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Watauga River near Sugar Grove, NC Flow & Water Level

North Carolina · USGS gauge 03479000 · live data

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About this gauge

USGS gauge 03479000 sits on the Watauga River and reads everything draining 92 square miles of the Watauga basin. Its datum sits 2,608 feet above sea level NAVD88. Daily flow has been on record here since 1940, 86 years of it.

Where this gauge sits in the drainage

No gauged site sits above this one on the mainstem, so this is the first published reading on the river. Downstream the next reading comes from Watauga River below Watauga Dam, Tenn at 468 square miles, so what passes this gauge is about 20% of the water measured there. Water passing here goes on to Watauga River below Wilbur Dam, TN and Watauga River at Elizabethton, TN.

Normal flows here

The Watauga River runs a median of 114 cfs at this gauge across 86 years of record. March is the fullest month at a median 204 cfs, and September the leanest at 58 cfs. The highest daily mean on record is 25,200 cfs in 2024, and the lowest is 8.1 cfs in 2002.

Median flow by month
MonthMedian flowShare of annual median
Jan152 cfs133%
Feb185 cfs162%
Mar204 cfs178%
Apr174 cfs152%
May136 cfs119%
Jun104 cfs91%
Jul79 cfs69%
Aug66 cfs58%
Sep58 cfs50%
Oct66 cfs58%
Nov84 cfs73%
Dec124 cfs108%

Medians from the USGS daily-statistics record, 1940 to 2026. A month at 100% is running at its own long-term median.

Flood stages and record crests

The Watauga River reaches flood stage at this gauge at 6 feet. NWS starts watching it at 5 feet. The highest crest on record is 29.6 feet, in August 1940.

NWS flood categories
CategoryGage height
Action5 ft
Minor flooding6 ft
Moderate flooding16 ft
Major flooding20 ft
Highest crests on record
WhenCrest
August 194029.6 ft
September 202429.6 ft
July 191622.1 ft
September 200421.9 ft
January 199520.5 ft

Flood categories and crest history from the NOAA National Water Prediction Service, gauge SGWN7. Stages are gage height, not depth. Not for navigation.

TVA dams near this gauge

TVA's Watauga Dam is 18 miles from this gauge on the Watauga system. Planned generation, lake level and tailwater elevation for it load below when TVA has published them.

Nearby river gauges

Live streamflow and gage height: USGS gauge 03479000. Percentile context computed against the gauge's period of record. Not for navigation.

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