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- 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.
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USGS Water-Year Summary 2024
08158970 Williamson Creek at Jimmy Clay Road, Austin, TX
LOCATION - Lat 30°11'21", long 97°43'56" referenced to North American Datum of 1927, Travis County, TX, Hydrologic Unit 12090205, at culvert on Jimmy Clay Road 0.5 mi southeast of Nuckles Crossing Road and 6.0 mi south of State Capitol building in Austin.
DRAINAGE AREA - 27.6 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Nov. 1974 to Sept. 1975 (periodic discharge measurements only), Sept. 1975 to Sept. 1986, Aug. 2007 to current year.
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Jan. 1975 to Sept. 1988.
BIOCHEMICAL DATA: Jan. 1975 to Sept. 1988.
BIOLOGICAL DATA: Jan. 1975 to Sept. 1988.
RADIOCHEMICAL DATA: Jan. 1980, June 1981.
GAGE -
Water-stage recorder. Satellite telemetry at station.
Datum of gage: 494.298 ft NAVD88 based on a Level 2 Static GNSS survey processed through OPUS, Ref Frame NAD83 (2011)(EPOCH:2010.0000) ITRF2014 (EPOCH:2023.7831) and Geoid 18. The survey was completed on October 13th, 2023 while occupying a TRM referenced to local gage datum via differential levels.
Prior to 10/13/2023: the datum of the gage was established at 493.88 ft NGVD29, until Oct 1, 1982, where an additional 3.30 ft was added to the datum following a levels campaign.
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.
