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Streamflow Measurements for the Nation

05587450 Mississippi River at Grafton, IL

Jersey County, Illinois
Hydrologic Unit Code 07110009
Latitude  38°58'04.7", Longitude  90°25'44.4" NAD83
Drainage area 171,300  square miles
Gage datum 403.32 feet above NAVD88
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Graph of streamflow measurement data at USGS 05587450 Mississippi River at Grafton, IL
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