The crazy thing about "Americana" is that another song on the album, "She'll Be Coming Round the Mountain" - which Neil calls "Jesus' Chariot" - may also be considered a coal mining song...
According to the album's liner notes, the "she" who's coming around the mountain may refer to Mother Jones coming to organize the Appalachian coal mines! Who would have thought that Uncle Neil and Crazy Horse would be singing two coal mining songs?!