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Kuskalana Bridge, Mile 146 of Copper River & Northwestern Road, Chitina, Valdez-Cordova Census Area, AK

Kuskalana Bridge, Mile 146 of Copper River & Northwestern Road, Chitin...

Survey number: HAER AK-4 Public domain photograph - historical image of Alaska, United States, free to use, no copyright restrictions image - Picryl description

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning Delaware River, south of Betsy Ross Bridge (State Route 90), Philadelphia, Philadelphia County, PA

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning De...

Significance: Because of its location on the lower Delaware River, the bridge has a collection of extremely long and heavy spans. These include the world's heaviest center-bearing swing span, completed in 1896,... More

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylkill River, north of Arsenal Bridge, Philadelphia, Philadelphia County, PA

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylk...

See also HAER PA-71 for related documentation. Includes photographs. Significance: The West Philadelphia Elevated, part of the Pennsylvania Railroad's program to separate passenger and freight traffic, includes... More

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylkill River, north of Arsenal Bridge, Philadelphia, Philadelphia County, PA

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylk...

See also HAER PA-71 for related documentation. Includes photographs. Significance: The West Philadelphia Elevated, part of the Pennsylvania Railroad's program to separate passenger and freight traffic, includes... More

Monongahela Connecting Railroad Company, Y Trestle, South side of Monongahela River between Thirty-fourth & Twenty-ninth Streets, Pittsburgh, Allegheny County, PA

Monongahela Connecting Railroad Company, Y Trestle, South side of Mono...

Significance: Permitted access between the Monongahela Connecting Railroad and former Pittsburgh and Lake Erie Railroad. P&LE was a major hauler of raw materials into and semi-finished steel products from form... More

Kuskalana Bridge, Mile 146 of Copper River & Northwestern Road, Chitina, Valdez-Cordova Census Area, AK

Kuskalana Bridge, Mile 146 of Copper River & Northwestern Road, Chitin...

Survey number: HAER AK-4 Public domain photograph - historical image of Alaska, United States, free to use, no copyright restrictions image - Picryl description

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, Denver County, CO

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, ...

Significance: Built in 1898. Of all the multiple-span wagon/tram viaducts built in Denver in the 19th century, only the 14th St. Viaduct remains in use. With its 63 spans of steel stringers, it is the only long... More

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning Delaware River, south of Betsy Ross Bridge (State Route 90), Philadelphia, Philadelphia County, PA

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning De...

Significance: Because of its location on the lower Delaware River, the bridge has a collection of extremely long and heavy spans. These include the world's heaviest center-bearing swing span, completed in 1896,... More

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning Delaware River, south of Betsy Ross Bridge (State Route 90), Philadelphia, Philadelphia County, PA

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning De...

Significance: Because of its location on the lower Delaware River, the bridge has a collection of extremely long and heavy spans. These include the world's heaviest center-bearing swing span, completed in 1896,... More

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylkill River, north of Arsenal Bridge, Philadelphia, Philadelphia County, PA

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylk...

See also HAER PA-71 for related documentation. Includes photographs. Significance: The West Philadelphia Elevated, part of the Pennsylvania Railroad's program to separate passenger and freight traffic, includes... More

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylkill River, north of Arsenal Bridge, Philadelphia, Philadelphia County, PA

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylk...

See also HAER PA-71 for related documentation. Includes photographs. Significance: The West Philadelphia Elevated, part of the Pennsylvania Railroad's program to separate passenger and freight traffic, includes... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, Crossing Wolf Creek at Milepost 339.78, Chama, Rio Arriba County, NM

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, ...

Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad... More

Pennsylvania Railroad, Safe Harbor Bridge, Spanning mouth of Conestoga River, Safe Harbor, Lancaster County, PA

Pennsylvania Railroad, Safe Harbor Bridge, Spanning mouth of Conestoga...

Significance: The bridge is unusual two-level structure built to carry two different Pennsylvania Railroad branches. The low-grade freight line on the upper level was chief engineer William H. Brown's last majo... More

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, Denver County, CO

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, ...

