Pennsylvania Railroad, Brilliant Cut-Off, South Wye, Linden Avenue at ...
Significance: This structure is significant for its association with the Pennsylvania Railroad's Brilliant Cut-Off, a bypass through residential neighborhoods around downtown Pittsburgh. The elevated south wye ... More
Frankford Avenue Bridge over Poquessing Creek, Spanning Poquessing Cre...
See also HAER PA-478 for related documentation. Includes written data. Significance: This single-span, closed-spandrel arch bridge is an early example of a concrete bridge with supporting members. The bridge's ... More
Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...
Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More
Frankford Avenue Bridge over Poquessing Creek, Spanning Poquessing Cre...
See also HAER PA-478 for related documentation. Includes written data. Significance: This single-span, closed-spandrel arch bridge is an early example of a concrete bridge with supporting members. The bridge's ... More
Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...
Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More
Frankford Avenue Bridge over Poquessing Creek, Spanning Poquessing Cre...
See also HAER PA-478 for related documentation. Includes written data. Significance: This single-span, closed-spandrel arch bridge is an early example of a concrete bridge with supporting members. The bridge's ... More
Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...
Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More
Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...
Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More
Frankford Avenue Bridge over Poquessing Creek, Spanning Poquessing Cre...
See also HAER PA-478 for related documentation. Includes written data. Significance: This single-span, closed-spandrel arch bridge is an early example of a concrete bridge with supporting members. The bridge's ... More
Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, ...
Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individ... More
Frankford Avenue Bridge over Poquessing Creek, Spanning Poquessing Cre...
See also HAER PA-478 for related documentation. Includes written data. Significance: This single-span, closed-spandrel arch bridge is an early example of a concrete bridge with supporting members. The bridge's ... More
Frankford Avenue Bridge over Poquessing Creek, Spanning Poquessing Cre...
See also HAER PA-478 for related documentation. Includes written data. Significance: This single-span, closed-spandrel arch bridge is an early example of a concrete bridge with supporting members. The bridge's ... More
Frankford Avenue Bridge over Poquessing Creek, Spanning Poquessing Cre...
See also HAER PA-478 for related documentation. Includes written data. Significance: This single-span, closed-spandrel arch bridge is an early example of a concrete bridge with supporting members. The bridge's ... More
Frankford Avenue Bridge over Poquessing Creek, Spanning Poquessing Cre...
See also HAER PA-478 for related documentation. Includes written data. Significance: This single-span, closed-spandrel arch bridge is an early example of a concrete bridge with supporting members. The bridge's ... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Mill Creek Bridge, Spanning Mill Creek at River Street (State Route 20...
Significance: This filled-spandrel stone arch bridge is distinguished by its 39' span over Mill Creek with an impressive 32'10" clear height. Unusual corbels at the spring line, used to support temporary center... More
Mill Creek Bridge, Spanning Mill Creek at River Street (State Route 20...
Significance: This filled-spandrel stone arch bridge is distinguished by its 39' span over Mill Creek with an impressive 32'10" clear height. Unusual corbels at the spring line, used to support temporary center... More
Mill Creek Bridge, Spanning Mill Creek at River Street (State Route 20...
Significance: This filled-spandrel stone arch bridge is distinguished by its 39' span over Mill Creek with an impressive 32'10" clear height. Unusual corbels at the spring line, used to support temporary center... More
Mill Creek Bridge, Spanning Mill Creek at River Street (State Route 20...
Significance: This filled-spandrel stone arch bridge is distinguished by its 39' span over Mill Creek with an impressive 32'10" clear height. Unusual corbels at the spring line, used to support temporary center... More
Mill Creek Bridge, Spanning Mill Creek at River Street (State Route 20...
Significance: This filled-spandrel stone arch bridge is distinguished by its 39' span over Mill Creek with an impressive 32'10" clear height. Unusual corbels at the spring line, used to support temporary center... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Rush's Mill Bridge, Spanning Plum Creek at North end of Union Canal Bi...
Significance: Rush's Mill Bridge is one of a small number of composite cast- and wrought-iron bridges yet remaining in the U.S. It is also one of the few existing examples employing the Howe-truss form in whic... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Columbia-Wrightsville Bridge, Spanning Susquehanna River at Lincoln Hi...
