Railroad Overpass, Near Piquette Avenue, Detroit, Wayne County, MI
Survey number: HAER MI-354 Public domain photograph - historical image of Michigan, United States, free to use, no copyright restrictions image - Picryl description
Lehigh Canal, Lock 25, 800 feet south of Walnutport-Slatington Bridge,...
Significance: 22 by 100 foot lock constructed by the Lehigh Coal and Navigation Company. The third of seven locks (originally eight) in the four mile Section Three between the Lehigh Gap Dam and the outlet loc... More
Stevens Creek Bridge, Spanning Stevens Creek on Stevens Canyon Highway...
Significance: The Stevens Creek Bridge represents a transition in the park road bridges from standard reinforced concrete arches to arched girder designs. Its stone facing is characteristic of the National Par... More
Nisqually Glacier Bridge, Spanning Nisqually River at Nisqually Road, ...
Significance: The first bridge on the site was distinguished for its construction at the snout of the Nisqually Glacier; this made the Nisqually Road "the first road in America to reach a glacier." However, th... More
Obsidian Creek Bridge, Spanning Obsidian Creek at Indian Creek Campgro...
Significance: Obsidian Creek Bridge is one of two remaining Army Corps of Engineers bridges in Yellowstone National Park. It represents the significant role that the Corps of Engineers played in the early year... More
Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Historic Columbia River Highway, Oneonta Gorge Creek Bridge, Spanning ...
Significance: One of two nearly identical reinforced-concrete girder trestles on the Historic Columbia River Highway and one of four extant structures on the route that have a distinctive cap and arch concrete ... More
Congress Street Bascule Bridge, Spanning Fort Point Channel at Congres...
Significance: The Congress Street Bridge, built in 1930, is a trunnion bascule bridge and the most recent of the five movable-truss bridges spanning the Fort Point Channel. It replaced a steam operated swing d... More
Merritt Parkway, Comstock Hill Road Bridge, Spanning Merritt Parkway, ...
Significance: The bridges of the Merritt Parkway were predominately inspired by the Art Deco and Art Moderne architectural style of the 1930s. Experimental forming techniques were employed to create the orname... More
North Branch Quantico Creek Bridge, Prince William Forest Park, on NPS...
Significance: This bridge is representative of a common bridge type that became indigenous to the late nineteenth to early twentieth century landscape of America: a low Pratt pony metal truss bridge. The bridg... More
Harrison Avenue Bridge, Spanning Roaring Brook & Central Scranton Expr...
Significance: The bridge, a monumental structure spanning Roaring Brook between East and South Scranton, is a symbol of the city's progressive era in the early 20th century. A citizen's association formed to ad... More
Merritt Parkway, Redding Road Bridge, Spanning Merritt Parkway, Fairfi...
Significance: The bridges of the Merritt Parkway were predominately inspired by the Art Deco and Art Moderne architectural styles of the 1930s. Experimental forming techniques were employed to create the orname... More
Big Chickies Bridge, Spanning Big Chickies Creek, Lancaster Junction, ...
Significance: The tied-through reinforced concrete arch Big Chickies Bridge, built in 1916, is a historically and technologically significant early and rare example in the Commonwealth of Pennsylvania of a rain... More
Firehole River Bridge, Spanning Firehole River at Fountain Freight Roa...
Significance: This bridge is one of two remaining Army Corps of Engineers bridges in Yellowstone National Park. It represents the significant role that the Corps of Engineers played in the early years of road ... More
Firehole River Bridge, Spanning Firehole River at Fountain Freight Roa...
Significance: This bridge is one of two remaining Army Corps of Engineers bridges in Yellowstone National Park. It represents the significant role that the Corps of Engineers played in the early years of road ... More
Firehole River Bridge, Spanning Firehole River at Fountain Freight Roa...
Significance: This bridge is one of two remaining Army Corps of Engineers bridges in Yellowstone National Park. It represents the significant role that the Corps of Engineers played in the early years of road ... More
Hopewell Bridge, Spanning Little Sandy River, Hopewell, Greenup County...
