Specifications include, but are not limited to: The Project work involves, but is not limited to, the building of the Central Tunnels which consists of (4) 9' diameter tunnels and (5) 10' diameter tunnels crossing under various roads located in Bella Vista. The construction of the tunnels involve, but is not limited to, traffic control, pavement removal and excavation, waterline relocation, the installation of tunnel structures, end-walls, and retaining walls, and the reconstruction of the road. The Central Bridges involves, but is not limited to, the construction of bridge abutments and bridge placement/erection for three bridges, one of which will contain a center pier. Two bridges will be prefabricated and placed on the abutments. The third bridge will be constructed on site.