Potential Risks to Integration The principal risks are considered to be: · Delay to granting of required powers (hybrid Bill and Transport and Works Act Order) · Delay to/or misalignment of programme timelines · Changes to cost and programme commitments resulting from industry affordability and deliverability reviews · Complexity of Railway Systems interactions between HS2 and EWR2 HS2-EWR Integration GRIP 2 Feasibility Report 148476-NWR-REP-MPM-000003 Page 9 of 357 2 DEFINITIONS AND ABBREVIATIONS 2.1 Definitions The following definitions have been used throughout the text. Term Definition Base Scheme The scheme for HS2 contained in the hybrid Bill EWR2 Cross Network Rail generic cross section Section Network Rail proposed scheme for the East West Rail EWR2 Scheme project, Phase 2 HS2/EWR2 The scheme that would accommodate HS2 and EWR2 Integrated meeting the requirements of both railways Scheme Table 2 – Definitions 2.2 Abbreviations The following abbreviations and acronyms have been used throughout the text. Acronym Explanation AP Additional Provision ASPRO Asset Protection ATFS Autotransformer Feeder Site ATS Autotransformer Site CRD Client Requirements Document EMC Electromagnetic Compatibility EWR East West Rail EWR2 East West Rail Project Phase 2 GRIP Governance of Railway Investment Projects HS2/EWR2 The Integration Project at the interface of HS2 and EWR2 HS2/ HS2L High Speed 2/ High Speed 2 Limited IMD Infrastructure Maintenance Depot LoD Limits of Deviation MCJ Engineers Line Reference for the Marylebone Claydon (2,3,4) Junction Line NR Network Rail HS2-EWR Integration GRIP 2 Feasibility Report 148476-NWR-REP-MPM-000003 Page 10 of 357 Acronym Explanation OHLE / Overhead Line Equipment OLE ONW On Network Works OXD Engineers Line Reference for the Oxford to Bletchley line PDS Project Definition Statement PPA Protective Provisions Agreement Engineers Line Reference for the Princes Risborough to PRA Aylesbury line TWAO Transport and Works Act Order Waste management facilities in Calvert Green, WMF Buckinghamshire Table 3 – Abbreviations HS2-EWR Integration GRIP 2 Feasibility Report 148476-NWR-REP-MPM-000003 Page 11 of 357 3 INTRODUCTION 3.1 Background 3.1.1 This report concerns the interface of two railway projects, HS2 and EWR2. HS2 is a planned high-speed railway, Phase 1 of which will directly link the city centres of London and Birmingham. EWR is a planned upgrade of the existing conventional railway connecting East Anglia with central, southern and western England. 3.1.2 The geographical scope of Phase 2 the East West Rail project is as shown in Figure 1. Figure 1 – Geographical Scope of the East West Rail Phase 2 Project 3.1.3 HS2 has an interface with the existing Aylesbury to Claydon Junction line between Quainton and Calvert for a distance of approximately 8km. HS2 crosses the existing Oxford to Bletchley line near Calvert. 3.1.4 The alignment proposed for HS2 would sever the existing Aylesbury line in two locations south of Calvert and would sever the existing Oxford line where HS2 crosses at Calvert. These three severing points are shown in Figure 2. HS2-EWR Integration GRIP 2 Feasibility Report 148476-NWR-REP-MPM-000003 Page 12 of 357 Figure 2 – Conflict between the existing EWR and the proposed HS2 lines 3.1.5 To resolve these conflicts, prior to deposit of the hybrid Bill, HS2 developed a scheme that would accommodate the two railways. This comprised realignment of a section of the Aylesbury line to the east of its current position. It also involved raising the level of the Oxford line in the Calvert area and moving it northwards so that the HS2 line could pass below, unobstructed. 3.1.6 The schematic arrangement of the lines included in the hybrid Bill is shown in Figure 3. HS2-EWR Integration GRIP 2 Feasibility Report 148476-NWR-REP-MPM-000003 Page 13 of 357 Figure 3 – HS2 and East West Rail Arrangement at Calvert 3.2 Respective Application for Powers 3.2.1 Both projects are seeking powers to allow construction to begin. HS2 has submitted a hybrid Bill and is seeking Parliamentary approval while Network Rail is preparing an application for a Transport and Works Act Order. Although the development of HS2 through the hybrid Bill acknowledges and allows for EWR, the development of EWR to date does not acknowledge HS2. 