Winnipesaukee

At this water level you can just squeeze under the exit portals to the delapitated mill. At lower levels the floor of the room is covered with rebarr, at higher levels the portals are too low to pass under. At higher flows 1/4 of the river flow will pass through the 'Room of Doom' so avoid river right. Most of the time the 'Room of Doom' is filled with debris and impossible to run safely. Be especially carefull if you chose to surf 'Doomsday Wave' just above the 'Room of Doom', if you should break off to river right from the wave there is a high probability of getting pulled into the 'Room of Doom'