Colorado & Southern Motive Power.

And, I believe 15 active engines of their own.
#537 was leased in 1927 to raise the number of available engines back to 15 after #61 was retired. #58 was brought back from the dead line for a curtain call also, but I included it in this count.
Anyway, in 1927, active engines were the 6,8,9,58,60,68,69,70,71,72,73,74,75,76, and 537.
That's 15. 60 was the designated switch engine at Leadville until 1936. 70 was not used West of Waterton after converted to oil in 1927.
4 days a week, 8 of these engines were required to move freight between Leadville and Denver, and 2 were used on the daily Passenger with a reserve held at Como. That's 11 out of 15 needed 4 days a week. It was quite a challenge to keep some of these ond teakettles running.
The three C-19's, 343,345 and 346 were leased in 1936 to replace the 73 and 75 which were wrecked at Boreas in January of that year. Both were returned to service, although the 73 remained in the position she slid to in the wreck until the following summer.
Mike