Bridge Street Draw, southeast corner property, June 12, 1896
Bridge Street Draw. Southwest side of bridge. April 19, 1896. [Detail of people].
Bridge Street Draw. Southwest side of bridge. April 19, 1896. [Detail].
Bridge Street Draw, April 19, 1896. [Detail of men]
“Philadelphia Underground,” Jan. 29, 1961
“Sewer Crawlers,” January 29, 1961
PWD water tech at the Philly Home Show, 1960 (detail)
Nine visiting nurses ready for work, ca. 1909
Pipe Test, 1914
Sewer construction, Rock Run, 1922
