Favorite this☆ bh016403 Workers placing concrete in last lift of north stop log shaft, Waterworks Park, Detroit water supply system
Favorite this☆ bh016360 Workers pouring concrete for roof slab, reservoir no. 2 during construction, Waterworks Park, Detroit water supply system
Favorite this☆ bh016349 Concrete operations, reservoir no. 2 during construction, Waterworks Park, Detroit water supply system
Favorite this☆ bh016317 Concrete operations, reservoir no. 2 during construction, Waterworks Park, Detroit water supply system
Favorite this☆ na043359 Workers laying concrete forms for Rolls-Royce main assembly plant for Packard Rolls-Royce Merlin XX engines
