I was browsing through the Dorman Collection on Line last evening and stumbled upon these John Maxwell Kodachrome slides, taken in the summer of 1941.
http://ngtrainpics.photoshelter.com/gallery/RDS017-C-S-Como-Ops-RGS-Tour/G0000w74vV9hPTBo/C0000Vd2qoA2MbNUC&S 70 takes water at Forks Tank after turning to back to Blackhawk. This image has been posted above--this one seems a little sharper.
C&S 70 and 69, both backing, move a train including dead C&S 71, the display coal car and combine 20 up grade to Blackhawk, passing the site of Smith Hill tank.
C&S 70 leaves lower Blackhawk at dusk, eastbound.
C&S 70, backing westbound by the Argo Tunnel, with a train of flat cars.
C&S 75 at Leadville, May 1st, 1941.
Another view of C&S 75 at Leadville, with part of CONX tank car in background. A bit of a guide to weathering.
Finally, C&S 75 and train depart Leadville, eastbound for Climax.
Jim Courtney
Poulsbo, WA