Figure 1. a) Location of Voorburg-Arentsburg in the current Netherlands; b) Aerial view (Google maps) indicating the excavation trenches in the south-west of the town; c) schematic view of the excavated trenches with the course of Corbulos canal superimposed and the wooden piles marked.
Sometimes in the progressivist view of history that the liberals like to propagate, we forget that the Roman/Byzantine empires were as about as advanced a pre-industrial society that you could get. They were even masters of logistics that rivals our own time. It took to somewhere between the Revolutionary and Civil Wars before we finally surpassed them. There was nothing crude or primitive about them.