Our well permitting data only goes to roughly 1985, that is when they began keeping actual data records of all well permits. So anything prior to that would not show up in our data, and there are still a few that have slipped thru in the early years. Then we switched over from the beginning Data system (Access to TIDEMARK) and during the conversion, we may have lost a few in the transfer, as often happens when switching from one database to another. BUT I kept the Old Access database as backup just in case I should need it- so I periodically review it for verification of data on various searches.