bh017606 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017580 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017581 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017582 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017583 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017584 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017585 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017586 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017587 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017588 Crown fracture in tunnel during construction, Lake Huron Station, Detroit water supply system
bh017579 Hose connection and valve in tunnel during construction, Lake Huron Station, Detroit water supply system
