Ground Plan, Great Central Sanitary Fair, Philadelphia
Images from ‘The Water Supply of the City of Philadelphia by a proposed Aqueduct from Norristown Dam’
Main Pumping Stations for Philadelphia Drinking Water
Drawing Dock Creek (2008)
Battle of Germantown map, 1777
“A Snake That Will Be Straightened Out,” map of Frankford Creek with proposed changes, 1949
Plan of the City of Philadelphia and Adjoining Districts, 1830
Map of Philadelphia showing Population in year 1920
Map of the County of Philadelphia from Actual Survey, 1843