Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Columbia River Bridge at Grand Coulee Dam, Spanning Columbia River at ...
Significance: The U.S. Bureau of Reclamation constructed this structure as part of the Grand Coulee Dam Columbia Basin Reclamation Project. It is a good example of 1930s steel cantilever bridge design in Washi... More
Columbia River Bridge at Bridgeport, State Route 17 spanning Columbia ...
Significance: This bridge is the only large-scale steel truss built in Washington immediately after World War II. Like the Columbia River Bridge at Grand Coulee Dam (HAER No. WA-102), it was a federal structur... More
McMillin Bridge, Spanning Puyallup River at State Route 162, McMillin,...
Significance: This is a rare example of a reinforced-concrete through truss bridge. The form of its members and details are unique. At the time of its construction it was thought to be the longest concrete tr... More
Hoquiam River Bridge, U.S. Route 101 (Simpson Avenue) spanning Hoquiam...
Significance: The central span is an example of a patented double-leaf Strauss underneath counterweight bascule bridge. The Strauss Bascule Bridge Company was one of the most important bridge building firms in... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Fairfax Bridge, Spanning Carbon River at State Route 165, Carbonado, P...
Significance: It is one of only two extant three-hinged steel arches in the state of Washington. / The building of the Fairfax Bridge across the Carbon River canyon in 1921 was the culmination of years of earne... More
Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Columbia River Bridge at Bridgeport, State Route 17 spanning Columbia ...
Significance: This bridge is the only large-scale steel truss built in Washington immediately after World War II. Like the Columbia River Bridge at Grand Coulee Dam (HAER No. WA-102), it was a federal structur... More
McMillin Bridge, Spanning Puyallup River at State Route 162, McMillin,...
Significance: This is a rare example of a reinforced-concrete through truss bridge. The form of its members and details are unique. At the time of its construction it was thought to be the longest concrete tr... More
Hoquiam River Bridge, U.S. Route 101 (Simpson Avenue) spanning Hoquiam...
Significance: The central span is an example of a patented double-leaf Strauss underneath counterweight bascule bridge. The Strauss Bascule Bridge Company was one of the most important bridge building firms in... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Dosewallips River Bridge, U.S. Route 101 spanning Dosewallips River, B...
Significance: The Dosewallips River Bridge is an example of a riveted through Pettit truss with sub-struts and polygonal top chord (Pennsylvania truss). It is possibly the earliest example of the standard 240'... More
City Waterway Bridge, Spanning City Waterway at State Route 509, Tacom...
Significance: The City Waterway Bridge is an early example of a vertical lift bridge, designed by the renowned firm of Waddell and Harrington. Three features made it remarkable, if not unique among vertical li... More
Purdy Bridge, Spans strait between Henderson Bay & Burley Lagoon, Purd...
Significance: An example of a reinforced-concrete box-girder bridge, which was common in Europe but rare in the United States. It was considered the longest of its kind when built. It has been placed on the N... More
Spokane River Bridge at Fort Spokane, Spanning Spokane River at State ...
Significance: This bridge was one of two steel cantilever spans that the Washington Department of Highways constructed to replace structures flooded by the waters rising behind Grand Coulee Dam. / The Spokane R... More
McMillin Bridge, Spanning Puyallup River at State Route 162, McMillin,...
Significance: This is a rare example of a reinforced-concrete through truss bridge. The form of its members and details are unique. At the time of its construction it was thought to be the longest concrete tr... More
Columbia River Bridge at Kettle Falls, U.S. Route 395 spanning Columbi...
Significance: This bridge was one of two steel cantilever spans that the Washington Department of Highways constructed to replace structures flooded by the waters rising behind Grand Coulee Dam. / The Columbia ... More
South Hamma Hamma River Bridge, Spanning Hamma Hamma River at U.S. Rou...
Significance: The South Hamma Hamma River Bridge is one of two identical bridges spanning the north and south branches of the Hamma Hamma River (the other is the North Hamma Hamma River Bridge, HAER No. WA-97).... More
Hoquiam River Bridge, U.S. Route 101 (Simpson Avenue) spanning Hoquiam...
Significance: The central span is an example of a patented double-leaf Strauss underneath counterweight bascule bridge. The Strauss Bascule Bridge Company was one of the most important bridge building firms in... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Columbia River Bridge at Grand Coulee Dam, Spanning Columbia River at ...