3.2.2 Under the hybrid Bill HS2L will acquire powers to build the high speed railway and, in addition, that part of the Aylesbury Line in the limited area south of Calvert where it runs closest to HS2. Further south HS2 and the Aylesbury Line diverge, the space between them becoming less constrained. Powers for upgrade of the Aylesbury Line in this area are being sought through the Transport and Works Act Order, which is promoted by Network Rail. 3.2.3 Also under the hybrid Bill, HS2 has sought powers to build a section of the Oxford Line in the Calvert area on a realigned section to the north of the existing line. Acquisition of powers by the respective projects is shown in Figure 4. HS2-EWR Integration GRIP 2 Feasibility Report 148476-NWR-REP-MPM-000003 Page 14 of 357 Figure 4 – Acquisition of Powers 3.2.4 At the time of publication of this report (January 2016) the hybrid Bill is in its Parliamentary committee stages. Royal assent is planned for December 2016. The Transport and Works Act Order, promoted by Network Rail, is expected to be submitted in 2016. 3.3 Aylesbury Line – Accommodation by HS2 3.3.1 In the section north of Quainton, where the Aylesbury Line and the HS2 lines are at their closest, powers are being sought by HS2 through the hybrid Bill to move the Aylesbury Line eastwards to accommodate the high speed alignment. Because of physical features such as SSSI’s (Sheephouse Wood), landfills, etc. along the proposed railway corridor, the width available to accommodate both Railways is constrained. 3.3.2 The two projects are being developed separately and there is a risk that one will proceed to construction ahead of the other. Successive construction would be technically challenging given the constrained working corridor. Close proximity of adjacent lines would mean that construction of the re-doubled MCJ3 line would prove challenging next to an operational High Speed Railway. 3.4 Oxford Line – Accommodation by HS2 3.4.1 Also included in the Network Rail proposals for EWR is an upgrade of the Oxford Line. This line would cross above HS2 at Calvert and run adjacent to the proposed HS2 infrastructure maintenance depot. In the HS2-EWR Integration GRIP 2 Feasibility Report 148476-NWR-REP-MPM-000003 Page 15 of 357 hybrid Bill HS2L based its scheme on the understanding that this Network Rail upgrade would be operational at the time of HS2 construction. As such it sought powers to build an elevated section of the Oxford Line to the north of the existing alignment (offline) thus allowing the HS2 line to run beneath it. This arrangement allowed construction of the scheme without disturbing the operational Oxford Line. 3.4.2 It is now more likely that works for HS2 will precede EWR in the Calvert area. Consequently there may be no need for an offline re-alignment of the Oxford Line at Calvert. Confirmation through development of an integrated programme could yield a capital cost saving. 3.5 Geographical Definition of the HS2/EWR2 Interface Area 3.5.1 The geographical scope covers the proposed works at the interface between the HS2 and EWR2 projects. In terms of HS2 chainage and existing features this is as follows. Line Reference Limits From Quainton in the south to West Street bridge (HS2 Aylesbury Line chainage 71+500m to 81+500m), covering both HS2 and Aylesbury Line corridors From Charndon overbridge (carrying Main Street) in the west to existing Middle Claydon No. 8 footpath level Oxford Line crossing (near Queen Catherine Road) in the east, covering the Oxford line Table 4 – Geographical Limits of the Interface Area This area is shown in the following drawing extracts. Drawing Number Title C222-ATK-CV-DPP-020- Main Line Sheet 27 000008 Chainage 70+400 to 76+800 C222-ATK-CV-DPP-020- Main Line Sheet 28 000009 Chainage 76+800 to 83+200 Table 5 – Interface Area Drawing References Calvert and Quainton, as shown on the plans, are approximately 18km and 11km north west of Aylesbury respectively. HS2-EWR Integration GRIP 2 Feasibility Report 148476-PBR-REP-EMF-000002 Page 16 of 357 Figure 5 – C222-ATK-CV-DPP-020-000008 Extract from Main Line Sheet 27 Ch. 70+400 to 76+800 HS2-EWR Integration GRIP 2 Feasibility Report 148476-NWR-REP-MPM-000003 Page 17 of 357 Figure 6 – C222-ATK-CV-DPP-020-000009 Extract from Main Line Sheet 28 Ch. 76+800 to 83+200 HS2-EWR Integration GRIP 2 Feasibility Report 148476-NWR-REP-MPM-000003 Page 18 of 357 4 CURRENT STATUS OF THE TWO SCHEMES 4.1 EWR2 Scheme 4.1.1 The current scheme for the EWR2 project in the HS2/ EWR2 Interface Area does not consider HS2, i.e. EWR2 proposes to upgrade the existing infrastructure on the current MCJ and OXD alignments. It is defined on the 100000 series drawings in Appendix 2.2. They show the proposals for the OXD and the MCJ in the geographical area where HS2 and EWR2 would interface. 4.1.2 In order to deliver the NR requirements, a cross-section of the EWR2 twin track corridor with electrification was developed during the EWR2 feasibility stage. It is taken as a statement of NR’s spatial requirements along the OXD and MCJ corridors (i.e.