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Water-Year Summary for Site 08374550

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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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Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Max.,Min.,Mean)  
00065 Gage height(Max.,Min.,Mean)  
00095 Specific cond at 25C(Max.,Min.,Mean)  
00300 Dissolved oxygen(Max.,Min.,Mean)  
00400 pH(Max.,Min.)  

Water year 2024: 2024-10-01 to 2025-09-30
 
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USGS Water-Year Summary 2024
08374550 Rio Grande near Castolon, TX
LOCATION - Lat 29°08'16", long 103°31'28" referenced to North American Datum of 1927, Brewster County, TX, Hydrologic Unit 13040205, on the left bank, 660 feet south of Santa Elena Canyon Road, 0.75 miles west of the Castolon Ranger Station and General Store; 0.36 miles downstream of the confluence of Blue Creek in Big Bend National Park, TX.
DRAINAGE AREA - Not determined.
REVISIONS HISTORY - Discharge for the period of April 29, 2020 to June 23, 2020 was revised on November 5, 2020 based on changes to the stage-discharge rating. 
SURFACE-WATER RECORDS
PERIOD OF RECORD - Aug. 2007 to current year.
GAGE - Water-stage recorder. Datum of Gage is 2,109.60ft above NAVD88 as determined by GNSS survey. Satellite telemeter at station. Prior to September 2008, the gage was located about 200 feet downstream.
COOPERATION - Texas Commission on Environmental Quality (TCEQ)
REMARKS - Since installation of gage in Aug. 2007, at least 10% of contributing drainage area has been regulated.
WATER-QUALITY RECORDS
PERIOD OF RECORD -

CHEMICAL DATA: Feb. 2006.

BIOCHEMICAL DATA: Feb. 2006.

RADIOCHEMICAL DATA: Feb. 2006.

PERIOD OF DAILY RECORD -

WATER TEMPERATURE: Sept. 2011 to June 2014.

SPECIFIC CONDUCTANCE: Sept. 2011 to June 2014.

pH: Sept. 2011 to June 2014.

DISSOLVED OXYGEN: Sept. 2011 to June 2014.