Tenders are invited for Development Work On The Nékéwé Creek

Development Work On The Nékéwé Creek This Contract Includes In Particular: - A Reprofiling Operation Of The Access Track To The Site Over 3 Km With The Materials Cured And Covered With Respect To The Potential Risk Of Asbestos (7,500 M3) Including Crossing Structures (Cassis) Water Flows, - A Cleaning Operation At The Confluence Of The 2 Arms (Nékéwé And Yomaa) And In The Two Arms So As To Promote Deposits In The Downstream Sector Of The Confluence By Aiming For An Objective Of Average Longitudinal Slope 1.22%, Which Corresponds To The Current Probable Equilibrium Slope On The Section Of The Watercourse Downstream Of The Area. The Cumulative Linear Is Approximately 1200 M. The Proposed Abstraction Is Assessed At This Stage At A Volume Of Around 42,000 M³. The Cleaning Works Include: - Reinforcement By Pralination Of The Banks (3,110 M³). The Boulders, To Be Found On Site, Will Have A Minimum Size Of 400 Mm. No Additional Contribution Will Be Made. - The Recalibration Of Sections (3,252 M3) To Be Backfilled - An Operation To Evacuate And Store Materials, Off The Access Track, (28,000 M3) In 3 Sectors: O Platform 1 Located Near The Site ( Distance < 3 Km), Backfilling (17,000 M3) In The Area And Leveling Of 1,500 M3 Of Topsoil To Finish The Platform. This Platform Will Have Been Prepared Beforehand For Backfilling. Water Management Works Will Be Carried Out. O At The Level Of The Secondary Channels (4,000 M³) Located Near The Site (Distance < 1 Km) O At The Level Of The Nmc Stock Located Near The Site (Distance < 1 Km), 7,000 M3 Will Be Flattened On The Stock Of Laterites So As To Form A Sarcophagus About 1 M Thick And Avoid Any Pollution Of The Watercourse By Fines In The Event Of Flooding. - A Recalibration Operation (Conditional Tranche 1) Over 800 Ml At The Level Of The Nékéwé In Order To Slow Down The Erosion Of The Right Bank At The Level Of A Palm Forest - A Recalibration Operation (Conditional Tranche 2) Over 750 Ml At The Of The Moindah In Order To Slow Down The Erosion Of The Banks.