THE CONCRETE BRIDGE MAGAZINE

WINTER 2009

ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

Issue link: http://www.aspiremagazinebyengineers.com/i/306858

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The bridge is the first on the interstate to use the state's new Context- Sensitive Solution guidelines, which resulted in flared columns and other embellishments. All photos: Washington State Department of Transportation. 26 | ASPIRE , Winter 2009 A d m i n i s t r a t o r s a t S o u n d Tr a n s i t (Central Puget Sound Regional Transit Authority) wanted to connect their new interstate bus transit station to an existing park-and-ride lot across the interstate highway. Their goal was to improve bus transit speed and reliability by eliminating the circuitous route previously required to access the lot. The connection required a 607-ft-long bridge over the interstate, along with an elevator and stairs down to the surface parking. The bridge had to be built while keeping traffic flowing as smoothly as possible during the construction. In addition, the park-and-ride lot had to remain open with minimal disruption or reduced capacity. To accomplish these goals, designers used precast concrete trapezoidal tub girders that also allowed for the incorporation of context-sensitive features that will serve as an inspiration for other bridges on the interstate corridor. profile CANYON PARK FREEWAY STATION / BOTHELL, WASH. ENGINEER: Washington State Department of Transportation, Olympia, Wash. PRELIMINARy ARCHITECT: Streeter Associates, Seattle, Wash. CONTEXT-SENSITIVE SOLUTION ARCHITECT: HNTB, Bellevue, Wash. AWARDS: Best Non-Highway Bridge co-winner, Precast/Prestressed Concrete Institute's 2008 Design Awards by Brian Aldrich, Washington State Department of Transportation And COlOrful Precast concrete helps first bridge on interstate corridor meet state's context-sensitive design and speed construction

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