USGS Water-Year Summary for Site USGS 07380330

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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)

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

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USGS Water-Year Summary 2021

07380330 Bayou Perot at Point Legard near Cutoff, LA

LOCATION - Lat 29°33'56.8", long 90°09'56.0" referenced to North American Datum of 1983, Lafourche Parish, LA, Hydrologic Unit 08090301, located on the south end of Bayou Perot on United States Army Corps of Engineers bank stabilization wall, approximately 10.5miles ENE of Cutoff, LA.

DRAINAGE AREA - Indeterminate.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Nov. 2009 to current year.

GAGE - Non-contact water stage recorder. Datum of gage is 1.032ft below NAVD88, GEOID12B, EPOCH 2010.0000.

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

REMARKS - Site affected by wind and tide. Satellite telemetry at station.

EXTREMES FOR PERIOD OF RECORD - Maximum recorded gage height, 8.88 ft, Aug. 29, 2012; minimum recorded gage height, -0.07 ft, Jan. 17, 2018.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Nov. 2009 to current year.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Nov. 2009 to current year. SALINITY: Nov. 2009 to current year. WATER TEMPERATURE: Nov. 2009 to current year. TURBIDITY: Jun. 2016 to current year. DISSOLVED OXYGEN: Jun. 2016 to current year. pH: Jun. 2016 to current year. CHLOROPHYLL-A: Jun. 2016 to current year.

INSTRUMENTATION - Water-quality monitor recording specific conductance, water temperature, pH, chlorophyll A, turbidity, and dissolved oxygen.

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 FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum, 43,700 microsiemens/cm, Aug. 29, 2012; minimum, 138 microsiemens/cm, Jan 17, 2018.
SALINITY: Maximum, 28.2 ppt, Aug. 29, 2012; minimum, 0.1 ppt, on many days.
WATER TEMPERATURE: Maximum, 35.5°C, Jul. 9, 2011; minimum, 1.2°C, Jan. 18, 2018.
PH: Maximum, 8.8 std. units, Jul. 2, 2017; minimum, 6.7 std. units, on Jun. 30, 2016 and Sep 26, 2017.
DISSOLVED OXYGEN: Maximum, 13.9 mg/L, Jan. 18, 2018; minimum, 1.7 mg/L, Oct. 15, 2018.
TURBIDITY: Maximum, 252 FNU, Nov. 19, 2017; Minimum, 1.1 FNU, Aug 21, 2018.