You may be able to register your existing dock and that will allow repairs or replacement as long as the dimensions stay the same. That will make it exempt from permitting. I think the main requirement is that the dock remains the same size and you can document that it has been in place since 2020. In addition to any documentation you submit they will look at Google Images to see what has been in place. I just did one and it was not that difficult. I got the registration back in less than a month.
Purpose
Voluntary registration is an alternative to getting a permit for every repair or replacement of existing non-tidal permanent docking structures. It also offers owners an easier way to prove compliance with certain state statutes and rules when buying or selling properties that include these structures.
Applicability
The repair or replacement of legally existing docking structures in non-tidal waters shall be exempt from the permitting requirements of RSA 482-A:3, provided that the structures have a valid registration filed with the department by the owner of the property, in accordance with RSA 482-A:11, XI, as described in RSA 482-A:3, IV-a(b).
https://onlineforms.nh.gov/app/#/for...nhdes-w-06-096