Survey number: HAER KY-36 Public domain photograph - historical image of Kentucky, United States, free to use, no copyright restrictions image - Picryl description
Hopewell Bridge, Spanning Little Sandy River, Hopewell, Greenup County...
Survey number: HAER KY-36 Public domain photograph - historical image of Kentucky, United States, free to use, no copyright restrictions image - Picryl description
George Washington Bridge, Spanning Hudson River between Manhattan & Fo...
Significance: At the time of its construction, the George Washington Bridge was the longest span suspension bridge in the world. Survey number: HAER NY-129
George Washington Bridge, Spanning Hudson River between Manhattan & Fo...
Significance: At the time of its construction, the George Washington Bridge was the longest span suspension bridge in the world. Survey number: HAER NY-129
George Washington Bridge, Spanning Hudson River between Manhattan & Fo...
Significance: At the time of its construction, the George Washington Bridge was the longest span suspension bridge in the world. Survey number: HAER NY-129
George Washington Bridge, Spanning Hudson River between Manhattan & Fo...
Significance: At the time of its construction, the George Washington Bridge was the longest span suspension bridge in the world. Survey number: HAER NY-129
Philadelphia & Reading Railroad, Peacock's Lock Viaduct, Spanning Schu...
Significance: The Peacock's Lock Viaduct, named after a nearby lock on the Schuylkill Division Canal, may be the only masonry arch bridge in the U.S. with pierced spandrels. The circular openings between arche... 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
Hamilton Street Dam, Lehigh River upstream of Hamilton Street Bridge, ...
Significance: The Hamilton Street Dam is an integral part of the Lehigh Canal, which was of major economic importance in the development of industry in the Lehigh Valley in the nineteenth century. The V-shaped... More
Hamilton Street Dam, Lehigh River upstream of Hamilton Street Bridge, ...
Significance: The Hamilton Street Dam is an integral part of the Lehigh Canal, which was of major economic importance in the development of industry in the Lehigh Valley in the nineteenth century. The V-shaped... More
Hamilton Street Dam, Lehigh River upstream of Hamilton Street Bridge, ...
Significance: The Hamilton Street Dam is an integral part of the Lehigh Canal, which was of major economic importance in the development of industry in the Lehigh Valley in the nineteenth century. The V-shaped... More
Old Mill Road Bridge, Spanning Saucon Creek, Old Mill Road, Hellertown...
Significance: One of two existing pony-truss spans built by the Beckel Foundry. Both used variations of Francis C. Lowthorp's 23 June 1857 and 13 March 1860 patented cast lower-chord connections. The Old Mill... More
Old Mill Road Bridge, Spanning Saucon Creek, Old Mill Road, Hellertown...
Significance: One of two existing pony-truss spans built by the Beckel Foundry. Both used variations of Francis C. Lowthorp's 23 June 1857 and 13 March 1860 patented cast lower-chord connections. The Old Mill... More
Chicago River Bascule Bridge, LaSalle Street, Spanning Chicago River a...
Significance: The development of the Chicago trunnoin bascule bridge occurred during the first three decades of the twentieth century. Despite the controversy over patent infringement Joseph E. Strauss charg... More
Old Steel Bridge, Spanning Flathead River on Steel Bridge Road, Kalisp...
Significance: The Flathead River Bridge was the first large steel bridge constructed in northwestern Montana. As with many other late 19th century bridges, it replaces an earlier ferry operation. When complet... More
Old Steel Bridge, Spanning Flathead River on Steel Bridge Road, Kalisp...
Significance: The Flathead River Bridge was the first large steel bridge constructed in northwestern Montana. As with many other late 19th century bridges, it replaces an earlier ferry operation. When complet... More
Chicago Skyway Toll Bridge, Toll Plaza & Service Building, 8801 South ...
