Form for third lift of construction shaft caisson, Waterworks Park, Detroit water supply system
Grab
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."