November 19, 2011, I could not photo all of the engines. I think there were six!
(I have my camera set up to take three photos at a time.)
December 10, 2011, a train was parked about a half mile north of the arch bridge. I took some photos through the brush.
An hour later, I photographed the train near the pond, just a few hundred feet from where the earlier pictures were taken. It appears that there are four engines on this train. There was a Pan Am, followed by two Gilford Industries, and then another Pan Am.