Ammonoosuc (Upper), New Hampshire, US
|Usual Difficulty||II (for normal flows)|
|Avg. Gradient||30 fpm|
|Max Gradient||45 fpm|
|river-10531||2200 - 4000 cfs||II||cfs|
|UPPER AMMONOOSUC RIVER NEAR GROVETON, NH|
|usgs-01130000||2200 - 4000 cfs||II||00h26m||90.5 cfs (too low)|
The Upper Ammo needs a lot water for a fluid run. Therefore you would be hard pressed to find this river running unless everything else in the neighborhood is at or near flood stage. The river itself is an easy class I-II at the begining and eventually builds up to a steady class II with a few small ledge drops. Gorge-us is the most difficult section in this run. It is recognized by a sharp right bend up against a shear granite wall on river left approximately 4.8 miles below the put-in. Gorge-us should be considered a class II+ or III depending on level. It is easily portaged on river right.
Be aware that most of this run is wild and a difficult bush wack back to civilization, it makes for a great northern New England wilderness experience but a nightmare if problems arise.
|Mile||Rapid Name||Class||Features (Legend)|
4.8 miles from the put in you will come across a few more difficult and tightly spaced ledge drops of about 1 to 2 feet. When you see the river take a sharp right up against the granite wall on river left take on on river right to scout and/or portage. The rapid itself is only 30 yards long but drops steeply with three or more large hole / waves in the center flow. You can sneak the right side but look out for shallow rocks that could push you back into the main flow. The tail end of the rapid produces some nice symetrical surfing waves with a good access eddy on both sides.