Mapping repairs to the jetty and changes to the beach located near the Merrimack River entrance.
Used a balloon kit to map from the boardwalk leading to the beach then walked southeast towards the jetty, used a beach trail to travel southwest to Reservation Terrace, watched out for powerlines along Reservation Terrace, & looped back towards the jetty on Plum Island.
In the future, I'd like to track my path on the ground.
Scroll north to get to the jetty & see changes in the beach: https://mapknitter.org/maps/plum-island-map-3-13-13
Unsorted imagery of the jetty on the north section of Plum Island can be found at Mapmill from around page 70-100.