bh016403 Workers placing concrete in last lift of north stop log shaft, 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
bh016486 University of Michigan civil engineering students in tunnel, Waterworks Park, Detroit water supply system
bh016487 Men accompanying mayor of Detroit on inspection trip of river and land tunnels, Waterworks Park, Detroit water supply system
