4-12-4 was the biggest steem engine? When I fist moved to Mescal from Tucson about ten years ago, there was still an old hulk of a coal elevator about two miles away that I could see out my front window. The kids TAGGED it pretty bad and one day SP showed up with dynomite and leveled it. About 5 miles further toward Tucson there is still an old water tank next to the tracks in a now non existent town called Pantano.