Ross Island Bridge
Coordinates: 45 ° 30 ′ 5 " N , 122 ° 39 ′ 51" W.
| Ross Island Bridge | ||
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| use |
US Highway 
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| Crossing of | Willamette River | |
| Subjugated |
Interstate State Highway 
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| place | Portland , Oregon | |
| Entertained by | ODOT | |
| Building number | OR 05054 | |
| construction | Truss - cantilever bridge made of steel | |
| overall length | 1130 m | |
| width | 13 m | |
| Longest span | 163 m | |
| height | 37.50 m | |
| Clear height | 36.50 m | |
| vehicles per day | 50,600 (2014) | |
| building-costs | US $ 1.9 million | |
| start of building | 1925 | |
| completion | 1926 | |
| opening | December 21, 1926 | |
| planner | Gustav Lindenthal | |
| location | ||
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Ross Iceland Bridge is a road bridge over the Willamette River in the city of Portland in the US state of Oregon .
location
The bridge is south of downtown Portland at river mile 14 (14 miles from the mouth) of the Willamette River. It connects Portland's Southeast (Southeast) and Southwest (Southwest) sections. US Highway 26 runs over the bridge . The foothills of the bridge also cross Interstate 5 (I-5) west of the Willamette River and State Highway OR 99E along the east bank of the river .
South of the bridge is Ross Island, a river island populated by an Oregon pioneer named Sherry Ross , after which the bridge is named. However, the bridge does not touch the island and does not provide access to it. About 500 m north of the Ross Island Bridge, Tilikum Crossing , a tram, pedestrian and cyclist bridge, crosses the Willamette River, and about 500 m further north is the double- deck Marquam Bridge , a motorway bridge for the I-5.
history
The bridge was built as part of a bridge construction program in Portland in the early 1920s that also included the Burnside Bridge and the Sellwood Bridge . After a first draft of an arch bridge of concrete envisaged, had been rejected, from designing Brno in Moravia native bridge construction engineer Gustav Lindenthal the current bridge. Construction started in 1925 and finished in 1926. The construction of the bridge cost around US $ 1.9 million. The developer and owner of the bridge was Multnomah County . The bridge was opened on December 21, 1926.
The bridge was originally painted black, but in 1955–56 it was repainted green. After the architect Lewis Crutcher suggested in 1961 that the Portland bridges should be painted different colors, the Ross Island Bridge was painted blue in 1965. In 1976 ownership of the bridge passed to the Oregon Department of Transportation (ODOT), the Oregon State Department of Transportation .
In the years 2000–2001 the bridge was completely renovated. The bridge deck and railings were replaced and the drainage system and lighting improved. During the work it was discovered that the original paint had used lead-based paint that had to be removed. This delayed the work for several months and the costs rose from the original US $ 9.6 million to US $ 12.2 million. Eventually the bridge was repainted in the blue paint used in 1965.
description
Even if the bridge looks like a truss - arch bridge at first glance , its construction is a truss - cantilever bridge made of steel with an overhead deck , a type of bridge that is rather rare in Oregon.
The main bridge over the river is approximately 554 meters long and has a maximum span of 163 meters. With the two-sided extensions across the streets, the total length is 1130 meters. In the middle, the bridge rises 37.50 meters above the surface of the water, the clear height is 36.50 meters.
The total width of the bridge is 15.85 meters, the bridge deck is 13 meters wide. US Highway 26 , which runs over the bridge, is four lanes with two lanes in each direction. At the northern edge of the bridge, a sidewalk runs along the street. As of 2014, 50,600 vehicles cross the bridge every day.
The bridge is maintained by the Oregon Department of Transportation (ODOT). It is registered there under the structure number OR 05054.
literature
- Sharon Wood Wortman: The Portland Bridge Book . 3rd ed. Urban Adventure Press, 2006, ISBN 978-0-9787365-1-4 .
- Dwight A. Smith; James B. Norman; Pieter T. Dykman: Ross Island Bridge . In: Historic Highway Bridges of Oregon . 2nd Edition. Oregon Historical Society, Portland 1989, ISBN 978-0-87595-205-5 , pp. 78 .
Web links
- Ross Island Bridge. In: Structurae
- Ross Island Bridge . In: Bridgehunter (English)
- Frank Griggs: Ross Island Bridge . In: STRUCTURE magazine, August 2017 (English)
Individual evidence
- ^ Ross Island Bridge. In: Geographic Names Information System. Retrieved January 3, 2018 (American English).
- ^ A b Frank Griggs: Ross Island Bridge. In: STRUCTURE magazine. August 2017, accessed on 27 December 2018 (American English).
- ^ A b Ross Island Bridge, Portland. In: www.emporis.com. Accessed December 26, 2018 .
- ↑ a b Ross Island Bridge. In: www.bridgestories.com. Accessed December 26, 2018 .
- ↑ a b c Ross Island Bridge. In: structurae.de. Retrieved December 26, 2018 .
- ^ Rainbows cost money . In: The Oregonian . January 16, 1957, p. 14 (editorial).
- ↑ Orange-Red Bridge . In: The Oregonian . May 28, 1962, p. 16 (editorial).
- ^ Don Hamilton: Bridge face-lift requires more cash, more time. In: Portland Tribune. April 13, 2001, archived from the original on September 26, 2007 ; accessed on December 27, 2018 (English).
- ↑ Portland Bridges. In: Portland Yacht Club. January 26, 2012, Retrieved December 26, 2018 (American English).
- ↑ a b c Ross Island Bridge. In: bridgehunter.com. Accessed December 26, 2018 .