Map of Philadelphia showing Population in year 1920
Map of the County of Philadelphia from Actual Survey, 1843
Philadelphia the Manufacturing and Industrial Capital map, 1906
1779 Revolutionary War-era map of Philadelphia and environs
Relative to Philadelphia's water and sewer systems, this includes pipes, pumps, plants, water works, reservoirs and other water storage facilities, and other aboveground and underground structures related to the city’s water supply, sewerage system, and drainage. In a larger sense, infrastructure includes many other human-made structures, including roads, highways, bridges, tunnels, canals, and other things of that nature.