Manzanola Bridge, State Highway 207, spanning Arkansas River, Manzanol...
Significance: The bridge has functioned as a locally important crossing over the two greatest rivers in Colorado: the Colorado and the Arkansas. It is one of the earliest rigid-connected vehicular trusses in Co... More
Medicine Bow Bridge, Spanning Medicine Bow River on County Road No. 12...
At the time of the 1981-2 survey, the bridge's address was given as "Spanning Medicine Bow River on County Road No. 120-1." Per the 2015 addendum, roads within Carbon County were renumbered in the 1980s. The a... More
Fifth Street Bridge, U.S. 50 at Colorado River, Grand Junction, Mesa C...
Survey number: HAER CO-41 Public domain photograph - historical image of Colorado, 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
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
Bridgeport Bridge, Spanning Wisconsin River at U.S. Highway 18, Bridge...
Significance: In 1983, the Bridgeport Bridge, comprised of seven truss spans, was one of five remaining Pennsylvania trusses in the State of Wisconsin. However in the subsequent ten years, four of these uncomm... More
Rock Creek Bridge, Shoshone Street West spanning Rock Creek, Twin Fall...
Significance: The Rock Creek Bridge is exceptionally unique as one of only two viaduct-type highway bridges in the Idaho State Bridge Inventory. / In a historical context, the structure reflects the vast improv... More
Rock Creek Bridge, Shoshone Street West spanning Rock Creek, Twin Fall...
Significance: The Rock Creek Bridge is exceptionally unique as one of only two viaduct-type highway bridges in the Idaho State Bridge Inventory. / In a historical context, the structure reflects the vast improv... More
Edgefield County Bridge No. 3, Road S-63 spanning Log Creek, Pleasant ...
Significance: Of the approximately 137 metal truss bridges known to exist in South Carolina, this structure is one of the 66 Pratt through truss bridges listed in the South Carolina Metal Truss Highway Bridge I... 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
Morse Near Bridge, Spanning North Branch of Pentwater River, Pentwater...
Significance: The bridge is a single-span steel, riveted Warren Pony Truss built according to Michigan State Highway Department standard plans, fabricated by the Groton Bridge Company of Groton, New York. It is... More
Morse Near Bridge, Spanning North Branch of Pentwater River, Pentwater...
Significance: The bridge is a single-span steel, riveted Warren Pony Truss built according to Michigan State Highway Department standard plans, fabricated by the Groton Bridge Company of Groton, New York. It is... More
Pittsburgh, Fort Wayne & Chicago Railway, Beaver River Bridge, Spannin...
Significance: The bridge includes several unusually shallow and heavy skewed Warren deck trusses. The interesting and well-documented history of this crossing includes a rare instance of highway and railroad br... More
Grassmere Road Bridge, Spanning Pinnebog River, Caseville, Huron Count...
Significance: With a total bridge length of 21.9m (72'), it is an unusual for a Pratt Pony Truss bridge to be this long. Survey number: HAER MI-85
Reliance Bridge, Spanning Hiwassee River on State Route 315, Reliance,...
Significance: The Reliance is a representative example of the Pratt through truss. It is the only existing bridge in Tennessee known to have been built by the Roanoke Bridge Company. Also, it is a contributin... More
Reliance Bridge, Spanning Hiwassee River on State Route 315, Reliance,...
Significance: The Reliance is a representative example of the Pratt through truss. It is the only existing bridge in Tennessee known to have been built by the Roanoke Bridge Company. Also, it is a contributin... More
South Fork Trinity River Bridge, State Highway 299 spanning South Fork...
Significance: The South Fork Trinity River Bridge is one of a very limited number of cantilever truss highway bridges in California. Best suited to specific terrain conditions such as deep canyons to be crosse... More
South Fork Trinity River Bridge, State Highway 299 spanning South Fork...
