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- 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.
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USGS Water-Year Summary 2024
02177000 CHATTOOGA RIVER NEAR CLAYTON, GA
LOCATION - Lat 34°48'49.6", long 83°18'22.9" referenced to North American Datum of 1983, Oconee County, SC, Hydrologic Unit 03060102, on the left bank 150 feet downstream from bridge on US 76, 2.8 miles upstream from Stekoa Creek, 9.0 miles downstream from confluence with Warwoman Creek, 9.0 miles upstream from confluence with Tallulah River, and 7.0 miles southeast of Clayton.
DRAINAGE AREA - 207 mi².
REVISIONS HISTORY - WSP 1383: 1940-41, Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
DISCHARGE: May 1907 to June 1908; 1915, 1917-1929 (annual maximum discharge only); October 1939 to current year. Monthly discharge only for May 1907 to June 1908, published in WSP 1303.
GAGE HEIGHT: October 1999 to current year.
DISCHARGE: May 1907 to June 1908; 1915, 1917-1929 (annual maximum discharge only); October 1939 to current year. Monthly discharge only for May 1907 to June 1908, published in WSP 1303.
GAGE HEIGHT: October 1999 to current year.
GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 1,165.50 feet above North American Vertical Datum (NAVD88). May 1907 to June 1908, a non-recording gage was located at site 400 feet upstream at different datum.
COOPERATION - Georgia Department of Natural Resources, Environmental Protection Division.
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.
Periods of monthly discharge only are not included in statistics computations.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 34,300 cfs, September 27, 2024; maximum gage height recorded, 13.80 feet, August 30, 1940; minimum daily discharge, 67 cfs, August 22-24, 2008.
WATER-QUALITY RECORDS
PERIOD OF RECORD - June 1941, September 1957 to June 1958, August 1962 to February 1994, November 1994 through December 2024 (discontinued).
COOPERATION - Georgia Department of Natural Resources, Environmental Protection Division.
REMARKS - Analyzing agency is represented by the five-digit code listed under USGS Water Science Center special parameter code 99920. Laboratory analyses with analyzing agency code 81341 are by the Laboratory Services Section, Environmental Protection Division, Georgia Department of Natural Resources. Field determinations of Discharge, Specific Conductance, pH, Water Temperature, Air Temperature, and Dissolved Oxygen are by the U.S. Geological Survey.
