Big South Fork Scenic Railway #105
1942, BB, C/N 70651, built by ALCo, 900 hp.  Ex-Port Huron & Detroit RR #60, ex-Genesee & Wyoming.  Shop for maintenance.  
 
 
 

 
Big South Fork Scenic Railway #106
1951, EMD SW-9, 12 CYL 567B engine and later rebuilt with 12 CYL 567BC, 1200 hp.
Ex-Seaboad Coast Lines #183, ex-Laurinburg & Southern RR #138,
acquired by Gulf and Ohio in 1997.    In Service.

ALCO S2 #105
 
 

 
Here's a picture of BSFSRY's #105, courtesy of "Classic Locomotives, the Series" taken in April of 1969 performing services for its first owner, the Port Huron and Detroit RR as #60.  It would later be sold to the Genesee & Wyoming RR then the Big South Fork Scenic Railway in the 1980's.  It is one of the oldest first generation diesel electric locomotives still in daily service in the United States and is the locomotive that is principally used to power the passenger trains at the BSFSRy.  It is also unique because it is a rare, small-turbo 900 hp unit.