Re: November 5th,6th & 7th 1954

It looks like from most of these notes that the same crews and locomotives worked each turn up the hill to build up a train, rather than sending several turns up under different crews and then sending one crew on to Alamosa.
Was this the practice because the 50's and 60's traffic volume didn't require higher performance, or was it always the practice to have each through train crew double their own train up the hill? It seems like with all the small engines of the early years, you'd have to run many small trains with many crews to get the large eastbound consists up the hill in a reasonably timely way.