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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 11467500 SF GUALALA R NR ANNAPOLIS CA
Sonoma County, California
Hydrologic Unit Code 18010109
Latitude  38°42'18", Longitude 123°25'19" NAD27
Drainage area 161  square miles
Gage datum 70 feet above NGVD29
Output formats
HTML table with channel data
HTML table without channel data
Tab-separated data with channel data
Tab-separated data without channel data
Graph of data
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Meas.
Number		   Date       Time Time
Datum		 Measurement
Used?		   Who Measuring
Agency		 Stream
flow
(ft3/s)		 Gage
Height
(ft)		 GH
Change
(ft)		 Meas.
Duration
(hr)		 Meas.
Rated		   Control Flow
Adjust.
Code 		 Channel
Number		 Channel
Name		 Meas.
type 		 Stream
flow
method 		 Velocity
method 		 Channel
flow
(ft3/s)		 Channel
width
(ft)		 Channel
area
(ft2)		 Channel
vel.
(ft/s)		 Channel
stability 		 Channel
material 		 Channel
evenness 		 Long.
vel.
desc. 		 Horz.
vel.
desc. 		 Vert.
vel.
desc. 		 Channel
loc.
code 		 Channel
loc.
dist.(ft)
2851994-07-05 12:20PDTYesSAHUSGS4.646.130.000.50FairClearNONE1Imported Channel 1WADEunspeunkno4.6433.012.50.37UNSPUNSPUNSPunknUNSPUNSPUNSP
2841994-05-16 11:45PDTYesSAHUSGS33.96.330.000.60GoodVegetationLightNONE1Imported Channel 1WADEunspeunkno33.954.534.70.98UNSPUNSPUNSPunknUNSPUNSPUNSP
2831994-04-05 11:30PDTYesSAHUSGS48.16.400.000.40Good NONE1Imported Channel 1WADEunspeunkno48.143.535.21.37UNSPUNSPUNSPunknUNSPUNSPUNSP
2821994-02-03 12:25PSTYesSAHUSGS1526.770.00 GoodClearNONE1Imported Channel 1WADEunspeunkno1521371441.06UNSPUNSPUNSPunknUNSPUNSPUNSP
2811993-12-16 12:15PSTYesSAHUSGS3437.220.000.80GoodClearNONE1Imported Channel 1WADEunspeunkno3431471771.94UNSPUNSPUNSPunknUNSPUNSPUNSP
2801993-11-04 13:10PSTYesSAHUSGS4.705.730.000.50GoodDebrisHeavyNONE1Imported Channel 1WADEunspeunkno4.7014.04.071.16UNSPUNSPUNSPunknUNSPUNSPUNSP
2791993-08-06 11:45PDTYesSAHUSGS13.95.930.000.50GoodClearNONE1Imported Channel 1WADEunspeunkno13.927.217.50.79UNSPUNSPUNSPunknUNSPUNSPUNSP
2781993-06-11 13:05PDTYesSAHUSGS1676.750.000.90GoodClearNONE1Imported Channel 1WADEunspeunkno16770.01131.48UNSPUNSPUNSPunknUNSPUNSPUNSP
2771993-05-07 11:15PDTYesSAHUSGS1276.680.000.70GoodClearNONE1Imported Channel 1WADEunspeunkno12781.81061.20UNSPUNSPUNSPunknUNSPUNSPUNSP
2761993-03-11 14:25PSTYesSAHUSGS2026.660.000.60GoodClearNONE1Imported Channel 1WADEunspeunkno20274.11151.76UNSPUNSPUNSPunknUNSPUNSPUNSP
2751993-02-10 14:45PSTYesSAHUSGS3086.700.001.00GoodClearNONE1Imported Channel 1WADEunspeunkno3081442651.16UNSPUNSPUNSPunknUNSPUNSPUNSP
2741993-01-08 12:50PSTYesSAHUSGS12708.41-0.051.80FairClearNONE1Imported Channel 1CRANunspeunkno12702094522.81UNSPUNSPUNSPunknUNSPUNSPUNSP
2731992-12-03 14:10PSTYesSAH/JCMUSGS2856.77-0.040.80GoodClearNONE1Imported Channel 1WADEunspeunkno2851481731.66UNSPUNSPUNSPunknUNSPUNSPUNSP