Significance: Built in 1898. Of all the multiple-span wagon/tram viaducts built in Denver in the 19th century, only the 14th St. Viaduct remains in use. With its 63 spans of steel stringers, it is the only long... More

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylkill River, north of Arsenal Bridge, Philadelphia, Philadelphia County, PA

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylk...

See also HAER PA-71 for related documentation. Includes photographs. Significance: The West Philadelphia Elevated, part of the Pennsylvania Railroad's program to separate passenger and freight traffic, includes... More

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylkill River, north of Arsenal Bridge, Philadelphia, Philadelphia County, PA

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylk...

See also HAER PA-71 for related documentation. Includes photographs. Significance: The West Philadelphia Elevated, part of the Pennsylvania Railroad's program to separate passenger and freight traffic, includes... More

Monongahela Connecting Railroad Company, Y Trestle, South side of Monongahela River between Thirty-fourth & Twenty-ninth Streets, Pittsburgh, Allegheny County, PA

Monongahela Connecting Railroad Company, Y Trestle, South side of Mono...

Significance: Permitted access between the Monongahela Connecting Railroad and former Pittsburgh and Lake Erie Railroad. P&LE was a major hauler of raw materials into and semi-finished steel products from form... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, Crossing Wolf Creek at Milepost 339.78, Chama, Rio Arriba County, NM

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, ...

Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad... More

Coram Bridge, Spanning Flathead River, Coram, Flathead County, MT

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

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

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

Pennsylvania Railroad, Safe Harbor Bridge, Spanning mouth of Conestoga River, Safe Harbor, Lancaster County, PA

Pennsylvania Railroad, Safe Harbor Bridge, Spanning mouth of Conestoga...

Significance: The bridge is unusual two-level structure built to carry two different Pennsylvania Railroad branches. The low-grade freight line on the upper level was chief engineer William H. Brown's last majo... More

New York, Chicago & St. Louis Railroad, Elk Creek Trestle, Spanning Elk Creek, south of Elk Park Road, Lake City, Erie County, PA

New York, Chicago & St. Louis Railroad, Elk Creek Trestle, Spanning El...

Significance: The crossing is an excellent example of the long trestles required to cross northwestern Pennsylvania's irregular topography. Unprocessed Field note material exists for this structure: N607 Surv... More

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning Delaware River, south of Betsy Ross Bridge (State Route 90), Philadelphia, Philadelphia County, PA

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning De...

Significance: Because of its location on the lower Delaware River, the bridge has a collection of extremely long and heavy spans. These include the world's heaviest center-bearing swing span, completed in 1896,... More

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning Delaware River, south of Betsy Ross Bridge (State Route 90), Philadelphia, Philadelphia County, PA

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning De...

Significance: Because of its location on the lower Delaware River, the bridge has a collection of extremely long and heavy spans. These include the world's heaviest center-bearing swing span, completed in 1896,... More

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylkill River, north of Arsenal Bridge, Philadelphia, Philadelphia County, PA

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylk...

See also HAER PA-71 for related documentation. Includes photographs. Significance: The West Philadelphia Elevated, part of the Pennsylvania Railroad's program to separate passenger and freight traffic, includes... More

Monongahela Connecting Railroad Company, Y Trestle, South side of Monongahela River between Thirty-fourth & Twenty-ninth Streets, Pittsburgh, Allegheny County, PA

Monongahela Connecting Railroad Company, Y Trestle, South side of Mono...

Significance: Permitted access between the Monongahela Connecting Railroad and former Pittsburgh and Lake Erie Railroad. P&LE was a major hauler of raw materials into and semi-finished steel products from form... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, Crossing Wolf Creek at Milepost 339.78, Chama, Rio Arriba County, NM

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, ...

Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad... More

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, Crossing Wolf Creek at Milepost 339.78, Chama, Rio Arriba County, NM

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, ...

Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad... More

Coram Bridge, Spanning Flathead River, Coram, Flathead County, MT

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

Pennsylvania Railroad, Safe Harbor Bridge, Spanning mouth of Conestoga River, Safe Harbor, Lancaster County, PA

Pennsylvania Railroad, Safe Harbor Bridge, Spanning mouth of Conestoga...

Significance: The bridge is unusual two-level structure built to carry two different Pennsylvania Railroad branches. The low-grade freight line on the upper level was chief engineer William H. Brown's last majo... More

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning Delaware River, south of Betsy Ross Bridge (State Route 90), Philadelphia, Philadelphia County, PA

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning De...

Significance: Because of its location on the lower Delaware River, the bridge has a collection of extremely long and heavy spans. These include the world's heaviest center-bearing swing span, completed in 1896,... More

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning Delaware River, south of Betsy Ross Bridge (State Route 90), Philadelphia, Philadelphia County, PA

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning De...

Significance: Because of its location on the lower Delaware River, the bridge has a collection of extremely long and heavy spans. These include the world's heaviest center-bearing swing span, completed in 1896,... More

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning Delaware River, south of Betsy Ross Bridge (State Route 90), Philadelphia, Philadelphia County, PA

Pennsylvania & New Jersey Railroad, Delaware River Bridge, Spanning De...

Significance: Because of its location on the lower Delaware River, the bridge has a collection of extremely long and heavy spans. These include the world's heaviest center-bearing swing span, completed in 1896,... More

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylkill River, north of Arsenal Bridge, Philadelphia, Philadelphia County, PA

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylk...

See also HAER PA-71 for related documentation. Includes photographs. Significance: The West Philadelphia Elevated, part of the Pennsylvania Railroad's program to separate passenger and freight traffic, includes... More

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylkill River, north of Arsenal Bridge, Philadelphia, Philadelphia County, PA

Pennsylvania Railroad, West Philadelphia Elevated, Parallel to Schuylk...

See also HAER PA-71 for related documentation. Includes photographs. Significance: The West Philadelphia Elevated, part of the Pennsylvania Railroad's program to separate passenger and freight traffic, includes... More

Kuskalana Bridge, Mile 146 of Copper River & Northwestern Road, Chitina, Valdez-Cordova Census Area, AK

Kuskalana Bridge, Mile 146 of Copper River & Northwestern Road, Chitin...

Survey number: HAER AK-4 Public domain photograph - historical image of Alaska, United States, free to use, no copyright restrictions image - Picryl description

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

Memphis Bridge, Spanning Mississippi River, Memphis, Shelby County, TN

See also HAER NE-2 for additional documentation. Significance: Designated a National Historic Civil Engineering Landmark because it was the third longest railroad bridge in the world at 790' when completed. It... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Cr...

Significance: At 1.9 miles long, the bridge is one of the major river crossings in the American South and the largest steel truss bridge in South Carolina. At the time of its construction, it was the fifth lon... More

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, Crossing Wolf Creek at Milepost 339.78, Chama, Rio Arriba County, NM

Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, ...

Significance: The San Juan Extension (SJE) of the Denver & Rio Grande Railroad (D&RG), now known as the Cumbres & Toltec Scenic Railroad (C&TS), is a relatively unchanged survivor of the first years of railroad... More

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, Denver County, CO

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, ...

Significance: Built in 1898. Of all the multiple-span wagon/tram viaducts built in Denver in the 19th century, only the 14th St. Viaduct remains in use. With its 63 spans of steel stringers, it is the only long... More

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, Denver County, CO

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, ...

Significance: Built in 1898. Of all the multiple-span wagon/tram viaducts built in Denver in the 19th century, only the 14th St. Viaduct remains in use. With its 63 spans of steel stringers, it is the only long... More

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, Denver County, CO

Fourteenth Street Viaduct, Fourteenth Street at Wazee Street, Denver, ...

Significance: Built in 1898. Of all the multiple-span wagon/tram viaducts built in Denver in the 19th century, only the 14th St. Viaduct remains in use. With its 63 spans of steel stringers, it is the only long... More

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