Dom Luís Bridge
|Luís I bridge|
|Official name||Ponte Luís I|
|Carries||Light rail (tramway) bridge / metro rail bridge
|Locale||Porto to Vila Nova de Gaia|
|Design||two-hinged double-deck arch bridge|
|Total length||385.25 metres (1,263.9 ft)|
|Height||44.6 metres (146 ft)|
|Longest span||172 metres (564 ft)|
|Construction cost||369,000 escudos|
The Luís I (or Luiz I) Bridge (Portuguese: Ponte Luís I or Luiz I) is a metal arch bridge that spans the Douro River between the cities of Porto and Vila Nova de Gaia in Portugal. 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. Téophile Seyrig had engineered the D. Maria Pia Bridge project nearby, whilst working as a partner of Eiffel. He now took sole responsibility for the new, major Luís I Bridge. The construction was begun in 1881 and the bridge opened on 31 October 1886.
- Total length 385.25 m
- Weight 3045 tons
- The arch measures 172 m in length and 44.6 m in height
Originally built to carry road traffic on both decks, at various times it saw trams on the upper and trolleybuses on the lower. Now the top deck is occupied by Line D of the Metro do Porto and a pedestrian walkway.
The bridge often is confused with the nearby Maria Pia Bridge, built nine years earlier and located a kilometre to the east. The earlier bridge only has one deck, however, even though they resemble each other.
- Manuel de Azeredo (December 1999), The Bridges of Porto - Technical Data, Faculty of Engineering, University of Porto, retrieved 12 August 2014
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