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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.
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Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2024: 2024-10-01 to 2025-09-30
 
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USGS Water-Year Summary 2024
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.  
SURFACE-WATER RECORDS
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 datum of gage 3.644 ft. below NAVD88 Geoid12B EPOCH 2010).
REMARKS - Water level affected by wind and tide at all stages.
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 8.55 ft; Aug. 29, 2021 (Hurricane Ida) but could have been higher during Hurricane Katrina when gage was overtopped.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD -
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.
EXTREMES FOR PERIOD OF RECORD -
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.