en A tunnel between the High Atlas mountains, to escape from the trap, is that the pass of Tizi N-Tichka pass (2900 m)? The idea is not new and occurs regularly, if the project can be done. already been made at the time of the Protectorate in 1945, an advance of a few tens of meters, were transported to the mineral, but soon, probably for reasons of cost, we opted for a device.