Bidding Announcement Of: Adif -Administration Terch. Object: Algeciras Railway Highway Works -Zaragoza: -Línea 400 Protection And Drainage Of The Slopes Of The Andújar Tunnel -Treatment Of The Arjonilla Arroyo Bridge And Of Clearing Stabilization -Terraplenes (Pp.Kk. 343+100 And 346+970). File: 3.25/06110.0100.