““There is water at 25 or 30 feet”. The owner drilled and got good water at 27 feet.”
Hmmm. I wonder if the dowser had info that the next door neighbor had drilled a well and found water at 27 feet?
That is how we did our well years ago. Talked to people that had wells. Found water on the first try!
This well was in the middle of a large range area. Not many homes within a mile or so. The water table there varies from 25' to 650' deep. There is an artesian stream under my part of land I got from my parents. I may try to hit it and see if it still runs 24/7 in the near future.