USGS Water-Year Summary for Site 02218565

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00045 Precipitation(Sum)
	00060 Discharge(Mean)
	00065 Gage height(Max.,Min.,Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	63680 Turbidity, Form Neph(Max.,Min.,Med.)

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Water year 2025: 2025-10-01 to 2026-09-30

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USGS Water-Year Summary 2025

02218565 APALACHEE RIVER AT FENCE ROAD, NEAR DACULA, GA

LOCATION - Lat 34°00'37", long 83°53'39" referenced to North American Datum of 1983, Gwinnett County, GA, Hydrologic Unit 03070101, 3.0 miles north of Dacula, and 2.5 miles west of Auburn.

DRAINAGE AREA - 5.65 mi².

REVISIONS HISTORY - WDR GA-2013: 2012

SURFACE-WATER RECORDS

PERIOD OF RECORD -
DISCHARGE: Water Years 1994 to 2000 (annual maximum), July 2001 to current year.
GAGE-HEIGHT: Water Years 1994 to 2000 (annual maximum), July 2001 to current year.

GAGE - Satellite telemetry with a water-stage recorder and a continuous water-quality monitor. Datum of gage is 930.19 feet above North American Vertical Datum (NAVD) of 1988.

COOPERATION - Gwinnett County Department of Water Resources.

REMARKS - Gage-height records are generally fair. Discharge records are generally fair except for estimated discharges, which are poor. Additional details on the accuracy of the records can be obtained by contacting the USGS South Atlantic Water Science Center at gs-w-ga_nwisweb_data_inquiries@usgs.gov.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,190 cfs, September 21, 2009, by computation of peak flow through culvert; maximum gage-height recorded, 8.56 feet, September 21, 2009; minimum daily discharge, 0.28 cfs, August 13 and 14, 2002.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - August 2001 to current year.

INSTRUMENTATION - Tipping-bucket raingage.

WATER-QUALITY RECORDS

PERIOD OF RECORD - July 2001 to current year.

PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: July 2001 to current year.
WATER TEMPERATURE: July 2001 to current year.
TURBIDITY: July 2001 to current year.

INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor and an automatic refrigerated sampler.

REMARKS -
For period 10/01/2013-09/30/2014: Water temperature records rated good. Specific conductance records are good. Turbidity records are fair.
For period 10/01/2014-09/30/2015: Water temperature records rated good. Specific conductance records are good. Turbidity records are fair.
For period 10/01/2015-09/30/2016: Water temperature records rated good. Specific conductance records are good. Turbidity records are fair.
For period 10/01/2016-09/30/2017: Water temperature records rated good. Specific conductance records are fair. Turbidity records are fair.
For period 10/01/2017-09/30/2018: Water temperature records rated good. Specific conductance records are good. Turbidity records are fair.
For period 10/01/2017-09/30/2018: Water temperature records rated good. Specific conductance records are good. Turbidity records are fair.

Data for parameter code 63680 (turbidity) were collected using a probe with the following specifications: turbidity, water, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +/-2.5 degrees, FNU (Formazin Nephelometric Units). Prior to October 1, 2004, turbidity data were published using parameter code 00076: turbidity, water, unfiltered, NTU (Nephelometric Turbidity Units). Hydrologic event 9 indicates a routine sample while J designates a storm event sample. Laboratory chemical analyses are by RTI Laboratories, Livonia, MI. Laboratory sediment analyses are by the U.S. Geological Survey, Kentucky Sediment Laboratory. Field determinations of discharge, gage height, specific conductance, pH, water temperature, air temperature, turbidity, barometric pressure, and dissolved oxygen are by the U.S. Geological Survey.

EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum recorded, 406 microsiemens, August 4, 2006; minimum recorded, 18 microsiemens, February 22, 2003, July 1, 2003, April 5, 2022, July 29, 2022.

WATER TEMPERATURE: Maximum recorded, 27.1 °C, August 9, 2007, August 2-3, 2011; minimum recorded, -0.1 °C, January 5, 2018.

TURBIDITY: Maximum recorded, >2,200 FNU, several days; minimum recorded, 0.7 FNU, October 31, 2011, November 1, 2011, November 25, 2013.