Significance: The South Fork Trinity River Bridge is one of a very limited number of cantilever truss highway bridges in California. Best suited to specific terrain conditions such as deep canyons to be crosse... More
Missouri River Bridge, Spanning Missouri River on County Road 200, Hul...
Significance: The Missouri River Bridge is unique for its type in Wyoming. This eight-panel, Pratt Pony truss bridge lacks inclined end posts. It is an interesting variation for a vehicular bridge in the Stat... More
Austin Peay Bridge, State Route 56 spanning Cumberland River, Gainesbo...
Significance: The bridge is the only known extant K-truss in the Federal Highway Administration's Southeast Region. The bridge also is historically significant for its associations with the early development of... More
Twenty Mile Road Bridge, Spanning St. Joseph River on Twenty Mile Road...
Significance: The 20 Mile Road Bridge is a large and early example of a riveted pony truss structure with no pinned connections. It is all the more unusual for its Pratt rather than Warren truss design because... More
One Hundred Thirty-Third Avenue Bridge, Spanning Rabbit River, Hopkins...
Significance: The 133rd Avenue Bridge is a four-panel half-hip pin-connected Pratt steel truss. The bridge has withstood its environment for many years, having been built in 1897. It has been considered eligi... More
One Hundred Thirty-Third Avenue Bridge, Spanning Rabbit River, Hopkins...
Significance: The 133rd Avenue Bridge is a four-panel half-hip pin-connected Pratt steel truss. The bridge has withstood its environment for many years, having been built in 1897. It has been considered eligi... More
South County Line Road Bridge, Spanning Flat River, Greenville, Montca...
Significance: The South County Line Road Bridge is a Pratt through truss with pinned connections. The bridge has withstood it environment for many years, having been built in 1880. It has been considered elig... More
Swink Bridge, Spanning Arkansas River (County Road 24.5), Swink, Otero...
Survey number: HAER CO-37 Building/structure dates: 1912 Initial Construction National Register of Historic Places NRIS Number: NR
Roundup Bridge, Spanning Musselshell River, Roundup, Musselshell Count...
Survey number: HAER MT-25 Building/structure dates: 1894 Building/structure dates: 1911
Meadow Hill Drive Bridge, Spanning Wilson Creek, Menomonie, Dunn Count...
Significance: The Meadow Hill Drive Bridge is an excellent example of a steel, riveted, Parker overhead truss designed by the Wisconsin State Highway Commission during the period 1911 to 1925. During these yea... More
West End-North Side Bridge, Spanning Ohio River, approximately 1 mile ...
Photographs cover approach spans only; Ohio River span not shown. Significance: After two decades of agitation by the local business community, the West End-North Side Bridge was completed in 1932 by the Americ... More
West End-North Side Bridge, Spanning Ohio River, approximately 1 mile ...
Photographs cover approach spans only; Ohio River span not shown. Significance: After two decades of agitation by the local business community, the West End-North Side Bridge was completed in 1932 by the Americ... More
Deansbury Bridge, Spanning South Platte River, Waterton, Jefferson Cou...
Significance: It is a riveted single-span Warren through truss. It was built as a narrow gauge, railroad bridge for the Denver, South Park and Pacific Railroad and it is presently used as an access road bridge.... More
Deansbury Bridge, Spanning South Platte River, Waterton, Jefferson Cou...
Significance: It is a riveted single-span Warren through truss. It was built as a narrow gauge, railroad bridge for the Denver, South Park and Pacific Railroad and it is presently used as an access road bridge.... 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
Smithfield Street Bridge, Spanning Monongahela River on Smithfield Str...
Significance: Designed by Gustav Lindenthal, one of America's most famous bridge engineers, as a two-lane bridge. One lane was erected in 1883, and another was added in 1891. The span is Pittsburgh's most gra... More
Smithfield Street Bridge, Spanning Monongahela River on Smithfield Str...
