No one that I know has researched the various very short lived sidings that were put in and used during the mud season to load and move logs to McPhee between 1933 and 1945 period. The regular sidings were used and additionally, extra ones were thrown in near the timber and pulled as soon as the cut was done. In some cases the timber owner wanted the RGS to supply them a log train such as the Dolores Lumber & Supply used at Hogg, but they refused. When the roads were good, the logs moved on trucks.
There are no photographs or proof that rail logs fed McPhee east of Dolores like we see from Otto Perry views of the unit log trains from MP 60 Timber Spur, (see RGS Story VII). I guess you see the proposed Smelter planned for Brayton (mp 129.2) on page 377 of Volume VIII.