Lead mine video (mentioned in the live stream)
Added 2022-04-08 00:02:55 +0000 UTCThe American lead mine video mentioned during the Patreon live stream:-
https://www.youtube.com/watch?v=6HhdkkdsvTM
Aside from the classic American overalls which haven't changed much over time, note the amount of really high power electrical equipment and the trains with the overhead wire at head height. I'll guess DC since it was used for high power traction at the time. But what voltage? For the torque involved in hauling ore I'd guess at least 500V.
