Contract Notice Road Tunnel Construction WorkA303 Amesbury To Berwick DownDescription Highways England Is Looking To Work Collaboratively With A High Performing Partner Their Supply Chain And Stakeholders To Successfully Realise The Aims Of This Challenging And Rewarding Scheme The Requirements Of The Scheme That Will Be The Responsibility Of The Successful Applicant Are Principally Captured In The Following Areas 1 Design And Construction Of The New WorksThe Schemes New Works Includes The Design And Construction Of The Civil Mechanical Electrical And Plumbing Mep Technology And Environmental Components Key Features Of The New Works Are Summarised Below Tunnel A Twin Bore Tunnel Approximately 2 Miles 3 3 Kilometers Long Beneath The Stonehenge World Heritage Site Including Tunnel Portals And Approach Structures Tunnel Service Buildings And Plant Rooms Tunnel Control System And Mechanical Electrical And Plumbing Systems Tunnel Boring Machine Design Manufacture Testing Shipping And On Site Assembly Carriageway Works Bridge Works To Form A Viaduct Over The River Till An Under Bridge For The B3083 A Flyover At The A345 Countess Roundabout And 4 Green Bridges Parsonage Down Accommodation Bridge Winterbourne Stoke Accommodation Bridge A360 Longbarrow Junction And Green Bridge No 4 Carriageway And Tunnel Technology Landscaping And Habitat Creation Extension Of Parsonage Down National Nature Reserve Protected Species Mitigation Measures Ensure Rights Of Way And Private Means Of Access Mainline Earthworks Utilities Works 2 Refurbishment Replacement And Modification Of Existing Assets There Are Works Required On Existing Assets Under The Current Ownership Of Both Highways England And Wiltshire Council Continued Engagement And Consultation Will Be Required With Both Parties Throughout The Design And Construction Phases For These Elements Including Existing A303 De Trunking Works Demolition Works And Site Clearance Works Modification Works To Existing Structures 3 Maintenance And Operation During ConstructionMaintenance And Operation Of The Existing A303 Within The Site Boundary Will Be Required For The Duration Of The Construction Works The Appointed Contractor Will Be Required To Liaise With Highways England Its Maintenance Contractors And Wiltshire Council To Coordinate Activities 4 Post Construction Maintenance PeriodThere Is An Extended Maintenance Period Minimum Of 5 Years Maximum Of 7 Years After Construction To Prove The Tunnel Performs As Intended Maintenance Is Included As Part Of This Period And The Contractor Will Be Responsible For All Elements Of The Infrastructure Associated With The Tunnel And Its Approaches The Appointed Contractor Will Be Required To Liaise With Highways England Its Maintenance Contractors And Wiltshire Council To Coordinate Activities And Tunnel Operations The Appointed Contractor Will Be Required To Fulfil The Duties Of Principal Designer And Principal Contractor Under The Construction Design And Management Regulations 2015 Time Limit For Receipt Of Tenders Or Requests To Participate Date 13 09 2019 Local Time 17 00
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