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DESCRIPTION:

Latitude 45°07'30",   Longitude 122°04'20"   NAD27

Clackamas County, Oregon, Hydrologic Unit 17090011

Drainage area: 479 square miles

Datum of gage: 1,091.69 feet above   NGVD29.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1986-10-01	2017-10-21
Daily Data
Discharge, cubic feet per second	1909-04-01	2017-10-20	36727
Daily Statistics
Discharge, cubic feet per second	1909-04-01	2016-10-17	36359
Monthly Statistics
Discharge, cubic feet per second	1909-04	2016-10
Annual Statistics
Discharge, cubic feet per second	1909	2017
Peak streamflow	1909-11-22	2015-12-07	99
Field measurements	1926-02-08	2017-09-19	204
Field/Lab water-quality samples	1998-05-06	1998-09-24	5
Water-Year Summary	2006	2016	11

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