch Bridge, Spanning Pithole Creek at Eagle Rock Road (...
Significance: It is significant as a late 19th century example of a rural masonry bridge constructed at a time when most of its counterparts were built in the more common metal truss types. Although considered ... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
Pithole Stone Arch Bridge, Spanning Pithole Creek at Eagle Rock Road (...
Significance: It is significant as a late 19th century example of a rural masonry bridge constructed at a time when most of its counterparts were built in the more common metal truss types. Although considered ... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
Pithole Stone Arch Bridge, Spanning Pithole Creek at Eagle Rock Road (...
Significance: It is significant as a late 19th century example of a rural masonry bridge constructed at a time when most of its counterparts were built in the more common metal truss types. Although considered ... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
Pithole Stone Arch Bridge, Spanning Pithole Creek at Eagle Rock Road (...
Significance: It is significant as a late 19th century example of a rural masonry bridge constructed at a time when most of its counterparts were built in the more common metal truss types. Although considered ... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
McKee's Rocks Bridge, Spanning Ohio River at Chartiers Avenue (State R...
Significance: The bridge is an outstanding example of a long-span metal through arch bridge constructed by Allegheny County as part of an intensive bridge-building campaign during the late 1920s and early 1930s... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More
Maclay's Mill Twin Bridge (East & West), Spanning Conodoguinet Creek a...
Significance: The bridges are outstanding examples of surviving stone arch bridges constructed by a 19th century designer craftsperson. Before the appearance of professional engineers and architects during the ... More
Washington Crossing Bridge, Spanning Allegheny River at Fortieth Stree...
See also HABS PA-1179 for additional documentation. Includes drawings. Significance: The bridge is an outstanding example of a long-span metal deck arch bridge. Its unique architectural details, forged in a suc... More
George Westinghouse Bridge, Spanning Turtle Creek at Lincoln Highway (...
Significance: Hailed as "America's Longest Concrete-Arch Bridge" when it opened in 1932, the bridge's main span remains one of the longest concrete arch spans in the U.S. This structure represents the highest e... More