This Contract Aims To Carry Out The Works Included In The Project “Renovation Of Paving And Services On C/ Lluís Companys D’Arnes”, Drafted By Tengi Consultoria Técnica, Sl, Of The Environment, Public Health, Municipal Engineering And Territory Service Of The Provincial Council Of Tarragona. The Expression Of The Coding Corresponding To The Nomenclature Of The Common Procurement Vocabulary (Cpv) Are • 45233252-0 Street Paving Works. • 45233300-2 Foundation Works For Motorways, Roads, Streets And Pedestrian Paths. • 45232400-6 Sewerage Works • 45231300-8 Construction Works For Water And Wastewater Pipelines • 45232130-2 Construction Works For Rainwater Pipelines. The Non-Division Into Lots Is Justified In Accordance With The Following: Carrying Out The Works Contained In The Technical Project Mentioned In Two Lots Would Mean An Increase In Cost, With Respect To The Estimated Budget For A Single Lot Tender, Due Basically To The Absence Of Operational And Organizational Synergies, As Well As The Lack Of Efficiency In Operational And Investment Costs. In This Sense, It Is Very Important To Point Out The Limitation Of The Administration'S Resources And Its Obligation To Be Efficient In The Management Of These Resources. It Should Be Noted That: - The Centralized And Coordinated Management Of The Actions Implies Significant Economies Of Scale. - The Structural Means Of The Awarded Company Have An Impact On The Price Paid By The City Council, This Structure Is Only One In The Case Of Unification Of Lots. - Carrying Out The Works In One Unit By A Single Bidder Allows Sharing Mechanical Means With The Consequent Reduction In Investment Costs In These Mechanical Means.