A cantilever bridge is a bridge built using structures that project horizontally into space, supported on only one end. For small footbridges, the cantilevers may be simple beams; however, large cantilever bridges designed to handle road or rail traffic use trusses built from structural steel, or box girders built from prestressed concrete.
The Conde B. McCullough Memorial Bridge, is a cantilever bridge that spans the Coos Bay on U.S. Route 101 near North Bend, Oregon. When completed in 1936 it was named the North Bend Bridge. In 1947 it was renamed in honor of Conde B. McCullough who died May 5, 1946. This and 10 other major bridges on the Oregon Coast Highway were designed under his supervision.
The Yaquina Bay Bridge is an arch bridge that spans Yaquina Bay south of Newport, Oregon. It is one of the most recognizable of the U.S. Route 101 bridges designed by Conde McCullough and one of eleven major bridges on the Oregon Coast Highway designed by him. It superseded the last ferry crossing on the highway.
The Francis Scott Key Bridge, more commonly known as the Key Bridge, is a six-lane reinforced concrete arch bridge conveying U.S. Route 29 (US 29) traffic across the Potomac River between the Rosslyn neighborhood of Arlington County, Virginia, and the Georgetown neighborhood of Washington, D.C. Completed in 1923, it is Washington's oldest surviving road bridge across the Potomac River.
The Lamar Boulevard Bridge is a historic arch bridge carrying Texas State Highway Loop 343 over Lady Bird Lake in downtown Austin, Texas, United States. The bridge features six open-spandrel concrete arches spanning 659 feet (201 m) and carries tens of thousands of vehicles daily across the lake. Completed in 1942, the Lamar Boulevard Bridge was the second permanent bridge to cross the Colorado River, and one of the last Art Deco-style open-spandrel concrete arch bridges built in Texas. The bridge was named an Austin Landmark in 1993 and added to the National Register of Historic Places in 1994.
The Kettle Falls Bridges is the collective name for a pair of steel cantilever bridges carrying State Route 20/U.S. Route 395 and the Kettle Falls International Railway across the Columbia River at Kettle Falls, Washington. The south bridge carries motor vehicle traffic while the similar northern span is used for rail.
The Grand Coulee Bridge, or Columbia River Bridge at Grand Coulee Dam, is a through-cantilever steel truss bridge built in 1934–35. It carries State Route 155 across the Columbia River immediately below Grand Coulee Dam, near the city of Grand Coulee, Washington. It was added to the National Register of Historic Places in 1982.
The Yale Bridge or Lewis River Bridge spans the Lewis River near Yale, Washington. It was built in 1932 by Cowlitz and Clark counties. The suspension bridge has a clear span of 300 feet (91 m), with a total length of 532 feet (162 m), replacing a previous steel truss bridge at the site. Construction of the Ariel Dam had created Lake Merwin with a water depth of 90 feet (27 m) at the site, requiring a new bridge that did not need to have support piers in the water. The road deck, stiffened by a steel Warren truss, is 50 feet (15 m) above the high water line of the reservoir.
The Senator George Sellar Bridge at Wenatchee, Washington was built in 1950 as the "Columbia River Bridge" to carry U.S. Route 2 across the Columbia River.
The Columbia River Bridge at Wenatchee, Washington, also known as the Old Wenatchee Bridge, was built by the Washington Bridge Company in 1908, primarily as a means to carry irrigation water pipelines across the Columbia River. It was the first road bridge over the Columbia south of Canada. The bridge is a pin-connected cantilever truss, 1,600 feet (490 m) long, with one 200-foot (61 m) Pratt truss between two 160-foot (49 m) cantilever arms, with 240-foot (73 m) side arms and a 60 feet (18 m) girder span. The bridge was purchased by the Washington highway department for $182,000 for highway use. As originally built, the bridge carried a 20.5-foot (6.2 m) wide timber roadway, with additional ability to carry a street railway. However, the east approach to the bridge was built at a 6% grade, limiting its potential.
