For a series of photos of the Nighthawk Branch, see pages 49-53 in Tom Klinger, "C&S Platte Canon Memories & Then Some" (privately published, Tom Klinger, 2007). See the photo captions for the various source collections. There are no actual trains in any of the photos, but in one photo, there is one lone flat car on the single track below the "The Chutes." The flatcar has perhaps been "spotted" for loading cut granite blocks from the quarry along the tracks at this location.
Craig H. Trout