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warren trusses

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San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

Choctaw Bottoms Road Bridge, Spanning Choctaw Creek at Choctaw Bottoms Road, Denison, Grayson County, TX

Choctaw Bottoms Road Bridge, Spanning Choctaw Creek at Choctaw Bottoms...

Significance: The Choctaw Bottoms Road Bridge is one of two extant bridges in Texas known to have been erected by the American Bridge Company of New York, a major twentieth-century bridge building firm. Survey... More

Alcovy Road Bridge, Spanning Alcovy River, Covington, Newton County, GA

Alcovy Road Bridge, Spanning Alcovy River, Covington, Newton County, G...

Significance: The Alcovy Road Bridge is composed of two steel bolt connected Warren pony trusses with verticals and one pin-connected Pratt through truss. The overall length of the bridge is 225 feet. The bri... More

Alcovy Road Bridge, Spanning Alcovy River, Covington, Newton County, GA

Alcovy Road Bridge, Spanning Alcovy River, Covington, Newton County, G...

Significance: The Alcovy Road Bridge is composed of two steel bolt connected Warren pony trusses with verticals and one pin-connected Pratt through truss. The overall length of the bridge is 225 feet. The bri... More

Coldwater Bridge, Spanning Coldwater Creek on Old Railroad Bed Road, Fayetteville, Lincoln County, TN

Coldwater Bridge, Spanning Coldwater Creek on Old Railroad Bed Road, F...

Significance: The bridge derives its significance as an unusual example of the pony Warren truss type. The bridge also possesses historical significance in Lincoln County transportation (railroad) history. Sur... More

Conrail Port Perry Bridge, Spanning Monongahela River, Port Perry, Allegheny County, PA

Conrail Port Perry Bridge, Spanning Monongahela River, Port Perry, All...

Part of the Monongahela River Recording Project, which included HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela Rive... More

Road S-1-133 Bridge, Spanning Long Cane Creek, Abbeville, Abbeville County, SC

Road S-1-133 Bridge, Spanning Long Cane Creek, Abbeville, Abbeville Co...

Significance: The Road S-1-133/Lane Cane Creek is identified as Abbeville 4 in the South Carolina Department of Transportation's Highway Bridge Inventory. This Warren pony truss bridge has a polygonal upper ch... More

Melrose Bridge, Spanning Black River at State Trunk Highway 108, Melrose, Jackson County, WI

Melrose Bridge, Spanning Black River at State Trunk Highway 108, Melro...

Significance: Only six Pennsylvania highway trusses are known to have been built in Wisconsin. Four of the six, including the Melrose Bridge, have been replaced within the last 10 years. The Melrose Bridge is... More

Melrose Bridge, Spanning Black River at State Trunk Highway 108, Melrose, Jackson County, WI

Melrose Bridge, Spanning Black River at State Trunk Highway 108, Melro...

Significance: Only six Pennsylvania highway trusses are known to have been built in Wisconsin. Four of the six, including the Melrose Bridge, have been replaced within the last 10 years. The Melrose Bridge is... More

Range Line Road Bridge, Spanning West Branch of Eau Claire River, on Range Line Road, Antigo, Langlade County, WI

Range Line Road Bridge, Spanning West Branch of Eau Claire River, on R...

Significance: The Range Line Road Bridge is a single span Warren truss consisting almost entirely of riveted angles. A distinctive feature is the continuous top chord that extends to the shoe, eliminating the ... More

Grant Road Bridge, Spanning Raquette River at Grant Road, Raymondville, St. Lawrence County, NY

Grant Road Bridge, Spanning Raquette River at Grant Road, Raymondville...

Significance: This is the longest single-span, lenticular truss bridge constructed by the Berlin Iron Bridge Company and the largest extant example of its type in New York State. Survey number: HAER NY-293 Bu... More

Salt Creek Bridge, Spanning Big Salt Creek, bypassed section of Arch Hill Road (CR 82), Norwich, Muskingum County, OH

Salt Creek Bridge, Spanning Big Salt Creek, bypassed section of Arch H...

