Struggling to explain what I mean, every major city/river/harbour doesn’t have a natural coast line, but generally a stone wall that goes down into the river and creates a permanent solid edge. I’m sure with modern technology its easier, but the ones built hundreds of years ago baffle me. Tried googling it but got a combination of Minecraft, retaining wall and river rock information..
In: Technology
A Cofferdam is what you are looking for. Used in lots of situations like you mention. https://youtu.be/URC125wpMS4
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