Surface Water


Status  |  River’s End  |  Forecasts  |  Real-Time  |  Measurements

A network of stream gauges record and telemeter river stage information. Flow measurements by field crews help calibrate and confirm calculations. Data from stream gauge telemetry requires careful consideration as field conditions and equipment malfunctions can provide erroneous readings. A more accurate assessment of actual flow rates requires a review of the flow record and processing to account for actual conditions. This Quality Assurance Quality Control flow data is available on the Data Download page.

Flow Status  |  Top

Millerton Daily Operations Report  |  Top
This Report consists of the previous day’s Friant release flow rate and other data.

Stream Gage Telemetry  |  Top
Telemetered stream gauge stations with stage/flow information available at the California Data Exchange Center.

MIL - Millerton Lake SJN - San Mateo Rd CTK - Cottonwood Creek SJF - Below Friant H41 - Highway 41 LDC - Little Dry Creek DNB - Donny Bridge GRF - Gravelly Ford JBP - James Bypass SJB - Bifurcation CBP - Chowchilla Bypass DM3 - Delta Mendota Canal MEN - Mendota Pool SDP - Sack Dam EBM - Eastside Bypass below Mariposa SWA - Washington Ave SSH - Salt Slough ELN - El Nido Road BSD - Bear Creek MSG - Mud Slough SJS - Stevinson FFB - Fremont Ford Bridge SMN - Newman

map of gage stations

CDEC CodeFlowStage
MILSan Joaquin River ReleaseReservoir Elevation
CTKCottonwood CreekCottonwood Creek
SJFBelow FriantBelow Friant
LDCLittle Dry CreekLittle Dry Creek
H41Highway 41
DNBDonny Bridge (Rd 32)Donny Bridge (Rd 32)
GRFGravelly FordGravelly Ford
CBPChowchilla BypassChowchilla Bypass
SJBBelow BifurcationBelow Bifurcation
SJNSan Mateo Ave near MendotaSan Mateo Ave near Mendota
JBPJames BypassJames Bypass
DM3Delta Mendota Canal Check 21
MENNear MendotaNear Mendota
SDPNear Dos PalosNear Dos Palos
SWAWashington RoadWashington Road
ELNEastside Bypass near El NidoEastside Bypass near El Nido
EBMEastside Bypass below MariposaEastside Bypass below Mariposa
BSDBear Creek
SJSStevinsonStevinson
SSHSalt SloughSalt Slough
FFBFremont FordFremont Ford
MSGMud SloughMud Slough
SMNNear NewmanNear Newman

Measurements  |  Top

  • Flow and Stage Atlas
    • Flow Atlas Maps
    • Stage Atlas Maps
    • Graphs
  • Manual Measurements for Gauge Shift Corrections

SJRRP staff manually measure at gauge locations to verify and adjust rating curves. Posted results provide provisional estimates subject to revision during review and finalization. Below are USGS measurements and links to the USGS NWIS database containing all USGS measurements. Please see the Reclamation and DWR measurement spreadsheet on the data page.

Below Friant – See all measurements here

San Mateo Ave – See all measurements here

Below Mendota – See all measurements here

Posted results provide provisional estimates subject to revision during review and finalization.

Manual Measurements at Non-Gauged Locations
Other manual measurements of flow rates done periodically are available in the Annual Technical Report.