1948 Map of Sumdum A-6

About this map

Kupreanof Island dominates the southern half of this mid-century maritime survey, characterized by the prominent elevation of Turn Mountain and the surrounding wilderness of the Tongass National Forest. The map details a complex coastal interface where the open waters of Frederick Sound meet the narrower passage of Keku Strait. Small offshore features like Turnabout I, Schooner I, and the treacherous Pinta Rocks provide critical navigation context for the period. Significant freshwater drainage is noted at Gunnuk Creek, which flows into the strait near the island's northwestern edge. The inclusion of sites like Slate No 2 suggests early industrial or mineral interest in the shoreline’s geology, while landmarks such as Pinta Pt define the rugged coastal geometry of Southeast Alaska as it was recorded just after the war.