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Watersheds
Delaware River Watershed
Kensington Water Supply in 1883
The Water Supply Problem of Philadelphia, 1899
Diagram Showing Decreased Amount of Dissolved Oxygen in Delaware River, 1913
Water, Water Everywhere – Philadelphia Record, 1937-03-14
Pegg’s Run, Northern Liberties (Watson’s Annals)
Swimmers at Pier 126, Delaware River, July 15, 1918
Keystone Saw Works