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Water-Year Summary for Site 02335700

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00045 Precipitation(Sum)  
00045 Precipitation(Sum) [Operational]  
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
02335700 BIG CREEK NEAR ALPHARETTA, GA
LOCATION - Lat 34°03'02", long 84°16'10" referenced to North American Datum of 1983, Fulton County, GA, Hydrologic Unit 03130001, on right bank at downstream side of bridge on Kimball Bridge Road, 2.6 miles southeast of Alpharetta, and 9.4 miles upstream from mouth.
DRAINAGE AREA - 72 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD -
DISCHARGE : May 1960 to current year.
GAGE HEIGHT : October 1998 to current year.
GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 960.80 feet above North America Vertical Datum (NAVD) of 1988. (Determined via Level II GNSS survey)
COOPERATION - Southern Company.
REMARKS - Gage-height records are generally good. 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 recorded, 6,100 cfs, February 3, 1982; maximum gage-height recorded 13.05 feet, February 3, 1982; minimum daily discharge, 1.7 cfs, July 22, 1986.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - April 2002 to July 2010, September 2013 to October 2017.
INSTRUMENTATION - Tipping-bucket raingage.
WATER-QUALITY RECORDS
PERIOD OF RECORD - April 2016 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: April 2016 to current year.
REMARKS -
For period 04/28/2016-12/13/2018: Water temperature record is rated good.
EXTREMES FOR PERIOD OF DAILY RECORD -
WATER TEMPERATURE: Maximum recorded, 27.1°C, July 21, 26, 2016; minimum recorded, 0.6°C, January 5, 2018.