Significance: Designed by Gustav Lindenthal, one of America's most famous bridge engineers, as a two-lane bridge. One lane was erected in 1883, and another was added in 1891. The span is Pittsburgh's most gra... More
Burroughs Street Bridge, Spanning Flat River, Lowell, Kent County, MI
Address changed from "Spanning the Flat River at Burroughs Drive, Lowell vic., Kent County, Michigan" to "Spanning Looking Glass river on Portland Riverwalk, Portland, Ionia County, Michigan" because the bridge... More
Burroughs Street Bridge, Spanning Flat River, Lowell, Kent County, MI
Address changed from "Spanning the Flat River at Burroughs Drive, Lowell vic., Kent County, Michigan" to "Spanning Looking Glass river on Portland Riverwalk, Portland, Ionia County, Michigan" because the bridge... More
State Highway Bridge No. 16, Spanning Kickapoo River, La Farge, Vernon...
Significance: Bridge No. 16 was significant for its Warren truss design features, as well as for its role in the history of transportation in the Upper Midwest. Survey number: HAER WI-64 Building/structure da... More
Chelyan Bridge, Spanning Kanawha River at U.S. Route 61 spur, Chelyan,...
Significance: This bridge, spanning the Kanawha River at Chelyan, was constructed in 1928-29. The construction of the bridge showed how the volume of traffic increased as advances were made in the automobile i... More
Hassler Bridge, Spanning Obey River at State Route 42, Byrdstown, Pick...
Significance: The bridge is a late example of metal truss design, which was a standard of the Tennessee Highway Department since 1920. The bridge is also a tangible artifact of the lifestyle and economic change... More
Shaytown Road Bridge, Spanning Thornapple River, Vermontville, Eaton C...
Significance: The Shaytown Road Bridge is a Warren through truss structure. It is one of only two known structures of this type in Michigan. It is the only Warren truss in Michigan utilizing pin-connections, ... More
Shaytown Road Bridge, Spanning Thornapple River, Vermontville, Eaton C...
Significance: The Shaytown Road Bridge is a Warren through truss structure. It is one of only two known structures of this type in Michigan. It is the only Warren truss in Michigan utilizing pin-connections, ... More
Burt Road Bridge, Spanning east fork of west branch of St. Joseph of M...
Significance: The Burt Road Bridge is the only known surviving example of a Michigan bridge built by the Ohio Bridge Company of Toledo, Ohio. This firm was one of many short lived bridge companies that operate... More
Grasmere Avenue Bridge, Spanning Railroad at Grasmere Avenue, Fairfiel...
Survey number: HAER CT-15 Public domain photograph - historical image of Connecticut, United States, free to use, no copyright restrictions image - Picryl description
North Park Bridge, Spanning Grand River at North Park Street, Grand Ra...
Significance: The North Park Bridge is the second longest through Pratt truss bridge of its kind in Michigan. It has been officially determined to be eligible for listing in the National Register of Historic P... 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
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
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
Custer Road Bridge, Spanning Black River Drain, Carsonville, Sanilac C...
Significance: With a main span of 27.52m (90.3 feet), this is among the longest known surviving Warren pony truss bridges in Michigan, since only fifteen percent of the total exceed eighty feet. Survey number:... More
Custer Road Bridge, Spanning Black River Drain, Carsonville, Sanilac C...
Significance: With a main span of 27.52m (90.3 feet), this is among the longest known surviving Warren pony truss bridges in Michigan, since only fifteen percent of the total exceed eighty feet. Survey number:... More
Castle Garden Bridge, Township Route 343 over Bennetts Branch of Sinne...
Significance: The bridge is a two-span, pin-connected, metal Pratt through truss bridge 212' in length. Erected by Nelson and Buchanan of Chambersburg , Pennsylvania, in 1901, with some members fabricated by th... More
Landing Bridge, Spanning Raritan River at Landing Lane, New Brunswick,...
