The Fremont Bridge is a steel

tied-arch bridge A tied-arch bridge is an arch bridge in which the outward horizontal forces of the arch(es) caused by tension at the arch ends to a foundation are countered by equal tension of its own gravity plus any element of the total deck structure such grea ...

over the

Willamette River The Willamette River ( ) is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is long, lying entirely in northwestern Oregon in the United States. Flowing northward b ...

located in

Portland, Oregon Portland (, ) is a port city in the Pacific Northwest and the largest city in the U.S. state of Oregon. Situated at the confluence of the Willamette and Columbia rivers, Portland is the county seat of Multnomah County, the most populous ...

, United States. It carries Interstate 405 and

US 30 U.S. Route 30 or U.S. Highway 30 (US 30) is an east–west main route in the system of the United States Numbered Highways, with the highway traveling across the northern tier of the country. With a length of , it is the third longest ...

traffic between downtown and North Portland where it intersects with

Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Californi ...

. It has the longest main span of any bridge in

Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...

and is the second longest tied-arch bridge in the world (after

Caiyuanba Bridge The Caiyuanba Bridge is an arch bridge which crosses the Yangtze River in Chongqing, China. Completed in 2007, the arch spans ranking among the longest arch bridges in the world. The bridge carries 6 lanes of traffic and two tracks of Chongqi ...

across the

Yangtze River The Yangtze or Yangzi ( or ; ) is the longest river in Asia, the third-longest in the world, and the longest in the world to flow entirely within one country. It rises at Jari Hill in the Tanggula Mountains (Tibetan Plateau) and flows ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slig ...

). The bridge was designed by Parsons, Brinckerhoff, Quade and Douglas, and built by Murphy Pacific Corporation. The bridge has two decks carrying vehicular traffic, each with four lanes. The upper deck is signed westbound on US 30 and southbound on I-405. The lower deck is signed eastbound on US 30 and northbound on I-405.

Design and construction

Due to the public's dissatisfaction with the appearance of the

Marquam Bridge 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. ...

, the Portland Art Commission was invited to participate in the design process of the Fremont. The improvement in visual quality resulted in a bridge that was nearly six times as expensive as the purposely economical Marquam Bridge. Designers modeled the bridge after the original 1964

Port Mann Bridge The Port Mann Bridge is a 10-lane cable-stayed bridge in British Columbia, Canada that opened to traffic in 2012. Carrying 10 lanes of traffic with space reserved for a light rail line, it is the second widest bridge, after the San Francisco-O ...

Vancouver, British Columbia Vancouver ( ) is a major city in western Canada, located in the Lower Mainland region of British Columbia. As the most populous city in the province, the 2021 Canadian census recorded 662,248 people in the city, up from 631,486 in 2016. The ...

. The steel tie-girder (

I-beam An I-beam, also known as H-beam (for universal column, UC), w-beam (for "wide flange"), universal beam (UB), rolled steel joist (RSJ), or double-T (especially in Polish, Bulgarian, Spanish, Italian and German), is a beam with an or -shap ...

) is tall and wide. On October 28, 1971, while still under construction, a crack was found on the west span of this girder that required a $5.5 million redesign and repair. The ramps and approaches are steel box girders. If the lanes of the bridge were placed end-to-end, there are on the arch bridge and on the ramps and approaches. The center span of the bridge, where the rib of the arch is above the deck, is long. It was fabricated in

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

then assembled at

Swan Island Industrial Park The Swan Island Industrial Park is an industrial park on Swan Island in Portland, Oregon, United States. The industrial park comprises and is operated by the Port of Portland. History During World War II, Swan Island was the site of the Kais ...

, downstream. After assembly it was floated on a

barge Barge nowadays generally refers to a flat-bottomed inland waterway vessel which does not have its own means of mechanical propulsion. The first modern barges were pulled by tugs, but nowadays most are pushed by pusher boats, or other vessels. ...

the 1.7 mile trip to the construction site. On March 16, 1973, the steel arch span was lifted using 32 hydraulic jacks. At the time, it was listed in the

Guinness Book of World Records ''Guinness World Records'', known from its inception in 1955 until 1999 as ''The Guinness Book of Records'' and in previous United States editions as ''The Guinness Book of World Records'', is a reference book published annually, listing world ...

as the heaviest lift ever completed. The bridge was opened on November 15, 1973,"Fremont Bridge opens with wheeze". ''

The Oregonian ''The Oregonian'' is a daily newspaper based in Portland, Oregon, United States, owned by Advance Publications. It is the oldest continuously published newspaper on the U.S. west coast, founded as a weekly by Thomas J. Dryer on December 4, 18 ...

'', November 16, 1973, p. 22. at a final cost of $82 million (equivalent to $ million in ), most of which was financed by the

Federal Highway Administration The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program ...

. In 1976, an American flag and an Oregon flag were added atop the structure as part of the bicentennial celebration for the United States."News Q&A", ''

'', May 1, 2005. The flags were installed with the use of a

helicopter A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. These attribu ...

. The flags are attached to tall flagpoles at the crest of the arches.

Falcon nest

The Fremont Bridge was also the 26th

Peregrine falcon The peregrine falcon (''Falco peregrinus''), also known as the peregrine, and historically as the duck hawk in North America, is a cosmopolitan bird of prey (raptor) in the family Falconidae. A large, crow-sized falcon, it has a blue-grey bac ...

nest site designated in Oregon in 1995 after the raptor was placed on the U.S. Threatened and

Endangered Species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv ...

list in 1970.

Etymology

The bridge as well as Portland's associated Fremont Street were named for

John C. Fremont John is a common English name and surname: * John (given name) * John (surname) John may also refer to: New Testament Works * Gospel of John, a title often shortened to John * First Epistle of John, often shortened to 1 John * Second E ...

(1813–1890). Fremont was an early explorer of the

Oregon Country Oregon Country was a large region of the Pacific Northwest of North America that was subject to a long dispute between the United Kingdom and the United States in the early 19th century. The area, which had been created by the Treaty of 1818, co ...

. He served in the

United States Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, ...

at the time as a Captain and later promoted to General. In 1856, he ran for president, but was defeated by

James Buchanan James Buchanan Jr. ( ; April 23, 1791June 1, 1868) was an American lawyer, diplomat and politician who served as the 15th president of the United States from 1857 to 1861. He previously served as secretary of state from 1845 to 1849 and repr ...

.Snyder, Eugene E.. ''Portland Names and Neighborhoods: Their Historic Origin''. Portland:

Binford & Mort Binford & Mort Publishing is a book publishing company located in Hillsboro, Oregon, United States. Founded in 1930, the company was previously known as Metropolitan Press and Binfords & Mort. At one time they were the largest book publisher in the ...

, 1979. p.133.

Gallery

References

External links