Open invitation to tender, deadline 19/11/2024, for the adaption works of the 13 tunnels with a total length of over 3.5 km on Algeciras-Zaragoza railway: Venta de Cárdenas 1,2,3 and 4; Las Correderas 1, 2 and 3; Santa Elena, Calancha, Vilches, Espeluy and Andújar (1024 m, the longest); and Montoro. Click here for bid/tender documents and here where tenders must be sent. Value of the contract is EUR 29.67 million, excluding VAT. Duration of the contract will be 13 months. Contact Adif, Madrid, tel +34 917744804, email comprascontratacion@adif.es. Visit https://ted.europa.eu/en/notice/-/detail/634881-2024 and https://www.adif.es. Ref.n. 3.24/06110.0134. 43/24.