Men unloading alum from freight car, Springwells Station treatment plant, Detroit water supply system
View of two men unloading alum, via a hose, from a railroad freight car during the construction of the Chemical Building in the Springwells Station treatment plant, Detroit water supply system. Printed on front: "City of Detroit. Department of Water Supply. Springwells Station. Chemical Building. Contract No. FC-20. Building construction: W.E. Wood Company. File no. 831. No. 30. Date: 8-6-31. Photo by Manning Brothers." Typed on back: "Unloading first car of alum; air hose suspended from cable."