Significance: The U.S. Bureau of Reclamation constructed this structure as part of the Grand Coulee Dam Columbia Basin Reclamation Project. It is a good example of 1930s steel cantilever bridge design in Washi... More
Columbia River Bridge at Grand Coulee Dam, Spanning Columbia River at ...
Significance: The U.S. Bureau of Reclamation constructed this structure as part of the Grand Coulee Dam Columbia Basin Reclamation Project. It is a good example of 1930s steel cantilever bridge design in Washi... More
City Waterway Bridge, Spanning City Waterway at State Route 509, Tacom...
Significance: The City Waterway Bridge is an early example of a vertical lift bridge, designed by the renowned firm of Waddell and Harrington. Three features made it remarkable, if not unique among vertical li... More
Spokane River Bridge at Long Lake Dam, Spannng Spokane River at State ...
Significance: The bridge is a late example of an open-spandrel reinforced-concrete ribbed deck arch. Considere hinges were used at the skewbacks to relieve stresses in the arch during the construction of the b... More
Columbia River Bridge at Bridgeport, State Route 17 spanning Columbia ...
Significance: This bridge is the only large-scale steel truss built in Washington immediately after World War II. Like the Columbia River Bridge at Grand Coulee Dam (HAER No. WA-102), it was a federal structur... More
McMillin Bridge, Spanning Puyallup River at State Route 162, McMillin,...
Significance: This is a rare example of a reinforced-concrete through truss bridge. The form of its members and details are unique. At the time of its construction it was thought to be the longest concrete tr... More
Columbia River Bridge at Kettle Falls, U.S. Route 395 spanning Columbi...
Significance: This bridge was one of two steel cantilever spans that the Washington Department of Highways constructed to replace structures flooded by the waters rising behind Grand Coulee Dam. / The Columbia ... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Louisiana State University, Livestock Judging Pavilion, Louisiana Stat...
1989 Charles E. Peterson Prize, First Place Significance: The LSU Livestock Judging Pavilion was constructed in 1923 at a cost of $62,000. It was one of the first group of 21 buildings built on the campus, all... More
Louisiana State University, Livestock Judging Pavilion, Louisiana Stat...
1989 Charles E. Peterson Prize, First Place Significance: The LSU Livestock Judging Pavilion was constructed in 1923 at a cost of $62,000. It was one of the first group of 21 buildings built on the campus, all... More
Louisiana State University, Livestock Judging Pavilion, Louisiana Stat...
1989 Charles E. Peterson Prize, First Place Significance: The LSU Livestock Judging Pavilion was constructed in 1923 at a cost of $62,000. It was one of the first group of 21 buildings built on the campus, all... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Fairfax Bridge, Spanning Carbon River at State Route 165, Carbonado, P...
Significance: It is one of only two extant three-hinged steel arches in the state of Washington. / The building of the Fairfax Bridge across the Carbon River canyon in 1921 was the culmination of years of earne... More
Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Chehalis River Riverside Bridge, Spanning Chehalis River at State Rout...
Significance: The Chehalis River Riverside Bridge is a riveted Warren through truss with verticals. It was built to the new 240's standard bridge design devised by the Washington Department of Highways which s... More
Baker River Bridge, Spanning Baker River at State Route 20, Concrete, ...
Significance: The bridge was the only link between the two halves of the city of Concrete. It is an early example of a reinforced-concrete open spandrel arch and was reputedly one of the longest single-span co... More
Baker River Bridge, Spanning Baker River at State Route 20, Concrete, ...
Significance: The bridge was the only link between the two halves of the city of Concrete. It is an early example of a reinforced-concrete open spandrel arch and was reputedly one of the longest single-span co... More
Vancouver-Portland Interstate Bridge, Interstate Route 5 Spanning Colu...
Significance: The original 1917 bridge represented an enormous financial and engineering accomplishment, shared by the counties of two states. It was designed by the renowned engineering firm Waddell & Harring... More
South Hamma Hamma River Bridge, Spanning Hamma Hamma River at U.S. Rou...
Significance: The South Hamma Hamma River Bridge is one of two identical bridges spanning the north and south branches of the Hamma Hamma River (the other is the North Hamma Hamma River Bridge, HAER No. WA-97).... More
Hoquiam River Bridge, U.S. Route 101 (Simpson Avenue) spanning Hoquiam...
