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USGS Water-Year Summary 2024
03566000 HIWASSEE RIVER AT CHARLESTON, TN
LOCATION - Lat 35°17'42.27", long 84°45'36.05" referenced to North American Datum of 1927, Bradley County, TN, Hydrologic Unit 06020002, on left bank 250 ft upstream from Norfolk Southern Railway bridge until April 9, 1996, at Norfolk Southern Railway bridge until Nov. 10, 1998, on right bank at barge facility thereafter, 0.3 mi downstream from bridge on U.S. Highway 11 at Charleston, and at mile 18.2.
DRAINAGE AREA - 2,298 mi².
REVISIONS HISTORY - WSP 853: Drainage area. WSP 1436: 1902, 1922(M), 1928, 1936(M).
SURFACE-WATER RECORDS
PERIOD OF RECORD - November 1898 to April 1899, November 1899 to April 1903, October 1919 to January 1940, January 1963 to January 1977, September 1979 to December 1981, August 1987 to June 5, 2018 (discontinued). Gage-height records collected at this station during the period December 1884 to December 1889 are contained in the United States War Department Stages of Ohio River and Principal Tributaries, 1858-89, Part 1, and during period January 1890 to December 1943 in reports of the U.S. Weather Bureau.
GAGE - Data collection platform and acoustic velocity meter. Datum of gage is 665.419 ft. NAVD 88. Prior to July 18, 1925, non- recording gages, and July 18, 1925 to September 6, 1926, water-stage recorder, at present site, at datum 1.50 ft higher. September 1926 to January 1940, January 1963 to January 1977, September 1979 to December 1981, August 1987 to April 1996, on left bank 250 ft upstream of present site, at same datum.
REMARKS - Records fair except for periods prior to 08/24/2017 which should be considered poor and other periods as noted. Some diversions above gage for industrial and municipal water supplies. Flow regulated by seven reservoirs.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Mar. 31, 1886, reached a stage of 34.0 ft, present datum, discharge about 70,000 ft³/s.
