The drainage system prevented the City from being engulfed in flood water, the sewerage collection and treatment systems helped eliminate disease and famine and the water system treated Mississippi River water so that we could use this nearly limitless supply for drinking water, personal use and fire fighting.
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the sewerage collection and treatment systems helped,List([75, 127))
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prevented could use from being engulfed helped helped eliminate treated
the City from being engulfed in flood water
this nearly limitless supply for drinking water, personal use and fire fighting
L:in flood water
eliminate disease and famine and the water system treated Mississippi River water
disease and famine
Mississippi River water so that we could use this nearly limitless supply for drinking water, personal use and fire fighting