River SD

Johnson Lateral

South Dakota • 44.6819, -103.6683

Hydrography profile Updated Feb 1, 2026

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

11 mi

18 km

Elevation

2,989′ → 2,960′

29 ft drop

Stream Order

Medium River

Slope

0.05%

2.5 ft/mi

Drainage

4,243 mi²

10,990 km²

Avg Flow

-- cfs

1.1 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