2721992-11-04 12:10PSTYesKSWUSGS23.85.680.000.50FairClearNONE1Imported Channel 1WADEunspeunkno23.837.325.20.95UNSPUNSPUNSPunknUNSPUNSPUNSP
2711992-09-14 13:18PDTYesDMSUSGS1.525.360.010.90FairVegetationLightNONE1Imported Channel 1WADEunspeunkno1.5214.54.100.37UNSPUNSPUNSPunknUNSPUNSPUNSP
2701992-08-17 13:00PDTYesDMSUSGS2.665.430.000.80FairVegetationLightNONE1Imported Channel 1WADEunspeunkno2.6615.74.960.54UNSPUNSPUNSPunknUNSPUNSPUNSP
2691992-07-17 11:25PDTYesKSW/DMSUSGS9.465.520.000.70GoodVegetationLightNONE1Imported Channel 1WADEunspeunkno9.4633.321.50.44UNSPUNSPUNSPunknUNSPUNSPUNSP
2681992-06-22 15:10PDTYesDMSUSGS9.255.510.000.80FairVegetationLightNONE1Imported Channel 1WADEunspeunkno9.2534.422.60.41UNSPUNSPUNSPunknUNSPUNSPUNSP
2671992-05-28 17:55PDTYesDMSUSGS27.15.710.000.60FairClearNONE1Imported Channel 1WADEunspeunkno27.139.027.80.97UNSPUNSPUNSPunknUNSPUNSPUNSP
2661992-04-17 09:30PDTYesDMSUSGS2916.700.010.80GoodClearNONE1Imported Channel 1WADEunspeunkno2911222461.18UNSPUNSPUNSPunknUNSPUNSPUNSP
2651992-04-08 12:05PDTYesDMSUSGS1046.16-0.010.70GoodClearNONE1Imported Channel 1WADEunspeunkno1041301460.71UNSPUNSPUNSPunknUNSPUNSPUNSP
2641992-03-02 12:30PSTYesDMSUSGS5747.40-0.010.70Good NONE1Imported Channel 1WADEunspeunkno5741612542.26UNSPUNSPUNSPunknUNSPUNSPUNSP
2631992-01-15 11:00PSTYesDMSUSGS87.56.230.000.70GoodClearNONE1Imported Channel 1WADEunspeunkno87.51331650.53UNSPUNSPUNSPunknUNSPUNSPUNSP
2621992-01-06 16:00PSTYesDMSUSGS7427.66-0.020.70Fair NONE1Imported Channel 1WADEunspeunkno7421602742.71UNSPUNSPUNSPunknUNSPUNSPUNSP
2611992-01-06 13:15PSTYesDMSUSGS8007.79-0.061.00Good NONE1Imported Channel 1WADEunspeunkno8001423802.11UNSPUNSPUNSPunknUNSPUNSPUNSP
2601991-11-25 12:45PSTYesDMSUSGS15.55.730.010.70Good NONE1Imported Channel 1UNSPother 15.5 UNSPUNSPUNSPunknUNSPUNSPUNSP
2591991-10-04 10:10PDTYesDMSUSGS0.755.450.000.50FairDebrisHeavyNONE1Imported Channel 1WADEunspeunkno0.7510.22.150.35UNSPUNSPUNSPunknUNSPUNSPUNSP
2581991-09-03 15:25PDTYesLAFUSGS1.495.420.000.60FairClearNONE1Imported Channel 1WADEunspeunkno1.4910.42.730.55UNSPUNSPUNSPunknUNSPUNSPUNSP
2571991-08-07 10:30PDTYesDMSUSGS1.955.600.000.60GoodDebrisHeavyNONE1Imported Channel 1WADEunspeunkno1.9511.22.950.66UNSPUNSPUNSPunknUNSPUNSPUNSP
2561991-07-16 15:15PDTYesLAF/JCMUSGS4.685.600.010.70FairClearNONE1Imported Channel 1WADEunspeunkno4.6811.54.061.15UNSPUNSPUNSPunknUNSPUNSPUNSP
2551991-07-03 15:35PDTYesKLMUSGS9.545.720.000.60FairClearNONE1Imported Channel 1WADEunspeunkno9.5433.221.60.44UNSPUNSPUNSPunknUNSPUNSPUNSP
2541991-06-13 14:30PDTYesDMSUSGS11.25.740.001.00PoorClearNONE1Imported Channel 1WADEunspeunkno11.220.26.701.67UNSPUNSPUNSPunknUNSPUNSPUNSP
2531991-05-29 15:00PDTYesJJGUSGS20.85.860.000.70GoodClearNONE1Imported Channel 1WADEunspeunkno20.854.037.10.56UNSPUNSPUNSPunknUNSPUNSPUNSP
2521991-05-22 13:40PDTYesLAFUSGS29.95.930.000.50GoodClearNONE1Imported Channel 1WADEunspeunkno29.952.057.60.52UNSPUNSPUNSPunknUNSPUNSPUNSP