View of 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. 16. Date: 4-9-30. Photo by Manning Brothers." Typed on back: "37 + 00 E. Approximately on axis of lagoon n. side of back channel at upper end."
