Contract work consisting of excavation, application of primary support and definitive support for 1159 m of tunnel with a variable section of 68.4 m2 to 158.7 m2 and a 24.5 m deep shaft with a diameter of 18 m and a section of 246 m2. The total estimated excavation volume is 111,000 m3, the estimated concrete volume is 14,000 m3 and the amount of steel to be applied is 786 Ton.