USGS Water-Year Summary for Site 07380260

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	Available Parameters
	00010 Temperature, water(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Mean)
	00300 Dissolved oxygen(Med.)
	00400 pH(Mean)
	32316 fChl, water, in situ(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

07380260 Empire Waterway S of Empire, LA

LOCATION - Lat 29°18'16.3", long 89°35'49.2" referenced to North American Datum of 1983, Plaquemines Parish, LA, Hydrologic Unit 08090301, located on top of 6ftx6ft platform in the Empire Waterway, approximately 4.88 miles south of the Empire Flood Gates.

SURFACE-WATER RECORDS

PERIOD OF RECORD - November 2017 to present

GAGE - Water level recoder consist of a non-contact water stage recorder housed in aluminum shelter approximately 15ft above water level. Datum of gage is 4.50ft below NAVD88 (GEOID12B) EPOCH 2010.0000.

COOPERATION - 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, 11.00 ft, Aug 29, 2021, Hurricane Ida. Minimum recorded gage height, 2.90 ft, Jan 17, 2018.

WATER-QUALITY RECORDS

PERIOD OF RECORD - November 2017 to present.

INSTRUMENTATION - Water quality multiprobe collecting water temperature, specific conductance, dissolved oxygen, pH, chlorophyll and turbidity.

REMARKS -

Turbidity and chlorophyll data heavily affected by oyster harvesting in the area. Turbidity data considered poor due to severe biofouling at the site location and extreme wind events causing significant turbulence.

Maximum recorded turbidity value estimated due to exceedance of quality control standard check.

EXTREMES FOR PERIOD OF RECORD - SPECIFIC CONDUCTANCE: Maximum recorded, 57,500 microsiemens/cm, Apr 15, 2019; minimum recorded, 635 microsiemens/cm, Jul 13, 2018. SALINITY: Maximum recorded, 38.0 ppt, Jul 6, 2019; minimum recorded, 0.3 ppt, on Jul 13, 2019. WATER TEMPERATURE: Maximum recorded, 34.4°C, Aug 11, 2020; minimum recorded, 3.2°C, Jan. 18, 2018. PH: Maximum recorded, 9.3 std units, Mar 27, 2020; minimum recorded, 6.8 std units, Feb 16, 2021. TURBIDITY: Maximum recorded, 1,560 FNU, Oct 28, 2020, estimated; minimum recorded, <1 FNU, Jun 18, 19, 20, 2020. DISSOLVED OXYGEN: Maximum recorded, 19.6 mg/L, Mar 24, 2019; minimum recorded, <0.3 mg/L, Aug 30, 2021.