Significance: The Chicago Skyway toll plaza is an important eastern gateway to the city. The roadway sits atop an administrative and maintenance building, a uniquely compact arrangement dictated by its urban s... More
Elgin, Joliet & Eastern Railroad, Calumet River Bridge, Spanning Calum...
Survey number: HAER IL-149 Public domain photograph - historical image of Illinois, United States, free to use, no copyright restrictions image - Picryl description
Phoenix Iron Company, French Creek Bridge, Spanning French Creek betwe...
Unprocessed Field note material exists for this structure: N595 Survey number: HAER PA-493-B
Phoenix Iron Company, French Creek Bridge, Spanning French Creek betwe...
Unprocessed Field note material exists for this structure: N595 Survey number: HAER PA-493-B
Paradise River Second Crossing Bridge, Spanning Paradise River at Nara...
Significance: The Narada Cut-Off Bridge is the only surviving historic example in the park of a plain reinforced concrete girder bridge devoid of any specific details designed to harmonize with the landscape en... More
Merritt Parkway, Main Street/Route 110 Bridge, Spanning Main Street/Ro...
Significance: The bridges of the Merritt Parkway were predominately inspired by the Art Deco and Art Moderne architectural styles of the 1930s. Experimental forming techniques were employed to create the ornam... More
Chicago River Bascule Bridge, Wabash Avenue, Spanning Chicago River at...
Significance: In 1930 the Wabash Bridge was awarded the American Institute of Steel Construction prize for "Most Beautiful." Survey number: HAER IL-48 Building/structure dates: 1930 Initial Construction
North Pullayup River Bridge (Ruins), Formerly spanning North Pullayup ...
Survey number: HAER WA-77 Building/structure dates: 1934 Initial Construction Building/structure dates: ca. 1960 Subsequent Work
Snowden Bridge, Spanning Missouri River, Nohly, Richland County, MT
Survey number: HAER MT-27 Building/structure dates: 1913 Initial Construction Building/structure dates: 1925 Subsequent Work
Snowden Bridge, Spanning Missouri River, Nohly, Richland County, MT
Survey number: HAER MT-27 Building/structure dates: 1913 Initial Construction Building/structure dates: 1925 Subsequent Work
Snowden Bridge, Spanning Missouri River, Nohly, Richland County, MT
Survey number: HAER MT-27 Building/structure dates: 1913 Initial Construction Building/structure dates: 1925 Subsequent Work
Snowden Bridge, Spanning Missouri River, Nohly, Richland County, MT
Survey number: HAER MT-27 Building/structure dates: 1913 Initial Construction Building/structure dates: 1925 Subsequent Work
Christine Falls Bridge, Spanning Van Trump Creek on Nisqually Road, Lo...
Significance: The "rustic style" Christine Falls Bridge carries the Nisqually Road over the narrow box canyon of Van Trump Creek at Christine Falls. The graceful stone-faced reinforced concrete spandrel arch b... More
South Bridge, Spanning Jackson Park Lagoon at South Lake Shore Drive (...
Significance: In 1894, the South Park Commission, administrator of Chicago's south side park system, retained the Boston-area landscape architecture firm of Olmsted, Olmsted and Eliot to refurbish Jackson Park,... More
Fort Benton Bridge, Spanning Missouri River, Fort Benton, Chouteau Cou...
Significance: Fort Benton has a long history in Montana. It was s fur trading post before the formation of Montana territory. In order to hold the town's trade with the Judith Basin to the east from other compe... More
Stevens Canyon Highway, Between Paradise, WA, & State Highway 123, Ash...
Significance: The Stevens Canyon Highway was the last segment of the Mount Rainier National Park partial circuit road system to be constructed. Although not completed until 1957, the road features a number of ... More
Central Railroad of New Jersey, Bethlehem Station, South side of Lehig...
Significance: This one and one-half story brick mansard roofed station with canopy skirt supported by elaborate brackets on all four sides stands on the north side of the Central Railroad of New Jersey tracks i... More
South High Street Bridge, South High Street, spanning Little Juniata C...
