The "Non-Coastal Boardwalks" category speaks of listing ones that span marshes and swamps, providing access to the inner areas of these natural areas. It goes on to state that ones along the ocean cannot be listed there and to put them in the other category.
That category doesn't seem to exist, so let's make it! Join up in the new group to help with Coastal Boardwalk - Plankplacers and like always the first four will be promoted to Officer.
BQ