USGS Water-Year Summary 2022
LOCATION - Lat 29°32'29", long 91°23'08" referenced to North American Datum of 1983, St. Mary Parish, LA, Hydrologic Unit 08080101, Approximately 1400 feet north of the intersection of Little Doctors Bayou and Big Lacassine Bayou near Belle Isle in St. Mary Parish, LA.
DRAINAGE AREA - Indeterminate.
PERIOD OF RECORD - May 2009 to the current year.
GAGE - Water-stage recorder. Datum of gage is 0 ft NAVD88 Geoid12b from Jul. 25, 2019 to present. Datum of gage was 1.11 feet below NAVD88 Geoid12a between Oct. 1, 2013 to Jul. 13, 2019.
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 5.58 ft, Jun. 22, 2017; minimum gage height, -1.02 ft, Aug. 29, 2012. Note: Extremes to period of record may have been exceeded during periods of missing data due to site destruction caused by Tropical Storm Lee 2011; Tropical Storm Isaac 2012; Hurricane Patricia 2015; Hurricane Barry 2019; Hurricane Laura, Delta, and Zeta 2020.
PERIOD OF RECORD - May 2009 to current year
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: May 2009 to current year.
SALINITY: May 2009 to current year.
WATER TEMPERATURE: May 2009 to current year.
INSTRUMENTATION - Water quality monitor recording specific conductance and water temperature.
EXTREMES FOR PERIOD OF RECORD - SPECIFIC CONDUCTANCE: Maximum, 11,400 microsiemens/cm, Aug. 30, 2012; minimum, 148 microsiemens/cm, Oct. 30, Nov. 1, 2009.
SALINITY: Maximum: 6.5 ppt, Aug. 30, 2012; minimum, 0.1 ppt, on many days.
WATER TEMPERATURE: Maximum, 34.0°C, Aug. 18, 2011; minimum, 3.2°C, Jan. 30, 2014.