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Columbia River System (1998)

U.S. map showing 1998 freight flows by truck, with more than 1 million tons shown flowing from Columbia River system ports to Washington; between 500,000 and 1 million tons to Oregon; and between 250,000 and 500,000 to Michigan. Network flows by truck from the ports also are shown in Alaska and all 48 contiguous states, with more than 1 million tons of commodity flows by truck to Washington, Oregon, and Illinois.

High resolution version of map [PDF 578KB]

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