fe.settings:getUserBoardSettings - non array given[qanonresearch] - Endchan Magrathea
 >>/46003/
Black Diamond Coal Mining Co.
200 miles of tunnel.  Hrmmm

When the miners departed the area around Mount Diablo in 1884, they left behind 200 miles of coal mine tunnels.

https://en.wikipedia.org/wiki/Black_Diamond_Coal_Mining_Company