this is whats called a ‘coffer dam’, you basically build some walls, drop them in the water, tie them together, and then pump out the water from your new hole in the water so you can build while staying dry
its oddly not that hard- the flippin ROMANS were able to do it with logs and mud
occasionally particularly devious people would use this to hide treasure or tombs underneath the river so its not only impossible to find but impossible to get to without an engineer division
I would be terrified every single moment working in that thing.
To be fair, @aggrokawaii you’d probably be terrified of every construction environment, when push to the extremes. Working on steel beam skeletons of sky scrapers, around the high voltage of live line repairs, in the nuclear environment of a nuclear generator, he’ll even around the falling giants of lumberjacks have become accustomed too.
This shit happens everyday, in order to sustain the way of life you’ve grown accustom too.
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