Option Selection Report Version 1 Project Name: Crossrail Step Free Access Hanwell Railway Station OP Reference: 317520/MMRA/WO023/0002 Sponsor/Client: Crossrail Project Manager: Ref: 317520/MMRA/WO023/0002 Version: 01 Date: 19/12/2013 Contents 1 EXECUTIVE SUMMARY 1 2 OPTIONS REPORT & CONCEPT DESIGNS 2 2.1 Selected Option 3 2.1.1 Description of the Preferred Option 4 2.2 Discarded Options 6 2.2.1 Viable Options 6 2.2.2 Options Considered but not Classed as Viable 6 2.3 Constructability Assessment 6 2.4 Access and Possession Strategy 7 2.5 Project Schedule 8 2.6 Whole Life Cost Assessment of Options 8 2.7 Estimates (excluding whole life costings) 9 2.8 QRA 9 2.9 Risk Register 9 2.10 Assumptions 9 2.11 Signed Design Compliance Certificate 9 2.12 Asset Condition Surveys / GI / Topographical 9 3 INTERFACES WITH OTHER PROJECTS 9 4 CDM INFORMATION 10 5 SAFETY VERIFICATION RECOMMENDATIONS 11 6 CONSENTS STRATEGY 11 7 ENVIRONMENTAL IMPACT ASSESSMENT 11 8 MAINTENANCE AND OPERATIONS STRATEGY 11 9 ENGINEERING OUTPUTS 12 10 CONCLUSION AND RECOMMENDATIONS 12 11 FORMAL ACCEPTANCE OF SELECTED OPTION BY CLIENT, FUNDERS AND STAKEHOLDERS 13 APPENDICES 14 Ref: 317520/MMRA/WO023/0002 Version: 01 Date: 19/12/2013 APPENDICES A. Information received B. Description of accessible route C. Listing of works required D. Photos E. Drawings F. Risk register G. Information required H. Hazard log I. Investigation reports / summaries J. Ref: 317520/MMRA/WO023/0002 Version: 01 Date: 19/12/2013 Issue Record Issue No Brief History Of Amendment Date of Issue 00 Draft Issue 13/12/2013 01 First Issue 19/12/2013 Distribution List Name Organisation Issue No. Ref: 317520/MMRA/WO023/0002 Version: 01 Date: 19/12/2013 1 Executive Summary This option selection report provides a solution to providing an accessible route with step free access to all platforms at Hanwell Station. The preferred solution is to build a footbridge with lifts to all platforms and emergency exit stairs from bridge level to platform 3. The lift will have 2No. lifts: Platform 3: Three floor lift serving street level, platform 3 and footbridge level. Network Rail standard 16 person car through car used. Platforms 1/2: Two floor lift serving footbridge and platforms 1/2. Single side entry car, Network Rail standard 16 person. The proposed works have been considered with respect to all relevant disciplines. The resulting recommendation thus provides a step free access route with minimal modification of the existing station infrastructure and reasonable maintenance costs. There are no major issues or abnormal risks anticipated with the construction of the new bridge. The estimated scheme cost is Page 1 of 13 Ref: 317520/MMRA/WO023/0002 Version: 01 Date: 19/12/2013 2 Options Report & Concept Designs Study Scope This Option Selection Report considers how step free access can be provided to the platforms at Hanwell Railway Station. This station is located on the Great Western Mainline some 10 miles west of London at ELR MLN1 7 miles 28 chains, where the railway is running on an embankment. Location Plan Source: Google Earth - Licence number JCPMKDSJZFMCABS This Option Selection Report covers the following areas:- Civil and structural engineering Planning and aesthetics Mechanical & Electrical engineering Lift requirements and specification Telecoms Signal sighting Environmental matters Other railway systems and services Page 2 of 13 Ref: 317520/MMRA/WO023/0002 Version: 01 Date: 19/12/2013 Other planned projects at the station Buildability Outline costings Applicable Design Criteria This study considers how an “accessible route” can be provided through the station to the platforms. The following key documents define the criteria for the accessible route:- The DfT document: “Accessible Train Station Design for Disabled People: A Code of Practice” Date of issue November 2011 Network Rail Standard: NR/SP/ELP/27228 “Specification for new and upgraded lifts” Date of issue October 2005 The European Union document “Technical Specification for Interoperability: Accessibility for Persons of Reduced Mobility” (Will be met by observing Dft code of practice) The start point for the accessible route is taken to be from any drop off point for disabled passengers adjacent to the station entrance. At this station, there is only a single entrance from the adjacent road network and a single available route to the platforms. The end point of the accessible route is all usable platforms, including those not scheduled for use under normal service patterns but which may be used under perturbed service conditions or during emergency scenarios. At Hanwell Station, Platforms 2 & 3 are used by stopping trains and serve the relief down and up line respectively, whilst Platform 1 serves main fast up lines and provides access to stopping trains during perturbed services only. As part of a separate scheme being undertaken by Network Rail, Platform 1 will be closed off