The project involves the replacement of the bridge over the Mandola stream in the center of Calceranica since the existing one presents both structural problems and hydraulic ones. The new proposal foresees an arch bridge with a single span of 30 m made in pigmented concrete that allows to provide the necessary hydraulic flow calculated for the river basin. Special attention was paid to the need of giving to the new bridge a character, which is appropriated to the historic center.