By far the best known C&S locomotives ever leased to the Q were the pair of C-3H1 Ten-Wheelers, 330 and 331, that powered Edgemont-Deadwood passenger trains 141-142 for many years. The 331 came to south Dakota in 1929, accompanied by slightly lighter sister 323. But that slight difference made the smaller engine less suitable to the run that included 3 percent grades and 7 degree curves, so the 323 was returned in 1933 and the 330 substituted. They would remain until the passenger trains came off in 1949. Above the 331 rests beside the Deadwood roundhouse on Aug. 2, 1966, while below it stops for water at the Pringle tank while taking No. 141 up the Deadwood branch on July 19, 1949, just months before the end. Once the passenger service ended, someone thought the pair of heavy Ten-Wheelers could be put to use on the St. Joseph Division, and they made it as far east as Lincoln before the realization set in that both were oil-burners that could not be fueled anywhere on the St. Joe Division. So they were sent home to Denver and sold for scrap on Sept. 7, 1950, the last C&S steam power on lease to the Q.
