Sunday, July 24, 2011

Sunday Bridges, the St. Johns Bridge over the Willamette River

This is a portion of the St. Johns Bridge, seen from the Burlington Northern Railroad Bridge, a truss bridge with a vertical left, as the SP 4449 steamed across the Willamette River on July 3, on its way to Wishram, Washington. I took the photo from my seat in the dome car, looking to the north. On the left you see just a bit of the upper structure of the railroad bridge and some of the rivets.

The St. Johns Bridge is a steel suspension bridge over the Willamette River, connecting the St. Johns neighborhood and the Northwest Industrial area around Linnton, another Portland neighborhood; Linnton extends into unincorporated Multnomah County, outside the city limits of Portland. It is the only suspension bridge in the Willamette Valley and one of three public highway suspension bridges in Oregon. There are two gothic towers, not just one as you see in the photo, both of which are 408 feet tall. It has a 1,207 foot center span and a total length of 2,067 feet. The St. Johns Bridge is the tallest one in Portland, with a navigational clearance of 205 feet.

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