David:
I responded to you in a separate email.
The drawings are from 1896 and show 85 rail dual gauge stub switches.
I am thinking of writing an article on D&RGW daul gauge operations. The first daul gauge ilder cars on the Alamsoa - Antonito line were early in the 1900s and much of this has not been documented. I have become very interested in the dual gauge operations between Salida and Leadville as this lasted until 1925 and was on the D&RGW main line. It was possible to see 1500 class 4-8-2s and 2-8-8-2s running on dual gauge track. The D&RGW equipped a few standard gauge cabooses with dual gauge couplers. C&S narrow gauge cars also used this line to the Saint Elmo branch and for carrying coal from the Crested Butte branch to a smelter at Kokomo. The building of the barrel tansfer in 1924 enabled the D&RGW to remove the dual gauge. In their request to the Colorado PUC to remove it, they cited the maintenace required and the need to relay the line with heavier rail.