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DESCRIPTION:

Latitude 37°56'43",   Longitude 122°02'55"   NAD27

Contra Costa County, California, Hydrologic Unit 18050001

Drainage area: 85.2 square miles

Datum of gage: 35.44 feet above   NGVD29.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Daily Data
Discharge, cubic feet per second	1968-10-01	1992-09-30	8766
Daily Statistics
Discharge, cubic feet per second	1968-10-01	1992-09-30	8766
Monthly Statistics
Discharge, cubic feet per second	1968-10	1992-09
Annual Statistics
Discharge, cubic feet per second	1969	1992
Peak streamflow	1969-01-26	1997-01-22	25
Field measurements	1968-10-15	1992-10-01	227
Field/Lab water-quality samples	1970-11-28	1988-08-09	10

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