Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our mobile dedicated web site here.
Click to hideNews Bulletins
  • Notice - The USGS Water Resources Mission Area's priority is to maintain the safety and well-being of our communities, including providing critical situational awareness in times of flooding in all 50 U.S. states and additional territories. Our hydrologic monitoring stations continue to send data in near real-time to NWISWeb, and we are continuing critical water monitoring activities to protect life and property on a case-by-case basis. The health and safety of the public and our employees are our highest priorities, and we continue to follow guidance from the White House, the CDC, and state and local authorities.

  • Introducing The Next Generation of USGS Water Data for the Nation
  • Full News RSS icon


  Stream Site

Latitude 37°56'34",   Longitude 121°31'59"   NAD27
San Joaquin County, California, Hydrologic Unit 18040003
Datum of gage: 0 feet above   NAVD88.
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    1987-01-09  2020-04-08  
 Daily Data
    Discharge, tidally filtered, cubic feet per second  1987-01-09  2020-04-05  10088 
 Daily Statistics 
    Discharge, tidally filtered, cubic feet per second  1987-01-09  2020-01-13 10005 
 Monthly Statistics 
    Discharge, tidally filtered, cubic feet per second  1987-01  2020-01  
 Annual Statistics 
    Discharge, tidally filtered, cubic feet per second  1987  2020  
 Field measurements 1996-10-15  2020-01-14  1373 
 Field/Lab water-quality samples 1993-02-19  2020-03-12  244 
 Water-Year Summary 2014  2019  6 
 Revisions  Loading...
Record for this site is maintained by the USGS California Water Science Center
Email questions about this site to California Water Science Center Water-Data Inquiries