Janesville, upper dam

The first dam in Janesville has a hydro plant on river-right (to the left of the photo). The main dam slopes off steep and slams hard into a line of rocks at the base (to disperse the force of the water and reduce hydraulic scouring of the river bed). Between the main dam and the walls of the power-plant, there are releasable gates which allow 'excess' water to pour through. This tongue of water creates a huge surging hole in the river/pool bleow. At the flow in the photo (3440 cfs on gauge), play would be impossible. It is conceivable that there could be some flow at which a potentially playable wave could occur. There is a portage path for canoes to get around the dam and back into the river downstream, so there is convenient access. So . . . has anyone ever looked at this, or put-in and found it playable?

(Listed distance is road miles from Indianford, not river miles.)