The Columbia River Bridge, also known as the Bridgeport Bridge, at Bridgeport, Washington, was built to span the Columbia River in 1950. Composed of three spans, the bridge is a steel continuous riveted deck truss carrying Washington State Route 17 on a 26-foot-wide (7.9 m) roadway and two 3-foot (0.91 m) sidewalks. The center portion of the bridge spans 300 feet (91 m), flanked by 250-foot (76 m) end spans. The 70-foot (21 m) north approach span and the 100-foot (30 m) south approach span are supported by steel plate girders. The bridge played a significant role in the construction of the Chief Joseph Dam just upstream, as no bridge crossing had previously existed in the area. Construction on the dam started in 1945 and was completed, apart from the powerplant, in 1955. The bridge was designed and built by the U.S. Army Corps of Engineers as part of the Chief Joseph Dam project, and is significant for its association with the project and as a major crossing of the Columbia.
Patton Bridge is a bridge located in Auburn, Washington listed on the National Register of Historic Places. The bridge spans the Green River near metropolitan Auburn, Washington. It was designed by bridge engineer and designer Homer M. Hadley. The combination of concrete and steel box girders employed in the bridge's represents a variation of the box girder bridge style. The Patton Bridge was the only structure built between 1941 and 1950, which exhibits this innovative modification of the box girder design.
The Jefferson Street Viaduct is an historic structure located in Ottumwa, Iowa, United States. The riveted Warren deck truss bridge was completed in 1936. It was listed on the National Register of Historic Places in 1998 as a part of the Highway Bridges of Iowa MPS.
The AJX Bridge is a historic Pratt truss bridge in southwestern Johnson County, Wyoming. The bridge was built in 1931 across the South Fork of the Powder River near Kaycee, Wyoming. AJX Bridge was built to provide a river crossing for U.S. Route 87. It was placed on the National Register of Historic Places in 1985 as part of a Multiple Property Submission devoted to historic bridges in Wyoming.
The Newport Bridge is a historic cantilevered Warren truss bridge over the White River in Newport, Arkansas. Built in 1930 to carry U.S. Route 67 (US 67), the road it carries is now designated Arkansas Highway 367 (AR 367) after the former highway was relocated. The main bridge is 400 feet (120 m) long, with approaches from the west of 1,278 feet (390 m) and the south of 911 feet (278 m). It has cantilevered arms 138 feet (42 m) long supported by concrete piers, with a suspended Warren truss span of 125 feet (38 m). Designed by Ira G. Hedrick, it is one of three such bridges in the state.
The Hassayampa Bridge is a bridge spanning the Hassayampa River in Hassayampa, Arizona, located in Maricopa County. The bridge was completed in 1929 and was listed on the National Register of Historic Places in 1988. The bridge was scheduled for demolition in 1983.
The Burwell Bridge was a historic bridge on the northern edge of Burwell in Garfield County, Nebraska which was built in 1940–41. It was a steel girder bridge that brings Nebraska Highway 11 over the North Loup River. It is also known as the North Loup River Bridge and denoted as NEHBS Number GFOO-13. It was listed on the National Register of Historic Places in 1992, and was delisted in 2019.
The Grande Ronde River Bridge, near Asotin in Asotin County in southeast Washington, is a riveted steel girder bridge which was built in 1941. It is notable as the first, or one of the first, steel girder bridges in the Washington State highway system, and was a prototype for later ones. It was listed on the National Register of Historic Places in 1995.
The West Fifth Street Bridge is a historic cantilever concrete girder bridge in downtown Austin, Texas. Built in 1931, the bridge carries Fifth Street across Shoal Creek to link central Austin with neighborhoods that were then the city's western suburbs. It is one of only a handful of curved cantilever girder bridges in Texas, built as part of the city's 1928 master plan for urban development and beautification. The bridge was added to the National Register of Historic Places in 2019.
The East Navidad River Bridge, also known as the State Highway 3 Bridge at East Navidad River, is a historic concrete bridge that carries FM 1579 across the East Navidad River about 3.4 miles (5.5 km) east of Schulenberg in Fayette County, Texas. The 199-foot-long (61 m) cantilever bridge has a 70-foot (21 m) center span. Concrete piers and abutments support the two cantilever arms. The total width of the bridge is 21.17 feet (6.45 m), providing an 18-foot-wide (5.5 m) roadway. The bridge gives the appearance of an arch but is in fact two cantilevered arms joined in the center of the main span and anchored and countered at the ends. Concrete piers with skewed abutments provide support.
