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
Put In rapid marks the starting point for the run, with a moderate gradient and scattered boulder garden entry. Paddlers should be prepared for potential rock dodging and uneven water flow, with careful route selection critical in the initial section. No major hazards are immediately apparent, but vigilance and precise maneuvering are recommended when launching into the river.