Sewer worker Anthony Holston enters sewer, 1990
Manholes like this give access to city’s sewer system, 1961
Sewer Inspections: Vintage Images
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
Wood truss drawbridge, Orthodox Street over Frankford Creek, 1899 [Detail]
Wood truss drawbridge, Orthodox Street over Frankford Creek, rebuilt 1899
Bridge Street Draw, view through bridge, July 26, 1897