There is a small 60 year old dam on the river near your community. The dam has undergone many years of erosion and is in danger of breaking. If it breaks, parts of your community will be flooded. You are the head of a construction company that has been given the task of repairing the dam. An architect has come up with a plan to fix it, but unfortunately, the plans are locked up in the box. You must use your knowledge of erosion and deposition to unlock the box, get the plans, and start fixing the dam before it breaks!