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


Page Loading - Please Wait...

Click to hideNews Bulletins
  • Due to a lapse in government funding, the majority of USGS websites will not be updated except to provide important public safety information. Websites displaying real-time water data will be updated with limited support. For more information please see www.doi.gov/shutdown.
  • Explore the NEW USGS National Water Dashboard interactive map to access real-time water data from over 13,500 stations nationwide.

Streamflow Measurements for the Nation


USGS 10263675 BIG ROCK C WASH A HWY 138 NR LLANO CA
Los Angeles County, California
Hydrologic Unit Code 18090206
Latitude  34°30'21", Longitude 117°50'45" NAD27
Drainage area 53.1  square miles
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
Reselect output format
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)
221993-03-17 10:30PSTYesERHUSGS61.1 PoorClearNONE1Imported Channel 1WADEunspeunkno61.116.714.64.18UNSPUNSPUNSPunknUNSPUNSPUNSP
21W1993-03-11 13:55PSTYesERHUSGS52.4 PoorClearNONE1Imported Channel 1WADEunspeunkno52.416.814.13.72UNSPUNSPUNSPunknUNSPUNSPUNSP
20W1993-01-21 09:15PSTYesERHUSGS82.1 PoorClearNONE1Imported Channel 1WADEunspeunkno82.131.521.03.91UNSPUNSPUNSPunknUNSPUNSPUNSP
10W1992-06-17 12:35PDTYesMJD/JGHUSGS0.604.84 Fair NONE1Imported Channel 1OTHRother 0.60 UNSPUNSPUNSPunknUNSPUNSPUNSP
9W1992-06-11 09:20PDTYesJCB/JLOUSGS1.374.960.000.30Fair NONE1Imported Channel 1WADEunspeunkno1.379.501.880.73UNSPUNSPUNSPunknUNSPUNSPUNSP
191992-06-11 09:00PDTYesJCB/JLOUSGS0.282.060.000.20Fair NONE1Imported Channel 1WADEunspeunkno0.285.300.470.60UNSPUNSPUNSPunknUNSPUNSPUNSP
181992-05-15 11:20PDTYesJCB/JLOUSGS8.462.520.000.20FairDebrisHeavyNONE1Imported Channel 1WADEunspeunkno8.469.004.601.84UNSPUNSPUNSPunknUNSPUNSPUNSP
8W1992-05-15 10:45PDTYesJCB/JLOUSGS33.95.500.200.40GoodDebrisHeavyNONE1Imported Channel 1WADEunspeunkno33.926.014.92.28UNSPUNSPUNSPunknUNSPUNSPUNSP
7W1992-05-12 16:20PDTYesJCB/JLOUSGS32.45.60 GoodDebrisHeavyNONE1Imported Channel 1WADEunspeunkno32.427.014.12.30UNSPUNSPUNSPunknUNSPUNSPUNSP
171992-05-12 15:30PDTYesJCB/JLOUSGS7.932.42 FairDebrisHeavyNONE1Imported Channel 1WADEunspeunkno7.9312.04.021.97UNSPUNSPUNSPunknUNSPUNSPUNSP
161992-04-30 14:30PDTYesJCBUSGS8.95 PoorDebrisHeavyNONE1Imported Channel 1WADEunspeunkno8.9512.04.052.21UNSPUNSPUNSPunknUNSPUNSPUNSP
6W1992-04-30 08:20PDTYesJCBUSGS49.95.420.000.30FairDebrisHeavyNONE1Imported Channel 1WADEunspeunkno49.930.012.14.12UNSPUNSPUNSPunknUNSPUNSPUNSP
5W1992-03-12 12:10PSTYesJAUSGS5.56 FairDebrisHeavyNONE1Imported Channel 1WADEunspeunkno5.568.002.642.11UNSPUNSPUNSPunknUNSPUNSPUNSP
