Skip to main content
U.S. flag

An official website of the United States government

WQP beta is currently experiencing an outage. We are working to resolve the outage and hope to have data available again soon. Thank you for your patience. In the meantime, data from WQX can still be accessed via WQP Legacy.

WQP Home >  Providers >  NWIS >  USGS-AR >  USGS-07256500

Spadra Creek at Clarksville, AR (USGS-07256500) 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 "Spadra Creek at Clarksville, AR" and has the identifier USGS-07256500. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)11110202. See more details of this site the the USGS NWIS Web page for this site. This site has a drainage area of 61.10 sq mi.

This site is located in Johnson County County, Arkansas at 35.46833330000000 degrees latitude and -93.4630556000000 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. The source map scale is 1:24000. This site is at an elevation of 347.7 feet and the accuracy of the elevation measurement, collected using the method "GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System" is .19 feet. The vertical coordinate reference system is NAVD88.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-07256500" 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*
Inorganics, Major, Metals 1959 - 1963
Inorganics, Major, Non-metals 1953 - 1963
Inorganics, Minor, Metals 1963 - 1963
Nutrient 1953 - 1963
Organics, Other 1963 - 1963
Physical 1953 - 1988
*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-07256500
MonitoringLocationName Spadra Creek at Clarksville, AR
MonitoringLocationTypeName Stream
HUCEightDigitCode 11110202
DrainageAreaMeasure/MeasureValue 61.10
DrainageAreaMeasure/MeasureUnitCode sq mi
LatitudeMeasure 35.46833330000000
LongitudeMeasure -93.4630556000000
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue 10
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Mapping grade GPS unit (handheld accuracy range 12 to 40 ft)
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 347.7
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue .19
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System
VerticalCoordinateReferenceSystemDatumName NAVD88
CountryCode US
StateCode 05
CountyCode 071
ProviderName NWIS