Gauge Information

Gauge Description:



Season: April and May are generally the best months for the Grass, but Oct and Nov also offer windows of boatable flows following three or four days of good rain.

Flows: The USGS gauge on the Oswegatchie in Harrisville provides an "approximation". The benchmarks below have many variables, so make sure you assess each drop yourself, especially at MED and HIGH flows. If Harrisville gauge is rising:

MIN:750-800cfs (3.5') - You will scrape in numerous areas, but have enough for the main drops.
MED: 1100cfs (4.0') - Only slight scraping, but holes are tame.
HIGH: 1700 (4.75') - Ratchet up the difficulty of all rapids at least half a level. Holes are bad!

If Harrisville guage is dropping add 150 cfs to the flows above.

Visual "Gauge": Check the Graffiti on the river right rock just below the bridge in Degrasse. If water is rising and touching the bottom of the "heart", then you can scrape down the wide places and have good water for the drops. If water is dropping then middle of "heart" is the MIN mark.

Gauge Information

Name Range Difficulty Updated Level
WEST BRANCH OSWEGATCHIE R NR HARRISVILLE NY
usgs-04262500 800 - 2000 cfs IV-V 00h39m 313 cfs (rc= -0.6 )

RangeWater LevelDifficultyComment
0 - 800 cfs extremely Low-barely Low IV-V
800 -2000 cfs barely runnable-high runnable IV-V

Report - Reports of Grass, Lower S. Branch Twin Falls and related gauges

Reports give the public a chance to report on river conditions throughout the country as well as log the history of a river.

Reports

When River/Gauge Subject Level Reporter
Grasse [ny] Grasse, Twin Falls 900 cfs simon wiles
Lower S. Branch of Grass River [NY] Basford Falls 3 High! Tim Kelley
Lower S. Branch Grass River [NY] Twin Falls n/a Tim Kelley
Grass River [NY] Large Marge (Rainbow Falls) n/a Tim Kelley
Grasse River [NY] Iron Bridge n/a Tim Kelley
6y304d11h07m Grass, Lower S. Branch [NY] Twin Falls n/a Glenn Wallace
8y272d11h07m Grass, S. Branch [NY] Grass River n/a Patrick Rogers