USGS Water-Year Summary for Site 292800090060000

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	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)

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Water year 2024: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2024

292800090060000 Little Lake near Bay Dosgris E of Galliano, LA

LOCATION - Lat 29°28'00", long 90°06'00" referenced to North American Datum of 1983, Jefferson Parish, LA, Hydrologic Unit 08090301, located on wooden platform, east of Galliano, LA.

DRAINAGE AREA - Indeterminate; site is located in a coastal bay.

SURFACE-WATER RECORDS

PERIOD OF RECORD - August 2001 to current year.

GAGE - Water-stage recorder. Datum of gage is 4.38ft below NAVD 88, GEOID18; prior to June 16, 2009 datum of gage 4.37ft below NAVD 88.

REMARKS -

Stage affected by wind and tide. Satellite telemetry at station. Data for period Aug. 24, 2001 to Sept. 30, 2001 available at the USGS Louisiana Water Science Center, Baton Rouge.

Extremes to period of record may have been exceeded during periods of missing data due to site destruction by Hurricane Ida, 2021.

EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 9.76 ft, Aug. 29, 2012; minimum gage height, 2.44 ft, Dec. 25, 2020.

WATER-QUALITY RECORDS

PERIOD OF RECORD - SPECIFIC CONDUCTANCE: August 2001 to current year. WATER TEMPERATURE: August 2001 to current year. pH: June 2016 to current year. DISSOLVED OXYGEN: June 2016 to current year. TURBIDITY: June 2016 to current year. CHLOROPHYLL-A (ESTIMATED CONC.): June 2016 to current year.

COOPERATION -

Louisiana Department of Wildlife and Fisheries and Louisiana Coastal Protection and Restoration Authority.

INSTRUMENTATION - Water-quality, multi-parameter sonde recording specific conductance, water temperature, dissolved oxygen, pH, turbidity, and chlorophyll-a concentration

REMARKS -

Turbidity data considered poor due to severe biofouling at the site location and extreme wind events causing significant turbulence.

Turbidity data that were previously reported in NTU were updated in October 2019 to reflect proper reporting units of FNU.

Extremes to period of record may have been exceeded during periods of missing data due to site destruction by Hurricane Ida, 2021.

EXTREMES FOR PERIOD OF RECORD -
SPECIFIC CONDUCTANCE: Maximum, 48,500 microsiemens/cm, Aug 29, 2012; minimum, 126 microsiemens/cm, Apr 25, 2020.
SALINITY: Maximum, 31.6 ppt, Aug. 29, 2012; Minimum, 0.1 ppt, on many days.
WATER TEMPERATURE: Maximum, 35.3°C, Aug. 4, 2011; minimum, 2.0°C, Jan 10, 2010.
PH: Maximum, 9.1 std. units, Mar 26, 2019 and Sep 8, 2022; minimum, 6.6 std. units, Sep 28-29, 2016.
TURBIDITY: Maximum, 393 FNU, Feb 17, 2021; minimum, <1 FNU, Nov 6, 2020 and Dec 1-2, 2022.
DISSOLVED OXYGEN: Maximum, 15.4 mg/L, Jan 11, 2018; minimum, 1.5 mg/L, Sept 4, 2020