The work and the technique: Rosario-Victoria motorway bridge, Argentina

The work, consisting of bridges, viaducts and underground sections, crosses the river's main course, touching down on several islands in the Paraná delta.

The Nuestra Señora del Rosario bridge is 4,098 metres long and consists of two access viaducts, a 2,368-metre one to the east, with 39 spans of 60 metres plus an initial 46-metre span, and 1,122-metre one to the west, consisting of 32 spans of 35 metres.The main part is a 608 m long cable-stayed structure with a 350 m central span.

After building one main and one anchor pile, the deck's construction began from the main pile, laying 10.40 m long sections. Each of the main piles comprises two shafts with a rectangular box section, tapering from 6 x 2.75 m at the base to 4 x 2.75 m at 106.25 m and then continuing with this same section to the summit at 133.25 m.

The foundation of each main pile rests on 26 piles 2 m in diameter to a maximum depth of 60 m. The deck consists of a continuous structure formed by two longitudinal beams and a 30 cm thick slab, reinforced by transverse beams every 5.20 metres.

Apart from the main bridge, 12 bridges were built in the area of the islands with a total length of 8,184 metres, crossing the various minor watercourses in the Paraná Valley.

The motorway officially opened on 22 May 2003.