Construction planning; construction of port and port facilities, industrial buildings, commercial buildings, sanitation works, and infrastructure facilities, namely, roads, bridges, viaducts, dams, canals, tunnels and underground structures, squares; construction of projects in the nature of ports, industrial buildings, commercial buildings, sanitation works, and infrastructure facilities, namely, roads, bridges, viaducts, dams, canals, tunnels and underground structures, squares; building co...