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DESCRIPTION:

Latitude 41°34'06",   Longitude 87°36'28"   NAD27

Cook County, Illinois, Hydrologic Unit 07120003

Drainage area: 104 square miles

Datum of gage: 586.43 feet above   NGVD29.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1986-09-01	2017-09-21
Daily Data
Discharge, cubic feet per second	1948-05-17	2017-09-20	25329
Gage height, feet	1989-05-01	2017-09-20	8676
Daily Statistics
Discharge, cubic feet per second	1948-05-17	2017-06-26	25243
Gage height, feet	1989-05-01	2017-06-26	8589
Monthly Statistics
Discharge, cubic feet per second	1948-05	2017-06
Gage height, feet	1989-05	2017-06
Annual Statistics
Discharge, cubic feet per second	1948	2017
Gage height, feet	1989	2017
Peak streamflow	1947-04-05	2015-12-29	70
Field measurements	1954-10-11	2017-08-24	406
Field/Lab water-quality samples	1974-10-09	2016-12-22	264
Water-Year Summary	2006	2016	11

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