Significance: Salt Creek Bridge is the only surviving pure Warren truss covered bridge in the United States. Although the Warren truss, patented in 1848, was originally designed as a timber/iron truss, it did ... More

Salt Creek Bridge, Spanning Big Salt Creek, bypassed section of Arch Hill Road (CR 82), Norwich, Muskingum County, OH

Salt Creek Bridge, Spanning Big Salt Creek, bypassed section of Arch H...

Significance: Salt Creek Bridge is the only surviving pure Warren truss covered bridge in the United States. Although the Warren truss, patented in 1848, was originally designed as a timber/iron truss, it did ... More

Victory Bridge, Spanning Raritan River at New Jersey Route 35, Perth Amboy, Middlesex County, NJ

Victory Bridge, Spanning Raritan River at New Jersey Route 35, Perth A...

Significance: This 360 foot center-bearing swing span bridge with steel deck girder and concrete bent approach spans is significant as the largest and most recent example of a highway bridge of its type in the ... More

Bridge No. 18, Spanning Kickapoo River, La Farge, Vernon County, WI

Bridge No. 18, Spanning Kickapoo River, La Farge, Vernon County, WI

Significance: Bridge No. 18 is significant for its Warren truss design features, as well as for its relation to the history of transportation in the St. Croix Valley and the history of Hudson, Wisconsin. Surve... More

Bridge No. 18, Spanning Kickapoo River, La Farge, Vernon County, WI

Bridge No. 18, Spanning Kickapoo River, La Farge, Vernon County, WI

Significance: Bridge No. 18 is significant for its Warren truss design features, as well as for its relation to the history of transportation in the St. Croix Valley and the history of Hudson, Wisconsin. Surve... More

Bridge No. 18, Spanning Kickapoo River, La Farge, Vernon County, WI

Bridge No. 18, Spanning Kickapoo River, La Farge, Vernon County, WI

Significance: Bridge No. 18 is significant for its Warren truss design features, as well as for its relation to the history of transportation in the St. Croix Valley and the history of Hudson, Wisconsin. Surve... More

South Carolina Route 391 Bridge, Spanning Saluda River on South Carolina Route 391, Saluda, Saluda County, SC

South Carolina Route 391 Bridge, Spanning Saluda River on South Caroli...

Significance: The S.C. Route 391 bridge is identified as Saluda 3 in the Department's Metal Truss Highway Bridge Inventory and is one of 148 bridges of this type remaining in the State. Its significance is der... More

Thatcher Bridge, Spanning Bear River, Thatcher, Franklin County, ID

Thatcher Bridge, Spanning Bear River, Thatcher, Franklin County, ID

Significance: A steel through Warren truss bridge typical of bridges constructed in the area during the early 1900's. / This bridge was constructed in 1910 to serves as a main farm to market crossing over the B... More

John T. Cunningham Memorial Bridge, Spanning Cumberland River, on Old State Route 13, Clarksville, Montgomery County, TN

John T. Cunningham Memorial Bridge, Spanning Cumberland River, on Old ...

Significance: The bridge is an example of the K-truss, one of only two known to exist in Tennessee. The bridge also is historically significant as one of the first bridge built by the Tennessee State Highway De... More

John T. Cunningham Memorial Bridge, Spanning Cumberland River, on Old State Route 13, Clarksville, Montgomery County, TN

John T. Cunningham Memorial Bridge, Spanning Cumberland River, on Old ...

