Form for third lift of construction shaft caisson, Waterworks Park, Detroit water supply system
Description:
View of form for third lift of construction shaft caisson, 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. 37. Date: 9-29-30. Photo by Manning Brothers." Typed on back: "15 ft. 6 in. diam. tunnel; form for third lift of construction shaft caisson. Timber bulkhead below forms closes opening for tunnel."