McKenna Process Company
Plant formerly located in Joliet, Illinois - ca. 1920.
Image 21 - Loading yard viewed from the West
Loading yard viewed from the West - Overall
 Image 21. Loading yard viewed from the west. The
rerolled rails standing upright in the foreground are
awaiting inspection. Those piled beyond have been
accepted and sorted and are ready for loading.
Details scanned from the original print:
  a. Loading Yard from West - Overall
  b. Inspectors - Panorama
  c. Drilling Holes in Rail Ends - Far Left
  d. Inspected Rails

Use the second image of the hole-drilling operation as 
seen below, left, to orient yourself on the mill property.
 
Drilling Holes in Rail Ends - Far Left

Loading yard from West - Drilling Holes
 
Inspectors - Panorama
Loading yard from West - Inspectors - Panoramic View
 
Inspected Rails
Loading yard from West - Inspected Rails