rcgoblue, contact your local NRCS agent ate the USDA office that services your county. They are a taxpayer supported service intended to give you advice and options on what will be best with your soils, watershed and topography available. Some agents can even do core samples to discover the deeper soils, map out a dam location and even loosely supervise the construction. They are NOT allowed to suggest dirt movers or pond builders, but asked correctly who they would hire if it were their pond, most will answer honestly.
