Donald,
You would really have to have a good water well to replenish the pond within 4 to 5 days, what about you water well pump, will it heat up and burn out? Fish will not live in 4 foot water if they are any size. I would say, a 16 foot deep pond will not frac a well. It may drill one and that is all. If you have cattle, I wouldn't sell any water. It's just starting Aug and who know what kind of weather we will have or if it doesn't rain.