|
Indian Timothy Memorial Bridge (WA-85) |
 |
U.S. Route 12 spanning Alpowa Creek - Silcott vicinity, Asotin County
Built 1923
|
This bridge was dedicated to Ta-Moot-Tsoo (Chief Timothy), a Nez Perce Indian (1800‚1891) who was friendly with early settlers and was credited with saving the lives of Colonel Edward J. Steptoe's troops in 1858 after their defeat in the Battle of Tohotonimme, near Rosalia. The structure is a two-span, reinforced-concrete bridge similar in design to the "rainbow arch" popular in the Midwest in the 1910s and 1920s.
 top |
|
Vancouver‚ Portland Interstate Bridge (WA-86)
Also known as the Columbia River Interstate Bridge |
 |
|
Interstate 5 spanning the Columbia River - Vancouver, Clark County
Built 1915‚1917 (northbound) and 1956‚1958 (southbound)
|
|
The original 1917 bridge represented an enormous financial and engineering accomplishment, shared by Washington and Oregon. It was designed by the renowned engineering firm of Waddell & Harrington, leaders in the field of vertical lift bridge design in the twentieth century. The 1958 bridge was built as a twin structure to the original. The piers of this bridge were assembled from hollow precast segments.
top |
|
Snake River Bridge at Lyons Ferry (WA-88)
Also known as the Lyons Ferry Bridge or the Old Columbia River Bridge at Vantage |
 |
State Route 261 spanning the Snake River - Columbia River Starbuck vicinity, Columbia County.
Built 1927, moved 1968.
|
This is the oldest extant steel cantilever bridge in Washington. The bridge was moved from Vantage, WA, in 1968 where it carried the North Central Highway. It is a good example of early twentieth-century cantilever bridge construction using carbon steel.
top |
|
Longview Bridge (WA-89)
Also known as the Lewis & Clark Bridge or the Columbia River Bridge |
 |
State Route 433 spanning the Columbia River - Longview, Cowlitz County.
Built 1930
|
This bridge, designed by engineer Joseph B. Strauss, was at the time of its construction the longest cantilever span in North America with its 1200-foot central section. The requirement of extreme vertical and horizontal shipping channel clearances resulted in this imposing structure.
top |
|
Yale Bridge (WA-87)
Also known as the Lewis River Bridge |
 |
State Route 503 spanning the Lewis River - Yale vicinity, Cowlitz County
Built 1932, rebuilt 1957, 1958
|
This bridge is the only steel short-span suspension bridge in the state. It was built economically using cost-saving materials and construction techniques.
top |
|
Columbia River Bridge at Bridgeport (WA-90) |
 |
State Route 17 spanning the Columbia River - Bridgeport vicinity, Douglas County.
Built 1950
|
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, it was constructed as part of a federally sponsored hydroelectric dam project.
top |
|
Hoquiam River Bridge (WA-93)
Also known as the Simpson Avenue Bridge |
 |
Hoquiam River Bridge (WA-93) - (aka Simpson Avenue Bridge). U.S. Route 101 (Simpson Avenue) spanning the Hoquiam River Hoquiam, Grays Harbor County
Built 1928
|
The central span of this bridge is an example of a patented double-leaf Strauss underneath counterweight bascule structure. The Strauss Bascule Bridge Company was one of the most important bridge building firms in the United States during the early twentieth century.
top |
|
Wishkah River Bridge (WA-92) |
 |
U.S. Route 12 (Wishkah Street) spanning the Wishkah River Aberdeen, Grays Harbor County.