Significance: The South High Street Bridge is one of four surviving lenticular truss bridges in the Commonwealth of Pennsylvania and one of fifty remaining in the United States. The truss derives its name from... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
Pennsylvania Railroad, Pickering Creek Trestle, Spanning Pickering Cre...
Significance: The trestle is significant as a high trestle with both horizontal and vertical curvature. Unprocessed Field note material exists for this structure: N596 Survey number: HAER PA-521 Building/str... More
Merritt Parkway, Lake Avenue Bridge, Spanning Merritt Parkway at 4.71 ...
Significance: The bridges of the Merritt Parkway were predominately inspired by the Art Deco and Art Moderne architectural styles of the 1930s. Experimental forming techniques were employed to create the ornam... More
Deer Creek Bridge, Spanning Deer Creek at East Side Highway, Longmire,...
Significance: The Deer Creek Bridge is one of the larger "rustic style" bridges in Mount Rainier National Park. The reinforced concrete semi-elliptical arch bridge is faced in native conglomerate, and the roug... More
Chow Chow Suspension Bridge, Spanning Quinault River, Taholah, Grays H...
Significance: The Chow Chow Suspension Bridge was constructed by Native Americans living on the Quinault Indian Reservation about 1950. It consists of four timber king post trusses that are suspended from stee... More
Mackinac Straights Suspension Bridge, Spanning Straight of Mackinac, M...
Survey number: HAER MI-329 Public domain photograph of port, ship docks, free to use, no copyright restrictions image - Picryl description
Dearborn River High Bridge, Spanning Dearborn River, Augusta, Lewis an...
Significance: The King Bridge Company of Cleveland, Ohio constructed this four-span, half-deck Pratt truss over the Dearborn River in 1897. The half-deck configuration of the bridge is unusual in that the floor... More
Dearborn River High Bridge, Spanning Dearborn River, Augusta, Lewis an...
Significance: The King Bridge Company of Cleveland, Ohio constructed this four-span, half-deck Pratt truss over the Dearborn River in 1897. The half-deck configuration of the bridge is unusual in that the floor... More
Pennsylvania Railroad, Whitford Bridge, Spanning Amtrak tracks at Whit...
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
Seitzville Road Bridge, Spanning South Branch Codorus Creek, Seitzvill...
Significance: Seitzville Road Bridge is the oldest extant reinforced concrete bridge in York County and an excellent example of early reinforced concrete arch bridge construction. The Nelson-Merydith Company o... More
Columbia River Gorge Bridge at Astoria, Spanning Columbia River at Ore...
Survey number: HAER OR-50 Public domain photograph - historical image of Oregon, United States, free to use, no copyright restrictions image - Picryl description
Pittsburgh & Lake Erie Railroad, Ohio River Bridge, Spanning Ohio Rive...
Significance: The bridge is significant for its relatively long and heavy cantilever truss, planned shortly before the Quebec cantilever bridge collapse of 1907. Rather than select a different design, the railr... More
Weaverland Bridge, Quarry Road spanning Conestoga Creek, Terre Hill, L...
Significance: The tied-through reinforced concrete arch Weaverland Bridge, built in 1916m, is a historically and technologically significant early and rare example in the State of Pennsylvania of a rainbow type... More
Nizina Bridge, Mile 8, Nizina Road, McCarthy, Valdez-Cordova Census Ar...
Significance: Part of the McCarthy-Nizina Road, with the purpose of providing a route to the Dan Creek, May Creek and Chititu mines, the Bridge was an expensive thorn in the side of the Alaska Road Commission a... More
Phoenix Iron Company, Administration Building, Bridge Street at Church...
Survey number: HAER PA-493-F Public domain photograph of a house, residential property, free to use, no copyright restrictions image - Picryl description
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-2, Spanning North ...