Significance: The bridge is an example of the K-truss, one of only two known to exist in Tennessee. The bridge also is historically significant as one of the first bridge built by the Tennessee State Highway De... More

Medicine Bow Bridge, Spanning Medicine Bow River on County Road No. 120-1, Elk Mountain, Carbon County, WY

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

Burroughs Street Bridge, Spanning Flat River, Lowell, Kent County, MI

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

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 County, WI

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

Hassler Bridge, Spanning Obey River at State Route 42, Byrdstown, Pickett County, TN

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

Beachside Avenue Bridge, Westport, Fairfield County, CT

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

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

Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

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, from WM milepost 125 to 160, Pearre, Washington County, MD

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, from WM milepost 125 to 160, Pearre, Washington County, MD

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, from WM milepost 125 to 160, Pearre, Washington County, MD

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, from WM milepost 125 to 160, Pearre, Washington County, MD

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, from WM milepost 125 to 160, Pearre, Washington County, MD

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, from WM milepost 125 to 160, Pearre, Washington County, MD

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, from WM milepost 125 to 160, Pearre, Washington County, MD

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

Mitchell-Griggs Road Bridge, Spannning Caney Fork on Mitchell-Griggs Road, Dixon, Webster County, KY

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

Arlington Memorial Bridge, Spanning Potomac River between Lincoln Memorial & Arlington National Cemetery, Washington, District of Columbia, DC

Arlington Memorial Bridge, Spanning Potomac River between Lincoln Memo...

Significance: As the final link in the chain of monuments which start at the Capitol building, the Arlington Memorial Bridge connects the Mall in Washington, DC with Arlington National Cemetery in Virginia. De... More

Double Intersection Warren Truss Bridge, Spanning Blackledge River, Colchester, New London County, CT

Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...

Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More

Double Intersection Warren Truss Bridge, Spanning Blackledge River, Colchester, New London County, CT

Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...

Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More

Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Burleigh County, ND

Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...

Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More

Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Burleigh County, ND

Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...

Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More

Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Burleigh County, ND

Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...

Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More

Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Burleigh County, ND

Liberty Memorial Bridge, Spanning Missouri River at I-94, Bismarck, Bu...

Significance: The Liberty Memorial Bridge is a three-span, Warren-Turner through truss bridge, a variation of the Warren through truss designed by C.A.P. Turner. This was the first highway bridge over the Miss... More

Saluda 1 Bridge, Spanning Saluda River on SC Route 39, Chappells, Newberry County, SC

Saluda 1 Bridge, Spanning Saluda River on SC Route 39, Chappells, Newb...

Significance: The bridge on South Carolina Route 39, identified as Saluda 1 in the South Carolina Department of Highways and Public Transportation's Metal Truss Highway Bridge Inventory, is one of 148 metal tru... More

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County,...

Picryl description: Public domain image of a bridge, water, historic structure, free to use, no copyright restrictions.

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County,...

Public domain scan of architectural drawing, architecture, free to use, no copyright restrictions image - Picryl description

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County,...

Picryl description: Public domain image of an architectural element, dome, cathedral, classical architecture, free to use, no copyright restrictions.

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County,...

Picryl description: Public domain image of a river, water stream, lake or pond, park or forest, natural landscape, free to use, no copyright restrictions.

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County,...

Picryl description: Public domain image of a vintage city plan, 18th-19th century map, free to use, no copyright restrictions.

Van Buren Bridge, Spanning Current River at US Route 60, Van Buren, Carter County, MO

Van Buren Bridge, Spanning Current River at US Route 60, Van Buren, Ca...

Significance: The Van Buren Bridge is a multiple-span structure consisting of a six-panel Pratt through truss, a ten-panel Parker through truss, and ten Warren pony truss approach spans. It is one of Missouri'... More

Van Buren Bridge, Spanning Current River at US Route 60, Van Buren, Carter County, MO

Van Buren Bridge, Spanning Current River at US Route 60, Van Buren, Ca...

Significance: The Van Buren Bridge is a multiple-span structure consisting of a six-panel Pratt through truss, a ten-panel Parker through truss, and ten Warren pony truss approach spans. It is one of Missouri'... More

Van Buren Bridge, Spanning Current River at US Route 60, Van Buren, Carter County, MO

Van Buren Bridge, Spanning Current River at US Route 60, Van Buren, Ca...

