TT,
I would start with the local NRCS office. The water table varies from area to area and season to season. The water table is generally thought of as the top layer of an aquifer, generally it is not available, because of depth, to supply a pond with water except as a water well. However, there are exceptions. To work with an excavated pond that is tapped into the water table generally requires a drag line or sometimes a trackhoe can work.
My curiousity is at a high level. I'll be checking in and out most of the day.