during normal service by locked gates and separating platform fencing. The down main line is not served by a platform but passes through the back of the station. The train to platform interface and means of boarding or alighting trains is not covered by this study. The basic requirements of an accessible route are that it shall be:- step free &/or have ramps of restricted gradient and length meet requirements for minimum width have appropriate non slip finishes have adequate signage be lit to appropriate levels be free of constraints and obstacles This study does not address the provision or suitability of other facilities at the station for persons of reduced mobility, beyond the basic provision of the accessible route. Items such as ticket sales facilities, waiting provision and customer information systems, etc are not considered in any detail & are not assessed for compliance with the relevant requirements. 2.1 Selected Option At present the platforms can only be accessed via a subway from Campbell Road to the north of the railway, access to the subway is up 2No. shallow steps and then access to each platform is up 34No. steps. A small ticket office is located within the subway entrance adjacent to the Platform 3 stairwell, and there is a ticket vending machine on the pavement to the left of the station entrance. It is understood that future provision of tickets will be at Page 3 of 13 Ref: 317520/MMRA/WO023/0002 Version: 01 Date: 19/12/2013 platform level, and as such step free access to the existing ticket office and full accessible use of the existing ticket vending machine is not required. The preferred option for this station is to install a bridge structure with associated lift shafts to the east of the station building. There is adequate space to accommodate Network Rail standard 16 person lifts. This will provide the accessible route to all platforms. The principle access route to the platforms will remain through the existing subway and stair access. It is understood that alterations to the subway are being made under a different scheme, which includes reopening of the south entrance to the subway and regrading the station entrance to avoid stepped access. These works are not considered in this study. From a visual inspection there are no anticipated structural issues with installing the proposed footbridge and lifts, however further consideration for the substructure design will be required during the detailed design process. The lift shaft will provide direct support for the bridge structure. Additional columns may be required on Platform 1/2 due to the offset location of bridge and lift shaft. Passive provision for a further bridge span can be included within the detailed design of the structure. Separate lift motor rooms will be required for both lift shafts included within this selected option. The rooms are to be located a maximum of 10m away from the lift shaft. It may be possible to use the existing ticket office at the station entrance to provide a lift motor room. Alternatively a small structure will be required next to the lift shaft. A separate structure will be required to house the lift motor room on Platform 1/2. This will be located away from the lift shaft as a standalone structure. Due to the listed status of the station, planning restrictions are in place and the design should be in accordance with Local Authority and Railway Heritage Trust views. The proposed option reflects the consultation process undertaken by Crossrail, in conjunction with Tony Meadows Associates with London Borough of Ealing Council. Further discussion, with the Local Authority will be required to confirm visual appearance of the final solution. The design of the bridge will also require restricting the view from the bridge over adjacent houses. The selected option does not pose any significant issues for signal sighting. Following our desk study, there are no anticipated geotechnical issues with excavation or new foundations at the station however further investigation is required prior the next phase of design. It is anticipated that the lift shaft and pits will be founded on piles. Design of the substructure will be dependent on the form of the superstructure selected during detailed design. There will be works to upgrade the existing electrical supply and distribution systems at the station, including some re-design of other proposed Crossrail station enhancement works which have not yet been constructed. In addition, the telecommunications and lighting systems will need to be integrated with the footbridge. Minor enhancements to retained access routes may include resurfacing to achieve a suitably level and slip resistant finish. Areas for temporary site facilities and access for construction equipment are limited at Hanwell Station. It is proposed that a compound area be erected north of the station building for a site office and welfare facilities.