bh016424 Sinking caisson of construction shaft for tunnel, Waterworks Park, Detroit water supply system
bh016440 Forms and reinforcing steel for screen chamber, Waterworks Park, Detroit water supply system
bh016441 Forms and reinforcing steel for screen chamber, Waterworks Park, Detroit water supply system
bh016442 Forms and reinforcing steel for screen chamber, Waterworks Park, Detroit water supply system
bh016444 Construction workers at south heading of tunnel, Waterworks Park, Detroit water supply system
bh016445 Construction workers at south heading of tunnel, Waterworks Park, Detroit water supply system
