Brettski,
I think the one side of the bowl is not as high as it would need to be to build a Dam. In other words, if the Damn was 10 feet, then on the other side of the bowl would need to be 10 feet. It's a very gradual steepness, so by the time I got to the 10 foot height, it would drown out a huge pine tree section which is one of the prettiest sections of the property.
