I have a site 15-20 acres in beautiful rolling wooded hills that I am trying to dam up. I have civil and soil engineers and NRCS help. I have done an intensive soil survey. Result: Everyone agrees the dam will hold. The NRCS says that due to the sandy nature of some of the sides of the pond that the water will just escape there. Does anyone have similar experiences that they have worked out? The dam itself would be 25ft high with a 20ft water depth which just increases any expense dramatically. I have put alot of time and $ into this and I feel like I am no closer. ALL input would be GREATLY APPRECIATED! THANKS.