The Interstate Bridge (also Columbia River Interstate Bridge, I-5 Bridge, Portland-Vancouver Interstate Bridge) is a pair of nearly identical steel vertical lift, through truss bridges that carry Interstate 5 traffic over the Columbia River between Vancouver, Washington, and Portland, Oregon, in the United States. First opened to traffic in 1917 with a second span opening in 1958, the bridge handles 124,500 vehicles (as of 2004). The green struct...
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The Interstate Bridge (also Columbia River Interstate Bridge, I-5 Bridge, Portland-Vancouver Interstate Bridge) is a pair of nearly identical steel vertical lift, through truss bridges that carry Interstate 5 traffic over the Columbia River between Vancouver, Washington, and Portland, Oregon, in the United States. First opened to traffic in 1917 with a second span opening in 1958, the bridge handles 124,500 vehicles (as of 2004). The green structure, which is over 3,500 ft (1000 m) long, carries traffic over three northbound lanes and three southbound lanes.
The bridge was built to replace an overcrowded ferry system operated by Pacific Railway, Light & Power Co. Construction on the bridge began in March 1915, following the sale of bonds. The first bridge was opened on February 14, 1917 at a cost of $1.75 million, which was shared between Clark County and Multnomah County. Clark County paid $500,000 with Multnomah County paying $1,250,000. The first bridge has a total of 13 steel...
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