Thanx to those who have answered, now to continue exposing how thick my head is...
When did 425 & 426 become not a mixed? They were shown as mixed in the reprint of 4th div tt #102 (7/20/19) that I got from CRRM a few eons back, so I assumed that they stayed that from then on out. And when did they become a mixed again?
Also, was there a bridge or some other row weakness resposible for the limitation of the K-36/37 mikes to Barranca & north? The same rail chart shows 70# rail down the 4% and nothing less than 57# from there on. All laid, presumably S.H., 1924-28. Certainly heavier than they ran on on the Alamosa Branch. Or the north end of the Chili Line, for that matter.
hank