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DESCRIPTION:

Latitude 41°55'46",   Longitude 87°50'40"   NAD27

Cook County, Illinois, Hydrologic Unit 07120004

Drainage area: 451 square miles

Datum of gage: 612.93 feet above   NGVD29.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Peak streamflow	1960-04-02	1977-06-30	18
Field measurements	1976-03-05	1986-03-13	9
Field/Lab water-quality samples	1979-11-14	1982-09-21	16
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