Open invitation to tender, deadline 17/07/2023, for the construction of the Ruby Line between Casa da Musica - Santo Ovídio at Porto/Oporto. The twin-track line, 6.3km long with 8 stations (Casa da Música, Campo Alegre, Arrabida, Candal, Rotunda, Devesas, Soares dos Reis and Santo Ovídio) will have 3 sub-sections (Casa da Música - Campo Alegre; Devesas-Soares dos Reis; Soares dos Reis - Santo Ovídio) in tunnel to be driven by NATM for a 2.5km totally length. For tender documents please click here where tenders must be sent. Value of the contract is EUR370 million, excluding VAT. Duration of the contract is 1095 days. Contact Metro do Porto SA, Porto/Oporto, email metro@metro-porto.pt. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=404688-2023, http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=280489-2023 and http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=000244-2023. Ref.n. CO/2023/199. 27/23.