The Object Of The Contract Is The Execution Of The Works Included In The Executive Project For The Contracting Of The Works: Lot 1: Civil Works, Lot 2: Hydraulic And Lot 3: Pumping System For The Construction Of A Reservoir Water In A Technical Room Of The Swimming Pools Of The Llobregat Sports Park For The Improvement Of Environmental Sustainability, Drawn Up By Nesco Ingeniería Y Consultoría, Sl In May 2024. The Purpose Of This Project Is To Define, Justify And Evaluate The Works Necessary For To The Construction Of A Tank With Concrete Walls Taking Advantage Of A Basement Room Of The Technical Room And Pumping System. The Proposed Solution Consists Of The Design Of Two "In Situ" Aerated Concrete Tanks, For The Reuse Of Evacuated Water From The Renewal Of Water From The Maintenance Of The Municipal Swimming Pool. The Tank Named In The Project As Tank Number 2 Will Accumulate Water Directly From The Renovation Of The Swimming Pool, While The Tank Called As Number 1 Will Accumulate The Water Coming From Tank 2 Which Will Previously Be Treated By A Carbon Filter. The Hydraulic Installation Allows, By Means Of The Manual Valves And Pumping System, To Direct The Flow Of Water Towards The Irrigation Network Of The Same Sports Complex Or To Allocate It To A Watering Hole That Will Be Located On The Street Pavement Of Football, And Thus Will Allow The Loading Of Trucks For Use On The Streets Of The City.