Basically, you can do anything you want unless the neighbors complained.
In my case I have a neighbor who became a state representative so that he can get a 'land grant'. The 'land grant' allowed him to put in a miniature peninsular so that he can extend his dock out an extra 40 feet. Because of this it allowed sand to migrate up onto my property. I gained a beach and a dry dock. Naturally I cannot extend my dock so I can use it because I can't use the statement, the neighbor's land grant effected my property. Politicians rules.
I have ask if I can remove the sand and the DES turned it down. I can't do anyting because my neigbor always complains about every little thing I do. If I camplain about him, I'm given a deaf ear.