A half viaduct is a type of viaduct built into a hillside, where only part of the road is supported by the structure. [1]
A half viaduct is a type of viaduct built into a hillside, where only part of the road is supported by the structure. [1]
A viaduct is a specific type of bridge that consists of a series of arches, piers or columns supporting a long elevated railway or road. Typically a viaduct connects two points of roughly equal elevation, allowing direct overpass across a wide valley, road, river, or other low-lying terrain features and obstacles. The term viaduct is derived from the Latin via meaning "road", and ducere meaning "to lead". It is a 19th-century derivation from an analogy with ancient Roman aqueducts. Like the Roman aqueducts, many early viaducts comprised a series of arches of roughly equal length.
The Steel Bridge is a through truss, double-deck vertical-lift bridge across the Willamette River in Portland, Oregon, United States, opened in 1912. Its lower deck carries railroad and bicycle/pedestrian traffic, while the upper deck carries road traffic, and light rail (MAX), making the bridge one of the most multimodal in the world. It is the only double-deck bridge with independent lifts in the world and the second oldest vertical-lift bridge in North America, after the nearby Hawthorne Bridge. The bridge links the Rose Quarter and Lloyd District in the east to Old Town Chinatown neighborhood in the west.
The Pearl District is an area of Portland, Oregon, formerly occupied by warehouses, light industry and railroad classification yards and now noted for its art galleries, upscale businesses and residences. The area has been undergoing significant urban renewal since the mid-1980s when it was reclassified as mixed use from industrial, including the arrival of artists, the removal of a viaduct and construction of the Portland Streetcar. It now consists of industrial building conversion to offices, high-rise condominiums and warehouse-to-loft conversions.
State Route 99 (SR 99), also known as the Pacific Highway, is a state highway in the Seattle metropolitan area, part of the U.S. state of Washington. It runs 49 miles (79 km) from Fife to Everett, passing through the cities of Federal Way, SeaTac, Seattle, Shoreline, and Lynnwood. The route primarily follows arterial streets, including Aurora Avenue, and has several freeway segments, including the tolled SR 99 Tunnel in Downtown Seattle. SR 99 was officially named the William P. Stewart Memorial Highway by the state legislature in 2016, after a campaign to replace an unofficial moniker honoring Confederate president Jefferson Davis.
Crown Point is a basalt promontory on the Columbia River Gorge and an associated state park in the U.S. state of Oregon. It is located in eastern Multnomah County, approximately 15 miles (24 km) east of Portland. Crown Point is one of the scenic lookouts along the Historic Columbia River Highway, providing a panoramic view of part of the Columbia River. It stands 733 feet (223
The Millau Viaduct is a multispan cable-stayed bridge completed in 2004 across the gorge valley of the Tarn near Millau in the Aveyron department in the Occitanie Region, in Southern France. The design team was led by engineer Michel Virlogeux and English architect Norman Foster. As of October 2023, it is the tallest bridge in the world, having a structural height of 343 metres (1,125 ft).
The Marquam Bridge is a double-deck, steel-truss cantilever bridge that carries Interstate 5 traffic across the Willamette River from south of downtown Portland, Oregon, on the west side to the industrial area of inner Southeast on the east. It is the busiest bridge in Oregon, carrying 140,500 vehicles a day as of 2016. The upper deck carries northbound traffic; the lower deck carries southbound traffic. The Marquam also has on and off ramps for Interstate 405 on the south end of the bridge, while the terminus on the east bank of the river is near the interchange with Interstate 84.
The Broadway Bridge is a Rall-type bascule bridge spanning the Willamette River in Portland, Oregon, United States, built in 1913. It was Portland's first bascule bridge, and it continues to hold the distinction of being the longest span of its bascule design type in the world. It was added to the National Register of Historic Places in November 2012.
The Ross Island Bridge is a cantilever truss bridge that spans the Willamette River in Portland, Oregon. It carries U.S. Route 26 across the river between southwest and southeast Portland. The bridge opened in 1926 and was designed by Gustav Lindenthal and honors Oregon pioneer Sherry Ross. It is named for its proximity to Ross Island. Although it looks like a deck arch bridge, it is a cantilever deck truss bridge, a rare type in Oregon.
The National Register of Historic Places in the United States is a register including buildings, sites, structures, districts, and objects. The Register automatically includes all National Historic Landmarks as well as all historic areas administered by the U.S. National Park Service. Since its introduction in 1966, more than 97,000 separate listings have been added to the register.
The American Bridge Company is a heavy/civil construction firm that specializes in building and renovating bridges and other large, complex structures. Founded in 1900, the company is headquartered in Coraopolis, Pennsylvania, a suburb of Pittsburgh. The firm has built many bridges in the U.S. and elsewhere; the Historic American Engineering Record notes at least 81. American Bridge has also built or helped build the Willis Tower, the Empire State Building, the Chrysler Building, launch pads, resorts, and more. During World War II, it produced tank landing ships (LSTs) for the United States Navy. In 2020, American Bridge Company was acquired by Southland Holdings LLC.
Oregon Route 58, also known as the Willamette Highway No. 18, is a state highway in the U.S. state of Oregon. The route, signed east–west, runs in a southeast–northwest direction, connecting U.S. Route 97 north of Chemult with Interstate 5 south of Eugene. It links the Willamette Valley and Central Oregon, crossing the Cascade Range at Willamette Pass. OR 58 is generally a modern two-lane highway with a speed limit of 55 mph (88 km/h), built through the Willamette National Forest in the 1930s.
The Digswell Viaduct, also called Welwyn Viaduct, is a railway viaduct that carries the East Coast Main Line over the River Mimram in the county of Hertfordshire in England. A prominent local landmark, it is located between Welwyn Garden City and Digswell. It is just to the south of Welwyn North railway station.
The Vista Bridge is an arch bridge for vehicles and pedestrians located in Portland, Oregon, United States. It connects the areas of King's Hill and Vista Ridge which are both in the Goose Hollow neighborhood. The MAX Light Rail line and Jefferson Street/Canyon Road travel under the bridge, and Vista Avenue crosses the bridge.
The Park Avenue Viaduct, also known as the Pershing Square Viaduct, is a roadway in Manhattan, New York City. It carries vehicular traffic on Park Avenue from 40th to 46th Streets. The viaduct is composed of two sections: a steel viaduct with two roadways from 40th to 42nd Streets, as well as a pair of roadways between 42nd and 46th Streets. The section from 40th to 42nd Streets was designated a New York City landmark in 1980 and was listed on the National Register of Historic Places in 1983. The street-level service roads of Park Avenue, which flank the viaduct between 40th and 42nd Streets, are called Pershing Square. The section of the viaduct between 42nd and 46th Streets travels around Grand Central Terminal and the MetLife Building, then through the Helmsley Building; all three buildings lie across the north–south axis of the avenue.
Lewis and Clark Bridge may refer to:
The Dr. Noble Wiley Jones House is a house located in the Goose Hollow neighborhood of southwest Portland, Oregon. Built in 1911, the house was listed on the National Register of Historic Places in 1988.
The Lovejoy Columns, located in Portland, Oregon, United States, supported the Lovejoy Ramp, a viaduct that from 1927 to 1999 carried the western approach to the Broadway Bridge over the freight tracks in what is now the Pearl District. The columns were painted by Greek immigrant Tom Stefopoulos between 1948 and 1952. In 1999, the viaduct was demolished but the columns were spared due to the efforts of the architectural group Rigga. For the next five years, attempts to restore the columns were unsuccessful and they remained in storage beneath the Fremont Bridge.
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