West by Southwest to Stickney

Chapter 6 Photos, 21–45

(photos 1–20 here)

Central Area Water Reclamation Plants

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Photo 6.35

Looking northeast across the excavation for the bottom of final settling tanks at the Southwest plant on October 2, 1935. A piledriver is sinking piles into the soft clay subsoil. Thousands of piles were driven to support the reinforced concrete floors of the 32 aeration tanks and 24 final tanks in each battery. Each battery covered about 20 acres and 4 batteries were eventually built. (MWRD photo 20372)