Construction of three tunnel sections on the Blue Line of the Metro of Lisbon, between the Terminal of Falagueira and Alfornelos Subway Stations. They sum up 896 m of underground excavation length: the first, Falagueira Terminal, is 513 m long and the other two are 98 m and 285 m long, respectively. The excavation section varies between 70 m2 and 112 m2. Construction of the Ventilation Shaft PV3, composed of the PV3 tunnel, 50 m long and excavation section of 109 m2, connection gallery, 10 m long and excavation section of 62,5 m2 and pumping well. Excavation: 60.772 m3. Structural concrete 15.668 m3.