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Water-Year Summary for Site 08158922

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Max.,Min.,Mean)  

Water year 2024: 2023-10-01 to 2024-09-30
 
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USGS Water-Year Summary 2024
08158922 Williamson Creek at Brush Country Boulevard, Oak Hill, TX
LOCATION - Lat 30°13'34", long 97°50'28" referenced to North American Datum of 1927, Travis County, TX, Hydrologic Unit 12090205, at downstream side of bridge on Brush Country Boulevard near Oak Hill, and 7.7 mi southwest of the State Capitol Building in Austin.
DRAINAGE AREA - 6.79 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Mar. 1993 to Sept. 2003, Oct. 2022 to current year. Water-quality records: Chemical data: Oct. 1993 to Sept. 2001, Oct. 2022 to current year. Biochemical data: Oct. 1993 to Sept. 2000, Oct. 2022 to current year. Sediment data: May 1999 to May 2001.
GAGE -

Water-stage recorder and crest-stage gage. Satellite telemetry at station.

Datum of the gage: 740.343 ft NAVD88 based on a Level 2 Static GNSS survey processed through OPUS, Ref Frame NAD83 (2011)(EPOCH:2010.0000) ITRF2014 (EPOCH:2024.6057) and Geoid 18. The survey was completed on August 9th, 2024, while occupying a TRM referenced to local gage datum via differential levels. 

Prior to 8/9/2024, the datum of the gage was 740.25 ft NGVD29 from levels to a city of Austin benchmark: D18*1401. 

REMARKS - Records poor. No known regulation or diversions. No flow at times. Some records listed in the "Period of Record" for surface water and water quality may not be available electronically.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Chemical data: Oct. 1993 to Sept. 2001, Oct. 2022 to current year. Biochemical data: Oct. 1993 to Sept. 2000, Oct. 2022 to current year. Sediment data: May 1999 to May 2001.
INSTRUMENTATION - Stage-activated automatic sampler.
REMARKS - Water quality samples are collected for selected storm events.