Tender TO 09/24 – Execution of works and services “State Road No. 337 ‘della Valle Vigezzo’. Variant works and in-situ upgrading from km 23+900 to km 29+668 in the rockfall-prone section between the Municipality of Re and Ribellasca Bridge (VB) – 2nd section”

Functional upgrading of a section of S.S. 337 della Valle Vigezzo, approximately 5 km in length, together with the related secondary road network, aimed at providing a road platform compliant with Type C2 cross-section standards for secondary extra-urban roads. The works include the construction of:

Main engineering structures:

• No. 7 bridges and viaducts:
  • Re Viaduct – 84.90 m (3 spans of 28.30 m);
  • Folsogno Bridge – 35.00 m (1 span);
  • Meis Bridge – 50.00 m (1 span);
  • Orti Viaduct – 93.80 m (2 spans of 46.90 m);
  • Isella Bridge – 50.80 m (1 span);
  • Olgia 1 Viaduct – 86.80 m (2 spans of 43.40 m);
  • Olgia 2 Viaduct – 98.80 m (3 spans: 29.40 + 40.00 + 29.40 m).
• No. 2 bored tunnels:
  • Olgia 1 Tunnel – 848.00 m (variable cross-section 100–160 m²);
  • Olgia 2 Tunnel – 270.00 m (reinforced-concrete cross-section 100 m²).
• Retaining works and slope stabilization, including downslope and upslope retaining walls, anchored soldier-pile walls and cantilever slabs.
• Hydraulic works and drainage systems for water management and protection of the road platform.
• Construction of an approximately 1.5 km cycle path along the existing road alignment bypassed by the tunnels.
• Slope and roadway stabilization and safety works using rockfall protection nets and surface stabilization mesh.