Draining Chicago

Chapter 4 Photos, 1–23

(photos 24–46 here and 47–69 here)

North Area Sewersheds and Watersheds

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Lake Claremont Press: A Chicago Joint

S. Woodhouse Books

DC-Photo 4.9

After mining out the clay, forms were built in the bottom of the tunnel and the concrete invert of the intercepting sewer was poured. When the invert was cured, steel braces in the form of an arch were set, wooden planks attached, and concrete poured behind the wooden planks, as shown here on August 30, 1922, at the north heading, a block north of Dempster Street. (MWRD photo 9423)