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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Biological Water-quality 2009-08-20 2009-08-20
Information Water-quality 2000-10-24 2009-08-20
Inorganics, Major, Non-metals Water-quality 2009-08-20 2009-08-20
Nutrient Water-quality 2009-08-20 2009-08-20
Physical Daily Values, Unit Values, Water-quality 1968-03-07 2024-11-21
n/a Peak Measurements 1889-01-01 2023-05-20
n/a Site Visits 1968-01-19 2024-08-20
n/a USGS Annual Water Data Reports Site 2005-01-01 2023-01-01
Water Data for the Nation inventory

Monitoring location 08150700 is associated with a Stream in Mason County, Texas. Current conditions of Discharge, Gage height, and Precipitation are available. Water data back to 1889 are available online.

Datum of gage has been determined to be 1225.60 feet above NAVD 1988. To obtain water-surface elevations in NAVD 1988 add 1225.60 feet to gage height values.
Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
08150700 n/a
Site name
Llano Rv nr Mason, TX n/a
Site type
Stream
ST
DMS latitude 303938 n/a
DMS longitude 0990632 n/a
Decimal latitude 30.66073685 n/a
Decimal longitude -99.1092185 n/a
Latitude-longitude method
Interpolated from MAP. M
Latitude-longitude accuracy
Accurate to + or - 5 sec. F
Latitude-longitude datum
North American Datum of 1927 NAD27
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
Texas 48
State
Texas 48
County
Mason County 319
Country US n/a
Land net location description n/a
Name of location map Art, TX n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 1225.60 feet n/a
Method altitude determined GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System X
Altitude accuracy .24 feet n/a
Altitude datum
North American Vertical Datum of 1988 NAVD88
Subbasin hydrologic unit
12090204
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site NNNNYNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
3247 square miles n/a
Contributing drainage area 3242 square miles n/a
Time Zone abbreviation CST n/a
Site honors Daylight Saving Time
Y n/a
Data reliability
n/a
Data-other GW files NYNNNNNN 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
Project number 8653-00160 n/a

Operated in cooperation with:

logo for Lower Colorado River Authority
Lower Colorado River Authority
logo for USGS - Cooperative Matching Funds
USGS - Cooperative Matching Funds