USGS Water-Year Summary for Site 02198500

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	Available Parameters
	00060 Discharge(Max.,Min.,Mean)
	00065 Gage height(Max.,Min.,Mean)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

02198500 SAVANNAH RIVER NEAR CLYO, GA

LOCATION - Lat 32°31'42.8", long 81°16'06" referenced to North American Datum of 1983, Effingham County, GA, Hydrologic Unit 03060109, at Georgia-South Carolina State line, on downstream side of State Highway 119 bridge, 3.0 mi north of Clyo, and at river mile 61.4.

DRAINAGE AREA - 9,850 mi².

REVISIONS HISTORY - WSP 1112: 1940.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1929 to September 1933, October 1937 to current year. Gage-height records collected at same site 1921-43 by National Weather Service (unpublished prior to 1933).

GAGE - Data collection platform. Datum of gage is 12.73 ft above NAVD of 1988. Prior to July 26, 2000, at site 2,100 ft downstream at same datum. Prior to Jan. 31, 1933, nonrecording gage at same site and at datum 4.00 ft higher. Jan. 31, 1933, to June 12, 1945, nonrecording gage at same site and datum.

COOPERATION -

STREAMFLOW: Beaufort-Jasper Water and Sewer Authority.

WATER-QUALITY: 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-sc_nwisweb_data_inquiries@usgs.gov.

EXTREMES FOR PERIOD OF RECORD - Highest daily mean discharge for period of record is an estimated value. Maximum peak flow for the period of record is from rating curve extended linearly above 120,000 cfs. Maximum instantaneous discharge, 270,000 cfs, Oct 6, 1929. Maximum instantaneous gage height, 29.70 ft, Oct 6, 1929. Minimum daily mean discharge, 1,950 cfs, Sep 27, 1931.

WATER-QUALITY RECORDS

PERIOD OF RECORD - November 1938 to September 1939, October 1957 to September 1958, October 1962 to May 1963, October 1964 to December 1972, September 1975, May 1976, March 1977, July 1980, October 1982 to February 1994, December 1994 to current year.

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: January 1974 to July 1977.

WATER TEMPERATURE: May 1938 to April 1939, January 1974 to July 1977.

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.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum daily, 110 microsiemens June 14, 1977; minimum daily, 42 microsiemens July 5, 1974.

WATER TEMPERATURE: Maximum daily, 27.0°C August 23, 1975, July 9, 13, 1977; minimum daily recorded 4.0°C January 22, 23, 24, 26, 30, and February 1, 1977.