Derrick boat "D-1" trimming berm and slope at bellmouth, Detroit water supply system
Grab
Description
View of derrick boat "D-1" trimming berm and slope at bellmouth 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. 67. Date: 6-15-31. Photo by Manning Brothers." Typed on back: "Derrick boat "D-1" trimming berm and slope at bellmouth of emergency inlet."