Significance: The Van Buren Bridge is a multiple-span structure consisting of a six-panel Pratt through truss, a ten-panel Parker through truss, and ten Warren pony truss approach spans. It is one of Missouri'... More

Kaibab Trail Suspension Bridge, Spanning Colorado River, Grand Canyon, Coconino County, AZ

Kaibab Trail Suspension Bridge, Spanning Colorado River, Grand Canyon,...

Significance: This is the site of the first bridge crossing of the Colorado River within the Grand Canyon National Park. It comprises an excellent example of an early 20th century suspension bridge designed fo... More

Kaibab Trail Suspension Bridge, Spanning Colorado River, Grand Canyon, Coconino County, AZ

Kaibab Trail Suspension Bridge, Spanning Colorado River, Grand Canyon,...

Significance: This is the site of the first bridge crossing of the Colorado River within the Grand Canyon National Park. It comprises an excellent example of an early 20th century suspension bridge designed fo... More

Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Ja...

Significance: The Bridgeport Swing Span Railroad Bridge embodies the distinctive characteristics of a type, period and method of construction. Its method of construction (pin-connected) is rare for a swing bri... More

Stamford Post Office, 421 Atlantic Street, Stamford, Fairfield County, CT

Stamford Post Office, 421 Atlantic Street, Stamford, Fairfield County,...

Significance: Designed in 1914 and completed in 1916, the Stamford Post Office is an excellent example of an eclectic Neo-Renaissance style federal building constructed in the early twentieth century. As empha... More

Stamford Post Office, 421 Atlantic Street, Stamford, Fairfield County, CT

Stamford Post Office, 421 Atlantic Street, Stamford, Fairfield County,...

Significance: Designed in 1914 and completed in 1916, the Stamford Post Office is an excellent example of an eclectic Neo-Renaissance style federal building constructed in the early twentieth century. As empha... More

Stamford Post Office, 421 Atlantic Street, Stamford, Fairfield County, CT

Stamford Post Office, 421 Atlantic Street, Stamford, Fairfield County,...

Significance: Designed in 1914 and completed in 1916, the Stamford Post Office is an excellent example of an eclectic Neo-Renaissance style federal building constructed in the early twentieth century. As empha... More

Stamford Post Office, 421 Atlantic Street, Stamford, Fairfield County, CT

Stamford Post Office, 421 Atlantic Street, Stamford, Fairfield County,...

Significance: Designed in 1914 and completed in 1916, the Stamford Post Office is an excellent example of an eclectic Neo-Renaissance style federal building constructed in the early twentieth century. As empha... More

Potomac Edison Company, Chesapeake & Ohio Canal Bridge, Spanning C & O Canal South of U.S. 11, Williamsport, Washington County, MD

Potomac Edison Company, Chesapeake & Ohio Canal Bridge, Spanning C & O...

Significance: The Chesapeake & Ohio Canal Lift Bridge is significant as a rare surviving example of a short-span railroad vertical lift bridge, for its unusual design elements to allow unimpeded passage of cana... More

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian Route 402, Port Huron, St. Clair County, MI

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian ...

Significance: When it opened in October 1938, the Blue Water Bridge symbolized the peaceful relationship between the United States and Canada, a sharp contrast to the hostilities in Europe which were about to e... More

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian Route 402, Port Huron, St. Clair County, MI

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian ...

Significance: When it opened in October 1938, the Blue Water Bridge symbolized the peaceful relationship between the United States and Canada, a sharp contrast to the hostilities in Europe which were about to e... More

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian Route 402, Port Huron, St. Clair County, MI

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian ...

Significance: When it opened in October 1938, the Blue Water Bridge symbolized the peaceful relationship between the United States and Canada, a sharp contrast to the hostilities in Europe which were about to e... More

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian Route 402, Port Huron, St. Clair County, MI

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian ...

