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


Page Loading - Please Wait...

Click to hideNews Bulletins

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 11162735 SAN MATEO C AB JUNCTION BOX A DAM1 NR HILLSBOROUGH


San Mateo County, California
Hydrologic Unit Code 18050004
Latitude  37°33'25.1", Longitude 122°25'05.7" NAD83
Drainage area 2.1  square miles
Gage datum 648.36 feet above NAVD88
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)
412025-11-18 12:18:21PSTYesMDAVAULTUSGS0.480.42-0.010.60PoorVegetationHeavyNONE11WADEQSCMMVADV0.4810.03.730.13FIRMLDGEEVENSTDYUNEVNSTDDNST5.00
402025-08-07 14:47PDTYesMDAVAULT/JEVUSGS0.00 Unspecified NONE11OTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
392025-07-03 15:14:39PDTYesAGUERRIEUSGS0.030.300.000.40PoorVegetationHeavyNONE1Channel 1WADEQSCMMVADV0.0310.82.540.01FIRMLDGEUNEVSTDYEVENSTNDDNST5.00
382025-05-28 15:16:51PDTYesMDAVAULTUSSG0.260.310.010.50PoorVegetationHeavyNONE11WADEQSCMMVADV0.2610.22.660.10FIRMLDGEEVENSTDYEVENSTNDDNST10.00
372025-04-24 11:14:03PDTYesMDAVAULTUSGS0.720.310.010.40FairVegetationModerateNONE11WADEQSCMMVADV0.7210.22.740.26FIRMLDGEEVENSTDYUNEVSTNDDNST10.00
362025-03-11 12:54:25PDTYesMDAVAULTUSGS1.280.350.010.60FairVegetationLightNONE11WADEQSCMMVADV1.2810.33.190.40FIRMLDGEEVENSTDYEVENSTNDDNST10.00
352025-02-10 11:06:31PSTYesTNAKAMURA/RBUSGS10.40.67-0.010.50GoodClearOTHR11WADEQSCMMVADV10.09.705.751.74FIRMLDGEEVENSTDYEVENSTNDDNST5.00
34D2025-02-04 17:30PSTYesTNAKAMURA/MDUSGS81.01.850.000.10Poor NONE11UNSPother 81.0 FIRMLDGEEVENSTDYEVENSTNDDNST20.00
34C2025-02-04 17:00PSTYesTNAKAMURA/MDUSGS72.91.740.000.10Poor NONE11UNSPother 72.9 FIRMLDGEEVENSTDYUNEVSTNDUPST20.00
34B2025-02-04 11:00PSTYesTNAKAMURA/MDUSGS57.71.600.000.10Poor NONE11UNSPother 57.7 FIRMLDGEEVENSTDYUNEVSTNDDNST20.00
34A2025-02-04 09:30PSTYesTNAKAMURA/MDUSGS50.71.470.000.10Poor NONE11UNSPother 50.7 FIRMLDGEEVENSTDYEVENSTNDDNST20.00
342025-01-06 11:26:21PSTYesTNAKAMURAUSGS2.810.420.000.40GoodVegetationLightNONE11WADEQSCMMVADV2.8110.13.900.72FIRMLDGEEVENSTDYEVENSTNDDNST5.00
33A2024-12-29 12:00PSTYesTNAKAMURA/MDUSGS27.91.040.000.10Poor NONE11UNSPother 27.9 FIRMLDGEEVENSTDYEVENSTNDDNST20.00
332024-12-03 13:04:59PSTYesMDAVAULTUSGS0.480.290.010.40FairVegetationModerateNONE11WADEQSCMMVADV0.4810.42.510.19FIRMLDGEEVENSTDYEVENSTNDDNST10.00
322024-10-24 12:00PDTYesTNAKAMURA/DMUSGS0.00 UnspecifiedNoFlowNONE11OTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
312024-07-17 13:02:25PDTYesMDAVAULTUSGS0.030.260.010.50PoorVegetationHeavyNONE11WADEQSCMMVADV0.034.801.090.03FIRMLDGEEVENSTDYUNEVSTNDDNST10.00
302024-06-05 13:19:34PDTYesMDAVAULT/JEVUSGS0.350.350.000.70PoorVegetationModerateNONE11WADEQSCMMVADV0.3510.23.070.11FIRMLDGEEVENSTDYEVENSTNDDNST10.00
292024-04-23 12:38:51PDTYesMDAVAULTUSGS1.720.380.000.40GoodDebrisModerateNONE11WADEQSCMMVADV1.7210.13.410.50FIRMLDGEEVENSTDYEVENSTNDATGA0.00
