Tenders Are Invited For Architectural, Engineering And Planning Services – Engineering Services For Hydraulic Renovation And Road Drainage Through The Mayschuss Town Road

Architectural, Engineering And Planning Services – Engineering Services For Hydraulic Renovation And Road Drainage Through The Mayschuss Town Road. 1. Hydraulic Renovation Of Sewers In July 2021, The Ahr Valley Was Hit By The Devastating Flood Disaster. As A Result, The Canal System In The Local Community Of Mayschoß Was Damaged. This Tender Concerns Parts Of The Combined Sewer In Ahr-Rotweinstrasse (B267), Bungertstrasse And Waagstrasse. To Determine The Hydrodynamic Performance Of The Existing Sewer Network, The Engineering Firm S. Kampf Was Commissioned To Create And Calculate A Sewer Network Model. This Has Shown That The Canal System Is Partly In Poor Hydraulic Condition And Requires A High Level Of Hydraulic Renovation (See Ibsk Report In Annex 6.2). Different Scenarios Were Considered In The Calculations For Hydraulic Renovation. For The Renovation Measures, The Wastewater Works Decided To Use The Scenario Without An External Area. This Shows That 29 Sections Of The Sewer Network Require Hydraulic Renovation Through Dimensional Expansion (See Ibsk Report, Appendix 6.2 (Report Table 8, P. 36); Note: Sections 4999901005 And 4999010010 (Last Two Lines) Belong To The Auelsbach Stream Piping And Are Not Part Of This Tender). Of These, 23 Are Located On Ahr-Rotweinstrasse (B267), Five On Waagstrasse And One On Bungertstrasse. The Dimension Extensions Vary Between Dn400 And Dn900. The Section Of The Sewer To Be Renewed Along The Ahr-Rotweinstrasse (B267) Runs From Lochmühle To Waagplatz And Is Approx. 900M Long. The Sections To Be Renewed In Bungertstrasse And Waagstrasse Have A Total Length Of Approx. 100M. There Is An Overview Map In Appendix 6.1. Approximately 45 Connection Lines That Are Classified As Condition Class 2 Or Worse Are Also To Be Rebuilt. The Approximately 30 Street Drains Included Here Are To Be Connected To The Newly Built Street Drainage Canal (See 1.2.2) In The Future. The Remaining House Connection Lines Must Be Partially Replaced. In Addition, Around 30 Shaft Structures Dn1000 To Dn1500 Need To Be Replaced. (See Ibsk Report Appendix 6.2 (Appendices 19+20)) The Wastewater From Mayschoß Flows As Mixed Water In The Gravity Drain To A Storm Overflow Basin (Rüb) And Is Then Throttled To The Temporary Mobile Mayschoß Sewage Treatment Plant. Due To The Hydraulic Expansion, The Inflow Volumes To The Rüb Increase. Therefore, The Quantities Discharged Into The Ahr, Which Are Deducted At The Rüb, Must Be Recalculated. The New Discharge Quantities Must Be Re-Applied For To The Upper Water Authority (Sgd Nord) As Part Of A Water Permit. According To The Current State Of Knowledge, The Rüb Itself Does Not Need To Be Converted And Is Therefore Not Part Of This Tender As Part Of The Hydraulic Expansion Of The Sewers. Since The Work Is Taking Place Near The Ahr, Water Law Approval Is Required