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There are nods to nature, too, with osprey nesting poles at each end and a “sonic dish” art installation on the east bank that amplifies the sounds of the river. IT’S ALL IN A NAME. Tilikum is a word that comes from Chinook Wawa, an international language used by the first Oregonians, and later spoken by explorers, fur traders, settlers, and the first few gen- erations of Portlanders. Chinook Wawa is still spoken today. Tili- kum means people, tribe, and relatives and has come to mean friendly people and friends. The word itself symbolizes coming together. It conveys con- nections, in not only the relationships between people, but in the connections that will be made as they ride, walk, run, and cycle across this beautiful new bridge.

a forward-thinking urban transit system.

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 con- cepts, including optimizing the foundation system by reducing the number and size of drilled shafts and providing an alter- native structural basis for mitigation of liquefaction that re- moved the need to stabilize the soil on the west approach. This is the first new crossing of the Willamette River since the Freemont Bridge was constructed in 1973 and the new exten- sion of the light rail transit system is expected to serve more than 25,500 weekday riders by 2030.

VALUE ENGINEERING. To reduce proj- ect costs, TYLI engineers also in- troduced numerous value engi- neering concepts, including opti- mizing the foundation system by reducing the number and size of

IT’S A NATURAL BEAUTY. Even from afar the bridge stands out. LEDs light up the entire bridge, chang- ing color and pattern based on how fast, deep, and cold the river is flowing, making the crossing a people-pleaser from any angle.

drilled shafts and providing an alternative structural solution that removed the need to stabilize soil on the west approach. “We are tremendously pleased that T.Y. Lin International had the privilege of designing such an important, visually-iconic bridge for Portland, ‘The City of Bridges,’” Goodyear says.

EMBER 9, 2015, ISSUE 1127

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