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Tilikum Crossing, Bridge of the People

Portland, Oregon

Market Sector

Bridge, Rail and Transit

Type

Cable-Stayed, Pedestrian, Segmental, Passenger and Transit, Transit

Services Provided

Design, Seismic Analysis and Design

Region

Americas

In The News

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Photo Credit: Tom Paiva Photography
Photo Credit: Blueprint22 Photography
Photo Credit: Tom Paiva Photography
Photo Credit: Tom Paiva Photography
Photo Credit: Blueprint22 Photography

T.Y. Lin International (TYLI) served as Engineer of Record for the new Tilikum Crossing, Bridge of the People, a transit-only, cable-stayed bridge spanning the Willamette River in Portland, Oregon – the nation’s “City of Bridges.” The sleek, modern multi-modal bridge is the largest transit bridge in the United States for light rail, streetcars, buses, bicycles, pedestrians, and emergency vehicles – but no private or commercial vehicles.

At 1,720 feet long, with a main span of 780 feet, the concrete bridge is a hybrid between a traditional cable-stayed layout and an extradosed bridge, with two towers and two landside piers. Two 14-foot-wide bicycle-pedestrian paths flank each side of the bridge, with pedestrian belvederes at the towers.

The design-build project is the jewel of the Portland-Milwaukie Light Rail Project, a 7.3-mile transit link from downtown Portland to Park Avenue in Clackamas County. TYLI’s scope of work consisted of the design engineering of the elevated structure, along with roadway improvements at the east side touchdown, two 160-foot-tall pylons, drilled shaft foundations, direct-fixation track, and systems integration.

Project Highlights:

  • The project had an aggressive design-build schedule that called for work to begin in the river only five months after notice-to-proceed.
  • Because the bridge is located in an area of relatively high seismicity, TYLI engineers were charged with ensuring that the bridge design successfully met special transit and seismic design requirements.
  • The TYLI team implemented important value engineering concepts, including optimizing the foundation system by reducing the number and size of drilled shafts and providing an alternative structural basis for mitigation of liquefaction that removed the need to stabilize the soil on the west approach.
Awards
National Honor Award, 2016
American Council of Engineering Companies (ACEC)
Best Highway/Bridge Project Award, 2016
Engineering-News Record (ENR), Northwest
Project of the Year, 2016
American Council of Engineering Companies of Oregon (ACEC-OR)
People's Choice Award, 2016
American Council of Engineering Companies of Oregon (ACEC-OR)
Bridge Award of Excellence, 2015
American Segmental Bridge Institute (ASBI)
Excellence in Concrete Award, 2015
Oregon Concrete & Aggregate Producers Association (OCAPA)