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Available data

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Continuous data

3 data types available - data from 2015-10-01 to 2026-08-06

Daily data

2 data types available - data from 2018-11-29 to 2026-08-05

Field measurements

6 data types available - data from 1985-09-19 to 2026-07-14

Discrete sample data

86 Observed properties (data types) available - with data from 1969-08-25 to 2026-07-07

680 Sampling activities

Peak measurements

2 data types available - with data from 1960-12-07 to 2016-04-10

Statistical tables for select daily data types

2 data types available - data from 2018-11-29 to 2026-08-05

Important information about this monitoring location

The elevation of this site is 133.24 feet above NAVD 1988. To convert gage height to stream water level elevation above NAVD 1988, add 133.24 feet to gage height values.

Location details and information

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USGS - Federal Priority Streamgages

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	09429500	n/a
Location name	COLORADO RIVER BELOW IMPERIAL DAM, AZ-CA	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	32.8675833333333	n/a
Decimal longitude (WGS84)	-114.472111111111	n/a
Latitude-longitude method	Mapping grade GPS unit (handheld accuracy range 12 to 40 ft)	G
Latitude-longitude accuracy	Accurate to + or - 10 sec.	T
District	Arizona	04
State	California	06
County	Imperial County	025
Country	United States of America	n/a
Altitude of gage/land surface	133.24 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.22 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Lower Colorado	15030107
Drainage basin		n/a
Date of first construction		n/a
Drainage area	188500 square miles	n/a
Contributing drainage area	184500 square miles	n/a
Time zone abbreviation	MST	n/a
Site honors Daylight Saving Time	N	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a

Monitoring location Colorado River Below Imperial Dam, Az-ca - USGS-09429500