Eric, thank you so much, for your rough estimates. When we hit the fissure, we passed it under and through the backside with a 4" pipe. Also, it was wide enough, in it's highest area, that we put in a gravel seam encased in plastic, in the elevation higher than the 4" pipe in case of flood conditions, or in this case, filled lake conditions. This 4" pipe is running full steam. My guess is the gravel seem did it's thing, and isnow why I'm seeing the water 400' south of the dam. This gravel seam was conceived by experienced NRCS men, to pass in flood conditions, and now, with my lake half filled, it is a flood condition. The water has not been cut off from the seam.
In other words, the water has found the seam, as I suspected. Now I have to find where.
