Heritage Impact Assessment Report for Feature No. 11SW-B/R93
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Agreement No. CE32/2004(GE) Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005- 2008 Programme) – Investigation, Design and Construction Heritage Impact Assessment Report for Feature No. 11SW-B/R93 (Sub- division 1), Duddell Street Report Ref: M45/200 Final | June 2013 Ove Arup & Partners Hong Kong Ltd This report takes into account the particular Level 5 Festival Walk instructions and requirements of our client. 80 Tat Chee Avenue It is not intended for and should not be relied Kowloon Tong upon by any third party and no responsibility is Kowloon undertaken to any third party. Hong Kong China arup.com Job number 24506/10 Document Verification Job title Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Job number Hong Kong Island (2005 – 2008 Programme) – Investigation, 24506/10 Design and Construction Document title Heritage Impact Assessment Report for Feature No. 11SW-B/R93 File reference (Sub-division 1), Duddell Street Document ref ARUP/HYD/(HY/2008/18)/M45/200/ Revision Date Filename Report.docx Final 19/06/13 Description Heritage Impact Assessment Report Prepared by Checked by Approved by Name Eric Chan Eddie Chan Albert Ho Signature Filename Description Prepared by Checked by Approved by Name Signature Filename Description Heritage Impact Assessment Report Prepared by Checked by Approved by Name Signature Filename Description Heritage Impact Assessment Report Prepared by Checked by Approved by Name Signature Issue Document Verification with Document Report Ref | Draft 1 | 6 October 2010 C:\...\DESKTOP\REPORT.DOCX Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005 – 2008 Programme) – Second Contract Heritage Impact Assessment Report Agreement No. CE32/2004(GE) Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005-2008 Programme) – Investigation, Design and Construction Heritage Impact Assessment Report for Feature No. 11SW-B/R93 (Sub-division 1), Duddell Street June 2013 Ove Arup & Partners Hong Kong Ltd Level 5, Festival Walk, 80 Tat Chee Avenue, Kowloon Tong, Kowloon, Hong Kong Tel +852 2528 3031 Fax +852 2268 3970 www.arup.com Report Ref | Draft 1 | 6 October 2010 C:\...\DESKTOP\REPORT.DOCX Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005 – 2008 Programme) – Second Contract Heritage Impact Assessment Report Report Ref | Draft 1 | 6 October 2010 C:\...\DESKTOP\REPORT.DOCX Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005 – 2008 Programme) – Second Contract Heritage Impact Assessment Report Contents Page 1. Introduction 1.1 Background of the Project ………………………………………….. 1 1.2 Brief and Objectives of the Report ……………………………….… 2 1.3 Proposed Upgrading/ Improvement Works ………………………… 3 1.4 Methodology ………………………………………………………… 5 1.4.1 Baseline Study ………………………………………………. 5 1.4.2 Impact Assessment ………………………………………..… 5 1.4.3 Mitigation Measures ……………………………………….... 6 1.5 Definitions …………………………………………………………… 6 2. Baseline Study 2.1 Desk-top Researches ………………………………………………… 10 2.1.1 History of the Duddell Street Steps and Gas Lamps ………... 10 2.1.2 Maintenance Responsibilities of the Declared Monuments … 12 2.1.3 Investigation on Disused Tunnels …………………………… 13 2.1.4 Vegetation in the Vicinity of the Heritage Site ……………… 15 2.1.5 Existing Utilities …………………………………………….. 15 2.2 Field Evaluation ……………………………………………………... 16 2.2.1 Field Evaluation on the Declared Monuments……………….. 16 2.2.1.1 Parapet Walls………………………………………16 2.2.1.2 Granite Stone Staircase…………………………… 17 2.2.1.3 Granite Stone Handrailings……………………….. 17 2.2.1.4 Gas Lamp…………………………………………. 18 2.2.1.5 Granite Masonry Blocks………………………….. 19 2.2.1.6 Storerooms underneath the Staircase……………... 19 2.2.2 Field Evaluation on the Existing Disused Tunnels…………... 20 2.2.3 Field Evaluation on the Adjacent Buildings…………………. 22 2.2.4 Field Evaluation on nearby Footpath/ Pavement…………….. 22 2.2.5 Field Evaluation on Existing Utilities on the Feature……….. 23 2.2.6 Field Evaluation on Existing Trees…………………………... 23 3. Assessment of Cultural Significance 3.1 Criteria of Assessment……………………………………………….. 25 3.2 Statement of Cultural Significance…………………………………... 25 3.2.1 Social Significance………………………………………….... 25 3.2.2 Historical Significance……………………………………….. 26 3.2.3 Architectural and Aesthetic Significance…………………….. 26 3.3 Possible Cultural Impact during the Construction Works…………… 26 3.4 Significance Features………………………………………………… 27 3.4.1 Assessment of Levels of Significances - Stone Steps………... 29 3.4.2 Assessment of Levels of Significances - Gas Lamps……….... 31 3.4.3 Assessment of Levels of Significances - Storerooms underneath the Staircase………………………………………………….. 