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New WQX 3.0 profiles are available at waterqualitydata.us/beta/. These profiles will contain recent USGS data added since March 11, 2024, which marks the beginning of limited accessibility for USGS data. Read more about the 3.0 profiles and associated changes here.

This legacy user interface will continue to function for several weeks. However, this user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  NWIS >  USGS-AR >  USGS-07263450

Arkansas River at Murray Dam near Little Rock, AR (USGS-07263450) site data in the Water Quality Portal

Data Provider: NWIS (Learn more about Water Quality Portal Data Providers)

This stream site, maintained by the USGS Arkansas Water Science Center (identifier USGS-AR), has the name "Arkansas River at Murray Dam near Little Rock, AR" and has the identifier USGS-07263450. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)11110207. See more details of this site the the USGS NWIS Web page for this site. This site has a drainage area of 158138 sq mi and the contributing drainage area is 135897 sq mi.

This site is located in Pulaski County County, Arkansas at 34.79305556000000 degrees latitude and -92.3583333000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Mapping grade GPS unit (handheld accuracy range 12 to 40 ft)" and the accuracy is 10 seconds. This site is at an elevation of 223.61 feet and the accuracy of the elevation measurement, collected using the method "Level or other surveyed method." is .01 feet. The vertical coordinate reference system is NGVD29.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-07263450" into the "Site ID" box under Site Parameters

What other monitoring locations are upstream or downstream from this one?

Upstream and downstream locations

This map shows all Water Quality Portal stations that are 10 miles upstream (dashed dark blue) and 10 miles downstream (solid light blue) of this monitoring location (indicated by the large blue circle). The upstream and downstream functionality is provided by the Network Linked Data Index.

When were data collected at this location?

Periods of record for data characteristic groups

For a more detailed breakdown of data, go to the Monitoring Report at the EPA How's My Waterway Application
Characteristic Group Date Range*
Information 1985 - 1994
Inorganics, Major, Metals 1975 - 1980
Inorganics, Major, Non-metals 1975 - 1994
Inorganics, Minor, Metals 1975 - 1994
Inorganics, Minor, Non-metals 1975 - 1986
Microbiological 1974 - 1993
Nutrient 1975 - 1994
Organics, Other 1988 - 1994
Organics, PCBs 1979 - 1987
Organics, Pesticide 1975 - 1987
Physical 1975 - 1994
*Date ranges may contain gap years

What other information is available for this location?

Detailed Metadata

For the definitions of the metadata elements, please go to the Water Quality Portal user guide

Location Metadata Value
OrganizationIdentifier USGS-AR
OrganizationFormalName USGS Arkansas Water Science Center
MonitoringLocationIdentifier USGS-07263450
MonitoringLocationName Arkansas River at Murray Dam near Little Rock, AR
MonitoringLocationTypeName Stream
HUCEightDigitCode 11110207
DrainageAreaMeasure/MeasureValue 158138
DrainageAreaMeasure/MeasureUnitCode sq mi
ContributingDrainageAreaMeasure/MeasureValue 135897
ContributingDrainageAreaMeasure/MeasureUnitCode sq mi
LatitudeMeasure 34.79305556000000
LongitudeMeasure -92.3583333000000
HorizontalAccuracyMeasure/MeasureValue 10
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Mapping grade GPS unit (handheld accuracy range 12 to 40 ft)
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 223.61
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue .01
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Level or other surveyed method.
VerticalCoordinateReferenceSystemDatumName NGVD29
CountryCode US
StateCode 05
CountyCode 119
ProviderName NWIS