Curious, Ken.
Neither Mac Poor's Station List, nor Rick Steele's
1894 DL&G B&B Book list a depot at South Platte.
As the South Platte depot in the first decade photos looks similar to the Dumont depot on Clear Creek, I checked Poor's listing there as well--no depot listed.
I do have a copy of a C&S standard 22 x 50 foot depot that I acquired from John Maxwell 40 years ago. The hip roof is similar to South Platte and Dumont, but not identical and the door and window arrangement also differ:
Sorry, that is all I have.
Jim
Jim Courtney
Poulsbo, WA