Report to the Hon. Samuel H. Ashbridge, Mayor of the City of Philadelphia, On the Extension And Improvement of the Water Supply of the City of Philadelphia
Report to the Hon. Samuel H. Ashbridge, Mayor of the City of Philadelphia, On the Extension And Improvement of the Water Supply of the City of Philadelphia
Philadelphia. Commission On Extension And Improvement of the Water Supply
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At the present day, the people are no longer satisfied by a mere lessening of the turbidity of a city's water supply through sedimentation. Perfectly clear, and practically pure water is now demanded. Storage reservoirs are, therefore, no longer necessary for ordinary river or lake water, unless they are used for sedimentation to be fol- lowed by filtration. Storage reservoirs, for the purpose of compensating the yearly flow of the streams, would be reciuired for this city Digitized by Google 3...6 only iu the event of the supply being taken from the com- paratively small streams in the mountainous districts. If the Delaware and Schuylkill rivers are to be used, at points near the city of Philadelphia, the former at least, owing to its large size, constitutes its own storage reservoir, and, therefore, no special structures are needed here for the specific purpose of equalizing the seasonal flow. Sedimentation or settling reservoirs have been wanted in this city only because the waters of the Delaware and Schuylkill rivers are now used in their raw state, and, par- ticularly the latter, are very muddy after rain storms.
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