Significance: Landing Bridge is a representative example of late-nineteenth-century bridge design and construction, featuring Pratt trusses and riveted connections. The bridge was designed by George F. Blakely... More
Landing Bridge, Spanning Raritan River at Landing Lane, New Brunswick,...
Significance: Landing Bridge is a representative example of late-nineteenth-century bridge design and construction, featuring Pratt trusses and riveted connections. The bridge was designed by George F. Blakely... More
Bert Parsons Bridge, Spanning Fisher River at West Fisher Drive, Corne...
Significance: The Bert Parsons Bridge is an excellent example of a steel, rigid-connected, Pratt through truss designed by the Wisconsin State Highway Commission. Constructed in 1914, it is one of the first br... More
Benson Bridge, Spanning Cutler Reservoir, Benson, Cache County, UT
Significance: The Benson Bridge is a steel through Pratt truss bridge. It is one of only 53 remaining truss bridges in Utah and one of only three remaining pin connected truss bridges left in Utah. It is also... More
Hobbs Bridge, Spanning Elk River on Curtis Road (A494), Coldwater, Lin...
Significance: The bridge is the only known surviving Baltimore Petit truss bridge in Tennessee. Survey number: HAER TN-23 Building/structure dates: 1891 Initial Construction
Hobbs Bridge, Spanning Elk River on Curtis Road (A494), Coldwater, Lin...
Significance: The bridge is the only known surviving Baltimore Petit truss bridge in Tennessee. Survey number: HAER TN-23 Building/structure dates: 1891 Initial Construction
Hobbs Bridge, Spanning Elk River on Curtis Road (A494), Coldwater, Lin...
Significance: The bridge is the only known surviving Baltimore Petit truss bridge in Tennessee. Survey number: HAER TN-23 Building/structure dates: 1891 Initial Construction
Jones Road Bridge, Spanning Grand River, Eagle, Clinton County, MI
Significance: The bridge is part of Clinton County's local road system which primarily serves existing agricultural development, rural residential uses, and related traffic. The bridge is a steel Baltimore thr... More
Jones Road Bridge, Spanning Grand River, Eagle, Clinton County, MI
Significance: The bridge is part of Clinton County's local road system which primarily serves existing agricultural development, rural residential uses, and related traffic. The bridge is a steel Baltimore thr... More
Little Missouri River Bridge, Spanning Little Missouri River at CR 179...
Address changed from Old Rome vicinity, Clark County, Arkansas. Significance: The Little Missouri River Bridge is the last remaining Camelback through truss steel bridge in Arkansas. A recent inventory of the ... More
Little Missouri River Bridge, Spanning Little Missouri River at CR 179...
Address changed from Old Rome vicinity, Clark County, Arkansas. Significance: The Little Missouri River Bridge is the last remaining Camelback through truss steel bridge in Arkansas. A recent inventory of the ... More
Black Bridge, Spanning Gunnison River, Grand Junction, Mesa County, CO
Significance: It is significant as the longest and tallest Pratt roadway truss remaining in Colorado. It is exceeded in span length by only one other pinned truss in the survey, the Pennsylvania span of the Rif... More
Black Bridge, Spanning Gunnison River, Grand Junction, Mesa County, CO
Significance: It is significant as the longest and tallest Pratt roadway truss remaining in Colorado. It is exceeded in span length by only one other pinned truss in the survey, the Pennsylvania span of the Rif... More
Beachside Avenue Bridge, Westport, Fairfield County, CT
Significance: Primarily one of local significance. This bridge is a Warren-Pony Truss and is one of several in the area of Fairfield County. Survey number: HAER CT-5 Building/structure dates: 1891 Initial Co... More
Beachside Avenue Bridge, Westport, Fairfield County, CT
Significance: Primarily one of local significance. This bridge is a Warren-Pony Truss and is one of several in the area of Fairfield County. Survey number: HAER CT-5 Building/structure dates: 1891 Initial Co... More
Nebraska City Bridge, Spanning Missouri River near Highway 2 between N...
