View of a low-lying fill area for the Detroit water supply system. Cranes 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. 46. Date: 9-22-30. Photo by Manning Brothers." Typed on back: "View of low area in the north westerly corner of the large fill area south of the back channel, looking eastward."