Automatic cone check valves, Springwells Station treatment plant during construction, Detroit water supply system
Description:
View of automatic cone check valves during construction of the Springwells Station treatment plant, Detroit water supply system. Printed on front: "City of Detroit. Department of Water Supply. Springwells Station. Check valves. Contract P.C. 49. Pit #6. Automatic cone check valves on pumps #16 & #18. No. 4. Date: 7-22-31. Photo by Manning Brothers."
