Item 85714 - Great Diamond Island Association property, Bay Avenue, Great Diamond Island, Portland, 1924 Item 85714 - Great Diamond Island Association property, Bay Avenue, Great Diamond Island, Portland, 1924 Contributed by City of Portland - Planning & Development Item 85714 Zoom 4728px x 3419px - 15.8"w x 11.4"h @ 300dpi | Need a larger size? *Credit line must read: Collections of City of Portland - Planning & Development Image Info Wharf at Bay Avenue in Great Diamond Island, Portland, was owned by Great Diamond Island Association in 1924. Show Details