bh016909 Forms in place on dock wall ready for concrete, Waterworks Park, Detroit water supply system
bh016913 Workers pouring concrete in forms for dock wall, Waterworks Park, Detroit water supply system
bh016942 Disc for gate valve in sluice gate, suction chamber, Waterworks Park, Detroit water supply system
bh016815 Workers standing next to water main at Dequindre and Grixdale Streets, Detroit water supply system
bh016816 Workers standing next to water main at Dequindre and Grixdale Streets, Detroit water supply system
