ok, im doing a project called EWB (Engineers without Borders) and our group of 5 consists of the following: 2 Mech Eng students 1 Flexi first year engg student 1 biomed engineering student and 1 aeronautical engineering student (if u want to see the EWB website its here: www.ewb.org.au/ewbchallenge/[/URL]) we have to design projects that will benefit the people of cambodia, and our team decided a low cost bridge would be a good thing to do. and we are hitting major problems. we decided to use a pontoon bridge so the cambodians can simply build as many sections as they want and span the rivers, and we plan to anchor each end to the shore by concreting some poles. Now, the lecturer has asked us what we plan to do when the floods come in. we came up with a few ideas... 1. pull the bridge in and wait until the worse of the flood is gone then respan the river 2. place large wooden poles in the river on either side of the bridge at various intervals to stop it floating away 3. same as #2, but this time the poles are in the centre of the bridge 4. Fix the pontoons well enough so that they wont go anywhere any other ideas or ways we can implement any of the four above mentioned ideas?