Catawissa Bridge, Spanning north branch of Susquehanna River, 3.5 mile...
Significance: The existing Catawissa Bridge, built in 1898 by the Pennsylvania Bridge Company of Beaver Falls, Pennsylvania, consists of four (4) steel through-truss spans, each 304 feet long, for a total lengt... More
Catawissa Bridge, Spanning north branch of Susquehanna River, 3.5 mile...
Significance: The existing Catawissa Bridge, built in 1898 by the Pennsylvania Bridge Company of Beaver Falls, Pennsylvania, consists of four (4) steel through-truss spans, each 304 feet long, for a total lengt... More
Kralltown Road Bridge, Spanning Bermudian Creek at Kralltown Road (Sta...
Significance: It was built in 1884 by the Wrought Iron Bridge Company, a leading 19th century bridge fabricator and builder. It is a double-intersection Pratt through truss, a representative truss type used for... More
Kralltown Road Bridge, Spanning Bermudian Creek at Kralltown Road (Sta...
Significance: It was built in 1884 by the Wrought Iron Bridge Company, a leading 19th century bridge fabricator and builder. It is a double-intersection Pratt through truss, a representative truss type used for... More
Gay Street Bridge, Spanning French Creek at Gay Street (State Route 11...
Significance: After its construction in 1926, the 12-span, reinforced concrete bridge was the longest such structure in Chester County. It is significant for the variety of span types and construction methods u... More
Phoenix Iron Company, Girder Shop No. 6, North of French Creek, west o...
Survey number: HAER PA-493-D Public domain photograph - historical image of Pennsylvania, United States, free to use, no copyright restrictions image - Picryl description
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Bridge over Little Pine Creek, State Route 1026 over Little Pine Creek...
Significance: The bridge is an early example of a reinforced concrete open-spandrel arch bridge, noteworthy for its modern method of construction, and unusual shape and design. The two ribs of the arch and the ... More
Bridge over Little Pine Creek, State Route 1026 over Little Pine Creek...
Significance: The bridge is an early example of a reinforced concrete open-spandrel arch bridge, noteworthy for its modern method of construction, and unusual shape and design. The two ribs of the arch and the ... More
Knight Bridge, Township Route 413 over Catawissa Creek, Mainville, Col...
Significance: The bridge was constructed in 1893 to carry traffic over Catawissa Creek. Built by the nationally significant King Iron and Bridge Company of Cleveland, Ohio, the Columbia County Bridge No. 44 is ... More
Allenwood Bridge, Spanning West Branch of Susquehanna River on State R...
Significance: Spanning the Susquehanna River at a long-established historic river crossing, the Allenwood Bridge is one of the oldest and longest spans crossing that river. Its builder, the Groton Bridge and M... More
Allenwood Bridge, Spanning West Branch of Susquehanna River on State R...
Significance: Spanning the Susquehanna River at a long-established historic river crossing, the Allenwood Bridge is one of the oldest and longest spans crossing that river. Its builder, the Groton Bridge and M... More
Pine Creek Bridge, Spanning Pine Creek at Messerall Road (Township Rou...
Significance: The bridge is an excellent example of a small wrought-iron bowstring truss. A prefabricated structure, it demonstrates the versatility of wrought iron and the speed with which it could be assemble... More
Pine Creek Bridge, Spanning Pine Creek at Messerall Road (Township Rou...
Significance: The bridge is an excellent example of a small wrought-iron bowstring truss. A prefabricated structure, it demonstrates the versatility of wrought iron and the speed with which it could be assemble... More
Larimer Avenue Bridge, Spanning Washington Boulevard at Larimer Avenue...
Significance: At the time of its construction, the bridge was the world's longest reinforced concrete arch span. The bridge was part of a large public works program in Pittsburgh responding to several reports c... More
Inclined Plane Bridge, Spanning Stonycreek River at State Route 3022 S...
Significance: This single-span, pin-connected Pennsylvania through truss bridge was constructed across the Stonycreek River in conjunction with an inclined plane railway shortly after the Johnstown Flood of 189... More
University Avenue Bridge, Spanning Schuylkill River at University Aven...
Significance: The bridge is significant for its association with noted Philadelphia architect Paul Phillipe Cret, who designed the bridge in collaboration with city engineers. Its exterior treatment reflects Cr... 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
Pennypack Creek Bridge, Spanning Pennypack Creek at Frankford Avenue (...
