Hazard Warning: Hazard information may be user-submitted and unverified. Conditions change frequently. Always scout rapids and obstacles yourself.

Rapid NH Class IV

Alderbrook rapids

American Whitewater 44.3170, -71.7133

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Gauge Conditions

Ammonoosuc River at Bethlehem Junction, NH Upstream Primary

Runnable: 3.1 – 6.0 FT

Data from American Whitewater & USGS

Photo

Photo courtesy of American Whitewater

Description

After a long section of quickwater and class I the river approaches Alderbrook rapids about a half-mile below the powerline crossing. Portaging is easiest from river right, which is also the roadside. The rapid is series of large boulders and occasional eddies that define a consistent zig-zag through-line driving mainly river-center. There are some powerful pour-overs that will set your boat on a trajectory into the next boulder, so work is required to maintain the zig-zag pattern to the end of the rapid.