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National Transport Authority DART Expansion Project Four Tracking from West of Hazelhatch to Phoenix Park Tunnel

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National Transport Authority DART Expansion Project Four Tracking from West of Hazelhatch to Phoenix Park Tunnel National Transport Authority DART Expansion Project Four Tracking from West of Hazelhatch to Phoenix Park Tunnel Final Issue | 26 November 2018 This report takes into account the particular instructions and requirements of our client. It is not intended for and should not be relied upon by any third party and no responsibility is undertaken to any third party. Job number 254672-01 Ove Arup & Partners Ireland Limited 50 Ringsend Road Dublin 4 D04 T6X0 Ireland www.arup.com Document Verification Job title DART Expansion Project Job number 254672-01 Document title Four Tracking from West of Hazelhatch to Phoenix File reference Park Tunnel Document ref Revision Date Filename DART Expansion_Feasibility_Four_Tracking_to_PPT.docx D raft 05 Nov Description Draft 2018 Prepared by Checked by Approved by Shane McLoughlin Name Conor Lavery Peter Adams / Darragh Beirne Signature First Issue 13 Nov Filename DART Expansion_Feasibility_Four_Tracking_to_PPT.docx 2018 Description First Issue Prepared by Checked by Approved by Shane McLoughlin Name Conor Lavery Peter Adams / Darragh Beirne Signature Final Issue 26 Nov Filename DART Expansion_Feasibility_Four_Tracking_to_PPT.docx 2018 Description Prepared by Checked by Approved by Shane McLoughlin Name Conor Lavery Peter Adams / Darragh Beirne Signature Filename Description Prepared by Checked by Approved by Name Signature Issue Document Verification with Document | Final Issue | 26 November 2018 P:\DART EXPANSION\PH1-CONCEPT&FEASIBILITY\DART EXPANSION_10 YEAR PLAN\PHASE 1 STUDIES\KILDARE LINE STUDY\2018 11 29 FINAL DRAFT REPORT & DRAWINGS\EDITABLE DOC\DART EXPANSION_FEASIBILITY_FOUR_TRACKING_TO_PPT_UPDATED TABLE.DOCX National Transport Authority DART Expansion Project Four Tracking from West of Hazelhatch to Phoenix Park Tunnel Contents Page 1 Introduction 3 1.1 DART Expansion and National Transport Policy 3 1.2 Background 4 1.3 Extent of Study Area 6 1.4 Aims and Objectives of the Study 6 2 Review of Previous Studies 8 2.1 Overview 8 2.2 DART Underground Phase 1 8 2.3 DART Underground Phase 2 9 2.4 DART Underground Phase 3 12 2.5 DART Underground Western Tie-In Study 13 2.6 Summary 14 3 Data Collection and Available Surveys 15 4 Identification of Principal Impacted Assets 16 4.1 OB7 Le Fanu Road Bridge 16 4.2 OB5A Kylemore Road Bridge 16 4.3 CIÉ Inchicore Works 16 4.4 OB5 Khyber Pass Footbridge 18 4.5 UB4 – Sarsfield Road Underbridge 19 4.6 OB3 – Longmeadows Bridge 20 4.7 Retaining Walls and Signal Box on Heuston Approaches 21 4.8 Road Junction at Islandbridge 23 4.9 Heuston Station and Yard 26 4.10 UB01 Liffey Bridge and Viaduct 27 4.11 Phoenix Park Tunnel 28 4.12 OBO2 - Conyngham Road Overbridge 29 5 Track Alignment 33 5.1 Alignment Objectives 33 5.2 IÉ Track Design Standards 33 5.3 DART System Requirements 33 5.4 Track Design Speeds and Horizontal Geometry Requirements 34 5.5 Track Cant 35 5.6 Vertical Track Geometry 37 5.7 Horizontal and Vertical Geometry at Stations 40 5.8 Track and Structure Clearances 40 | Final Issue | 26 November 2018 P:\DART EXPANSION\PH1-CONCEPT&FEASIBILITY\DART EXPANSION_10 YEAR PLAN\PHASE 1 STUDIES\KILDARE LINE STUDY\2018 11 29 FINAL DRAFT REPORT & DRAWINGS\EDITABLE DOC\DART EXPANSION_FEASIBILITY_FOUR_TRACKING_TO_PPT_UPDATED TABLE.DOCX National Transport Authority DART Expansion Project Four Tracking from West of Hazelhatch to Phoenix Park Tunnel 5.9 Rolling Stock 44 5.10 Further Alignment Work Required 44 5.11 Potential Options for Future Development of the Alignment 45 6 Options Considered throughout the Study 46 6.1 Potential Kylemore Road Station 46 6.2 Islandbridge Junction Approach 46 6.3 OBO2 Conyngham Road Bridge 54 6.4 FFSS vs SSFF up to Hazelhatch and Track Amendments 55 7 Description of Emerging Preferred Option 60 7.1 Horizontal Track Design 60 7.2 Vertical alignment Design 61 7.3 Horizontal and Vertical Alignment Combinations 62 7.4 Applied Cant and Speed Assessment 63 7.5 Bridge Structures along the Alignment 64 7.6 Kylemore Road Station 67 7.7 Retaining Walls 67 7.8 Track alignment through the Inchicore Works 68 7.9 Property 69 7.10 Civils Design 69 8 Feasibility Working Cost Estimate 70 8.1 Basis of Cost Estimate 70 8.2 Feasibility Working Cost Estimate 70 9 Conclusions and Recommendations 72 9.1 Aims and Objectives 72 9.2 Options Assessment 72 9.3 Feasibility Working Cost Estimate 72 9.4 Recommendations 73 Appendices Appendix A Basis of Design - Electrical Pantograph Clearance Envelopes Appendix B Four Tracking Speed Study Appendix C DART Expansion - Kildare Line - Alignment Calculations | Final Issue | 26 November 2018 P:\DART EXPANSION\PH1-CONCEPT&FEASIBILITY\DART EXPANSION_10 YEAR PLAN\PHASE 1 