Aha, beehive ovens. I assume for making coke, altho around here they were used for brick. I seem to recall they had them along the South Park at one of the towns in the Platte Canyon. I can’t find the photo off hand to see if it was one of the locations where the valley was more wide open, as in this photo. Others on here can confirm if that’s a South Park or Rio Grande car.
Looking forward to hearing the answer, and thanks for posting this.
Cheers,
Ralph
“My heart is warm with the friends I make, And better friends I’ll not be knowing;
Yet there isn’t a train I wouldn’t take, No matter where it’s going.”
- - - - - - - “Travel”, by Edna St. Vincent Millay