Significance: The central span is an example of a patented double-leaf Strauss underneath counterweight bascule bridge. The Strauss Bascule Bridge Company was one of the most important bridge building firms in... More
Yale Bridge, State Route 503 Spanning Lewis River, Yale, Cowlitz Count...
Significance: The Yale Bridge is the only steel short-span suspension bridge in the state, although there are many timber examples. It is rare in the sense that less expensive span types are usually chosen for... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Louisiana State University, Livestock Judging Pavilion, Louisiana Stat...
1989 Charles E. Peterson Prize, First Place Significance: The LSU Livestock Judging Pavilion was constructed in 1923 at a cost of $62,000. It was one of the first group of 21 buildings built on the campus, all... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Chehalis River Riverside Bridge, Spanning Chehalis River at State Rout...
Significance: The Chehalis River Riverside Bridge is a riveted Warren through truss with verticals. It was built to the new 240's standard bridge design devised by the Washington Department of Highways which s... More
Baker River Bridge, Spanning Baker River at State Route 20, Concrete, ...
Significance: The bridge was the only link between the two halves of the city of Concrete. It is an early example of a reinforced-concrete open spandrel arch and was reputedly one of the longest single-span co... More
City Waterway Bridge, Spanning City Waterway at State Route 509, Tacom...
Significance: The City Waterway Bridge is an early example of a vertical lift bridge, designed by the renowned firm of Waddell and Harrington. Three features made it remarkable, if not unique among vertical li... More
Spokane River Bridge at Fort Spokane, Spanning Spokane River at State ...
Significance: This bridge was one of two steel cantilever spans that the Washington Department of Highways constructed to replace structures flooded by the waters rising behind Grand Coulee Dam. / The Spokane R... More
Columbia River Bridge at Bridgeport, State Route 17 spanning Columbia ...
Significance: This bridge is the only large-scale steel truss built in Washington immediately after World War II. Like the Columbia River Bridge at Grand Coulee Dam (HAER No. WA-102), it was a federal structur... More
McMillin Bridge, Spanning Puyallup River at State Route 162, McMillin,...
Significance: This is a rare example of a reinforced-concrete through truss bridge. The form of its members and details are unique. At the time of its construction it was thought to be the longest concrete tr... More
McMillin Bridge, Spanning Puyallup River at State Route 162, McMillin,...
Significance: This is a rare example of a reinforced-concrete through truss bridge. The form of its members and details are unique. At the time of its construction it was thought to be the longest concrete tr... More
South Hamma Hamma River Bridge, Spanning Hamma Hamma River at U.S. Rou...
Significance: The South Hamma Hamma River Bridge is one of two identical bridges spanning the north and south branches of the Hamma Hamma River (the other is the North Hamma Hamma River Bridge, HAER No. WA-97).... More
Yale Bridge, State Route 503 Spanning Lewis River, Yale, Cowlitz Count...
Significance: The Yale Bridge is the only steel short-span suspension bridge in the state, although there are many timber examples. It is rare in the sense that less expensive span types are usually chosen for... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Fairfax Bridge, Spanning Carbon River at State Route 165, Carbonado, P...
Significance: It is one of only two extant three-hinged steel arches in the state of Washington. / The building of the Fairfax Bridge across the Carbon River canyon in 1921 was the culmination of years of earne... More
Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Dosewallips River Bridge, U.S. Route 101 spanning Dosewallips River, B...
Significance: The Dosewallips River Bridge is an example of a riveted through Pettit truss with sub-struts and polygonal top chord (Pennsylvania truss). It is possibly the earliest example of the standard 240'... More
Chehalis River Riverside Bridge, Spanning Chehalis River at State Rout...
Significance: The Chehalis River Riverside Bridge is a riveted Warren through truss with verticals. It was built to the new 240's standard bridge design devised by the Washington Department of Highways which s... More
Columbia River Bridge at Grand Coulee Dam, Spanning Columbia River at ...
Significance: The U.S. Bureau of Reclamation constructed this structure as part of the Grand Coulee Dam Columbia Basin Reclamation Project. It is a good example of 1930s steel cantilever bridge design in Washi... More
Baker River Bridge, Spanning Baker River at State Route 20, Concrete, ...
