Do you have an HOA? Is your property waterfront? Check your covenants and restrictions. Check up on any local ordinances affecting the use of the lake. If you can, you will likely need to get approval from the HOA, and/or the local governmental body that issues building permits.

Joe,
If you do not have a statement of specific rights, look at your deed to see if there is a recorded document referenced.
Do you know a good REal Estate agent in the area where your property is located? ASk them for help. We often get questions from neighbors and friends about real estate matters, and we are glad to help where we can, with the understanding that when you need a Realtor you won't forget us.
Blessings in your search,
Mim

Hi Joe,
It depends! Take a look at your document that states what your rights are. It should indicate what the scope of those rights are? It may only to swim, or to put a non-motorized boat out.
Hope that helps