Significance: When it opened in October 1938, the Blue Water Bridge symbolized the peaceful relationship between the United States and Canada, a sharp contrast to the hostilities in Europe which were about to e... More

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian Route 402, Port Huron, St. Clair County, MI

Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian ...

Significance: When it opened in October 1938, the Blue Water Bridge symbolized the peaceful relationship between the United States and Canada, a sharp contrast to the hostilities in Europe which were about to e... More

Seddon Island Scherzer Rolling Lift Bridge, Spanning Garrison Channel from Tampa to Sedden Island, Tampa, Hillsborough County, FL

Seddon Island Scherzer Rolling Lift Bridge, Spanning Garrison Channel ...

Significance: The Seddon Island Scherzer Rolling Lift Bridge is the oldest, longest-span Scherzer rolling lift bridge in Florida. It is a well-preserved example of a popular type of patented movable bridge, fa... More

Seddon Island Scherzer Rolling Lift Bridge, Spanning Garrison Channel from Tampa to Sedden Island, Tampa, Hillsborough County, FL

Seddon Island Scherzer Rolling Lift Bridge, Spanning Garrison Channel ...

Significance: The Seddon Island Scherzer Rolling Lift Bridge is the oldest, longest-span Scherzer rolling lift bridge in Florida. It is a well-preserved example of a popular type of patented movable bridge, fa... More

Seddon Island Scherzer Rolling Lift Bridge, Spanning Garrison Channel from Tampa to Sedden Island, Tampa, Hillsborough County, FL

Seddon Island Scherzer Rolling Lift Bridge, Spanning Garrison Channel ...

Significance: The Seddon Island Scherzer Rolling Lift Bridge is the oldest, longest-span Scherzer rolling lift bridge in Florida. It is a well-preserved example of a popular type of patented movable bridge, fa... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...

Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More

Alcovy Road Bridge, Spanning Alcovy River, Covington, Newton County, GA

Alcovy Road Bridge, Spanning Alcovy River, Covington, Newton County, G...

Significance: The Alcovy Road Bridge is composed of two steel bolt connected Warren pony trusses with verticals and one pin-connected Pratt through truss. The overall length of the bridge is 225 feet. The bri... More

Racine Street Bridge, Spanning Rock River, Jefferson, Jefferson County, WI

Racine Street Bridge, Spanning Rock River, Jefferson, Jefferson County...

Significance: The Racine Street Bridge is an 11-span deck truss bridge built by the Milwaukee Bridge Company from Wisconsin State Highway Commission plans. With three Warren deck truss spans that equal more tha... More

Racine Street Bridge, Spanning Rock River, Jefferson, Jefferson County, WI

Racine Street Bridge, Spanning Rock River, Jefferson, Jefferson County...

Significance: The Racine Street Bridge is an 11-span deck truss bridge built by the Milwaukee Bridge Company from Wisconsin State Highway Commission plans. With three Warren deck truss spans that equal more tha... More

Racine Street Bridge, Spanning Rock River, Jefferson, Jefferson County, WI

Racine Street Bridge, Spanning Rock River, Jefferson, Jefferson County...

Significance: The Racine Street Bridge is an 11-span deck truss bridge built by the Milwaukee Bridge Company from Wisconsin State Highway Commission plans. With three Warren deck truss spans that equal more tha... More

Conrail Port Perry Bridge, Spanning Monongahela River, Port Perry, Allegheny County, PA

Conrail Port Perry Bridge, Spanning Monongahela River, Port Perry, All...

Part of the Monongahela River Recording Project, which included HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela Rive... More

Conrail Port Perry Bridge, Spanning Monongahela River, Port Perry, Allegheny County, PA

Conrail Port Perry Bridge, Spanning Monongahela River, Port Perry, All...

