Tenders Are Invited For Construction Work For Communication Lines – Horizontal Directional Drilling (Hdd-Verfahren) - Lanwin3

Construction Work For Communication Lines – Horizontal Directional Drilling (Hdd-Verfahren) - Lanwin3. The Transmission System Operators 50Hertz Transmission Gmbh And Tennet Tso Gmbh Concluded A Cooperation Agreement In December 2023 With The Intention Of Implementing Their Construction Projects, Which Are In Close Proximity To Each Other, As Part Of A Partnership. The Civil Engineering Services For The “Lanwin3” Project Also Fall Within This Framework. Both Partners Strive To Jointly Plan, Implement And Put Into Operation Future-Oriented And Innovative Dc Multi-Terminal (Hub) Systems In Germany. As Part Of The Cooperation Agreement, It Was Decided That Tennet Would Have The Civil Engineering Work Carried Out For Lanwin3 On Behalf Of 50Hertz And Hand Over The Turnkey Empty Pipe Or Cable Protection Pipe System To 50Hertz, Which Will Enable The Latter To Pull The Cable Into The Empty Pipe Or Cable Protection Pipe System. 50Hertz And Tennet Pursue The Common Goal Of Implementing All Necessary Measures Within The Specified Legal, Financial And Quality Framework And In Accordance With Recognized Rules Of Planning, Approval, Procurement And Construction. Tender Subject The Lanwin3 Project Includes The Construction Of A Cable Route Approximately 16 Km Long Between The Landing Point In Büsum And The Heide Land Station In Schleswig-Holstein. The Route Runs Parallel To The Lanwin2 Offshore Connection Project. As Part Of The Implementation Of The Lanwin3 Grid Connection System In Schleswig-Holstein, The Flood Protection System And Areas Particularly Worthy Of Protection (Seagrass Meadows) Near Büsum Stinteck (Schleswig-Holstein) Must Be Crossed. This Service Description Applies To The Creation Of The Lanwin3 Cable Protection Pipe Structures And The Work And Services Required In This Context. An Individual Contract Will Be Concluded Between Tennet Offshore Gmbh And The Bidder. The Lanwin3 System Is Implemented As A Direct Current Cable With A Voltage Level Of 525 Kv. In Addition To The Two Conductors, The Additional Laying Of A So-Called Metallic Return Conductor Is Necessary. Three Independent Horizontal Flushing Holes Must Be Drilled For The Three Cables. The Pe-Rt Cable Protection Pipes Drawn Into The Drilling Channels Are Each Assigned A Conductor. An Additional Fiber Optic Cable Is Pulled Into One Of The Three Cable Protection Tubes. Since, Among Other Things, The Open Construction Method Is Not An Option With Regard To The Stability Of The Dikes, The Crossing Is Planned Using The Horizontal Directional Drilling Method (Hdd Method For Short). In Order To Enable The Feasibility Of Carrying Out The Parallel Planned Projects Lanwin2 And Lanwin3 (A Total Of Six Hdd Boreholes) In 2027, Parts Of The Execution, Especially The Preparatory Measures For The Construction Of Access Roads And Be Areas, Must Take Place Further Ahead. This Work Should Be Carried Out In Spring 2027 (February / March) In Order To Gain Sufficient Time For Laying The Cable Protection Pipe. In The