who have worked in the mines for generations. ♪ ♪ - yeah, man, that coal mines is something else, you know, boy, you got to take care of yourself in there. - that fan is blowing about 200,000 cubic feet of air into the mine--fresh air. - when you go in that mine, you don't know whether you're gonna live to see the outside again. ♪ ♪ [indistinct radio chatter] [pensive music] - today we're going about 5,000 feet. - 5,000 feet deep? - yeah, oh, yeah. - pat graham is the foreman at the pay car mine in kimball. ♪ ♪