Report also released under the alternate title, "Behemoths: The Great River Bridges of George S. Morison" Significance: With his long-span railroad bridges over the navigable Midwestern rivers, civil engineer G... More
Nebraska City Bridge, Spanning Missouri River near Highway 2 between N...
Report also released under the alternate title, "Behemoths: The Great River Bridges of George S. Morison" Significance: With his long-span railroad bridges over the navigable Midwestern rivers, civil engineer G... More
Sanders Ferry Bridge, State Highway 184, Spanning Savannah River, Iva,...
Significance: The Sanders Ferry Bridge was built jointly by Elbert County, Georgia and Anderson County, South Carolina. Built by the Austin Bridge Company of Atlanta, the Anderson-Elberton Free Bridge was form... More
Baseline Bridge, Spanning South Platte River on County Road 168, Brigh...
Significance: It is the longest-span example of the basic Warren truss. It is also notable as the only Warren pony truss surveyed in the state that features multiple spans. Survey number: HAER CO-44 Building/... More
New York, New Haven & Hartford Railroad, Automatic Signalization Syste...
Significance: This system is one of the few automatic semaphore signal installations still in use on a major railroad in the United States. It was a major element in the first large-scale application of high-v... More
Hagerstown Road Bridge, Spanning Little Cotoctin Creek at Old Hagersto...
Significance: The Hagerstown Road Bridge is one of 26 metal truss bridges remaining in Frederick County. In 1978, there were approximately 40, but increased traffic has led to removal of many bridges. The bri... More
Hagerstown Road Bridge, Spanning Little Cotoctin Creek at Old Hagersto...
Significance: The Hagerstown Road Bridge is one of 26 metal truss bridges remaining in Frederick County. In 1978, there were approximately 40, but increased traffic has led to removal of many bridges. The bri... 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
Waverly Street Bridge, Spanning George's Creek, Westernport, MD, Weste...
Significance: The Waverly Street Bridge is significant as one of the few remaining bowstring arch-truss bridges in Maryland. The bowstring arch truss was one of the first metal trusses to be widely used in nin... More
Sock Road Bridge, Spanning Beaver Dam River, Lowell, Dodge County, WI
Significance: One of the oldest metal truss bridges in the state, it may have been one of the earliest truss spans manufactured by the E. Kunert Manufacturing Company (1888-1915) of Watertown, Wisconsin. Offer... More
Sock Road Bridge, Spanning Beaver Dam River, Lowell, Dodge County, WI
Significance: One of the oldest metal truss bridges in the state, it may have been one of the earliest truss spans manufactured by the E. Kunert Manufacturing Company (1888-1915) of Watertown, Wisconsin. Offer... More
Twentieth Street Viaduct, Spans Platte River Valley between Thirty-thi...
See also Union Pacific Railroad Warehouse, HABS No. CO-128 Significance: It is the longest of Denver's viaducts. Its length grew from the need to cross not only the Platte River but also Denver's extensive rail... More
Mitchell-Griggs Road Bridge, Spannning Caney Fork on Mitchell-Griggs R...
Significance: The Mitchell-Griggs Road Bridge is an early riveted Warren pony truss, built on a slight skew. Survey number: HAER KY-6 Building/structure dates: 1925 Initial Construction Building/structure da... More
Rock Creek Bridge, Spanning Rock Creek at County Road, South end of Ma...
Significance: The bridge was Carbon County's first steel truss and its location contributed to the economic growth of Joliet by providing access to the community from agricultural areas on the south side of the... More
Rock Creek Bridge, Spanning Rock Creek at County Road, South end of Ma...
Significance: The bridge was Carbon County's first steel truss and its location contributed to the economic growth of Joliet by providing access to the community from agricultural areas on the south side of the... More
Scott Highway Bridge, Spanning Black Creek, Blissfield, Lenawee County...
