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<br />Slide D6. Temporary "Bailey" bridge. <br /> <br />Sometimes temporary bridges can be installed, This temporary "Bailey" bridge was <br />quickly erected by the U.s. Army Corps of Engineers to replace a washed-out bridge <br />over the Carmel River after northern California floods of March 1995. This one-way <br />bridge permitted traffic flow across the river until a permanent bridge could be built. It <br />can take many months to design and construct new bridges and major highways. <br /> <br />Slide D7. Railroad cars used as temporary bridge <br /> <br />One interesting way to provide a temporary bridge is to use railroad cars. This clipping <br />tells of using 12 flatbed railroad cars welded together to form a temporary bridge in <br />California's Central Valley. Flooding in March 1995 washed out the bridge on Interstate <br />5 crossing Pasajaro Creek. With the temporary bridge in place, travel resumed less than <br />a week after the flood on Interstate 5-California's most heavily-traveled north-south <br />truck route. Permanent replacement took six months. <br /> <br />Slide DB. Boat used for access <br /> <br />Another temporary way to ease the impact of a lost bridge or highway is to use boats. <br />The only way to get to this house is by boat. Ferries can be used to carry people across <br />rivers where bridges have been washed away. <br /> <br />Slide D9. Now begin Task D. <br /> <br />Now, turn to the instructions for Task D. Your primary tool is the base map. You have <br />15 minutes to complete this task. <br /> <br />Reminder to Facilitator: Be sure to set the timer for 15 minutes. <br /> <br />Script-Task D, page 2 <br />