Construction Management Services For The Renovation Works On Track 1 Between Gracia And Muntaner And The Bonanova Diagonals On The Barcelona-Vallès Line, Management Services For The Sleeper Replacement And Ballast Cleaning Works On The Llobregat-Anoia Line. Phase 1 And The Management Service Of The Track Renewal Works In The Santa Clara Tunnel Of The Llobregat - Anoia Railway Line Of The Generalitat De Catalunya. (Ref. Po148/25)