Welcome to PBF John,
I recommend against digging a hole in the bottom of your pond. You may find it acts as a drain instead of a source of fresh water! Is it possible to run a ditch from the current "well" to the pond? This could possibly keep the pond level from going lower then the "well" level. Are you sure the pond level is not just following the level of the water table vs "seeping?"
Edited by Bill D. (12/16/18 08:16 AM)
You'll never know what ya can catch unless you wet a line!