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Utah-Idaho Central 904, later Cornwall 12, is preserved at Branford:

http://www.bera.org/cgi-bin/pnaerc-query.pl?sel_allown=Utah-Idaho+Central&match_target=&Tech=Yes&pagelen=200

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I don't believe that a full restoration was done on this locomotive. I think it may have been operable until Hurricane Irene last year, but if memory serves it was in Branford's Barn 7 that got flooded during both Irene and Sandy so it would presumably need its motors rebuilt at this point.