The Interstate Bridge (also Columbia River Interstate Bridge, I-5 Bridge, Portland-Vancouver Interstate Bridge, Vancouver-Portland Bridge) is a pair of nearly identical steel vertical-lift, Parker through-truss bridges that carry Interstate 5 traffic over the Columbia River between Vancouver, Washington and Portland, Oregon in the United States. The bridge opened to traffic in 1917 as a single bridge carrying two-way traffic. A second, twin bridge opened in 1958 with each bridge carrying one-way traffic. The original 1917 structure is the northbound bridge. As of 2006, the bridge pair handles around 130,000 vehicles daily. The green structure, which is over long, carries traffic over three northbound lanes and three southbound lanes. It was added to the National Register of Historic Places in 1982, as the "Portland–Vancouver Highway Bridge". Since 2005, proposals for replacing the bridge have been produced and debated. The bridge is considered responsible for traffic congestion of road vehicles and river traffic. Plans for a replacement bridge, known as the Columbia River Crossing (CRC) project, estimated to cost at least $3.4 billion, had come together by 2012 after many delays, but were very controversial, with both strong support and strong opposition. In late June 2013, the CRC project was canceled, after the Washington state legislature declined to authorize funding for the project. The Interstate Bridge Replacement Program, a joint effort between ODOT, WSDOT, Federal Highway Administration, Federal Transit Administration, Metro, Southwest Washington Regional Transportation Council, the cities of Portland and Vancouver, the Port of Portland, and the Port of Vancouver USA, was relaunched in 2017. First bridge Before a permanent crossing existed between Portland and Vancouver, there was an overcrowded ferry system operated by Pacific Railway, Light & Power Co. Plans for the original bridge began as early as 1912, with local efforts leading to an initial survey and bond measures totaling $2,000,000; $1.5 million contributed from Portland, and $500,000 from Vancouver. Waddell & Harrington were retained as the project's consulting engineers. Construction on the bridge began in March 1915, and the structure opened on February 14, 1917 at a final cost of $1.75 million (equivalent to $ million in ), which was shared between Clark and Multnomah counties. Clark County paid $500,000 and Multnomah County paid $1.25 million—probably proportional to population. The first bridge has a total of 13 steel spans, with three measuring in length and the remaining ten spans each. Piers sit atop pile caps on wooden pilings