Built 1924 |
This structure is a classic example of a patented Strauss "heel-trunnion" bascule bridge.
top |
|
Dosewallips River Bridge (WA-94) |
 |
U.S. Route 101 spanning the Dosewallips River - Brinnon, Jefferson County
Built 1923 |
This bridge is an example of a riveted through Pettit truss with sub-struts and polygonal top chord (Pennsylvania truss).
top |
|
Aurora Avenue Bridge (WA-107)
Also known as the George Washington Memorial Bridge or the Lake Union Bridge |
 |
State Route 99 (Aurora Avenue) spanning the Lake Washington-Lake Union Ship Canal - Seattle, King County
Built 1932
|
Nearly 3000 feet long, this steel cantilever structure is one of Seattle's longest and tallest spans. It provided an important early crossing of the Lake Washington Ship Canal.
top |
|
Lacey V. Murrow Memorial Bridge (WA-2)
Also known as the Lake Washington Floating Bridge |
 |
Interstate 90 spanning Lake Washington - Seattle, King County
Built 1940, sunk in 1990 during refurbishing
|
Since construction, the bridge has been part of the major trunk route crossing the state and accessing Seattle from the east. This pontoon bridge was of unprecedented scale and sophistication and the first constructed of concrete. The concept for its construction was originally proposed by Homer M. Hadley, and designed by the Washington Toll Bridge Authority. The bridge was removed from the National Register of Historic Places when it sank. A replacement, new pontoon bridge using the original approaches is under construction; a second parallel floating structure was completed in 1989 to accommodate increasing traffic.
top |
|
Montlake Bridge (WA-108) |
 |
State Route 513 spanning the Lake Washington Ship Canal
Seattle, King County
Built 1925
View design drawing. |
This Seattle landmark is one of six bascule bridges based on a design derived from the Chicago bascule bridge type. This bridge is unique because of its trunnion supports, employed to avoid a patent infringement lawsuit by the Strauss Bascule Bridge Company, and its architectural treatment.
top |
|
Mount Baker Ridge Tunnel (WA-109) |
 |
Interstate 90 passing under Mount Baker Ridge - Seattle, King County
1940s design, constructed in 1980s - Westbound tunnel opening
|
In the context of Western tunneling, this structure is remarkable for both the material it was driven through (clay) and the form it took (twin bore). The tunnel ranks as the world's largest diameter soft earth tunnel. The highly stylized treatment of the east portal demonstrates a Modernistic Architecture applied to an engineering structure.
top |
|
Lake Keechelus Snowshed (WA-110) |
 |
Interstate 90 - 5.5 miles southeast of Hyak, Kittitas County
Built 1951
|
This structure is the only concrete snowshed in Washington. The snowshed prevents snow slides from closing the route during the winter. Its construction involved the combination of both precast and cast-in-place elements.
top |
|
Chehalis River Riverside Bridge (WA-111) |
 |
State Route 6 spanning the Chehalis River - Chehalis vicinity, Lewis County
Built 1939
|
This bridge is a riveted Warren through truss with verticals.
top |
|
South Fork Newaukum River Bridge (WA-112) |
 |
State Route 508 spanning the South Fork of the Newaukum River, Onalaska vicinity, Lewis County
Built 1930
|
This bridge is a good, virtually unaltered example of a riveted pony Warren truss with verticals.
top |
|
Spokane River Bridge at Fort Spokane (WA-113) |
 |
State Route 25 spanning the Spokane River Miles, Lincoln county
Built 1941
|
This bridge was one of two steel cantilever spans that were constructed to replace structures flooded by the waters rising behind Grand Coulee Dam.
top |
|
Spokane River Bridge at Long Lake Dam (WA-95) |
 |
State Route 231 spanning the Spokane River - Reardon vicinity, Lincoln County
Built 1949
|
The bridge is a late example of an open-spandrel reinforced-concrete ribbed deck arch. ConsidËre hinges were used at the skewbacks to relieve stresses in the arch during construction.
top |
|
North and South Hamma Hamma River Bridges (WA-97 & 96) |
 |
U.S. Route 101 spanning the Hamma Hamma River - Eldon, Mason County
Built 1923 and 1924
|
Two identical bridges spanning the north and south branches of the Hamma Hamma River are part of the main highway along the east side of the Olympic Peninsula. Each is a three-hinged reinforced-concrete through arch.
top |
|
Columbia River Bridge at Grand Coulee Dam (WA-102) |
 |
State Route 155 spanning the Columbia River - Coulee Dam, Okanogan County
Built 1935
|
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 Washington.
