Peaks Island Military Reservation, as seen on this sites entry map, consisting of 184 acres, more or less, was acquired by purchase and condemnation between 1906 and 1943. The Army used the site for harbor defense purposes during World Wars I
and II. A searchlight shelter, a generator building and one bunker were built in 1906 as part of the Portland Harbor Defenses. The Army built two batteries (Steele and Cravens), bunkers, gun emplacements, a mine casement, and five towers on the site in 1942 and 1943. The site was conveyed to private owners in 1949 and 1958. The site has developed into a predominantly residential area with private ownership. A portion is owned by Portland.
No further action. The bunker has been privately owned since Government ownership. It appears that the debris was a result of island residents or vandals.