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Ponte Lus I is a metal arch bridge that spans the Douro River between the cities of Porto and Vila Nova de Gaia. At the time of construction its span of 172 m was the longest of its type in the world.

The government held a competition for the construction of a metallic bridge over the Douro River on a site that was adjacent to an existing bridge that it would replace. T駮phile Seyrig had engineered the D. Maria Pia Bridge project nearby, whilst working as a partner of Gustave Eiffel. He now took sole responsibility for the new, major Lus I Bridge. The construction was begun in 1881 and the bridge opened on 31 October 1886 (the upper deck; the lower deck opened in 1887).
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source: wikipedia

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Additional Photos by Daniel Draghici (dkmurphys) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5849 W: 83 N: 11987] (79209)
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