The collapse apparently was the result of a collision between the tractor-trailer's cargo and the bridge, Washington State Patrol Sgt.

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That's where a cargo ship smashed into a bridge last week.

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Considerably lower than the adjoining streets, it is hemmed in on one side by a heavily used traffic bridge and by a transfer yard for cargo containers on the other.

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Constructed in 1931, the engineers and architects who designed the bridge never could have imagined the size of cargo ships that would be destined for the Port.

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