Hyderabad-based Nagarjuna Construction Company, (NCC), the second largest construction company in the country, has bagged a major order from the Oman government for the Wadi Adai Al Amerat road project.The project cost is estimated to be around Rs 570 crore. The proposed 7.5-kilometre road is to be completed in 18 months.The project involves the construction of six new bridges of varying lengths, nine box culverts and one single-lane bridge, said A Ranga Raju, managing director of NCC, in a press release issued today.