Significance: The Chicago, Milwaukee & St. Paul Railway's Bridge No. Z-2 is not only one of a few remaining swing bridges in Chicago, but is also of a rare asymmetrical or "bob-tail" type. The pivot pier is on... More
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-2, Spanning North ...
Significance: The Chicago, Milwaukee & St. Paul Railway's Bridge No. Z-2 is not only one of a few remaining swing bridges in Chicago, but is also of a rare asymmetrical or "bob-tail" type. The pivot pier is on... More
Birmingham Mineral Railroad Viaduct, Spanning Newfound Creek, Birmingh...
The location was changed from "Spanning King Creek" to "Spanning Newfound Creek" to more accurately reflect its location. "L&N Railroad Cane Creek Branch Trestle No. 10" was also added as a secondary name afte... More
Roundup Bridge, Spanning Musselshell River, Roundup, Musselshell Count...
Survey number: HAER MT-25 Building/structure dates: 1894 Building/structure dates: 1911
Roundup Bridge, Spanning Musselshell River, Roundup, Musselshell Count...
Survey number: HAER MT-25 Building/structure dates: 1894 Building/structure dates: 1911
Isa Lake Bridge, Spanning Isa Lake at Grand Loop Road, Lake, Teton Cou...
Significance: Isa Lake Bridge typifies the early design philosophy of the National Park Service, which was to use indigenous materials to harmonize man-made features with their natural surroundings. This philo... More
Main Channel Bridge, Spanning Clark Fork, Thompson Falls, Sanders Coun...
Survey number: HAER MT-28 Building/structure dates: 1911 Initial Construction
Big Conestoga Creek Bridge No. 12, Spanning Conestoga River at Farmers...
Significance: Big Conestoga Creek Bridge No. 12 is a rare combination of cantilever, arch and through-girder forms in reinforced concrete. Lancaster County engineer Frank H. Shaw, designing to meet economic co... More
St. Mary River Bridge & Siphon, Spanning St. Mary River, Babb, Glacier...
Significance: The Reclamation Act of 1902 authorized the U.S. Reclamation Service of the Department of the Interior to undertake numerous irrigation projects to make arid land farmable. One of those projects in... More
Swann Bridge, Spanning Locust Fork of Black Warrior River, Swann Bridg...
Significance: Swann Bridge is one of three surviving covered bridges in Blount County, Alabama, one of the last strongholds of covered bridge building in the United States. Survey number: HAER AL-201 Building... More
Chicago Skyway Toll Bridge, I-90, for 7.8 miles from South State Stree...
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its ... More
Chicago Skyway Toll Bridge, I-90, for 7.8 miles from South State Stree...
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its ... More
Chicago Skyway Toll Bridge, I-90, for 7.8 miles from South State Stree...
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its ... More
New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport,...
Locks E34 and E35 were surveyed as part of the 2009 New York State Barge Canal survey; see HAER Nos. NY-515 (Lock E34) and NY-516 (Lock E35). Significance: Locks 67-71 (north flight) comprise a rare 19th-centur... More
Colonial Parkway, C&O Railroad Underpass, Milepost 12.54 of Colonial P...
Significance: The C&O Railroad Underpass represents a typical 1930s brick-faced arch reinforced concrete bridge constructed on the Colonial Parkway. Charles Peterson based his design of this bridge on the 1860... More
Wiconisco Canal Aqueduct No. 3, Spanning Powell Creek at State Route 1...
Significance: Originally a component of the Pennsylvania Canal system, this aqueduct was the largest bridge on the state-initiated and privately completed Wiconisco Canal. Hewn from the foot of Peter's Mountain... More
Tongue River Bridge, Spanning Tongue River, Miles City, Custer County,...
Significance: The bridge was erected in 1897 by W.S. Hewett & Co. of Minneapolis, Minnesota. The bridge is the oldest existing steel highway bridge in eastern Montana and its main span is similar to the main sp... More
Baltimore & Ohio Railroad, Mount Clare Shops, South side of Pratt Stre...
