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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 383317121584601 WILLOW CANAL BL CHAPMAN RESERVOIR NR WINTERS CA
Yolo County, California
Hydrologic Unit Code 18020163
Latitude  38°33'17", Longitude 121°58'46" NAD27
Gage datum 150 feet above NGVD29
Output formats
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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 
112011-06-02 15:55PDTYesBTYUSGS18.91.050.001.10FairClearNONE
102010-05-21 12:33:30PDTYesBTYUSGS51.72.110.001.00FairClearNONE
92009-06-18 15:39:30PDTYesBTYUSGS23.91.420.011.10FairDebrisLightNONE
82009-06-05 11:22PDTYesBTYUSGS63.62.500.001.10FairClearNONE
72009-05-29 14:21PDTYesBTYUSGS40.01.88-0.051.10FairClearNONE
62008-04-25 12:31PDTYesBTYUSGS36.81.800.001.00FairClearNONE
52006-10-26 12:33PDTYesBTYUSGS39.31.870.000.80PoorClearNONE
42006-10-26 11:38PDTYesBTYUSGS27.41.480.000.50PoorClearNONE
32006-10-26 10:44PDTYesBTYUSGS17.31.100.000.50PoorClearNONE
22006-10-26 09:53PDTYesBTYUSGS6.530.590.000.40PoorClearNONE
12006-10-20 10:35PDTYesBTYUSGS11.23.370.000.40PoorClearNONE