Belmont Filters construction, 1903
Finished Upper Roxborough filters, 1903
Upper Roxborough filter beds under construction, July 1902
City officials tour new interceptor sewer, 1953
Sewer construction, Rock Run, 1922
Any images made from a photographic print or negative, including stereoviews, glass or film negatives, tintypes, daguerreotypes, and other photographic processes.