Significance: Mount Clare Shops were the earliest railroad shops in the western hemisphere, if not the world. The B & O had a facility at this site since 1829. At its height, it was the most comprehensive, se... More
Baltimore & Ohio Railroad, Mount Clare Shops, South side of Pratt Stre...
Significance: Mount Clare Shops were the earliest railroad shops in the western hemisphere, if not the world. The B & O had a facility at this site since 1829. At its height, it was the most comprehensive, se... More
Western Maryland Railway, Cumberland Extension, Pearre to North Branch...
Significance: The westward expansion of the Western Maryland Railway, beginning with the Cumberland Extension, was one of the last new mainlines constructed during the U.S. railroads' period of extensive growth... More
Western Maryland Railway, Cumberland Extension, Pearre to North Branch...
Significance: The westward expansion of the Western Maryland Railway, beginning with the Cumberland Extension, was one of the last new mainlines constructed during the U.S. railroads' period of extensive growth... More
Western Maryland Railway, Cumberland Extension, Pearre to North Branch...
Significance: The westward expansion of the Western Maryland Railway, beginning with the Cumberland Extension, was one of the last new mainlines constructed during the U.S. railroads' period of extensive growth... More
Western Maryland Railway, Cumberland Extension, Pearre to North Branch...
Significance: The westward expansion of the Western Maryland Railway, beginning with the Cumberland Extension, was one of the last new mainlines constructed during the U.S. railroads' period of extensive growth... More
Merritt Parkway, Round Hill Road Bridge, Spanning Merritt Parkway at 3...
Significance: The bridges of the Merritt Parkway were predominately inspired by the Art Deco and Art Moderne architectural styles of the 1930s. Experimental forming techniques were employed to create the ornam... More
Merritt Parkway, Round Hill Road Bridge, Spanning Merritt Parkway at 3...
Significance: The bridges of the Merritt Parkway were predominately inspired by the Art Deco and Art Moderne architectural styles of the 1930s. Experimental forming techniques were employed to create the ornam... More
Center Street Bridge, Spanning Conneat Creek, Conneautville, Crawford ...
Significance: Center Street Bridge is an unusually ornate example of a late-nineteenth century, pin-connected Pratt through truss roadway bridge. It is one of four surviving Crawford County bridges built by th... More
Coram Bridge, Spanning Flathead River, Coram, Flathead County, MT
Significance: This two-span, pin-connected, Baltimore dock truss bridge across the Flat River is approached from either direction by plate girder spans between trestles. The two Baltimore spans are 230' in leng... More
Coram Bridge, Spanning Flathead River, Coram, Flathead County, MT
Significance: This two-span, pin-connected, Baltimore dock truss bridge across the Flat River is approached from either direction by plate girder spans between trestles. The two Baltimore spans are 230' in leng... More
Coram Bridge, Spanning Flathead River, Coram, Flathead County, MT
Significance: This two-span, pin-connected, Baltimore dock truss bridge across the Flat River is approached from either direction by plate girder spans between trestles. The two Baltimore spans are 230' in leng... More
Merritt Parkway, Guinea Road Bridge, Spanning Merritt Parkway, Stamfor...
Significance: The bridges of the Merritt Parkway were predominately inspired by the Art Deco and Art Moderne architectural styles of the 1930s. Experimental forming techniques were employed to create the ornam... More
Merritt Parkway, Guinea Road Bridge, Spanning Merritt Parkway, Stamfor...
Significance: The bridges of the Merritt Parkway were predominately inspired by the Art Deco and Art Moderne architectural styles of the 1930s. Experimental forming techniques were employed to create the ornam... More
Philadelphia & Reading Railroad, Susquehanna River Bridge, Spanning Su...
Significance: The structure is significant as a late example of a reinforced concrete arch design by the Philadelphia & Reading Railroad, and perhaps the longest such structure on the former P&R system. Its des... More