Significance: The bridge is part of Lenawee County's local roadway system which primarily serves existing agricultural uses and residential traffic. The bridge is an early example of a steel, through truss Pra... More
American Mill Bridge, Spanning Center Creek, intersection Routes H & 7...
Picryl description: Public domain image of an arch bridge, stone structure, architecture, free to use, no copyright restrictions.
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
Tombigbee River Bridge, Spanning Tombigbee River at State Highway 182,...
Significance: The bridge was listed on the National Register of Historic Places in 1988. The bridge over the Tombigbee River at Columbus, Lowndes County, Mississippi was built in 1927 by the Mississippi State H... More
Bedford County Bridge No. 4, Township Route 655 spanning Yellow Creek,...
Significance: This steel-constructed Pratt through truss is a typical metal truss span of the late nineteenth century. It is, however, one of the region's few surviving Keystone Bridge Company spans built for ... More
Scott Fitzhugh Bridge, Spanning Tennessee River at State Highway 76, P...
Significance: The bridge is significant as a representative example of the Pratt and Parker through truss types as well as for its historical associations with the State highway system and toll bridge program i... More
Spruce Street Bridge, East Spruce Street, 500 Block, spanning Power Ca...
Significance: The bridge is typical of the eye-bar truss construction used extensively at the beginning of the twentieth century. This design provided a flat deck suspended from the camel-back arch. Both vert... More
Spruce Street Bridge, East Spruce Street, 500 Block, spanning Power Ca...
Significance: The bridge is typical of the eye-bar truss construction used extensively at the beginning of the twentieth century. This design provided a flat deck suspended from the camel-back arch. Both vert... More
Spruce Street Bridge, East Spruce Street, 500 Block, spanning Power Ca...
Significance: The bridge is typical of the eye-bar truss construction used extensively at the beginning of the twentieth century. This design provided a flat deck suspended from the camel-back arch. Both vert... More
Spruce Street Bridge, East Spruce Street, 500 Block, spanning Power Ca...
Significance: The bridge is typical of the eye-bar truss construction used extensively at the beginning of the twentieth century. This design provided a flat deck suspended from the camel-back arch. Both vert... More
Spruce Street Bridge, East Spruce Street, 500 Block, spanning Power Ca...
Significance: The bridge is typical of the eye-bar truss construction used extensively at the beginning of the twentieth century. This design provided a flat deck suspended from the camel-back arch. Both vert... More
Summer Street Retractile Bridge, Spanning Fort Point Channel at Summer...
Significance: The Summer St. bridge is a rare movable type of bridge known as a retractile draw, in which the moving span is pulled diagonally away from the navigable channel on several sets of rails. Only fou... More
Summer Street Retractile Bridge, Spanning Fort Point Channel at Summer...
Significance: The Summer St. bridge is a rare movable type of bridge known as a retractile draw, in which the moving span is pulled diagonally away from the navigable channel on several sets of rails. Only fou... More
Four Mile Bridge, Spanning Big Horn River on County Road No. 173, Ther...
Significance: The Four Mile Bridge is one of only two rigid connected Pennsylvania Through trusses with substruts still functional on the state and county roads in Wyoming. With a simple span of 175 feet, it i... More
Four Mile Bridge, Spanning Big Horn River on County Road No. 173, Ther...
Significance: The Four Mile Bridge is one of only two rigid connected Pennsylvania Through trusses with substruts still functional on the state and county roads in Wyoming. With a simple span of 175 feet, it i... More
Four Mile Bridge, Spanning Big Horn River on County Road No. 173, Ther...
Significance: The Four Mile Bridge is one of only two rigid connected Pennsylvania Through trusses with substruts still functional on the state and county roads in Wyoming. With a simple span of 175 feet, it i... More
Four Mile Bridge, Spanning Big Horn River on County Road No. 173, Ther...
Significance: The Four Mile Bridge is one of only two rigid connected Pennsylvania Through trusses with substruts still functional on the state and county roads in Wyoming. With a simple span of 175 feet, it i... 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