Image: Nightnurse

The design, named by its designers ‘Un solo arco’ (Spanish for ‘one arch only’), was unanimously voted winner from 41 submitted entries. It is a 420m-long steel vehicular bridge with a 340m-long shallow arch span that crosses the valley and River Plessur at a height of 140m.

The winning team led by Conzett Bronzini Partner consists of Schlaich Bergemann Partner, Tuffli und Partner, D Jüngling und A Hagmann Architekten, Vogt Landschaftsarchitekten and Nightnurse Images.

“We dedicate the winning design to Jörg Schlaich, who passed away last week on September 4, 2021 at the age of 86. We feel deeply grateful to him and his work - as a renowned engineer and designer, he showed us how bridges can be beautiful, efficient and sustainable. The ‘Un solo arco’ is a tribute to his legacy,” said a representative of the winning team.

In second place was the cable-stayed design Piz Palü led by Calatrava Valls with Dr Bernasconi, Jäckli Geologie and Sargans. In third place was single arch bridge design Madleina, led by Gruner Wepf with Gruner (Basel) and K&L Architekten.

The specifications for the construction of the St Luzi Bridge were described by the Canton of Grisons as extremely demanding and the quality requirements correspondingly high. “The bridge project had to be structurally convincing as well as optimally integrated into the landscape in terms of design and environmental protection and be eligible for approval. From the total of 41 submitted project ideas, seven projects were shortlisted as part of a prequalification process,” said the official communication.

The crossing is being constructed to create a direct connection between Julierstrasse and Schanfiggerstrasse as well as to relieve traffic in the Sand district of Chur.

Image: Nightnurse