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Eighteenmile Creek below Pendleton, SC Water Level Today

South Carolina · USGS gauge 02186702 · live data · Updated Oct 28, 2026

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About this gauge

USGS gauge 02186702 sits on Eighteenmile Creek and reads everything draining 49 square miles of the Seneca basin. Its datum sits 676 feet above sea level NAVD88. Daily flow has been on record here since 2013, 13 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 Hartwell Lake near Hartwell, GA at 2,088 square miles, so what passes this gauge is about 2% of the water measured there.

Normal flows here

Eighteenmile Creek runs a median of 49 cfs at this gauge across 13 years of record. January is the fullest month at a median 77 cfs, and September the leanest at 28 cfs. The highest daily mean on record is 2,170 cfs in 2024, and the lowest is 8.8 cfs in 2024.

Median flow by month
MonthMedian flowShare of annual median
Jan77 cfs157%
Feb76 cfs155%
Mar74 cfs151%
Apr69 cfs141%
May56 cfs114%
Jun44 cfs89%
Jul36 cfs73%
Aug36 cfs73%
Sep28 cfs57%
Oct30 cfs61%
Nov36 cfs74%
Dec61 cfs124%

Medians from the USGS daily-statistics record, 2013 to 2026. A month at 100% is running at its own long-term median.

Flood stages and record crests

Eighteenmile Creek reaches flood stage at this gauge at 12 feet. NWS starts watching it at 11 feet. The highest crest on record is 15 feet, in July 2013.

NWS flood categories
CategoryGage height
Action11 ft
Minor flooding12 ft
Moderate flooding16.5 ft
Major flooding18.5 ft
Highest crests on record
WhenCrest
July 201315 ft
September 202412.9 ft
February 202012.3 ft
January 201311.4 ft
December 201511.3 ft

Flood categories and crest history from the NOAA National Water Prediction Service, gauge EMCS1. Stages are gage height, not depth. Not for navigation.

Nearby river gauges

Live streamflow and gage height: USGS gauge 02186702. Percentile context computed against the gauge's period of record. Not for navigation.

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