USGS Water-Year Summary for Site 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 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

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 - Water stage recorder. Datum of gage is 1.67ft below NAVD88, GEOID18.

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 to period of record may have been exceeded during period of missing record caused by Hurricane Ida, 2021.

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 to period of record may have been exceeded during period of missing record caused by Hurricane Ida, 2021.

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum, 43,700 microsiemens/cm, Aug. 29, 2012; minimum, 109 microsiemens/cm, June. 02, 2020.
SALINITY: Maximum, 28.2 ppt, Aug. 29, 2012; minimum, 0.1 ppt, on many days.
WATER TEMPERATURE: Maximum, 36.5 on June. 30 2024; minimum, 1.2°C, Jan. 18, 2018.
PH: Maximum, 9.3 std. units, on several days; minimum, 6.5 std. units, on Sept. 30, 2020 and Sep 26, 2017.
DISSOLVED OXYGEN: Maximum, 14.1 mg/L, Jan. 24, 2022; minimum, <0.3 mg/L, Jul 24, 2023.
TURBIDITY: Maximum, 348 FNU, Oct, 28, 2020; Minimum, <1 FNU, Sep. 4, 2020.