River NH

West Branch Upper Ammonoosuc River

New Hampshire • 44.4988, -71.3518

Hydrography profile Updated Jan 19, 2026

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

6 mi

10 km

Elevation

2,670′ → 1,284′

1,385 ft drop

Stream Order

Medium River

Slope

4.33%

229.0 ft/mi

Drainage

16 mi²

40 km²

Avg Flow

35 cfs

0.9 mph velocity

Path to Mouth

380 mi

612 km to ocean

Classification

Headwater

Source Stream

Elevation Profile

Water Quality

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

Data from USGS & NOAA for informational purposes only. More