This Market Consists Of All The Work Allowing The Dismantling Of Existing Behaviors And Existing Pressure Regulation Equipment, As Well As The Reassembly Of New Stainless Steel Pipes And Regulation Equipment In The Technical Premises. An Upgrading Of Pressure Regulation Equipment In The Tunnel Galleries Is Also Part Of This Market. In Order Not To Disturb The Exploitation Of The Tunnel During These Works, A Provisional Water Pipe In The Technical Premises Will Be Installed In Order To Guarantee The Food For Extinction In The Tunnel At All Times.