Favorite this☆ bh016497 Core samples taken from land tunnel, Waterworks Park, Detroit water supply system
Favorite this☆ bh016496 Core samples taken from land tunnel, Waterworks Park, Detroit water supply system
Favorite this☆ bh016495 Core samples taken from land tunnel, Waterworks Park, Detroit water supply system
Favorite this☆ bh016494 Core samples taken from land tunnel, Waterworks Park, Detroit water supply system
Favorite this☆ bh016493 Core samples taken from land tunnel, Waterworks Park, Detroit water supply system
Favorite this☆ bh016492 Core samples taken from land tunnel, Waterworks Park, Detroit water supply system
Favorite this☆ bh016489 Goldbeck cells taking pressure readings, Waterworks Park, Detroit water supply system
Favorite this☆ bh016488 Workers posing in tunnel during construction, Waterworks Park, Detroit water supply system
Favorite this☆ bh016487 Men accompanying mayor of Detroit on inspection trip of river and land tunnels, Waterworks Park, Detroit water supply system
Favorite this☆ bh016486 University of Michigan civil engineering students in tunnel, Waterworks Park, Detroit water supply system
Favorite this☆ bh016481 Screen chamber during construction, Waterworks Park, Detroit water supply system
Favorite this☆ bh016480 North stop log shaft excavation, Waterworks Park, Detroit water supply system
