USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

USGS 342507118380301 SANTA CLARA R 0.3 MI BL CASTAIC C NR VALENCIA CA

Los Angeles County, California

Hydrologic Unit Code 18070102

Latitude 34°25'07", Longitude 118°38'03" NAD27

Drainage area 606 square miles

Gage datum 925 feet above NGVD29

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Meas. Number	Date Time	Time Datum	Measurement Used?	Who	Measuring Agency	Stream flow (ft³/s)	GH Change (ft)	Meas. Duration (hr)	Meas. Rated	Control	Flow Adjust. Code
113	2000-05-04 17:00	PDT	Yes	MCS	USGS	43.4			Good	Clear	NONE
112	2000-05-04 08:00	PDT	Yes	MCS	USGS	35.8			Fair	Clear	NONE
111	2000-05-03 20:50	PDT	Yes	MJ	USGS	40.9			Fair	Clear	NONE
110	2000-05-03 15:30	PDT	Yes	MJ	USGS	39.4	-0.02	0.60	Fair	Clear	NONE
109	2000-05-03 12:05	PDT	Yes	RHT	USGS	39.7	0.01	0.60	Good	Clear	NONE
108	2000-05-03 08:40	PDT	Yes	RHT	USGS	37.1	-0.01	0.70	Good	Clear	NONE
107	2000-05-03 04:50	PDT	Yes	RHT	USGS	40.3	0.02	0.60	Good	Clear	NONE
106	2000-05-02 10:35	PDT	Yes	RHT	USGS	36.4	0.01	0.60	Good	Clear	NONE
105	2000-05-02 06:50	PDT	Yes	RHT	USGS	37.6	0.02	0.60	Good	Clear	NONE
104	2000-04-30 18:10	PDT	Yes	ERH	USGS	44.1			Fair	Clear	NONE
103	2000-04-30 12:15	PDT	Yes	JK	USGS	40.8			Fair	Clear	NONE
102	1999-10-19 12:45	PDT	Yes	MCS	USGS	23.1			Fair	Clear	NONE
101	1999-10-19 07:10	PDT	Yes	RHT	USGS	26.9			Good	Clear	NONE
100	1999-10-19 01:50	PDT	Yes	MCS	USGS	23.0			Good	Clear	NONE

U.S. Department of the Interior | U.S. Geological Survey
Title: Surface Water for USA: Streamflow Measurements
URL: https://waterdata.usgs.gov/nwis/measurements?

Page Contact Information: California Water Data Support Team
Page Last Modified: 2025-09-05 10:30:00 EDT
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