The through arch steel structure (arch + deck) was divided into 3 partial steel substructures:
Tied Arch
A temporary platform was erected at the bed of the reservoir on which the central 120 m of the steel deck was assembled.
 Falsework towers were erected at the same position as the final hangers and each semi-arch was divided into three steel transport segments, supported on the towers and joined to each other as well as to the ends of the deck.
 After the hangers were located, the shoring was removed; loading the steel tied arch bridge.

Approaching spans and Cantilevers
The steel structure of the approaching spans of each bank were assembled on the ground and then placed, using a crane, on the piers.
 The steel bases of the arches (the distance from the arch’s basement to the deck’s intersection) were then placed in one single operation with a crane (33m in cantilever) and embedded into the foundation block.
 Having positioned the two pieces of the arches on one bank, they were joined at the top by means of a steel brace placed with a crane.
 Consequently, the crane placed the steel structure of the deck from pier to the arch-deck section.

Lifting
Once the three self-supporting partial steel structures had been built, the bowstring arch was raised into position, joining the three partial arches.

The side walls of the abutments contain retaining prestressed tendons which were used to fix the deck to the abutment during the lift.
 Once tensioned, the 470 ton bowstring was raised 40 m, using a lifting machine, to its final level, taking just eight hours by subcontractor ALE Lastra.
 The arches were then joined, the tendons in the abutments released and the decks connected.
The through arch steel structure (arch + deck) was divided into 3 partial steel substructures:
Tied Arch
A temporary platform was erected at the bed of the reservoir on which the central 120 m of the steel deck was assembled.  Falsework towers were erected at the same position as the final hangers and each semi-arch was divided into three steel transport segments, supported on the towers and joined to each other as well as to the ends of the deck.  After the hangers were located, the shoring was removed; loading the steel tied arch bridge.
Approaching spans and Cantilevers
The steel structure of the approaching spans of each bank were assembled on the ground and then placed, using a crane, on the piers.  The steel bases of the arches (the distance from the arch’s basement to the deck’s intersection) were then placed in one single operation with a crane (33m in cantilever) and embedded into the foundation block.  Having positioned the two pieces of the arches on one bank, they were joined at the top by means of a steel brace placed with a crane.  Consequently, the crane placed the steel structure of the deck from pier to the arch-deck section.
Lifting
Once the three self-supporting partial steel structures had been built, the bowstring arch was raised into position, joining the three partial arches.
The side walls of the abutments contain retaining prestressed tendons which were used to fix the deck to the abutment during the lift.  Once tensioned, the 470 ton bowstring was raised 40 m, using a lifting machine, to its final level, taking just eight hours by subcontractor ALE Lastra.  The arches were then joined, the tendons in the abutments released and the decks connected.
La Vicaria Arch Bridge