Portland is near both the Willamette and Columbia Rivers, both of which have access to the Pacific Ocean. These rivers’ ocean access gave rise to the Portland steel industry during World War II, as ships could be built in Portland and sent to be used in the Pacific.
ការចូលដំណើរការមហាសមុទ្រទន្លេទាំងនេះបានបណ្ដាលឱ្យឧស្សាហកម្មដែកថែបទីក្រុង Portland ក្នុងកំឡុងពេលសង្គ្រាមលោកលើកទី II, as ships could be built in Portland and sent to be used in the Pacific .