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Photo of officials inside one of the gigantic penstock pipes used in the Hoover Dam, 1935. (lemmy.world)

submitted 6 days ago by time2lose@lemmy.world to c/interestingasfuck@lemmy.world

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[–] Equinox1289@sh.itjust.works 7 points 6 days ago

So I think it's crazy that instead of the large tunneling bores that we use now, they essentially just had a bunch of people with large hand drills on multiple levels, all drilling out the holes all at the same time and then blowing it up in stages as they kept going.