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Vertical lift bridge - PowerPoint PPT Presentation

Portland Bridges

Portland Bridges. by Ms. Polkow's third grade researchers, Ainsworth Elementary. The Morrison Bridge. The Morrison Bridge was built in 1887, it was the first bridge built in Portland First it was made out of wood then it rotted so they had to replace it with the Morrison Bridge we have now.

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Vertical lift bridge - PowerPoint PPT Presentation

Portland Bridges