Part of the Douro Litoral concession, this contract consists of the construction of two viaducts:

The Viaduct over the A4 highway, composed of two decks, each with an extension of 332.50 m the deck was built with a cantilever forming traveler system and a shoring system to support it.

The Viaduct over Ferreira river’s Valley, which the East deck totalizes 350 m and the West deck 385 m. On this viaduct, the deck is prefabricated and the formwork was only applied to the supporting pillars.