USGS Water-Year Summary for Site 02330450

Click to hide Water-Year Summary instructions and information

Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
Not all sites have reports available for every water year.

	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00045 Precipitation(Sum)
	00060 Discharge(Mean)
	00065 Gage height(Max.,Min.,Mean)

Select a water year

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

Print this page

USGS Water-Year Summary 2023

02330450 CHATTAHOOCHEE RIVER AT HELEN, GA

LOCATION - Lat 34°42'03.5", long 83°43'45.3" referenced to North American Datum of 1983, White County, GA, Hydrologic Unit 03130001, on downstream side of bridge on GA 17 and 75 at Helen, and 1.1 miles downstream from Smith Creek.

DRAINAGE AREA - 44.7 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD -
DISCHARGE: Miscellaneous low-flow measurements in water years 1953 and 1955. May 1981 to current year.
GAGE HEIGHT: October 1998 to current year.

GAGE - Satellite telemetry with a water-stage recorder and continuous water-temperature thermistor. Datum of gage is 1,404.04 feet above National Geodetic Vertical Datum (NGVD) of 1929.

COOPERATION - U.S. Army Corps of Engineers, Mobile District.

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 OUTSIDE PERIOD OF RECORD - Flood of August 23, 1967, reached a discharge of 11,000 cfs from contracted-opening computation at highway bridge 2.0 miles downstream at a drainage area of 48.2 mi².

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 5,260 cfs, September 16, 2004; maximum gage height recorded, 7.14 feet, August 17, 2021; minimum daily discharge, 20 cfs, October 6, 1986, October 2, 15, 2007, and September 29, 30, 2016.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - April 2003 to current year.

INSTRUMENTATION - Tipping-bucket raingage.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -
WATER TEMPERATURE: July 2003 to current year.

INSTRUMENTATION - Satellite telemetry with a continuous water temperature thermistor.

REMARKS -
For period 10/01/2013-02/28/2018: Water temperature records good.

EXTREMES FOR PERIOD OF DAILY RECORD -
WATER TEMPERATURE: Maximum recorded, 32.6°C, August 21, 2007; minimum recorded, -0.2°C, February 20, 2015.