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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 user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  NWIS >  USGS-TX >  USGS-303430098244300

Lk LBJ nr Sandy Ck nr Granite Shoals, TX (USGS-303430098244300) site data in the Water Quality Portal

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

This lake, reservoir, impoundment site, maintained by the USGS Texas Water Science Center (identifier USGS-TX), has the name "Lk LBJ nr Sandy Ck nr Granite Shoals, TX" and has the identifier USGS-303430098244300. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)12090201. See more details of this site the the USGS NWIS Web page for this site.

This site is located in Llano County County, Texas at 30.57500000000000 degrees latitude and -98.4120000000000 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 3 seconds. The source map scale is 1:24000. This site is at an elevation of 825 feet and the accuracy of the elevation measurement, collected using the method "Reported method of determination." is 10 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-303430098244300" 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, Non-metals 2007 - 2008
Nutrient 2007 - 2008
Organics, Other 2007 - 2008
Physical 2007 - 2008
*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-TX
OrganizationFormalName USGS Texas Water Science Center
MonitoringLocationIdentifier USGS-303430098244300
MonitoringLocationName Lk LBJ nr Sandy Ck nr Granite Shoals, TX
MonitoringLocationTypeName Lake, Reservoir, Impoundment
HUCEightDigitCode 12090201
LatitudeMeasure 30.57500000000000
LongitudeMeasure -98.4120000000000
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue 3
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Mapping grade GPS unit (handheld accuracy range 12 to 40 ft)
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 825
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue 10
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Reported method of determination.
VerticalCoordinateReferenceSystemDatumName NGVD29
CountryCode US
StateCode 48
CountyCode 299
ProviderName NWIS