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DESCRIPTION:

Latitude 37°57'53",   Longitude 122°25'42"   NAD27

Contra Costa County, California, Hydrologic Unit 18050002

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1989-10-17	2006-07-31
Daily Data
Temperature, water, degrees Celsius -- (UPPER)	1989-10-18	2006-07-31	10126
Temperature, water, degrees Celsius -- (LOWER)	1989-10-18	2006-07-31	10420
Gage height, feet	1989-10-01	2001-01-01	7464
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- (UPPER)	1989-10-18	2006-07-31	9628
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- (LOWER)	1989-10-18	2006-07-31	10008
Field measurements	2005-10-01	2005-10-01	1
Field/Lab water-quality samples	1990-07-20	2006-04-25	251
Water-Year Summary	2005	2006	2
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