Significance: When it was dedicated on Armistice Day, 1930, the bridge was the longest multiple-arch concrete bridge in the world. 28 three-ribbed open-spandrel reinforced concrete arches, carry the bridge acro... More
Philadelphia & Reading Railroad, Flat Rock Tunnel, Beneath Flat Rock H...
Significance: It is one of the earliest railroad tunnels built in America. The Philadelphia & Reading Railroad made significant contributions to America's transportation history and the history of the anthracit... More
Philadelphia & Reading Railroad, Flat Rock Tunnel, Beneath Flat Rock H...
Significance: It is one of the earliest railroad tunnels built in America. The Philadelphia & Reading Railroad made significant contributions to America's transportation history and the history of the anthracit... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Pennsylvania Railroad, Mount Union Bridge, Spanning Juniata River, nor...
Significance: The bridge is significant as an example of the Pennsylvania Railroad's prolific stone arch bridge construction during the early 20th century. In addition, it elegantly breaks classical aesthetic r... More
Pennsylvania Railroad, Mount Union Bridge, Spanning Juniata River, nor...
Significance: The bridge is significant as an example of the Pennsylvania Railroad's prolific stone arch bridge construction during the early 20th century. In addition, it elegantly breaks classical aesthetic r... More
Pennsylvania Railroad, Mount Union Bridge, Spanning Juniata River, nor...
Significance: The bridge is significant as an example of the Pennsylvania Railroad's prolific stone arch bridge construction during the early 20th century. In addition, it elegantly breaks classical aesthetic r... More
Pennsylvania Railroad, Mount Union Bridge, Spanning Juniata River, nor...
Significance: The bridge is significant as an example of the Pennsylvania Railroad's prolific stone arch bridge construction during the early 20th century. In addition, it elegantly breaks classical aesthetic r... More
Little Conewago Creek Bridge, Spanning South Branch of Conewago Creek ...
Significance: It was constructed on the site of the first publicly funded bridge in Adams County (then part of York County). A series of structures at this location have aided commercial development, giving acc... More
Little Conewago Creek Bridge, Spanning South Branch of Conewago Creek ...
Significance: It was constructed on the site of the first publicly funded bridge in Adams County (then part of York County). A series of structures at this location have aided commercial development, giving acc... More
Little Conewago Creek Bridge, Spanning South Branch of Conewago Creek ...
Significance: It was constructed on the site of the first publicly funded bridge in Adams County (then part of York County). A series of structures at this location have aided commercial development, giving acc... More
Little Conewago Creek Bridge, Spanning South Branch of Conewago Creek ...
Significance: It was constructed on the site of the first publicly funded bridge in Adams County (then part of York County). A series of structures at this location have aided commercial development, giving acc... More
Little Conewago Creek Bridge, Spanning South Branch of Conewago Creek ...
Significance: It was constructed on the site of the first publicly funded bridge in Adams County (then part of York County). A series of structures at this location have aided commercial development, giving acc... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Upper Bridge at Slate Run, Spanning Pine Creek at State Route 414, Sla...
See also HAER PA-478 for related documentation. Includes written data. Significance: The bridge is a lattice truss, and unusual truss type that was built in the U.S. from about 1857 to the 1890s. Riveting all t... More
Schenley Park Bridge over Panther Hollow, Spanning Panther Hollow at P...
Significance: The bridge includes design elements from the City Beautiful movement while utilizing Pittsburgh's "native" industry: steel. An elegant three-hinged steel arch, the bridge is a contributing structu... More
Schenley Park Bridge over Panther Hollow, Spanning Panther Hollow at P...
Significance: The bridge includes design elements from the City Beautiful movement while utilizing Pittsburgh's "native" industry: steel. An elegant three-hinged steel arch, the bridge is a contributing structu... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More
Pennsylvania Railroad, 52nd Street Bridge, North Fifty-second Street a...
Significance: The bridge's main span, a pin-connected Parker through truss, is an exceptionally long example of its type. Its length surpasses the practical limit of 300', beyond which a subdivided Pennsylvania... More