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From: Richard Smith <null@void.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: FWIW first welding job, 2 years on
Date: Tue, 15 Oct 2024 04:47:36 +0100
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What was "unique" about mining the Comstock Lode is shown here
https://en.wikipedia.org/wiki/Comstock_Lode
in pic
https://en.wikipedia.org/wiki/Comstock_Lode#/media/File:Mining_on_the_Comstock.jpg
That "cuboid" bracing.
There is some of that to be seen in a preserved mine.
But yes, preserving a mine isn't easy, in general.