Derrick boat "D-1" depositing rock at back channel, Detroit water supply system
Grab
Description
View of derrick boat "D-1" depositing rock for shore protection at the back channel for the Detroit water supply system. Printed on front: "City of Detroit. Department of Water Supply. Intake system for additional supply. Intake lagoon. Contract RC-9. Dunbar & Sullivan Dredging Co., contractors. Photo no. 69. Date: 6-22-31. Photo by Manning Brothers." Typed on back: "Derrick boat "D-1" placing Livingstone Channel rock for shore protection along lower end of back channel, near Sta. 1 + 00."