151992-03-12 11:35PSTYesJAUSGS10.8 FairDebrisHeavyNONE1Imported Channel 1WADEunspeunkno10.817.04.442.43UNSPUNSPUNSPunknUNSPUNSPUNSP
4W1992-02-18 17:00PSTYesJAUSGS3.10 FairClearNONE1Imported Channel 1WADEunspeunkno3.108.502.241.38UNSPUNSPUNSPunknUNSPUNSPUNSP
3W1992-02-13 10:05PSTYesJAUSGS40.57.89-0.050.20PoorClearNONE1Imported Channel 1WADEunspeunkno40.518.010.23.97UNSPUNSPUNSPunknUNSPUNSPUNSP
141992-02-13 09:45PSTYesJAUSGS1344.410.060.30PoorClearNONE1Imported Channel 1WADEunspeunkno13452.031.44.27UNSPUNSPUNSPunknUNSPUNSPUNSP
131992-02-12 09:30PSTYesJAUSGS1384.150.000.30PoorClearNONE1Imported Channel 1WADEunspeunkno13844.031.54.38UNSPUNSPUNSPunknUNSPUNSPUNSP
2W1992-02-11 11:20PSTYesJAUSGS54.86.03-0.030.20PoorClearNONE1Imported Channel 1WADEunspeunkno54.822.513.64.03UNSPUNSPUNSPunknUNSPUNSPUNSP
121992-02-11 09:25PSTYesJAUSGS2984.38-0.130.40PoorClearNONE1Imported Channel 1WADEunspeunkno29887.056.85.25UNSPUNSPUNSPunknUNSPUNSPUNSP
111991-04-18 13:05PDTYesJAUSGS2.081.90-0.010.50FairClearNONE1Imported Channel 1WADEunspeunkno2.088.502.440.85UNSPUNSPUNSPunknUNSPUNSPUNSP
101991-04-17 10:40PDTYesJAUSGS1.871.860.000.40FairClearNONE1Imported Channel 1WADEunspeunkno1.877.001.821.03UNSPUNSPUNSPunknUNSPUNSPUNSP
91991-03-05 14:07PSTYesJAUSGS10.22.18-0.010.40PoorClearNONE1Imported Channel 1WADEunspeunkno10.212.04.432.30UNSPUNSPUNSPunknUNSPUNSPUNSP
81991-03-02 10:05PSTYesJAUSGS11.92.220.000.50FairClearNONE1Imported Channel 1WADEunspeunkno11.911.24.442.68UNSPUNSPUNSPunknUNSPUNSPUNSP
1W1991-03-01 10:00PSTYesJAUSGS1065.60-0.060.20PoorClearNONE1Imported Channel 1WADEunspeunkno10638.020.35.22UNSPUNSPUNSPunknUNSPUNSPUNSP
71991-03-01 09:17PSTYesJAUSGS1283.030.360.20PoorClearNONE1Imported Channel 1WADEunspeunkno12835.021.45.98UNSPUNSPUNSPunknUNSPUNSPUNSP
61989-02-27 16:40PSTYesJAUSGS0.863.51-0.010.50FairClearNONE1Imported Channel 1WADEunspeunkno0.865.201.360.63UNSPUNSPUNSPunknUNSPUNSPUNSP
51989-02-16 12:40PSTYesJAUSGS0.383.430.000.30FairClearNONE1Imported Channel 1WADEunspeunkno0.383.550.760.50UNSPUNSPUNSPunknUNSPUNSPUNSP
41988-12-27 10:10PSTYesJAUSGS3.473.630.060.40FairIceCoverNONE1Imported Channel 1WADEunspeunkno3.4710.04.050.86UNSPUNSPUNSPunknUNSPUNSPUNSP
31988-12-22 11:05PSTYesJAUSGS4.323.670.000.40FairClearNONE1Imported Channel 1WADEunspeunkno4.329.703.591.20UNSPUNSPUNSPunknUNSPUNSPUNSP
21988-12-16 09:15PSTYesJAUSGS2.593.600.010.40FairClearNONE1Imported Channel 1WADEunspeunkno2.599.002.451.06UNSPUNSPUNSPunknUNSPUNSPUNSP
11988-12-12 12:30PSTYesJAUSGS0.103.300.000.10GoodClearNONE1Imported Channel 1OTHRQFLUM 0.10 UNSPUNSPUNSPunknUNSPUNSPUNSP