Drainage area plan, early 19th century
Southwest Sewage Treatment Plant under construction, 1949
Two Frankford Creek Bridges, 1896-1899
Plan and profile of proposed Delaware Seventh St. Sewer, 1850
Plan of Pine Street Sewer, 1830
Wooden Water Pipe, removed from Market Street, December 6, 1901
Wood truss drawbridge, Orthodox Street over Frankford Creek, rebuilt 1899
Bridge Street Draw, view through bridge, July 26, 1897
Bridge Street Draw, draw partly open, July 26, 1897
Bridge Street Draw with draw open, July 26, 1897