Alternative route Cossato-Vallemossotrivero and Canton Colombo-Mottalciata
Customer:ARES Piemonte
Years: 2006 – 2011 (Built)
Activities: Final Design of variances, Environmental monitoring site supervision, Environment (Control of legislation for EIS procedure), Site Supervision
Project cost: Euro 93.5 mln of works
Data: Total development of 8.3 km
The variants “Cossato – Vallemosso – Trivero (2nd trunk – 3rd lot)” and “Canton Colombo – Mottalciata” have a total development of 8.3 km; have been grouped together in a single contract (although they involve two separate sections of SR 232) and represent the natural functional completion of a series of modernization works carried out, starting in the 1960s, along the entire axis of SR 232 “Panoramica Zegna”, in the eastern area of the Province of Biella, in order to facilitate accessibility and economic and industrial development of the municipalities concerned both in the piedmont and plain areas.
Both new arterial roads are conceived as modern infrastructures, characterized by planimetric developments that are as fluid as possible in order to favor the smoothness of the route, while fully respecting the characteristics of the crossed territory and the environmental constraints present.
In fact, considerable detail was devoted to the landscape-environmental insertion of the work, which can be summarized as follows:
- restoration of the pre-existing morphology of the terrain for sections in artificial tunnels, or at the mouths of natural tunnels;
- use of locally derived natural stone revetments for the earthworks;
- functional and perceptual upgrading of interchange areas through the planting of tree and shrub species with ornamental values;
- use of special technologies, such as reinforced soils and appropriately greened cellular walls, to mitigate the visual impact of the realized works;
- use of lattice girders instead of full-core beams for metal decks made of Corten steel.
Variant “Cossato – Vallemosso” (5,200 m total length)
- 5 m platform width (2 lanes of 3.75 m, 2 platforms of 1.50 m – type C1)
- 1 “ram jump” interchange at the beginning of the Variant, in the municipality of Quaregna
- 7 viaducts for a total length of 780 m
- 5 artificial tunnels for a total length of about 355 m
- 4 natural tunnels for a total length of about 1,750 m
- 1 4-arm traffic circle at the Valle Mosso terminal junction
Canton Colombo – Mottalciata” variant: (3,100 m total length)
- 50 m platform width (2 lanes 3.75 m, 2 platforms 1.50 m – type C1)
- 2 traffic circles of internal radius equal to 36.25 m at the beginning and end of the Variation
- 1 overpass with overall length equal to 85 m.
