USGS Water-Year Summary 2024

02181580 TALLULAH RIVER ABOVE POWERHOUSE, NEAR TALLULAH FALLS, GA

LOCATION - Lat 34°43'54.9", long 83°22'31.5" referenced to North American Datum of 1983, Rabun County, GA, Hydrologic Unit 03060102, on right bank 200 feet upstream from the Tallulah Falls Powerhouse in the Tallulah Gorge, 1.2 miles downstream from Cascade Falls, 1.7 miles downstream from Tallulah Falls Lake, and 0.5 miles northeast of Tallulah Lodge.

DRAINAGE AREA - 184.4 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD -
DISCHARGE: November 1997 to current year.
GAGE HEIGHT: November 1997 to current year.

GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 940 feet above National Geodetic Vertical Datum (NGVD) of 1929 (from topographic map).

COOPERATION - Georgia Power Corporation.

REMARKS - Gage-height records are generally good to fair. 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.

Streamflow regulated by Tallulah Falls Dam.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 21,000 cfs, from rating curve extended above 900 cfs on basis of broad-crested weir computation, September 17, 2004; maximum gage height recorded, 14.91 feet, from floodmarks, September 17, 2004; minimum daily discharge, 0.94 cfs, October 23, 2023.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - January 2001 to September 2017.

INSTRUMENTATION - Tipping-bucket raingage.