Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our Next Generation Station Page here.
Click to hideNews Bulletins

Water-Year Summary for Site USGS 07374526

Click to hide Water-Year Summary instructions and information
  • 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
00010 Temperature, water(Max.,Min.,Mean)  
00065 Gage height(Max.,Min.,Mean)  
00095 Specific cond at 25C(Max.,Min.,Mean)  
00480 Salinity(Max.,Min.,Mean)  

Water year 2021: 2021-10-01 to 2022-09-30

Print this page
USGS Water-Year Summary 2021
07374526 Black Bay nr Snake Island nr Point-A-LA-Hache, LA
LOCATION - Lat 29°38'00", long 89°33'49" referenced to North American Datum of 1927, Plaquemines Parish, LA, Hydrologic Unit 08090203, on a three-pile platform 13 miles northeast of Pointe-A-La-Hache.
DRAINAGE AREA - Not applicable. Site is located in open water.
PERIOD OF RECORD - March 1992 to current year.
REVISED RECORDS - Period of record minimum revised to reflect the datum used prior to October 1, 1995.
GAGE - Water-stage recorder. Datum of gage is assumed. Prior to Sep 19, 2012, datum of gage was 0.70 ft below NAVD 88. Prior to Sep 18, 2001, datum of gage was NGVD 1929. Prior to Oct 1, 1995, datum of gage was 8.45 ft below NGVD 1929.
REMARKS - Site affected by wind and tide. Satellite telemetry at station.
EXTREMES FOR PERIOD OF RECORD - Maximum recorded gage height, 12.83 ft, Sept. 1, 2008, but may have been higher during period of missing record due to Hurricanes Gustav and Isaac; minimum recorded gage height, -3.01 ft, Mar 13, 1993.
PERIOD OF RECORD - March 1992 to current year.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: March 1992 to current year. SALINITY: October 2002 to current year. WATER TEMPERATURE: June 1992 to current year.
INSTRUMENTATION - Water-quality monitor recording specific conductance and water temperature.
EXTREMES FOR PERIOD OF RECORD - SPECIFIC CONDUCTANCE: Maximum recorded, 48,600 microsiemens/cm, Aug. 28, 2012, but may have been higher during period of missing record due to Hurricane Isaac; minimum record, 291 microsiemens, Mar. 3, 1994. SALINITY: Maximum record, 31.8 ppt, Aug. 28, 2012; minimum record, 0.1 ppt, Dec. 12, 2010. WATER TEMPERATURE: Maximum record, 35.2°C, Aug 23, 2011; minimum record, 2.1°C, Jan. 18, 1997.