Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins
  • Due to a lapse in government funding, this website will not be updated except to provide important public safety information. For more information please visit: www.doi.gov/shutdown.
  • Explore the NEW USGS National Water Dashboard interactive map to access real-time water data from over 13,500 stations nationwide.

Streamflow Measurements for the Nation

USGS 08150700 Llano Rv nr Mason, TX

Mason County, Texas
Hydrologic Unit Code 12090204
Latitude  30°39'38", Longitude  99°06'32" NAD27
Drainage area 3,247  square miles
Contributing drainage area 3,242  square miles
Gage datum 1,225.60 feet above NAVD88

Period of record
Begin Date End Date Count
1968-01-19 2025-08-25 519

 
Choose Output Format

Retrieve Streamflow measurement data for Selected Sites
Choose one of the following options for displaying data for the sites meeting the criteria above
?
Retrieve data from: to: (YYYY-MM-DD -- Blank = all data)
?
Graphs of data
?
Table of data
?
Tab-separated data *

 * Save compressed files with a .gz file extension.