ABSTRACT
A modern oating bridge may be constructed of wood, concrete, steel or a combination of materials, depending on the design requirements. A 124 m (407 .) long oating movable wood pontoon railroad bridge was built in 1874 across the Mississippi River in Wisconsin. It was rebuilt several times before it was abandoned. A 98 m (322 .) long wood oating bridge is still in service in Brookeld, Vermont. e present Brookeld Floating Bridge is the seventh replacement structure, and was built by the Vermont Agency of Transportation in 1978. e rst 2018 m (6621 .) long Lake Washington Floating Bridge in Seattle (Andrew 1939; Lwin 1993) Washington State, was built of concrete and opened to trac in 1940 (Figure 14.1). Since then, three more concrete oating bridges were built (Lwin 1993; Nichols 1962). ese concrete oating bridges form major transportation links in the State and Interstate highway systems in Washington State. e Kelowna Floating Bridge on Lake Okanagan in British Columbia, Canada (Pegusch 1957), was built of concrete and opened to trac in 1958. It was 640 m (2100 .) long and carries 3 lanes of trac. is 3-lane bridge was replaced with a ve-lane oating bridge to mitigate congestion and improve safety and eciency of trac movement across Lake Okanagan, and support economic growth in the region. e new bridge was opened to trac on May 25, 2008, and was renamed the William R. Bennett Bridge in honor of the former Premier William Richards Bennett, who was a
14.1 Introduction ......................................................................................549 14.2 Basic Concepts...................................................................................551 14.3 Types ...................................................................................................552
