http://des.nh.gov/organization/divis...nts/090517.pdf
Read through that link as these are the rulings on permits filed to the DES regarding waterfront repairs, alterations and additions in the State of New Hampshire in the last two months. You will read of many repairs having to do with breakwaters, permanent docks shorefront erosion and so on. Remember a jetty, breakwater, dock, boathouse and shorefront below the high water mark are in the WETLANDS zone and are not controlled by the CSPA. It is a completely seperate permiting process and different rules that have not changed drastically in years. You can build a new boathouse, you can build a new permanent dock, all you need to do is play by the rules and do it there way in the areas that touch the water and prove that you will not ruin the bottom of the lake in doing so. If your project extends from the wetlands zone to the shorefront buffer, the wetlands permit trumps the CSPA. File a permit to repair your jetty, it has been in place for over 50 years and while you are at it file a permit to repair your beach that has been compromised due to the breakdown of your jetty.