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Sauvie Island Bridge : ウィキペディア英語版 | Sauvie Island Bridge
The Sauvie Island Bridge crosses the Multnomah Channel of the Willamette River near Portland, Oregon, United States. The original Parker truss bridge, built in 1950 with a main span, was replaced with a tied arch bridge with a span in 2008 due to cracks discovered in 2001. ==Old bridge== Opened on December 30, 1950, the first bridge to Sauvie Island replaced the Sauvie Island Ferry. The $900,000 bridge was designed by the Oregon Department of Transportation and built by Gilpin Construction. Oregon transferred ownership to Multnomah County in 1951. Composed of three steel truss spans, it was a total of long, with the main span measuring in length. The approach spans were built of reinforced concrete girders. Green in color, the bridge was wide and carried two lanes of traffic and had sidewalks on both sides. The main span, a Parker truss, sat above the water line and handled an average of 3,800 vehicles per day.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Sauvie Island Bridge」の詳細全文を読む
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