USGS Water-Year Summary for Site 02385800

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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(Max.,Min.,Mean)

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

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USGS Water-Year Summary 2023

02385800 HOLLY CREEK NEAR CHATSWORTH, GA

LOCATION - Lat 34°43'00.3", long 84°46'12.9" referenced to North American Datum of 1983, Murray County, GA, Hydrologic Unit 03150101, on right bank at bridge on Smyrna-Ramhurst Road, 3.0 miles upstream from Rock Creek, and 3.3 miles south of Chatsworth.

DRAINAGE AREA - 64 mi².

REVISIONS HISTORY -

WDR GA-80-1: Drainage area.

Gage datum was revised on February 16, 2022 based on an error in the determination of the gage datum.

SURFACE-WATER RECORDS

PERIOD OF RECORD -
DISCHARGE: June 1960 to current year.
GAGE HEIGHT: October 1998 to current year.

GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 689.02 feet above North American Vertical Datum (NAVD) of 1988.

COOPERATION - Georgia Department of Natural Resources, Environmental Protection Division.

REMARKS - Gage-height records are generally good. Discharge records are generally good 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.

Low flow affected by withdrawals and return flow by the City of Chatsworth.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 20,600 cfs, from rating curve extended above 11,000 cfs on basis of contracted-opening measurement of peak flow, February 16, 1990; maximum gage-height recorded, 14.87 feet, February 16, 1990; minimum daily discharge, 0.40 cfs, September 19, 2000.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - March 2002 to October 2017.

INSTRUMENTATION - Tipping-bucket raingage.

WATER-QUALITY RECORDS

PERIOD OF RECORD - July 1960 to August 1975, March 1977 to September 1984.

PERIOD OF DAILY RECORD - WATER TEMPERATURE: January 2005 to current year.

INSTRUMENTATION - Satellite telemetry with a continuous water temperature thermistor.

REMARKS -
For period 10/01/2015 - 01/12/2021: Water temperature record good.

EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum recorded, 31.2°C, July 26, 2016; minimum recorded, 0.8°C, January 24, 2005.