View of the back channel for the Detroit water supply system. Crane in background. 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. 64. Date: 6-1-31. Photo by Manning Brothers." Typed on back: "Looking easterly up back channel from Station 1 + 50 W."