Significance: This three-span stone arch bridge is the oldest surviving roadway bridge in America. It was originally an important crossing along part of the King's Highway connecting Philadelphia to Bristol - o... More
Allentown Road Bridge, Spanning Skippack Creek on Allentown Road, Fran...
Significance: The Allentown Road Bridge is a representative example of a small span masonry arch bridge built for 19th century highway traffic in Pennsylvania. It exhibits a regional stylistic variation, simil... More
McConnell's Mill Bridge, Spanning Slippery Rock Creek at McConnell's M...
Significance: One of 4 extant Howe-truss covered bridges in Pennsylvania. It is the longest of these that has not been completely rebuilt. Erected originally to transport cargo from a grist mill, the bridge sti... More
Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislativ...
Significance: The existing Emlenton Bridge is significant in the areas of engineering and transportation, specifically for its age, size, type of truss, length of truss for this age, and material. The bridge w... More
Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislativ...
Significance: The existing Emlenton Bridge is significant in the areas of engineering and transportation, specifically for its age, size, type of truss, length of truss for this age, and material. The bridge w... More
Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislativ...
Significance: The existing Emlenton Bridge is significant in the areas of engineering and transportation, specifically for its age, size, type of truss, length of truss for this age, and material. The bridge w... More
Washingtonville Bridge, Pennsylvania Legislative Route 47036, spanning...
Significance: The Washingtonville Bridge is a small span Pratt pony truss, fabricated by the Phoenix Bridge Company for the New York firm of Dean & Westbrook. It is a typical example, although a rare survivor,... More
Washingtonville Bridge, Pennsylvania Legislative Route 47036, spanning...
Significance: The Washingtonville Bridge is a small span Pratt pony truss, fabricated by the Phoenix Bridge Company for the New York firm of Dean & Westbrook. It is a typical example, although a rare survivor,... More
Mead Avenue Bridge, Spanning French Creek at Mead Avenue, Meadville, C...
Significance: Mead Avenue, formerly Dock Street, bears the unusual distinction of having two bridges on the same site at one time. Grafted to the original double-intersection Whipple truss built by Penn Bridge... More
Mead Avenue Bridge, Spanning French Creek at Mead Avenue, Meadville, C...
Significance: Mead Avenue, formerly Dock Street, bears the unusual distinction of having two bridges on the same site at one time. Grafted to the original double-intersection Whipple truss built by Penn Bridge... More
Waterville Bridge, Spanning Swatara Creek at Appalachian Trail (moved ...
Significance: It is an example of a lenticular truss, so named because of the lens-like shape of its curved upper and lower chords. It is representative of the Berlin Iron Bridge Company's trademark bridge type... More
Waterville Bridge, Spanning Swatara Creek at Appalachian Trail (moved ...
Significance: It is an example of a lenticular truss, so named because of the lens-like shape of its curved upper and lower chords. It is representative of the Berlin Iron Bridge Company's trademark bridge type... More
Williams Road Bridge, Spanning Sugar Creek Middle Branch, Chapmanville...
Significance: Williams Road Bridge is a unique vernacular example of a late-nineteenth century pin-connected Pratt through truss adapted for re-use as a county bridge in the late twentieth century. It is of en... More
Williams Road Bridge, Spanning Sugar Creek Middle Branch, Chapmanville...
Significance: Williams Road Bridge is a unique vernacular example of a late-nineteenth century pin-connected Pratt through truss adapted for re-use as a county bridge in the late twentieth century. It is of en... More
Smithton Bridge, Spanning Youghiogheny River on State Road 981, Smitht...
Significance: The Smithton Bridge is the oldest remaining cantilever truss highway bridge in Pennsylvania. It is a typical example of the suspended span cantilever truss that was being built in the United Stat... More
Smithton Bridge, Spanning Youghiogheny River on State Road 981, Smitht...
Significance: The Smithton Bridge is the oldest remaining cantilever truss highway bridge in Pennsylvania. It is a typical example of the suspended span cantilever truss that was being built in the United Stat... More
South Street Bridge, Spans Pennsylvania Avenue, Wilkes-Barre Boulevard...
Significance: The South Street Bridge is an unusual, long span metropolitan bridge comprising thirteen concrete spans and two steel truss spans. While the concrete spans are representative, the trusses are unu... More
South Street Bridge, Spans Pennsylvania Avenue, Wilkes-Barre Boulevard...
Significance: The South Street Bridge is an unusual, long span metropolitan bridge comprising thirteen concrete spans and two steel truss spans. While the concrete spans are representative, the trusses are unu... More
South Street Bridge, Spans Pennsylvania Avenue, Wilkes-Barre Boulevard...
