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

Below 600cfs  - You will scrape in numerous areas, however is still runnable.

The upper runnable level is not a definite as the river will have larger wave trains as the level increases. But caution should be taken as flipping may result in a longer swim.
 

Gauge Information

Name Range Difficulty Updated Level
WEST BRANCH OSWEGATCHIE RIVER NEAR HARRISVILLE NY
usgs-04262500 400 - 4000 cfs I-II 01h47m ~ 284 cfs (too low)

gauge graph
RangeWater LevelDifficultyComment
400 -4000 cfs barely runnable-high runnable I-II gauge is important or has warning The USGS gauge on the Oswegatchie in Harrisville provides an "approximation". The benchmarks below have many variables, so proper assessment is necessary

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

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