32 3.4.4 Assessment of Levels of Significances - Disused Tunnels.... 34 Report Ref | Draft 1 | 6 October 2010 C:\...\DESKTOP\REPORT.DOCX Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005 – 2008 Programme) – Second Contract Heritage Impact Assessment Report 3.4.5 Assessment of Levels of Significances - Wall Trees……….... 36 4. Heritage Impact Assessment and Mitigation Measures 4.1 Context ………………………………………………………………. 37 4.2 Potential Impacts and Mitigation Measures on the Heritage Site …… 38 4.3 Potential Impacts on the Wall Trees ………………………………… 40 4.4 Potential Impacts on the Disused Tunnels Connecting Feature No. 11SW-B/R93 ………………………………………………………… 42 4.5 Potential Impacts on the Disused Tunnels Connecting Feature No. 11SW-B/R93 ………………………………………………………… 43 5. Implementation 5.1 Documentation ……………………………………………………… 45 Bibliography…………………………………………………………………... 45 Report Ref | Draft 1 | 6 October 2010 C:\...\DESKTOP\REPORT.DOCX Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005 – 2008 Programme) – Second Contract Heritage Impact Assessment Report Appendices Appendix A Slope Maintenance Responsibility Information System (SMRIS) Appendix B Site Location Plan and General Views of the Feature Appendix C Preliminary Designs Appendix D Sample of Similar Upgrading Works Feature Appendix E Aerial Photo Interpretation of the Feature Appendix F Repair Works at Duddell Street Stone Steps Appendix G Drawings of Disused Tunnels on Wyndham Street (Network No. 13) Appendix H Existing Utilities Information Appendix I Field Evaluation Photos Appendix J Part Plans and Photomontages of the Proposed U/I Works Report Ref | Draft 1 | 6 October 2010 C:\...\DESKTOP\REPORT.DOCX Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005 – 2008 Programme) – Second Contract Heritage Impact Assessment Report Report Ref | Draft 1 | 6 October 2010 C:\...\DESKTOP\REPORT.DOCX Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005 – 2008 Programme) – Investigation, Design and Construction Heritage Impact Assessment Report 1. INTRODUCTION 1.1 Background of the Project This Heritage Impact Assessment (HIA) Report for the proposed slope Upgrading/ Improvement (U/I) works at Feature No. 11SW-B/R93 (sub- division 1), Duddell Street is submitted on behalf of Highways Department (HyD) in accordance with the requirements as stipulated in the Technical Circular (Works) No. 6/2009 – Heritage Impact Assessment Mechanism for Capital Works Projects, issued by Development Bureau, HKSAR Government on 18 September 2009. Since 1 January 2008, Government projects which affect declared monuments, proposed monuments, sites and buildings graded by the Antiquities Advisory Board, recorded sites of archaeological interest and Government historic sites identified by the Antiquities and Monuments Office (AMO), except those specified, are required to conduct an HIA to assess impacts on historic/ heritage sites and buildings arising from the implementation of capital works projects so that their conservation will be given due consideration. As identified under the Agreement No. CE32/2004(GE) for the Upgrading/ Improvement of Roadside Slope/ Retaining Walls on Hong Kong Island (2005 – 2008 Programme) – Investigation, Design and Construction, HyD has proposed to enhance the stability of an existing retaining wall located adjacent and behind a “declared monument” – Duddell Street Steps and Gas Lamps which is situated at the end of Duddell Street and between Nos. 20-22 Ice House Street, namely Feature No. 11SW-B/R93. The maintenance responsibilities of Feature No. 11SW-B/R93 are divided into 2 portions – sub-division 1 and sub-division 2 which are maintained by HyD and Lot No. IL339C,RP respectively. Sub-division 1 will be upgraded under this Agreement and Ove Arup & Partners Hong Kong Ltd (Arup) is responsible for the site investigation, detailed design and supervision of the construction works. A 1:1000 Slope Maintenance Responsibility Information System (SMRIS) Plan obtained from Lands Department showing the Feature location, maintenance responsibilities and lot boundaries is presented in Appendix A for reference. The proposed U/I works involve backfilling the disused tunnels with rockfill material or the like, installation of soil nails, raking drains, construction of skin walls, installation of masonry facing and landscaping works for sub-division 1 of retaining wall Feature No. 11SW-B/R93 adjacent to the Duddell Street Steps and Gas Lamps. In accordance with memorandum reference LCS AM 53/6/21 dated 1 December 2009 addressed to the Chief Highway Engineer/ Works of HyD from the Director of Leisure and Cultural Services regarding the HIA Checklist, it is considered the heritage value of the Duddell Street Steps and Gas Lamps