Open invitation to tender, deadline 02/09/2025, for technical assistance during monitoring and supervision of the tunnels Villabona 90I (902 M) and 90II (853 m) renovation project on the Leon - Gijon conventional gauge railway line. Click here for bid documents and here where tenders must be sent. Value of the contract is EUR 1.92 million, excluding VAT. Duration of contract will be 21 months. Contact Adif, Madrid, tel +34 91 300 76 61, email comprascontratacion@adif.es. Visit https://ted.europa.eu/en/notice/-/detail/408955-2025. Ref.n. 3.25/27507.0107. 27/25.

Open invitation to tender, deadline 02/09/2025, for the maintenance of tunnel systems and equipment on state roads. Click here for bid documents and where tenders must be sent. Duration of the contract is 12 months. Contact Public Enterprise for State Roads, attn Zaklina S. Bogdanovska, Skopje, tel +389 23118044, fax +389 23220535, email zaklinab@roads.org.mk. Visit https://ted.europa.eu/en/notice/-/detail/485699-2025. Ref.n. 13306/2025. 31/25

Link to tender/bid documents https://e-nabavki.gov.mk/PublicAccess/home.aspx#/dossie/7fb79c8d-0803-4466-a27d-212279b93b7b/1

Open invitation to tender, deadline 03/09/2025, for management support services during the construction of the Serantes Connection , Phase 1, South Bypass of Bilbao. The new line will connect Bilbao with its harbour. Click here  for bid documents and here where tenders must be sent. Value of contract EUR3.13 million contract, excluding VAT. Duration of contract 42 months. Contact ETS - Euskal Trenbide Sarea, Bilbao, tel+34 946572600 , email kontratazioa@ets-rfv.eus. Visit https://ted.europa.eu/en/notice/-/detail/486802-2025. Ref.n. P20026851. 31/25.

Open invitation to tender, deadline 11/09/2025, for the optimisation of the Gubrist tunnel drainage, Affoltern portal area includes (Lot 388), part of the N01/38, Zurich Northern Bypass extension. Click here for bid documents. Duration of the contract is from 01/01/2026 to 31/12/2027. Contact Ofrou, Winterthur, tel +41 58 480 47 11, email beschaffung.winterthur@astra.admin.ch.  Visit https://ted.europa.eu/en/notice/-/detail/485148-2025. Ref. n. MP-100047. 31/25.

Open invitation to tender, deadline 15/09/2025, for inspection organization of various technical areas of the Norrbotnia/North Bothnia Line. Click here for bid documents and where tenders must be sent. Value of contract EUR 1.71 million (SEK19 million), excluding VAT. Duration contract from 01/01/2026 to 31/12/2032. Contact Trafikverket Myndighet, attn Marianne Werner, Borlange, tel +46 070-215 40 91, email marianne.werner@trafikverket.se. Visit https://ted.europa.eu/en/notice/-/detail/385515-2025. Ref.n. KOM-414787. 25/25.

Open invitation to tender, deadline 15/09/2025, for the surveillance of infrastructures managed by Società Autostrada Tirrenica p.a., pursuant to the LLGG Bridges (Ministerial Decree 204/2022) and LLGG Tunnels (Ministerial Decree 247/2022), and tests and investigations in support of the surveillance service. Click here for bid documents and where tenders must be sent. Value of contract is EUR 1.54 million, excluding VAT. Contact SAT Società Autostrada Tirrenica p.A., Rome, tel +39 0643634763, email autostradatirrenica@pec.tirrenica.it. Visit https://ted.europa.eu/en/notice/-/detail/427044-2025. Ref.n. 20-S-2025. 27/25.

Restricted invitation to tender, deadline 22/09/2025, for engineering services for the replacement of tunnel fans in the railway tunnels on the Betuweroute, a 160 km-long double-track freight railway linking the Mainport Rotterdam with Zevenaar on the Dutch/German border. Click here for bid/tender documents and where tenders must be sent. Duration of the contract from 01/01/2026 to 31/12/2029. Contact ProRail B.V., attn Joost Witjes, Utrecht, tel +31 0634008278, email aanbestedingen@prorail.nl. Visit  https://ted.europa.eu/en/notice/-/detail/448179-2025. 28/25.