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Hyco River below Abay D near Mcgehees Mill, NC Flow & Water Level

North Carolina · USGS gauge 02077303 · live data

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About this gauge

USGS gauge 02077303 sits on the Hyco River and reads everything draining 202 square miles of the Lower Dan basin. Its datum sits 342 feet above sea level NAVD88. Daily flow has been on record here since 1974, 52 years of it.

Where this gauge sits in the drainage

Afterbay Reservoir at Dam near Mcgehees Mill, NC sits immediately upstream, so dam releases rather than rainfall set the flow here. Three gauged sites sit upstream of here. The closest is Roxboro Stm-Elctrc Generating Plnt Afterbay Reservoir, reading 196 square miles. This gauge adds the 6.0 square miles that drain in between.

Normal flows here

The Hyco River runs a median of 18 cfs at this gauge across 52 years of record. March is the fullest month at a median 123 cfs, and November the leanest at 14 cfs. The highest daily mean on record is 16,100 cfs in 2025, and the lowest is 0.3 cfs in 2011.

Median flow by month
MonthMedian flowShare of annual median
Jan91 cfs506%
Feb101 cfs561%
Mar123 cfs683%
Apr90 cfs503%
May22 cfs122%
Jun18 cfs100%
Jul16 cfs89%
Aug16 cfs89%
Sep16 cfs89%
Oct16 cfs89%
Nov14 cfs78%
Dec22 cfs122%

Medians from the USGS daily-statistics record, 1974 to 2026. A month at 100% is running at its own long-term median.

Nearby river gauges

Live streamflow and gage height: USGS gauge 02077303. Percentile context computed against the gauge's period of record. Not for navigation.

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