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Water-Year Summary for Site 08158827

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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(Min.,Max.,Mean)  
00065 Gage height(Max.,Mean,Min.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
08158827 Onion Creek at Twin Creeks Road near Manchaca, TX
LOCATION - Lat 30°07'34", long 97°49'15" referenced to North American Datum of 1927, Travis County, TX, Hydrologic Unit 12090205, on upstream left side of bridge over Onion Creek at intersection of Twin Creeks Road and Arroyo Doble Road, approximately 3 miles south-southeast of Manchaca.
DRAINAGE AREA - 181 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Apr. 2003 to Jan. 2004, June 2004 to current year. PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: Oct. 2004 to May 2005. BIOCHEMICAL DATA: Oct. 2004 to May 2005. PESTICIDE DATA: Oct. 2004 to May 2005. SEDIMENT DATA: Oct. 2004.
GAGE -

Water-stage recorder. Satellite telemetry at station.

Datum of the Gage: 584.16 ft NAVD88 based on a Level 2 Static GNSS survey processed through OPUS; Ref Frame NAD83 (2011) (EPOCH:2010.0000)  ITRF2014 (EPOCH:2022.3253) and Geoid 18.  The survey was completed on 4/29/2022 while occupying a TRM referenced to local datum via differential levels. 

Prior to 4/29/2022 the datum of the gage was 587.8 ft NAVD88.

REMARKS - 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.