1955 Map of Ketchikan B-1

About this map

The Portland Canal serves as the international boundary between the United States and Canada in this mid-century survey of Southeast Alaska. This maritime frontier is defined by the steep slopes of the Rousseau Range and the Peabody Mountains, all contained within the Tongass National Forest. The map documents a series of reference monuments, such as Ref Mon S-19 and Ref Mon S-20, which mark the precise geopolitical line through these waters.