Significance: The South Street Bridge is an unusual, long span metropolitan bridge comprising thirteen concrete spans and two steel truss spans. While the concrete spans are representative, the trusses are unu... More
Brady Street Bridge, Spanning Monongahela River at South Twenty-second...
See also HABS PA-614 for additional documentation. Includes drawings. Significance: The Brady Street Bridge, contracted by the Schultz Bridge & Iron Co. of Pittsburgh, was a steel-riveted, through-highway bridg... More
Sewickley Bridge, Spanning Ohio River, Sewickley, Allegheny County, PA
Significance: The Bridge is representative of the type of bridge that was being built at the turn of the century. Also significant, because of the attention it had since its inception and resultant completion,... More
Sewickley Bridge, Spanning Ohio River, Sewickley, Allegheny County, PA
Significance: The Bridge is representative of the type of bridge that was being built at the turn of the century. Also significant, because of the attention it had since its inception and resultant completion,... More
Sewickley Bridge, Spanning Ohio River, Sewickley, Allegheny County, PA
Significance: The Bridge is representative of the type of bridge that was being built at the turn of the century. Also significant, because of the attention it had since its inception and resultant completion,... More
Sewickley Bridge, Spanning Ohio River, Sewickley, Allegheny County, PA
Significance: The Bridge is representative of the type of bridge that was being built at the turn of the century. Also significant, because of the attention it had since its inception and resultant completion,... More
Sewickley Bridge, Spanning Ohio River, Sewickley, Allegheny County, PA
Significance: The Bridge is representative of the type of bridge that was being built at the turn of the century. Also significant, because of the attention it had since its inception and resultant completion,... More
Sewickley Bridge, Spanning Ohio River, Sewickley, Allegheny County, PA
Significance: The Bridge is representative of the type of bridge that was being built at the turn of the century. Also significant, because of the attention it had since its inception and resultant completion,... More
Walnut Street Bridge, Spanning Susquehanna River at Walnut Street (Sta...
Significance: The bridge is a representative example of a late 19th century factory-manufactured roadway bridge. The bridge consists of 15 pin-connected wrought-iron Baltimore-type through-truss spans manufactu... More
Walnut Street Bridge, Spanning Susquehanna River at Walnut Street (Sta...
Significance: The bridge is a representative example of a late 19th century factory-manufactured roadway bridge. The bridge consists of 15 pin-connected wrought-iron Baltimore-type through-truss spans manufactu... More
Walnut Street Bridge, Spanning Susquehanna River at Walnut Street (Sta...
Significance: The bridge is a representative example of a late 19th century factory-manufactured roadway bridge. The bridge consists of 15 pin-connected wrought-iron Baltimore-type through-truss spans manufactu... 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
Bridge Street Bridge, Spanning Little French Creek at Bridge Street, U...
Significance: The Bridge Street Bridge over Little French Creek in Union City is a Through Pratt Truss metal bridge. It crosses Little French Creek immediately below a dam and mill pond that provided water po... More
Bridge Street Bridge, Spanning Little French Creek at Bridge Street, U...
Significance: The Bridge Street Bridge over Little French Creek in Union City is a Through Pratt Truss metal bridge. It crosses Little French Creek immediately below a dam and mill pond that provided water po... More
Bridge Street Bridge, Spanning Little French Creek at Bridge Street, U...
Significance: The Bridge Street Bridge over Little French Creek in Union City is a Through Pratt Truss metal bridge. It crosses Little French Creek immediately below a dam and mill pond that provided water po... More
Phoenix Iron Company, Foundry Building, Main Street at Mill Street, Ph...
Significance: Iron work began on the banks of French Creek in 1783 and continued, weathering massive changes in ferrous metalworking techniques, for 200 years. The foundry produced castings ancillary to the Pho... More
St. Anthony Street Bridge, Spanning Buffalo Creek, Legislative Route 5...
Significance: The St. Anthony Street Bridge is significant in the areas of engineering and transportation, specifically for its age, size, length of truss for this age, and builder. The Champion Bridge Company... More
Memorial Avenue Bridge, Spanning Lycoming Creek, Williamsport, Lycomin...
Significance: The Memorial Avenue Bridge is significant for its architectural and engineering features. Important original items that contribute to the bridge's integrity are the plaque, the latticed sidewalk ... More
Memorial Avenue Bridge, Spanning Lycoming Creek, Williamsport, Lycomin...
