Favorite this☆ bh016799 Worker finishing steel form panel joints for tunnel lining, Waterworks Park, Detroit water supply system
Favorite this☆ bh016796 Workers lining tunnel with concrete, Waterworks Park, Detroit water supply system
Favorite this☆ bh016795 Workers stripping forms from first tunnel pour, Waterworks Park, Detroit water supply system
Favorite this☆ bh016792 Reinforcing steel and ribs for tunnel, Waterworks Park, Detroit water supply system
Favorite this☆ bh016498 Screen chamber during construction, Waterworks Park, Detroit water supply system
