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.

W Br Oswegatchie R Nr Harisvl [ NY ]

Current Conditions Stage Flow Updated 3.93 1000 12/3 3:30 Station Graphs

Linked Reaches

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Level Legend:

Running

Below Minimum Recommended Flow

Above Maximum Recommended Flow

Unknown

Descriptions of reaches with River Name in bold have been verified by a regional StreamTeam member.

State	River Name/Section	Class	Level	Rel. Level	Updated
NY	Grass— Lampsons Falls to Russell	IV+	1,000 cfs	med	12/3 3:30
NY	Grass, Lower S. Branch— Twin Falls	IV-V	1,000 cfs	med	12/3 3:30
NY	Grass, Middle Branch— Tracy Brook to Clare Rd.	III-IV(V)	1,000 cfs	low	12/3 3:30
NY	Oswegatchie, Middle Branch— Section #3 (Rainbow Falls)	IV-V	1,000 cfs	low	12/3 3:30
NY	Oswegatchie, Middle Branch— Section #4 (Sluice Falls Section)	IV-V	1,000 cfs	med	12/3 3:30
NY	Oswegatchie, W. Branch— Bisha Falls to Jerden Falls	V+	1,000.00	low	12/3 3:30

Station Description

AW Gauge ID:	2039
USGS Station:	04262500
HUC:	04150302
Latitude:	44.1856
Longitude:	-75.3311
Class:	6