Good sharp eyes Mike, this had to be one of the most interesting sidings one could ever wish for. It didn't seem to last very long. I would like to have found another picture showing a car atop this structure, The wooden railed tramway below exiting the building possibly supplied coal to the boilerhouse of the adjacent Mill (later the Fifty).
Now I haven't rechecked the Up Clear Creek articles in the Gazette, but I don't recall Harry Brunk id'ing this oddity.
http://digital.denverlibrary.org/cdm/fullbrowser/collection/p15330coll22/id/78528/rv/singleitem
UpSideDownC
in New Zealand