top |
|
City Waterway Bridge (WA-100)
Also known as the Thea Foss Waterway Bridge or the 11th Street Bridge |
 |
State Route 509 spanning the City Waterway - Tacoma, Pierce County
Built 1913
View design drawing
|
Designed by Waddell and Harrington, this bridge is an early example of a vertical lift bridge. Three features make it remarkable among vertical lift structures of the day: the unusually great height of the deck above the water, the employment of an overhead span designed for carry a water pipe, and its construction on a variable grade.
top |
|
Fairfax Bridge (WA-72)
Also known as the James R. O'Farrell Bridge or the Carbon River Bridge |
 |
State Route 165 spanning the Carbon River 2.8 mi. south of Carbonado, Pierce County - Built 1921
View design drawing
|
This structure is one of only two extant three-hinged steel arches in the state of Washington. Its 494-foot length consists of a 240-foot three-hinged spandrel braced rib deck arch, two 14-foot steel towers, and two timber trestle approach spans. All major structural components: the chords of the ribs, the posts of the towers, and the spandrel columns, are composite members employing extensive lattice work. This gives lightness to the structure and contributes to it fine visual quality. At the time of its construction it was the highest bridge in the state.
top |
|
McMillin Bridge (WA-73)
Also known as the Puyallup River Bridge |
 |
State Route 162 spanning the Puyallup River - McMillin, Pierce County
Built 1934
View design drawing |
This structure 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 truss or beam span in the country. The bridge was designed by Homer M. Hadley.
top |
|
Purdy Bridge (WA-101)
Also known as the Purdy Spit Bridge |
 |
State Route 302 spanning the strait between Henderson Bay and Burley Lagoon
Purdy vicinity, Pierce County
Built 1936
|
An example of a reinforced-concrete box-girder bridge, rare in the United States, this bridge was the longest of its kind when built.
top |
|
Tacoma Narrows Bridge (WA-99) |
 |
State Route 16 spanning the Tacoma Narrows - Tacoma, Pierce County
Built 1951
View design drawing
|
|
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 in the first Tacoma Narrows Bridge led to the use of aerodynamic testing as a standard procedure in suspension span structural analysis.
Tacoma Narrows Bridge Engineering Record (839k PDF)
top |
|
Baker River Bridge (WA-105)
Also known as the Henry Thompson Bridge |
 |
State Route 20 spanning the Baker River - City of Concrete, Skagit County
Built 1917
|
The bridge, the only link between the two halves of the city of Concrete, is an early example of a reinforced-concrete open spandrel arch and was reputedly one of the longest single-span concrete structures in the West when built. The bridge is ornamented in a classical style.
top |
|
Canoe Pass Bridge and Deception Pass Bridge (WA-104 & 103) |
 |
State Route 20 spanning Deception Pass - Anacortes vicinity, Skagit County
Built 1935
|
This Deception Pass steel cantilever and the Canoe Pass steel arch are examples of advanced steel bridge construction. They provide motor vehicle and pedestrian access to Whidbey Island.
top |
|
Columbia River Bridge at Kettle Falls (WA-91) |
 |
Kettle Falls vicinity, Stevens County - U.S. Route 395 spanning the Columbia River -
Built 1941 |
This bridge was one of two steel cantilever spans built to replace structures flooded by the waters rising behind the Grand Coulee Dam.
top |
|
Harpole Bridge (WA-133)
Also known as the Manning Bridge or the Curtis Lowe Bridge |
 |
Spanning the Palouse River - Colfax vicinity, Whitman County
Built 1922/1928
|
This bridge is a rare example of a wooden boxed-in Howe truss. It was built by the Great Northern Railway when it acquired the Spokane & Inland Empire Railway and upgraded the electric interurban railway to a steam line for freight use, hence the need for the heavy-timbered structure. Now converted to vehicular use, the Harpole bridge in the only extant structure of its type in Washington, and perhaps one of the few remaining in the country.
top |