The project covered the construction of two parallel semi circular horse shoe tunnels 2×1220 m. Long and with diameter of 15,70 m. The tunnels are as part of the transportation system of facilitate the vehicular pilgrimage traffic between Kaabe and Holy.
The project covered the construction of two vehicular tunnels with dia 17.70m and length 2400m and associated toilet tunnels (dia 12.50m, length 857m.) as part of the Makkah Tunnels Leading to Haram project to facilitate the traffic between Holy Places.
The project covered the boring of 3 tunnels on the South West side of Golden Horn at Eyüp, Haliç and Fatih 1858 m, 2648 m, and 1877 m long respectively, 2 nos. of deep shaft constructions, construction of 19 manhole chambers, 1122 m R.C. piping.
The project comprised boring of 3 main and branch tunnels, installation of R.C. Pipes in open cut trenches and connection of branch collectors. All tunnels and pipes were PVC lined. The diameters of the tunnels vary from 1800 mm to 3200 mm.
The Project covers the cleaning, discharging, lightening and ventilation of existing pipeline of 2132 m in length.The reinstallation of box and pipes, trench excavation, installation and testing of 652 m long R.C. pipeline with diameter 3600 mm.
The project comprised the boring of 3 main and 2 branch tunnels, installation of R.C. Pipes in open cut trenches and connection of branch collectors.
The inner diameters of the tunnels vary from 1200 mm to 3600 mm with a total length of 8203 m.
The project covered the construction of a tunnel with a length of 277.5 m and construction of 2 nos of shafts with diameters 7000 and 11000 mm with depths 15.87 and 21.90 m.
The project covered the excavation and the first and second lining of 600 m long tunnel with inner diameter 3200 mm.
The project covered the construction of a 5.50 m inside diameter and 25 m deep shaft and its collar which is utilized for copper ore handling by Çayeli Copper Industries Co. Shaft deepeing up to 300 m deep concrete lining and steel stand construction.
The project covered the construction of a 340 m long tunnel with 3000 mm diameter and the construction of 1 no of shaft.