Last week, Riccardo Garrè, CEO of Impresa Pizzarotti, accompanied by Lorenzo Zabbra, General Manager International BD & Operations of Pizzarotti Spa, and Mario Monzali, General Manager of Pizzarotti SA, visited several Pizzarotti Switzerland construction sites, including the Brienz drainage tunnel, where work is now 58% complete, and the Albula safety tunnel construction site, which is now 50% complete. Both construction sites are located in the canton of Grisons.