USGS Water-Year Summary 2023
07381349 Caillou Lake (Sister Lake) SW of Dulac, LA
LOCATION - Lat 29°14'57", long 90°55'16" referenced to North American Datum of 1983, Terrebonne Parish, LA, Hydrologic Unit 08090302, On a 30ft platform 9.0 mi. southwest of Bayou Du Large and 13 mi. southwest of Dulac, Louisiana.
DRAINAGE AREA - Indeterminate.
PERIOD OF RECORD - July 1992 to current year.
GAGE - Water-stage recorder. Datum of gage is 1.03ft below NAVD88 GEOID18.
EXTREMES FOR PERIOD OF RECORD - Maximum recorded gage height, 8.87 ft, Jul 13, 2019; minimum recorded gage height, -3.14 ft, Aug 30, 2012.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: July 1992 to current.
SALINITY: October 2002 to current.
WATER TEMPERATURES: July 1992 to current.
INSTRUMENTATION - Water-quality monitor recording specific conductance, water temperature.
EXTREMES FOR PERIOD OF RECORD - SPECIFIC CONDUCTANCE: Maximum recorded, 48,100 microsiemens/cm, Nov 8, 2000 and Dec 15, 2014; minimum recorded, 424 microsiemens/cm, Mar. 25,2019.
SALINITY: Maximum recorded, 31.4 ppt, Dec 15, 2014; minimum recorded, 0.2 ppt on several days.
WATER TEMPERATURES: Maximum recorded, 35.0°C, Jul 20, 2023, but may have been higher during period of missing record; minimum recorded, 0.9°C, Feb. 5, 1996.