USGS Water-Year Summary 2020
03479000 WATAUGA RIVER NEAR SUGAR GROVE, NC
LOCATION - Lat 36°14'21", long 81°49'20" referenced to North American Datum of 1983, Watauga County, NC, Hydrologic Unit 06010103, Lat 36014'21", long 81049'20", Watauga County, (Quad. Valle Crucis or 215 NE), 250 ft upstream from bridge on Secondary Road 1121, 300 ft downstream from Cove Creek, 2.3 miles southwest of Sugar Grove, and at mile 64.4.
DRAINAGE AREA - 92.1 mi². (measured from topographic maps, scale 1:24,000). The basin, in general, is open farm or grazing land, with the steep rocky slopes in forest cover, particularly in the upper portion. It is moderately populated. Average annual rainfall is 45- 50 inches.
- WDR NC-81-1: Drainage area.
PERIOD OF RECORD - October 1939 to current year. Monthly discharge only for some periods, published in WSP 1306.
GAGE - Water-stage recorder. Datum of gage is 2,607.84 ft above National Geodetic Vertical Datum of 1929. Satellite telemetry at streamgage.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of July 1916 reached a stage of 22.1 ft, from floodmarks on barn 0.25 mi upstream from station, as witnessed by local resident; discharge, 28,000 ft³/s, from rating curve extended above 4,900 ft³/s, on basis of slope-area measurement.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge from rating curve extended above 7,300 ft³/s on basis of slope-area measurement of peak flow, from profile based on floodmarks.
PERIOD OF RECORD - November 2016 to current year.
INSTRUMENTATION - Tipping-bucket raingage and electronic datalogger. Satellite telemetry at station.