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Water-Year Summary for Site USGS 07375230

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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.
  • 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.
Available Parameters
00065 Gage height(Mean)  

Water year 2020: 2019-10-01 to 2020-09-30

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USGS Water-Year Summary 2020
07375230 Tchefuncte River at Madisonville, LA
LOCATION - Lat 30°24'14", long 90°09'17" referenced to North American Datum of 1927, in sec.39, T.7 S., R.10 E., St. Tammany Parish, LA, Hydrologic Unit 08090201, on downstream East side of swing bridge for Hwy. 22.
DRAINAGE AREA - 410.42 mi².  
PERIOD OF RECORD - February 2004 to June 2008. February 2016 to current year.
GAGE - Water-stage recorder. Datum of gage is 0.00 ft. NAVD 88 (Geoid12B EPOCH 2010). Prior to February 2016 at assumed datum.
REMARKS - Water level affected by wind and tide at all stages.
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 10.32 ft; Aug. 29, 2005. (Not to current datum).
SPECIFIC CONDUCTANCE: February 2004 to June 2008.
SALINITY: February 2004 to June 2008.
WATER TEMPERATURE: February 2004 to June 2008.
PH: February 2004 to June 2008.
DISSOLVED OXYGEN: February 2004 to June 2008.
WATER TEMPERATURE: Maximum, 32.9°C, Aug. 15, 2007; minimum, 8.4°C, Jan, 22 and 23, 2008.
SPECIFIC CONDUCTANCE: Maximum, 14,000 microsiemens/cm, Apr. 29, 2006; minimum, 26 microsiemens/cm, June 27 and 28, 2004.
SALINITY: Maximum, 8.1 ppt, Apr. 29, 2006; minimum, 0 ppt, many days.
pH: Maximum, 10.0 standard units, Nov. 25, 2007; minimum, 5.4 standard units, April 14, 15, and 16, 2005.
DISSOLVED OXYGEN: Maximum, 12.6 mg/L, Jan. 1, 2005; minimum, 0.1 mg/L, August 8, 2007. Site is affected by wind and tides.