Studies of Karbala and Shabab tunnels in Ilam province
Karbala road tunnel with a length of 422 meters, width and height of 1200 and 860 centimeters, was built at Ilam-Mehran road in 1975.
Shabab 1 and 2 tunnels are located at Ilam-Hamil road and have been constructed with lengths of 176 and 113 meters and width of 10 meters, respectively, covered with masonry lining system.
