Core samples taken from land tunnel, Waterworks Park, Detroit water supply system
Description:
View of core samples taken from land tunnel, Waterworks Park, Detroit water supply system. Sign in foreground reads: "City of Detroit. Department of Water Supply. Additional supply. Contract RC-12. Cores from concrete lining of 15 ft.-6 in. tunnel. Printed on front: "City of Detroit. Department of Water Supply. Land tunnel and structures. Contract RC 12. Dravo Contracting Co., contractors. Photo no. 124. Date: 5-25-31. Photo by Manning Brothers." Typed on back: "Cores taken from lining of 15'-6" land tunnel in Water Works Park, connecting screen chamber and shore shaft. For other view see photo no. 138."