Significance: The Memorial Avenue Bridge is significant for its architectural and engineering features. Important original items that contribute to the bridge's integrity are the plaque, the latticed sidewalk ... More
Memorial Avenue Bridge, Spanning Lycoming Creek, Williamsport, Lycomin...
Significance: The Memorial Avenue Bridge is significant for its architectural and engineering features. Important original items that contribute to the bridge's integrity are the plaque, the latticed sidewalk ... More
Memorial Avenue Bridge, Spanning Lycoming Creek, Williamsport, Lycomin...
Significance: The Memorial Avenue Bridge is significant for its architectural and engineering features. Important original items that contribute to the bridge's integrity are the plaque, the latticed sidewalk ... More
Memorial Avenue Bridge, Spanning Lycoming Creek, Williamsport, Lycomin...
Significance: The Memorial Avenue Bridge is significant for its architectural and engineering features. Important original items that contribute to the bridge's integrity are the plaque, the latticed sidewalk ... 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
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
Soldiers' & Sailors' Memorial Bridge, Spanning Paxton Creek & Cameron ...
Significance: The bridge is an excellent example of a monumental bridge. Its militaristic decorative elements indicate its purpose as a memorial to all Pennsylvanians who have served in the armed forces. The ca... More
Soldiers' & Sailors' Memorial Bridge, Spanning Paxton Creek & Cameron ...
Significance: The bridge is an excellent example of a monumental bridge. Its militaristic decorative elements indicate its purpose as a memorial to all Pennsylvanians who have served in the armed forces. The ca... 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
Falls Bridge, Spanning Schuylkill River, connecting East & West River ...
Significance: The Falls Bridge is a unique and well-preserved example of the Petit through truss design, capable of carrying a roadway on both its upper and lower chords. The upper deck remains incomplete, but... More
Falls Bridge, Spanning Schuylkill River, connecting East & West River ...
Significance: The Falls Bridge is a unique and well-preserved example of the Petit through truss design, capable of carrying a roadway on both its upper and lower chords. The upper deck remains incomplete, but... 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
East Bloomsburg Bridge, Spanning Susquehanna River at Pennsylvania Rou...
Significance: The existing East Bloomsburg Bridge consists of six equal pin-connected through-truss spans of 190 foot length with two feet between end bearings at the piers for a total length of 1150 feet. The... More
College Avenue Bridge, Pennsylvania Route 58/ Legislative Route 82 spa...
Significance: The College Avenue Bridge in Greenville, Pennsylvania, is a simple pony truss bridge that spans the Little Shenango River on the northern side of Greenville, providing access to the Shenango Valle... More
College Avenue Bridge, Pennsylvania Route 58/ Legislative Route 82 spa...
Significance: The College Avenue Bridge in Greenville, Pennsylvania, is a simple pony truss bridge that spans the Little Shenango River on the northern side of Greenville, providing access to the Shenango Valle... More
Wilson Shute Bridge, Spanning French Creek at State Road 2008 (formerl...
Significance: The Wilson Shute Bridge is one of the many civil engineering landmarks that document Pennsylvania's rich historic transportation heritage. As an example of a steel Pratt through truss, it represe... More
Pleasantville Covered Bridge, Spanning Little Manatawny Creek at Cover...
Significance: One of five remaining covered wooden bridges in Berks County, the bridge is a contributing resource in the Oley Township Historic District. It is distinctive for its two-phase construction: an arc... More
Fayette County Bridge No. 103, Township Route 364, spanning Jacobs Cre...
Significance: The bridge is a significant example of a local metal truss bridge with important engineering characteristics evident in the metal truss and stone masonry abutments. Survey number: HAER PA-477 Bu... More
Catawissa Bridge, Spanning north branch of Susquehanna River, 3.5 mile...
Significance: The existing Catawissa Bridge, built in 1898 by the Pennsylvania Bridge Company of Beaver Falls, Pennsylvania, consists of four (4) steel through-truss spans, each 304 feet long, for a total lengt... More
Catawissa Bridge, Spanning north branch of Susquehanna River, 3.5 mile...
Significance: The existing Catawissa Bridge, built in 1898 by the Pennsylvania Bridge Company of Beaver Falls, Pennsylvania, consists of four (4) steel through-truss spans, each 304 feet long, for a total lengt... More
Catawissa Bridge, Spanning north branch of Susquehanna River, 3.5 mile...
