River SD

Iowa Ditch

South Dakota • 44.0728, -103.1626

Hydrography profile Updated Feb 1, 2026

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

6 mi

10 km

Elevation

3,212′ → 3,170′

42 ft drop

Stream Order

Large River

Slope

0.13%

6.7 ft/mi

Drainage

419 mi²

1,085 km²

Avg Flow

-- cfs

1.4 mph velocity

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