Click
to
hide
Water-Year
Summary
instructions
and
information
- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
08108700 Brazos River at State Highway 21 near Bryan, TX
LOCATION - Lat 30°37'36", long 96°32'38" referenced to North American Datum of 1927, Burleson County, TX, Hydrologic Unit 12070101, on right bank, 8 ft downstream from bridge on State Highway 21, 2.1 mi upstream from Little Brazos River, and 10.5 mi west of Bryan.
DRAINAGE AREA - 39,049 mi² of which 9,566 mi² probably is noncontributing.
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1993 to current year.
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Sept. 1961 to Sept. 1965.
BIOCHEMICAL DATA: Sept. 1961 to Sept. 1965.
GAGE -
Water-stage recorder. Satellite telemetry at station.
Datum of the gage: 188.783 ft NAVD88 based on a Level 2 Static GNSS survey processed through OPUS and Ref Frame NAD83 (2011)(EPOCH:2010.0000) ITRF2014 (EPOCH:2021.7090) and Geoid 18. The survey was completed 9/16/2021 while occupying a TRM referenced to local datum via differential levels.
Prior to 9/16/2021, the datum of the gage was 189.30 ft NGVD29 by Levels.
REMARKS - Records fair. Since installation of gage at least 10% of contributing drainage area has been regulated. Many small diversions above station for irrigation, municipal, industrial, and oil field operation. Some records listed in the "Period of Record" for surface water and water quality may not be available electronically.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Dec. 5, 1913, reached a stage of 61 ft, present site and datum, from information by Texas and New Orleans Railroad Co. at their bridge 200 ft upstream. Flood in 1854 reached about the same stage as flood of Dec. 5, 1913.
