Favorite this☆ bh016909 Forms in place on dock wall ready for concrete, Waterworks Park, Detroit water supply system
Favorite this☆ bh016911 Form work and concreting plant, dock wall, Waterworks Park, Detroit water supply system
Favorite this☆ bh016913 Workers pouring concrete in forms for dock wall, Waterworks Park, Detroit water supply system
Favorite this☆ bh016942 Disc for gate valve in sluice gate, suction chamber, Waterworks Park, Detroit water supply system
