River IA

West Branch One Hundred and Two River

Iowa • 40.8488, -94.7529

Hydrography profile Updated Dec 30, 2025

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

30 mi

48 km

Elevation

1,282′ → 1,053′

229 ft drop

Stream Order

Medium River

Slope

0.14%

7.6 ft/mi

Drainage

117 mi²

303 km²

Avg Flow

-- cfs

1.1 mph velocity

Path to Mouth

1,719 mi

2,766 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