Monday, November 21, 2011

Railroad bridges fought nature, and usually lost

The Union Pacific railroad bridge, which spans the Colorado river from Indian Hill in California to Prison Hill in Arizona, was built to withstand the once mighty currents and seasonal flooding of the Colorado River.
Several other railroad bridges had previously been erected, beginning with the completion in 1877 of a massive wooden structure which was 667 feet long that utilized a 93 feet-long swing to allow steamboat traffic to pass back and forth.
That first bridge, and several that followed, did not survive the river's onslaught. Continued

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