The placement of the international boundary in the Portland Canal was a major issue during the negotiations over the Alaska Boundary Dispute, which heated up as a result of the Klondike Gold Rush and ended by arbitration in 1903. According to the treaty, the international boundary is to follow the shoreline of the American side of the inlet, but American maps continue to show the boundary as being down the centre of the inlet. The same issue still remains with the A-B Line on the north side of the nearby Dixon Entrance.