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


Page Loading - Please Wait...

Click to hideNews Bulletins
! This page is undergoing modernization with expected decommissioning as key features are added to the modernized pages.
Learn more about our modernization plans to find out which options will suit you best. Next Generation Monitoring Location Page is available now.
A beta version of the My Favorites page is available in WDFN. Try it out and tell us what you think at wdfn@usgs.gov

USGS 08150700 Llano Rv nr Mason, TX

PROVISIONAL DATA SUBJECT TO REVISION

Click to hidestation-specific text
Funding for this site is provided by the cooperators / programs below:
Click to go to the Lower Colorado River Authority web page

Lower Colorado River Authority

 Click to go to the Cooperative Matching Funds web page

Cooperative Matching Funds
 
Rainfall Disclaimer

retransmission, forecasts and summary of this location by the National Weather Service
Retransmission, forecasts and summary by the National Weather Service

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.

This station managed by the San Angelo Field Unit.

Available Parameters Available Period
  
2025-06-03  2025-10-01
1997-10-02  2025-10-01
2007-10-01  2025-10-01







 (7)
 
  -- or --

 

 
Summary of all available data for this site
Instantaneous-data availability statement

Precipitation, total, inches
Most recent instantaneous value: 0.00 10-01-2025   01:15 CDT
Graph of Precipitation, total, inches

Add up to 2 more sites and replot for "Precipitation, total, inches"

?
 
Note



Create presentation-quality / stand-alone graph.   Subscribe to
?
WaterAlert      

See this graph on the Monitoring Location Pages

Share this graph |


Discharge, cubic feet per second
Most recent instantaneous value: 76.3 10-01-2025   01:15 CDT
Graph of Discharge, cubic feet per second

Add up to 2 more sites and replot for "Discharge, cubic feet per second"

?
 
Note



Create presentation-quality / stand-alone graph.   Subscribe to
?
WaterAlert      

See this graph on the Monitoring Location Pages

Share this graph |

Daily discharge, cubic feet per second -- statistics for Oct 1 based on 53 water years of record more
Min
(2012)		 Most Recent
Instantaneous
Value Oct 1		 25th
percen-
tile		 Median Mean 75th
percen-
tile		 Max
(2022)
41.8 76.3 83 134 207 220 1580

Gage height, feet, [Gage Height - Primary]
Most recent instantaneous value: 5.40 10-01-2025   01:15 CDT
Graph of Gage height, feet, [Gage Height - Primary]

Add up to 2 more sites and replot for "Gage height, feet, [Gage Height - Primary]"

?
 
Note



Create presentation-quality / stand-alone graph.   Subscribe to
?
WaterAlert      

See this graph on the Monitoring Location Pages

Share this graph |