South heading of tunnel during construction, Waterworks Park, Detroit water supply system
Description:
View of south heading of tunnel during construction, Waterworks Park, Detroit water supply system. Printed on front: "City of Detroit. Department of Water Supply. Land tunnel and structures. Contract RC 12. Dravo Contracting Co., contractors. Photo no. 87. Date: 3-20-31. Photo by Manning Brothers." Typed on back: "15 ft, 6 in. tunnel, south heading. Placing reinforcing steel in the 10 feet of tunnel adjacent to shore shaft. Excavation supported by 6 segmental timber bent and liner plates."