Southwest Sewage Treatment Plant under construction, 1949
Emscher Tank Installation at Essen Nord, Germany
Thomas Run sewer outlet at Cobbs Creek
Thomas Run sewer outlet during construction
Cohocksink Sewer System outlet at Laurel Street
Any images made from a photographic print or negative, including stereoviews, glass or film negatives, tintypes, daguerreotypes, and other photographic processes.