In the beginning, CDI have many contribution for infrastructure design in Kalimantan, which have complex problem in soil. More than 250 bridges and 750 km of road design in Kalimantan. Long spam bridges is one of our specialty and already followed by other provinces. The next phase, we expanded our services to special design in Airports and Seaport. Our premium project is structure detail design for Terminal 3 Ultimate Soekarno-Hatta International Airport (50mil pax/year) and Masterplan + Basic Design of Sultan Hasanuddin International Airport, Makassar (60mil pax/year).