Downstream from Koblenz, there are two small towns named Andernach and Neuwied. Historical scholarship suggests Caesar planned to cross the Rhine in between these two locations. The distance between the shorelines in this area is 800 to 1000 feet. The average depth of the river is 16 feet.
Before we talk about the construction of the bridge, it will be useful to show a photograph of the model that sits in The Museo Della Civilta Romana in Rome.