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Water-Year Summary for Site 02336030

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

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

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USGS Water-Year Summary 2021
02336030 NORTH FORK PEACHTREE CREEK AT GRAVES ROAD, NEAR DORAVILLE, GA
LOCATION - Lat 33°54'21", long 84°13'30" referenced to North American Datum of 1983, Gwinnett County, GA, Hydrologic Unit 03130001, at bridge at Graves Road, 0.3 miles east of Interstate 85.
DRAINAGE AREA - 1.53 mi². revised.
REVISIONS HISTORY - WDR GA-2013: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - DISCHARGE: June 2001 to current year. GAGE-HEIGHT: June 2001 to current year.
GAGE - Satellite telemetry with a water-stage recorder and a continuous water-quality monitor. Datum of gage is 950 feet above National Geodetic Vertical Datum (NGVD) of 1929 (from topographic map). Prior to December 2006, gage located 75 feet downstream at same datum.
COOPERATION - Gwinnett County Department of Water Resources.
REMARKS -
For period 10/01/2013-12/11/2017: Discharge record poor. Gage-height record good.
For period 12/12/2017-04/03/2019: Discharge record poor. Gage-height record fair.
For period 04/04/2019-12/11/2019: Discharge record poor. Gage-height record fair.
For period 12/12/2019-11/10/2020: Discharge record poor. Gage-height record fair.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,840 cfs, on basis of slope-area measurement of peak flow; September 21, 2009; maximum gage-height recorded 12.93 feet, September 21, 2009; minimum daily discharge, 0.05 cfs, estimated, August 23 and September 7, 2008.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - June 2001 to September 2007. November 2008 to current year.
INSTRUMENTATION - Tipping-bucket raingage.
WATER-QUALITY RECORDS
PERIOD OF RECORD - August 1976, June 2001 to current year.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: June 2001 to current year.
WATER TEMPERATURE: June 2001 to current year.
TURBIDITY: June 2001 to current year.
INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor and an refrigerated automatic sampler.
REMARKS -
For period 10/01/2014-09/30/2015: Specific conductance and water temperature records are rated good, Turbidity records are rated fair.
For period 10/01/2015-09/30/2016: Specific conductance and water temperature records are rated good, Turbidity records are rated poor.
For period 10/01/2016-09/30/2017: Specific conductance and water temperature records are rated good, Turbidity records are rated poor.
For period 10/01/2017-09/30/2018: Specific conductance and water temperature records are rated good, Turbidity records are rated poor.
For period 10/01/2018-09/30/2019: Specific conductance and water temperature records are rated good, Turbidity records are rated poor.

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 code of 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 RECORD -

SPECIFIC CONDUCTANCE: Maximum recorded, 1,590 microsiemens, January 6, 2017; minimum recorded, 5 microsiemens, July 12, 2019.

WATER TEMPERATURE: Maximum recorded, 30.8°C, August 5, 2008; minimum recorded, 1.2°C, January 24, 2003.

TURBIDITY: Maximum recorded, >2,200 FNU on several days; minimum recorded, < 0.5 FNU, June 18,19 and 22, 2020.