The gauge is actually on the West Branch of the Oswegatchie after the Middle Branch joins it. There is no actual gauge on the Middle Branch. Keep this in min
The river narrows and drops quickly into a big hole. There is a nasty recirculating eddy on river left and a wall on river right. Scout from river right. This rapid is named in honor of a friend who left part of his tooth in this rapid. The "Tooth Ferry" took the tooth but I don't think my friend found a quarter under his pillow!