Invitation For Prequalification For Rehabilitation And Expansion Of The Contador Hydropwer Plant And Access Road

Invitation For Prequalification For Rehabilitation And Expansion Of The Contador Hydropwer Plant And Access RoadThe Afap Intends To Prequalify Contractors For The Lot 1 Civil Works For The Rehabilitation And Extension Of The Contador Hpp In The Island Of Sao Tome Which Include The Following Works Component Work Description Main Work Quantities Preliminary Works Any Preliminary Works Needed To Achieve The Full Scope Of The Works Including The Rehabilitation Of The Existing Accesses Or The Creation Of New Ones Depending On The Contractor Methodology Intakes Design Modification4 Major Intakes Demolition Reconstruction With A Coanda Screen Or A Tyrolean Intake Sediment Trap Rehabilitation Of The Existing Sill 2 Minor Intakes Sediment Cleaning Creation Of A Sediment Trap Improvement Of The Guiding Wall For All Intakes Replacement Of The Gates Natural Hazard Mitigation Channel Modification Of The Channel Layout Underground Excavation As A Solution Toward Deep Landslides 3 Tunnels Expected Total Length Approx 1200 M Excavation Approx 15 000 M3 Systematic Shotcrete 11 000 M2 Reinforcement Bolts Steel Arches Etc If Needed Modification Of The Channel Section Natural Hazard Mitigation Along The Layout Channel Demolition And Reconstruction With New Dimensions Maximum New Section 1 2 M2 Formwork 21 000 M2 Concrete 7000 M3 Replacement Of The Flushing Gates Reinforcement Of The Existing Bridges Loading Chamber Increase Of The Storage Capacity Metallic Tank Dismantling Uphill Excavation And Reinforcement Reconstitution Of The Loading Chamber Merging The New Volume Created With The Existing One Waterproof Lining Excavation Approx 60 000 M3 For The Water Storage Needed Of 14 600 M3 Penstock Penstock Rehabilitation Sanding And Anticorrosion Painting Replacement Of Damaged Stretches Renovation Of The Concrete SaddlesPotential Asbestos Environment Joints And Painting To Be Confirmed In The Next Stage Of The Procurement Process Sanding And Anticorrosion Painting 2400 M2 Length Of Damaged Stretches Approx 200 M Powerhouse Interfaces With The Electromechanical Works Contract For Overequipment To 3 Mw Civil Works Related To The Replacement Of The Units In The Powerhouse And The Tailrace Channel Demolition And Reconstruction Adapted To The New Units And Sealing Of Fixed Parts Civil Works Related To The Replacement Of The Head Gate Including Its Wiring To The Powerhouse For Its Monitoring And Control Natural Hazard Mitigation Measure Around The Powerhouse And Access Roads The Work Site Is Located 5 Km Far From The Village Of Neves At The North West Part Of The Island Of S o Tom The Site Is Mountainous With Very Limited Access To The Channel And The Intakes Which Are At An Elevation Of 600 M Asl

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