Yes, the rim of the emergency spillway is just under the time stamp on this photo.
The path of the water and the catch basin for the emergency spillway is seen in this photo. It is all a natural grade once the water leaves the area above the service road, and it is the area of the catch basin that began to erode and work its way back to the concrete rim of the emergency spillway. The spillway is basically a lowered rim of the dam and there is no way to control flow of water over the lower rim except by lowering the level of the lake via the concrete spillway.