Significance: The bridge was the only link between the two halves of the city of Concrete. It is an early example of a reinforced-concrete open spandrel arch and was reputedly one of the longest single-span co... More
Baker River Bridge, Spanning Baker River at State Route 20, Concrete, ...
Significance: The bridge was the only link between the two halves of the city of Concrete. It is an early example of a reinforced-concrete open spandrel arch and was reputedly one of the longest single-span co... More
City Waterway Bridge, Spanning City Waterway at State Route 509, Tacom...
Significance: The City Waterway Bridge is an early example of a vertical lift bridge, designed by the renowned firm of Waddell and Harrington. Three features made it remarkable, if not unique among vertical li... More
Columbia River Bridge at Bridgeport, State Route 17 spanning Columbia ...
Significance: This bridge is the only large-scale steel truss built in Washington immediately after World War II. Like the Columbia River Bridge at Grand Coulee Dam (HAER No. WA-102), it was a federal structur... More
McMillin Bridge, Spanning Puyallup River at State Route 162, McMillin,...
Significance: This is a rare example of a reinforced-concrete through truss bridge. The form of its members and details are unique. At the time of its construction it was thought to be the longest concrete tr... More
Hoquiam River Bridge, U.S. Route 101 (Simpson Avenue) spanning Hoquiam...
Significance: The central span is an example of a patented double-leaf Strauss underneath counterweight bascule bridge. The Strauss Bascule Bridge Company was one of the most important bridge building firms in... More
Hoquiam River Bridge, U.S. Route 101 (Simpson Avenue) spanning Hoquiam...
Significance: The central span is an example of a patented double-leaf Strauss underneath counterweight bascule bridge. The Strauss Bascule Bridge Company was one of the most important bridge building firms in... More
Hoquiam River Bridge, U.S. Route 101 (Simpson Avenue) spanning Hoquiam...
Significance: The central span is an example of a patented double-leaf Strauss underneath counterweight bascule bridge. The Strauss Bascule Bridge Company was one of the most important bridge building firms in... More
Yale Bridge, State Route 503 Spanning Lewis River, Yale, Cowlitz Count...
Significance: The Yale Bridge is the only steel short-span suspension bridge in the state, although there are many timber examples. It is rare in the sense that less expensive span types are usually chosen for... More
Yale Bridge, State Route 503 Spanning Lewis River, Yale, Cowlitz Count...
Significance: The Yale Bridge is the only steel short-span suspension bridge in the state, although there are many timber examples. It is rare in the sense that less expensive span types are usually chosen for... More
Montlake Bridge, Spanning Montlake Cut at State Route 513, Seattle, Ki...
Significance: This bridge, a Seattle landmark, is one of six bascule bridges based on a design developed by the City of Seattle which was derived from the Chicago bascule bridge type. It is unique because of i... More
Louisiana State University, Livestock Judging Pavilion, Louisiana Stat...
1989 Charles E. Peterson Prize, First Place Significance: The LSU Livestock Judging Pavilion was constructed in 1923 at a cost of $62,000. It was one of the first group of 21 buildings built on the campus, all... More
Louisiana State University, Livestock Judging Pavilion, Louisiana Stat...
1989 Charles E. Peterson Prize, First Place Significance: The LSU Livestock Judging Pavilion was constructed in 1923 at a cost of $62,000. It was one of the first group of 21 buildings built on the campus, all... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Tacoma Narrows Bridge, Spanning Narrows at State Route 16, Tacoma, Pie...
Significance: The Tacoma Narrows Bridge was the first suspension span constructed in the United States after its predecessor's failure in 1940 from wind-induced torsional oscillations. Research of design flaws... More
Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake Riv...
Significance: The oldest extant steel cantilever bridge in Washington. It is a good example of early-twentieth century cantilever bridge construction using carbon steel. The structure served first at Vantage Fe... More
Lake Keechelus Snowshed Bridge, Interstate 90, Hyak, Kittitas County, ...
Significance: The Lake Keechelus Snowshed is the only concrete snowshed in Washington. It is significant as an early example of a structure built through the use of an innovative technique that involved the co... More
Columbia River Bridge at Grand Coulee Dam, Spanning Columbia River at ...
Significance: The U.S. Bureau of Reclamation constructed this structure as part of the Grand Coulee Dam Columbia Basin Reclamation Project. It is a good example of 1930s steel cantilever bridge design in Washi... More