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/306849
Over 15 curved and tiered retaining walls support the approach pathways leading to the bridge. Photo: Pete Eckert. The available site was restricted by SR 14 and the BNSF Railroad. The Vancouver Land Bridge is a landscaped interpretive work of art that reconnects the Fort Vancouver National Historic Reserve to the Columbia River over the six-lane State Highway 14 (SR14) in Vancouver, Wash. One of six art pieces comprising the Confluence Project along the Columbia River Basin, the pedestrian bridge sews together severed lands that once were the end of the Klickitat Trail—a trading center and gathering place for more than 35 Native American cultures. With the project's severe physical constraints, archeological artifacts on site, and a unique design that reflects the tribal heritage of the area, the team faced an array of complex challenges for the winding, cast- in-place concrete structure. Siting that Respects Past, Present, and Future Concerns The land north of the project contains the historic Fort Vancouver and Kanaka Village. Archeological excavations on site were completed prior to the start of construction. The bridge and retaining wall foundations were designed to avoid possible artifacts that may lie deeper in the soil. The chosen site is constrained both horizontally and vertically by competing interests. An operational mainline railroad line just a few yards away runs parallel to the southwest approach. Officials of a nearby municipal airport had concerns over the long-term height impacts of the oak trees, lights, and trellises on the bridge. In addition, the bridge placement had to account for a variety of off-ramp alternatives being considered for the future I-5 Columbia River Crossing, a major interstate project of regional significance. (See Page 11.) The land bridge's 23-ft clearance above SR14 was needed to accommodate the future I-5 interchange ramp and helped to raise visitors away from the influence profile VANCOUVER LAND BRIDGE / VANCOUVER, WASHINGTON STRUCTURAL AND CIVIL ENGINEERS: KPFF Consulting Engineers, Portland, Ore. ARCHITECT AND LANDSCAPE ARCHITECT: Jones & Jones Architecture and Landscape Architecture, Seattle, Wash. ARTIST: Maya Lin Studio, New York City, N.Y. PRIME CONTRACTOR: Kiewit Pacific Co., Vancouver, Wash. AWARDS : Clark County Community Development, 2008 Community Pride Design; American Council of Engineering Companies, Oregon Chapter, 2009 Engineering Excellence Grand Award; Oregon Concrete and Aggregate Producers Association, 2009 Excellence in Concrete Award; Portland Daily Journal of Commerce, Top Project 2008 A new LegACy Vancouver Land Bridge by Tim Shell and Stephen Whittington, KPFF Consulting Engineers reConneCtS LAnd And river, PeoPLe And HiStory 26 | ASPIRE , Summer 2009 ASPIRE_Summer09.indb 26 6/5/09 1:51:34 PM