CEMEX (ex-SWPC) #415 is on the way from the quarry to the Victorville plant on May 13, 2012.
Last November, we were able to drive all the way into the quarry area and shoot the railroad. When we were there recently, we found a guard shack (seen on the far right) preventing access beyond the photo location. Seems that since we were there, two people riding "quads" managed to be on the track and, without much effort, got themselves killed.
As a result, CEMEX has closed access to the upper part of the railroad.