Tender process for the design/construction of Lisbon drainage tunnels and associated interventions

This project is being developed under the Lisbon Drainage Master Plan 2016-2030, preconizing the main structural intervention for flood control in Lisbon, consisting in the construction of two stormwater drainage tunnels: the Monsanto - Santa Apolonia tunnel with an internal diameter of 5.5 m and approximately 4.4 km length and the Chelas – Beato tunnel with approximately 1.1 km long and 5,5 m diameter, integrating associated intervetions of flow diversion and control.