River SC

Polk Swamp

South Carolina • 33.1862, -80.6093

Hydrography profile Updated Dec 30, 2025

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

21 mi

33 km

Elevation

128′ → 43′

84 ft drop

Stream Order

Large River

Slope

0.08%

4.1 ft/mi

Drainage

157 mi²

407 km²

Avg Flow

-- cfs

1.4 mph velocity

Path to Mouth

93 mi

150 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

Data from EPA Water Quality Portal (USGS, EPA, state agencies).

Data from USGS & NOAA for informational purposes only. More

Water Level Gauges on Polk Swamp

There are 3 USGS water level monitoring stations on Polk Swamp providing real-time flow and stage data.