Animas Forks on the Silverton Northern RR. A new clue.

Very old issues of the small Train Magazine go for high prices and they are sure worth it if you can find them beyond the CD. Looking for something else I saw an interesting article in November 1942 issue with a story about “Oh Hell” Alberton, Engineer. He was a Boomer on many lines, and most interesting was his time on Silverton RR and Silverton Northern RR. His story told of Silverton RR to Red Mountain and SN Silverton to Eureka and to Forks of the Animas. “Each line used one engine. One was SN and the other an outside-frame job borrowed from D&RG. Oh Hell worked primarily on Red Mountain branch, sometimes making two or three trips a day up to the mines at the top end….Tracks once went three miles beyond Red Mountain to Ironton but had been removed by the time Alberton was maneuvering freight up and down the big hill. ..
‘Sometimes Oh Hell took freights from Silverton to Fork of Animas. He ran the construction train that was helping build (until Winter came) a mile branch to an ore mill above the Forks, with a rise of seven feet per every hundred, or close to it. “
There is July 1907 plan of proposal for this branch on page 239 of Robert E. Sloan and Carl A. Skowronski fine book “The Rainbow Route an illustrated history” 1975. These authors could not say if this branch was ever built. Dell McCoy looked for the grade but roads are all over the place and a metal detector has never been used to look for spikes in that area. This is the first indication that construction begun but it might not have been finished because of the damage one winter did to the first snow shed that was almost immediately destroyed. That is another story. Can anyone help with this puzzle?