McKenna Process Company
Plant formerly located in Joliet, Illinois - ca. 1920.
Image 4 - Rail Unloading & Storage Yard
Rail unloading and storage yard - McKenna Process Company
Image 4. Rail unloading and storage yard viewed from 
the east.
Rolling mill in background (right).

Details scanned from the original print:

a. Overall
b. Detail of Men Working
c. CloseUp of Men Working
d. Men Handling Rails Near Rolling Mill

Note the stacks of the steam boilers at right rear.
They can also be seen in Images 6 & 7.
Detail of Men Working - Magnetic crane at left - Rolling mill in right center
Rail unloading and storage yard - detail of men working

CloseUp of Men 
Working
Rail unloading and storage yard - men working near rolling mill
Men Handling Rails Near Rolling Mill
Rail unloading and storage yard - detail of men working