John, I remember being told that the boilers were last steamed up in the early 1950s during a stock rush . I would note the end of regular use coincides with the REA's introduction of electricity in Chama in 1948 .The boilers also provided shop steam for steaming up locomotives and atone time powering the machine shop . Boilers like that were constantly under steam and to be tended by a hostler ,like a locomotive .