West by Southwest to Stickney

Chapter 4 Photos, 38–73

(photos 1–37 here)

Extending the Sanitary & Ship Canal

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Photo 4.42

By May 6, 1907, the Butterfly Dam center column is in place and the lower leaf truss has been assembled, shown looking down toward the southeast. The derrick in the foreground assists in leaf construction. The north pier, out of the view to the left, included a vertical shaft connected to a horizontal subsurface access tunnel from the west wall. (MWRD photo 3529N)