Fourth of July, Centre Square, ca. 1812
Wooden Water Pipe, removed from Market Street, December 6, 1901
Centre Square Engine House, ca. 1807
Bethlehem Water Works, 2011
Roman Aqueduct in Segovia, Spain
Norman Lofton inspects sewer at Ditman and Sheffield, 1987
Sewer crawler Clarence Baskerville checks tunnel for leaks. He has faced the dangers of working in sewers for past three years, 1971
Norman Lofton inspects sewer at Ditman and Sheffield, 1987
Inspector looking for problems in sewer
Sewer crawler Tom Cross, heading down the manhole at 26th and Grays Ferry, 1982