View of cranes on an earth dike 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. 14. Date: 4-8-30. Photo by Manning Brothers." Typed on back: "Earth along southerly side of back channel for retaining dredged material as discharged from hydraulic dredge. Plant on intake cofferdam to rear."
