Sunday, September 3, 2017

Willamette River Crossings: Tilikum Crossing in Portland, Oregon

July 2017 (45.5049°N 122.6670°W) Tilikum Crossing
The city of Portland has a very good public transportation system. Therefore, it's not surprising that their first new bridge in 40 years across the Willamette River is the Tilikum Crossing, a multi-modal bridge that doesn't carry cars.
The architect of the bridge was Donald MacDonald and the engineer was TYLin International, the same team that designed California's East Bay Crossing. This 1720 ft long bridge (with a 780 ft long main span) is the longest 'no-car' bridge in the United States.
The Tilikum crossing is a cable-stayed bridge with two short 'H' towers that make the structure resemble an extrados bridge (a bridge where the cables act as additional prestressing tendons). The cables on the Tilikum Bridge are continuous through the towers, which is called a 'Freyssinet multi-tube saddle design.'
Tilikum is a Chinook word, which means 'The People' and so this bridge (owned by the Trimet Transit System) with its bike lanes and train tracks, is meant to provide transportation alternatives to all of the people and neighborhoods of Portland.
The Tilikum Crossing isn't as dramatic looking as MacDonald's and TYLin's East Bay Crossing. However, this is a community-friendly structure that goes a long way toward connecting all the people in the metropolitan Portland area. The cable arrangement at each tower is meant to resemble the shape of nearby Mt Hood, which can be seen if you look closely at the right side of the top photo.
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Bridge Ink said...

Nice Mark,
Two typos: Title, "Tillikup Crossing in Salem, Oregon" should read Portland.

You list the owner as Trinet - - should be Trimet.

Mark Yashinsky said...

Thanks Bob!