Part of the Monongahela River Recording Project, which included HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela Rive... More

Melrose Bridge, Spanning Black River at State Trunk Highway 108, Melrose, Jackson County, WI

Melrose Bridge, Spanning Black River at State Trunk Highway 108, Melro...

Significance: Only six Pennsylvania highway trusses are known to have been built in Wisconsin. Four of the six, including the Melrose Bridge, have been replaced within the last 10 years. The Melrose Bridge is... More

Melrose Bridge, Spanning Black River at State Trunk Highway 108, Melrose, Jackson County, WI

Melrose Bridge, Spanning Black River at State Trunk Highway 108, Melro...

Significance: Only six Pennsylvania highway trusses are known to have been built in Wisconsin. Four of the six, including the Melrose Bridge, have been replaced within the last 10 years. The Melrose Bridge is... More

Tutwiler Bridge, Spanning Tombigbee River on Alabama State Highway 9, Gainesville, Sumter County, AL

Tutwiler Bridge, Spanning Tombigbee River on Alabama State Highway 9, ...

Survey number: HAER AL-207 Public domain photograph - historical image of Alabama, United States, free to use, no copyright restrictions image - Picryl description

Honeydew Creek Bridge, Wilder Ridge Road, Honeydew, Humboldt County, CA

Honeydew Creek Bridge, Wilder Ridge Road, Honeydew, Humboldt County, C...

Significance: Honeydew Creek Bridge is the only known inverted Warren truss bridge in the State of California. On the basis of its unique design and architectural significance (per 36 CFR 60.6c) the bridge has... More

Poplar Grove Road Bridge, Spanning Chicago & Northwestern Railroad, Lebanon, Dodge County, WI

Poplar Grove Road Bridge, Spanning Chicago & Northwestern Railroad, Le...

Significance: The Poplar Grove Road Bridge utilizes a single span, two lane, Warren Double-Intersection pony truss. Erected in 1883 by the Alden and Lassig Bridge and Iron Works of Chicago for the Chicago & Nor... More

Salt Creek Bridge, Spanning Big Salt Creek, bypassed section of Arch Hill Road (CR 82), Norwich, Muskingum County, OH

Salt Creek Bridge, Spanning Big Salt Creek, bypassed section of Arch H...

Significance: Salt Creek Bridge is the only surviving pure Warren truss covered bridge in the United States. Although the Warren truss, patented in 1848, was originally designed as a timber/iron truss, it did ... More

Saluda County Bridge No. 4, Road S-26 spanning Clouds Creek, Jones Crossroads, Saluda County, SC

Saluda County Bridge No. 4, Road S-26 spanning Clouds Creek, Jones Cro...

Significance: The significance of the bridges lies not so much in its design, as in the fact that it is the only known Warren pony truss constructed in South Carolina by the Austin Brothers Bridge Company of At... More

Toelles Road Bridge, Spanning Quinnipiac River, Wallingford, New Haven County, CT

Toelles Road Bridge, Spanning Quinnipiac River, Wallingford, New Haven...

Significance: Constructed by the Berlin Iron Bridge Company, one of Connecticut's most noted bridge builders, this structure represents one of the company's original bridge projects using steel. The bridge is ... More

Victory Bridge, Spanning Raritan River at New Jersey Route 35, Perth Amboy, Middlesex County, NJ

Victory Bridge, Spanning Raritan River at New Jersey Route 35, Perth A...

Significance: This 360 foot center-bearing swing span bridge with steel deck girder and concrete bent approach spans is significant as the largest and most recent example of a highway bridge of its type in the ... More

Bridge No. 18, Spanning Kickapoo River, La Farge, Vernon County, WI

Bridge No. 18, Spanning Kickapoo River, La Farge, Vernon County, WI

Significance: Bridge No. 18 is significant for its Warren truss design features, as well as for its relation to the history of transportation in the St. Croix Valley and the history of Hudson, Wisconsin. Surve... More

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