The Corgo Viaduct is part of the Sub-concession of the Transmontana Highway, and consists of a 555-meter long bridge, with cable-stayed bridge over the river with 300 meters and a height of 130 meters, to which was added the height of the central tower - cable stay anchorage - of about 63 meters high. Adjacent to its extremes are two viaducts, one to the west with 965 meters and the other to the east with around 1,280 meters, making a total of 2.8 kilometers.

The viaduct has a total of 41 pillars, six of them with more than 100 meters high and two central with 130 meters to the the bridge deck and 63 meters above it.

The FCM executed the construction of the pillars and abutments of the Viaduct with 1,280m, constituted by 22 pillars, with heights between 21 and 113m, being that 10 pillars reach heights superior to 85m.

The cross sections are characterized by the octagonal geometries of five different types which involved a specific study for optimization and rotation of the formwork and respective platforms. In total was executed 1,600m linear pillar, using systems of elevation of climbing and self-climbing formwork with the use of hydraulic systems.

The formwork solution adopted and the professionalism of the FCM team have allowed high yields, always guaranteeing the high standards of quality and demand for a job of this size, as well as the safety of all workers involved.