I have seen an article in the Chronicle about a company that will submit dock permits for you. I think they are in the Ketchum area. I would think they could help you with this situation. I would also ask at what lake evelvation the 1/3 rule is based on. If you have a gentle slope it could make a big difference. I would also ask how the distance was measured because it might not be very accurate. To check the distances you might borrow a sight distance meter from a golfer and make some measurements yourself to see where you really stand.