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
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... 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
Three Sisters Bridges, Seventh Street Bridge, Spanning Allegheny River...
Survey number: HAER PA-490-B Building/structure dates: 1924-1926 Initial Construction National Register of Historic Places NRIS Number: 86000018
Three Sisters Bridges, Seventh Street Bridge, Spanning Allegheny River...
Survey number: HAER PA-490-B Building/structure dates: 1924-1926 Initial Construction National Register of Historic Places NRIS Number: 86000018
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
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
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Three Sisters Bridges, Ninth Street Bridge, Spanning Allegheny River a...
Survey number: HAER PA-490-C Building/structure dates: 1924-1926 Initial Construction National Register of Historic Places NRIS Number: 86000019
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
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Ninth Street Bridge, Spanning Allegheny River a...
Survey number: HAER PA-490-C Building/structure dates: 1924-1926 Initial Construction National Register of Historic Places NRIS Number: 86000019
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
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Three Sisters Bridges, Ninth Street Bridge, Spanning Allegheny River a...
Survey number: HAER PA-490-C Building/structure dates: 1924-1926 Initial Construction National Register of Historic Places NRIS Number: 86000019
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
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
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Three Sisters Bridges, Seventh Street Bridge, Spanning Allegheny River...
Survey number: HAER PA-490-B Building/structure dates: 1924-1926 Initial Construction National Register of Historic Places NRIS Number: 86000018
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
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
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Liberty Bridge, Spanning Monongahela River, East Carson Street & Secon...
Significance: This was the longest and most expensive bridge built in Allegheny County when it was completed in 1928. The bridge links Pittsburgh's downtown area with the Liberty Tunnels, built through Mt. Wash... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... 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
Three Sisters Bridges, Seventh Street Bridge, Spanning Allegheny River...
Survey number: HAER PA-490-B Building/structure dates: 1924-1926 Initial Construction National Register of Historic Places NRIS Number: 86000018
Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River a...
Significance: The Three Sisters Bridges represent an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around federally-mandated clearances, aest... More