[QUOTE=YUNEMUS;9020166]
Let me change the question
What would happen if highlighted disputed area of Oregon Country / Columbia District was given to Canada ?
How it would affect Seattle and Vancouver (BC)?
[/QUOTE
Vancouver and Pugent Sound would still be the premier ports of the region. The Columbia bar is a major impediment for shipping. The ports to the north are very sheltered, easy to enter and exit and are closer to Asia (That is why Prince Rupert is a major container port).