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Streamflow Measurements for the Nation

USGS 05587500 Mississippi River at Alton, IL

Madison County, Illinois
Hydrologic Unit Code 07110009
Latitude  38°53'06", Longitude  90°10'51" NAD27
Drainage area 171,500  square miles
Gage datum 403 feet above NAVD88

Period of record
Begin Date End Date Count
1985-10-07 2008-06-26 4

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