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. I

Below 600cfs  - You will scrape in numerous areas especially in the lower section, some drops may not be runnable. However, the holes will be tame.

Above 2000cfs- The holes start to get sticker, portaging may be necessary for some drops.

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

Gauge Information

Name Range Difficulty Updated Level
WEST BRANCH OSWEGATCHIE RIVER NEAR HARRISVILLE NY
usgs-04262500 600 - 3000 cfs IV+ 01h48m 200 cfs (too low)

gauge graph
RangeWater LevelDifficultyComment
600 -3000 cfs barely runnable-high runnable IV+ gauge is important or has warning The USGS gauge on the Oswegatchie in Harrisville provides an "approximation". The benchmarks below have many variables, so make sure you assess each drop yours

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

When River/Gauge Subject Level Reporter
7y18d08h52m /Grass-Lampsons Falls to Russell [NY] Downerville Take Out n/a Gregory R. Miller
7y19d06h02m /Grass-Lampsons Falls to Russell [NY] Downerville Take Out n/a Gregory R. Miller
7y19d18h28m /Grass-Lampsons Falls to Russell [NY] No Thanks 500 cfs Gregory R. Miller
7y19d20h18m /Grass-Lampsons Falls to Russell [NY] The Slots 2000 cfs Gregory R. Miller
7y20d01h13m /Grass-Lampsons Falls to Russell [NY] Dan's Hole n/a Gregory R. Miller
7y20d01h15m /Grass-Lampsons Falls to Russell [NY] S-Turn 2000 cfs Gregory R. Miller
7y20d02h23m /Grass-Lampsons Falls to Russell [NY] North Country Boof n/a Gregory R. Miller
7y20d02h25m /Grass-Lampsons Falls to Russell [NY] No Thanks 0 cfs Gregory R. Miller
7y20d02h26m /Grass-Lampsons Falls to Russell [NY] Thanks n/a Gregory R. Miller
7y20d02h26m /Grass-Lampsons Falls to Russell [NY] Old Bridge n/a Gregory R. Miller
> 10 years /Grass-Lampsons Falls to Russell [NY] Right Channel of North Country Boof 700cfs Ron Turney