STUDIES\KILDARE LINE STUDY\2018 11 29 FINAL DRAFT REPORT & DRAWINGS\EDITABLE DOC\DART EXPANSION_FEASIBILITY_FOUR_TRACKING_TO_PPT_UPDATED TABLE.DOCX National Transport Authority DART Expansion Project Four Tracking from West of Hazelhatch to Phoenix Park Tunnel Appendix D Feasibility Working Cost Estimate Breakdown | Final Issue | 26 November 2018 P:\DART EXPANSION\PH1-CONCEPT&FEASIBILITY\DART EXPANSION_10 YEAR PLAN\PHASE 1 STUDIES\KILDARE LINE STUDY\2018 11 29 FINAL DRAFT REPORT & DRAWINGS\EDITABLE DOC\DART EXPANSION_FEASIBILITY_FOUR_TRACKING_TO_PPT_UPDATED TABLE.DOCX National Transport Authority DART Expansion Project Four Tracking from West of Hazelhatch to Phoenix Park Tunnel Executive Summary DART Expansion was initially conceived in the early 1990’s as a scheme to expand the capacity of the electrified commuter network in the greater Dublin area in response to the increasing commuter passenger numbers. Design of the initial scheme linking all the lines through an underground tunnel link beneath the city centre was progressed and a Railway Order was made by An Bord Pleanála in December 2011 and perfected by the High Court in March 2014. However, in September 2015 the Government deferred authorisation for construction of DART Underground and instructed Iarnród Éireann to examine the current design with an objective of delivering a lower cost technical solution, whilst retaining the required rail connectivity for the DART Expansion Programme. The assessment review, including transport benefits modelling carried out by Iarnród Éireann and the NTA in 2016 and 2017 concluded that: DART Expansion with DART Underground offers the greatest benefits; Other network arrangement scenarios focused on delivering non-tunnel city centre capacity enhancements, with integration through the Phoenix Park Tunnel, allow early delivery of service capacity and met projected passenger demand in the short to medium term at a lower cost. This short to medium term non-tunnel DART Expansion network was included in the National Development Plan 2018-27 but noted that a DART Underground Tunnel alignment would be protected for potential future development. This decision requires alteration to the Kildare Line previously designed with the tie-in through the DART Underground tunnel from Inchicore. This Study reviews the options to tie-in the Kildare Line to the DART Expansion scheme connecting to the Phoenix Park Tunnel, in a manner which does not impede development of a DART Underground in the future. The current assessment has taken account of previous studies, including the DART Underground design and a subsequent Western Tie-In study carried out as part of the 2016 and 2017 DART Expansion review. The ultimate purpose of this Study is to review and co-ordinate all studies in light of the revised DART Expansion network and to recommend an integrated solution covering the immediate requirements of the DART Expansion with provision to allow future development of the DART Expansion. The key features of the review contained herein are to review options to complete the four tracking from its existing limit near Park West / Cherry Orchard into Heuston (previously incomplete due to the tie-in to the proposed DART Underground) and co-ordinate the alignment with the tie-in to the Heuston Yard and the Phoenix Park Tunnel in the East, and the existing four track to Hazelhatch in the West. | Final Issue | 26 November 2018 Page 1 P:\DART EXPANSION\PH1-CONCEPT&FEASIBILITY\DART EXPANSION_10 YEAR PLAN\PHASE 1 STUDIES\KILDARE LINE STUDY\2018 11 29 FINAL DRAFT REPORT & DRAWINGS\EDITABLE DOC\DART EXPANSION_FEASIBILITY_FOUR_TRACKING_TO_PPT_UPDATED TABLE.DOCX National Transport Authority DART Expansion Project Four Tracking from West of Hazelhatch to Phoenix Park Tunnel This co-ordination includes the effects of changing the future track operational configuration from DART Lines on the north side of four tracking in the Phoenix Park Tunnel solution to DART Lines on the south side of four tracking in a DART Underground solution. The revised options include a station at Kylemore in lieu of the previous proposal for an Inchicore Station and different overbridge and structural solutions than those previously considered. This Study has concluded with a recommended solution to meet these requirements. | Final Issue | 26 November 2018 Page 2 P:\DART EXPANSION\PH1-CONCEPT&FEASIBILITY\DART EXPANSION_10 YEAR PLAN\PHASE 1 STUDIES\KILDARE LINE STUDY\2018 11 29 FINAL DRAFT REPORT & DRAWINGS\EDITABLE DOC\DART EXPANSION_FEASIBILITY_FOUR_TRACKING_TO_PPT_UPDATED TABLE.DOCX National Transport Authority DART Expansion Project Four Tracking from West of Hazelhatch to Phoenix Park Tunnel 1 Introduction 1.1 DART Expansion and National Transport Policy In September 2015, the revised Business Case for the DART Expansion Programme was published, and the Minister for Transport, Tourism and Sport Paschal Donohoe TD announced
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