Bidding Adif - Presidency Announcement. Object: Execution Of The Works Of The Treatment And Consolidation Project Of The Trench Located Between The Pp.Kk. 2+800 To 3+530. Line: Aigües Bifurcation - The Carol Tour - Enveigt (P.K. 50,707)/Puigcerdá. Section: Ripoll - La Tour De Carol. File: 3.25/27507.0065.