Before I even read your message on this I thought of Monero. If you have a copy of Dorman's Durango, take a look on page 158. There is an early view of Monero from a slightly different angle which doesn't show the main but does show the spur. The building foreground building on the left side of your photo seems to match the building on the left in the Dorman collection photo. The pile of material from the mining operation is also there. The creek on the left side of the spur is also visible. According to the val map, that is El Magre Creek and there was a bridge just behind the photographer in your shot. On the same page in the Dorman book is another photo showing ties stacked in about the same location as your photo but this shot is from a different perspective.
Dave