Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

WQP Home >  Providers >  NWIS >  USGS-TX >  USGS-293050097293899

San Marcos Rv at Hwy 90A nr Gonzales, TX (USGS-293050097293899) 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 Texas Water Science Center (identifier USGS-TX), has the name "San Marcos Rv at Hwy 90A nr Gonzales, TX" and has the identifier USGS-293050097293899. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)12100203. See more details of this site the the USGS NWIS Web page for this site. This site has a drainage area of 1354 sq mi and the contributing drainage area is 1354 sq mi.

This site is located in Gonzales County County, Texas at 29.51412490000000 degrees latitude and -97.4941601000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from MAP." and the accuracy is 5 seconds. The source map scale is 1:24000. This site is at an elevation of 255 feet and the accuracy of the elevation measurement, collected using the method "Interpolated from topographic map." 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-293050097293899" 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 1997 - 1998
Inorganics, Major, Metals 1997 - 1998
Inorganics, Major, Non-metals 1997 - 1998
Inorganics, Minor, Metals 1997 - 1998
Inorganics, Minor, Non-metals 1997 - 1997
Microbiological 1998 - 1998
Nutrient 1997 - 1998
Organics, Other 1997 - 1998
Organics, Pesticide 1997 - 1998
Physical 1997 - 1998
Radiochemical 1997 - 1997
Sediment 1997 - 1998
*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-293050097293899
MonitoringLocationName San Marcos Rv at Hwy 90A nr Gonzales, TX
MonitoringLocationTypeName Stream
HUCEightDigitCode 12100203
DrainageAreaMeasure/MeasureValue 1354
DrainageAreaMeasure/MeasureUnitCode sq mi
ContributingDrainageAreaMeasure/MeasureValue 1354
ContributingDrainageAreaMeasure/MeasureUnitCode sq mi
LatitudeMeasure 29.51412490000000
LongitudeMeasure -97.4941601000000
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue 5
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolated from MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 255
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue 10
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Interpolated from topographic map.
VerticalCoordinateReferenceSystemDatumName NGVD29
CountryCode US
StateCode 48
CountyCode 177
ProviderName NWIS