Significance: The existing Catawissa Bridge, built in 1898 by the Pennsylvania Bridge Company of Beaver Falls, Pennsylvania, consists of four (4) steel through-truss spans, each 304 feet long, for a total lengt... More
Catawissa Bridge, Spanning north branch of Susquehanna River, 3.5 mile...
Significance: The existing Catawissa Bridge, built in 1898 by the Pennsylvania Bridge Company of Beaver Falls, Pennsylvania, consists of four (4) steel through-truss spans, each 304 feet long, for a total lengt... More
Kralltown Road Bridge, Spanning Bermudian Creek at Kralltown Road (Sta...
Significance: It was built in 1884 by the Wrought Iron Bridge Company, a leading 19th century bridge fabricator and builder. It is a double-intersection Pratt through truss, a representative truss type used for... More
Gay Street Bridge, Spanning French Creek at Gay Street (State Route 11...
Significance: After its construction in 1926, the 12-span, reinforced concrete bridge was the longest such structure in Chester County. It is significant for the variety of span types and construction methods u... More
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Kellams Bridge, Spanning Delaware River at Stalker-Kellams Road (State...
Significance: It is one of the few short-span wire-cable suspension bridges remaining in Pennsylvania. It was altered extensively in 1936. Unprocessed Field note material exists for this structure: N446 Surve... More
Old Brownsville Bridge, Spanning Monongahela River & Water Street at S...
Significance: The Pennsylvania truss bridge spans the Monongahela River between Brownsville and West Brownsville. The bridge is heavily constructed of built-up members and eye-bars, and is a significant landmar... More
South Eighth Street Viaduct, Spanning Little Lehigh Creek at Eighth St...
Significance: It is one of the earliest surviving example of "monumental" reinforced concrete construction. Initially planned in 1900 as a steel truss structure over the Little Lehigh Creek, the final result, b... More
Lower Bridge at English Center, Spanning Little Pine Creek at State Ro...
Significance: It is the only remaining bridge of two completed in 1891 to provide access to this once-important regional logging and tanning center. One of few surviving short-span roadway suspension bridges in... More
Bridge over Little Pine Creek, State Route 1026 over Little Pine Creek...
Significance: The bridge is an early example of a reinforced concrete open-spandrel arch bridge, noteworthy for its modern method of construction, and unusual shape and design. The two ribs of the arch and the ... More
Knight Bridge, Township Route 413 over Catawissa Creek, Mainville, Col...
Significance: The bridge was constructed in 1893 to carry traffic over Catawissa Creek. Built by the nationally significant King Iron and Bridge Company of Cleveland, Ohio, the Columbia County Bridge No. 44 is ... More
Franklin Street Bridge, Spanning Oil Creek at Franklin Street (State R...
Significance: Fires and floods during the early days of the oil industry promoted the frequent replacement of the bridge. The most recent, a tied plate-girder through arch designed by Crawford County Engineer K... More
Charleroi-Monessen Bridge, Spanning Monongahela River at State Route 2...
Significance: It is significant as a rare surviving example of a long, multiple-span metal truss bridge. Built as a toll bridge to carry vehicular, pedestrian, and trolley traffic across the Monongahela River, ... More
Larimer Avenue Bridge, Spanning Washington Boulevard at Larimer Avenue...
Significance: At the time of its construction, the bridge was the world's longest reinforced concrete arch span. The bridge was part of a large public works program in Pittsburgh responding to several reports c... More
Inclined Plane Bridge, Spanning Stonycreek River at State Route 3022 S...
Significance: This single-span, pin-connected Pennsylvania through truss bridge was constructed across the Stonycreek River in conjunction with an inclined plane railway shortly after the Johnstown Flood of 189... More
University Avenue Bridge, Spanning Schuylkill River at University Aven...
Significance: The bridge is significant for its association with noted Philadelphia architect Paul Phillipe Cret, who designed the bridge in collaboration with city engineers. Its exterior treatment reflects Cr... More
Nicholson Township Lenticular Bridge, Spanning Tunkhannock Creek at St...
Significance: It is a well-preserved example of a truss fabricated by the Corrugated Metal Company. Of special interest is how the company fabricated the pin connections at the end-posts and on the top chord...... 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
Monastery Road Bridge, Spanning Pennsylvania Railroad at Monastery Roa...
Significance: Monastery Road Bridge is a rare example of a pin-connected deck truss railroad bridge adapted for re-use as a roadway bridge. This site is of historical interest for its association with the Penn... 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