Totally 19 companies including Doğuş, Nurol, Cemil Özgür, Limak, Gama, Özaltın, Cengiz ve Yüksel Construction have applied to State Hydraulic Work ‘s tender for Konya Blue Tunnel Project. Pre –qualification applications are completed for Blue Tunnel Project in which the largest irrigation tunnels of Turkey shall be established after Şanlıurfa and which shall be provided together with Bağbaşı Dam.