282024-03-25 11:49:31PDTYesMDAVAULTUSGS3.380.440.000.60FairDebrisModerateNONE11WADEQSCMMVADV3.3810.34.080.83FIRMLDGEEVENSTDYEVENSTNDATGA0.00
272024-02-27 13:05:15PSTYesMDAVAULTUSGS5.460.520.000.30GoodClearNONE11WADEQSCMMVADV5.4610.24.931.11FIRMLDGEEVENSTDYEVENSTNDATGA0.00
262024-01-26 15:37:58PSTYesMDAVAULTUSGS11.50.710.000.40GoodClearNONE11WADEQSCMMVADV11.510.57.111.62FIRMLDGEEVENSTDYEVENSTNDDNST10.00
252023-12-22 12:24:09PSTYesMDAVAULTusgs0.540.390.000.50FairVegetationHeavyNONE11WADEQSCMMVADV0.5410.23.500.15FIRMLDGEEVENSTDYEVENSTNDDNST10.00
242023-10-12 15:45PDTYesTNAKAMURA/MDUSGS0.00 UnspecifiedNoFlowNONE11OTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
232023-07-18 14:20:07PDTYesMDAVAULTUSGS0.050.290.000.50PoorVegetationHeavyNONE11WADEQSCMMVADV0.059.902.530.02FIRMLDGEEVENSTDYUNEVUNKNDNST10.00
222023-06-15 10:52PDTYesMDAVAULTUSGS0.250.340.000.60PoorVegetationHeavyNONE11WADEQSCMMVADV0.2510.13.050.08FIRMLDGEEVENSTDYUNEVSTNDDNST10.00
212023-05-11 14:24:57PDTYesMDAVAULT/LCAUSGS0.840.360.000.50FairVegetationLightNONE11WADEQSCMMVADV0.8410.43.300.26FIRMLDGEEVENSTDYEVENSTNDATGA0.00
202023-03-23 11:53:30PDTYesMDAVAULTUSGS32.51.14-0.010.60GoodClearNONE11WADEQSCMMVADCP32.510.413.82.36FIRMLDGEEVENSTDYUNSPSTNDATGA0.00
192023-03-01 14:57:40PSTYesMDAVAULTUSGS16.40.810.000.50FairClearNONE11WADEQSCMMVADV16.410.08.132.02FIRMLDGEEVENSTDYEVENSTNDDNST10.00
182023-01-25 13:13:10PSTYesMDAVAULTUSGS3.970.450.000.40FairClearNONE11WADEQSCMMVADV3.979.903.691.08FIRMLDGEEVENSTDYEVENSTNDATGA0.00
172022-12-29 09:53:18PSTYesMDAVAULTUSGS4.340.480.000.60FairDebrisLightNONE11WADEQSCMMVADV4.3410.76.610.66FIRMLDGEEVENSTDYEVENSTNDATGA0.00
162022-12-27 14:24:13PSTYesMDAVAULTUSGS22.80.96-0.030.40GoodClearNONE11WADEQSCMMVADV22.810.912.81.79FIRMLDGEEVENSTDYEVENSTNDATGA0.00
152022-12-13 12:32:17PSTYesMDAVAULTUSGS0.200.320.000.60FairDebrisModerateNONE11WADEQSCMMVADV0.2010.64.620.04FIRMLDGEEVENSTDYEVENSTNDATGA0.00
142022-10-19 11:43PDTYesMDAVAULT/BDCUSGS0.00 Unspecified NONE11OTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
132022-07-21 12:02:15PDTYesMDAVAULTUSGS0.00 UnspecifiedNoFlowNONE11OTHRother 0.00 UNSPUNSPUNSPUNSPUNSPUNSPATGA0.00
122022-06-15 17:08:28PDTYesMDAVAULTUSGS0.050.210.000.20PoorDebrisHeavyNONE11WADEQSCMMVADV0.0511.04.290.01FIRMLDGEEVENSTDYEVENSTNDATGA0.00
112022-05-06 11:03:04PDTYesRCTHOMASUSGS0.210.240.000.40PoorDebrisLightNONE11WADEQSCMMVADV0.2110.22.540.08FIRMLDGEEVENSTDYEVENSTNDATGA0.00
102022-03-25 14:55:24PDTYesLCANNAR/RCTHUSGS0.290.230.000.60FairVegetationModerateNONE11WADEQSCMMVADV0.2910.62.180.13FIRMLDGEEVENSTDYEVENSTNDUNSP
92022-02-23 14:28:13PSTYesLCANNAR/SMULUSGS0.380.240.000.70FairVegetationLightNONE11WADEQSCMMVADV0.3811.12.320.16FIRMLDGEEVENSTDYEVENSTNDATGA0.00
8F2021-12-15 14:00PSTNo
7F2019-02-13 12:48PSTNo
6F2019-01-15 13:20PSTNo
5F2017-03-22 14:30PDTNo
4F2016-12-09 11:55PSTNo
3F2015-05-14 15:00PDTNo
2F2011-02-16 11:40PSTNo
1F2010-12-20 11:29PSTNo