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The Lacey V. Murrow Floating Bridge, USA

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Lake Washington, located in Seattle, is approximately 1.6 to 4.8 km wide and 32 km long. The water depth in most parts is 30 to 60 m. The bottom of the lake consists of another 60 m of very soft clay, silt, and organic material. These soft deposits are incapable of supporting foundations. Floating bridges have been found to be the most cost-effective structural type to span across Lake Washington. For crossing large body of water with unusual depth and soft bottom like Lake Washington, a floating bridge is estimated to cost 3 to 5 times less than a long span fixed bridge, tube or tunnel. This article briefly describes the design and construction of the new Lacey V. Murrow Floating Bridge on Lake Washington.
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Keywords: Bridge design; Concrete pontoons; Elastic foundations; Floating bridges; Lacey V. Murrow Floating Bridge (USA); Silica fume concrete

Document Type: Research Article

Publication date: 01 August 1993

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    Structural Engineering International (SEI), the quarterly Journal of IABSE, published since 1991, is the leading international journal of structural engineering dealing with all types of structures and materials. SEI offers its readers a unique blend of short profiles on recent structures, and longer, in-depth technical articles on research, development, design, construction and maintenance. Articles are written by practicing engineers and academia from around the world and reflect the high standards of IABSE. IABSE Peer Review stamps are given to papers that have passed through a highly selective review process and demonstrate a significant contribution to the state of structural engineering knowledge.To recognise contributions of the highest quality, an Outstanding Paper Award is presented each year.

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