History
Construction of a single-track railroad bridge at the same location was started in 1890, engineered by George S. Morison for the Portland & Puget Sound Railroad Company (affiliated with Union Pacific), but that project was abandoned at an early stage. In 1905, another crossing of the Columbia River was proposed, this time by the Northern Pacific Railway (NP), for use by the newly formed Portland & Seattle Railway. The Portland & Seattle had been formed jointly by NP and Great Northern Railway, to build and ultimately operate new railroad lines from Portland to Seattle and Portland to Spokane, but was renamed Spokane, Portland & Seattle Railway (SP&S) – in early 1908, before opening any track sections – after construction of the Portland–Spokane line got under way before the Seattle line. The planned new railroad was commonly referred to as the "North Bank road" (road being short for railroad or railroad line), or North Bank line, because the Seattle line would follow the Columbia River's north bank as far as Kelso and the Spokane line would also follow the north bank, running east from Vancouver. East from Portland, the south bank of the Columbia already had a rail line, owned by the Oregon Railroad and Navigation Company (later absorbed by Union Pacific Railroad).
The bridge was part of an overall planned new line from Vancouver to Northwest Portland, which included three major new bridges: the Columbia River Bridge, Oregon Slough Bridge and Willamette Drawbridge. Northern Pacific hired bridge builder Ralph Modjeski to design all three. On November 14, 1905, the SP&S board approved Modjeski's recommendations. Plans for the bridges were submitted to the War Department, and eventually approved in February 1906. Pier 2 of the Columbia River bridge, the pier on which the swing-span section pivots, was built as part of the canceled 1890 project, and was incorporated into the plans for the 1906 bridge.
The first work was performed on February 8, 1906, when work crews began framing the caissons. The steel was fabricated by the American Bridge Company of New York. Construction took approximately 26 months. Steel construction at the site began on June 15, 1907. Structural work on the bridge was completed in June 1908, but its opening to traffic was delayed by problems concerning installation of the heavy machinery required to turn the huge swing span on the new Willamette River bridge located on the same line.
The first train crossed the span on October 23, 1908, and the bridge opened for regular use in November 1908. This completed the initial SP&S route, between Portland and Pasco.
Ownership and operation of the bridge passed to the Burlington Northern Railroad (BN) in 1970, when SP&S, Northern Pacific and other railroads merged to form BN. At the end of 1996, BN merged with the Atchison, Topeka and Santa Fe Railway (Santa Fe), becoming the Burlington Northern and Santa Fe Railway (officially shortened to BNSF Railway in 2005).
Read more about this topic: Burlington Northern Railroad Bridge 9.6
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