The Bridges of Melbourne City
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CITY SERVICES, COMMUNITY AND Agenda Item 3.6 CULTURAL DEVELOPMENT COMMITTEE REPORT 11 November 2003 THE BRIDGES OF MELBOURNE CITY Division City Assets & Services Presenter Gordon Duncan, Acting Group Manager Engineering Services Purpose 1. This report presents a Bridge Management Plan for approval. Background 2. Bridges owned by the City of Melbourne represent a major asset group. A number of the bridges are over 100 years old and effective asset management is important. They are an intensively used part of the road management network and operate within a road environment where load standards are constantly changing. 3. The Bridge Management Plan puts forward a five-year financial plan and includes indicative costings for the following five years. Issues Current Bridge Condition 4. The City of Melbourne has established a five-tier condition rating. The rating is: 4.1. Excellent (a rating of 5): new, or in as-new condition. No change to surveillance schedule; 4.2. Good (a rating of 4): acceptable condition. No change to surveillance schedule; 4.3. Fair (a rating of 3): bordering on intervention level. Bring forward next scheduled surveillance; 4.4. Poor (a rating of 2): at intervention level; and 4.5. Hazard (a rating of 1): presents a hazard to person property or the environment. Immediate containment. 5. The current bridge condition is rated as good except for Arden Street Bridge and Princes Bridge which are rated at between 2 and 3. Ameliorative works are planned. Load Assessment 6. New Victorian Government load ratings have recently been established. In response to the new ratings, a load assessment and strengthening policy has been established and most of the bridge stock has undergone this load assessment process. As a result of the load assessments, strengthening works have been programmed for Princes Bridge, Queens Bridge (subject to further testing), Arden Street and Macaulay Road bridges. Financial Management Issues 7. In the current financial year, Council has budgeted for expenditure of $2.8M. Much of this funding has been allocated to works on Princes Bridge and a higher than usual bridge inspection regime. Under the Bridge Management Plan, expenditure in year two is also expected to be high at $2.017M as urgent works are continued to Princes Bridge. 8. Details of other structural repairs and inspection and testing costs are listed in Appendix B. Subject to annual review, no further major, single item expense is expected on bridges in the next nine years. It is also essential that adequate funding for on-going maintenance and minor repairs be allocated annually. The Bridges Plan recommends an annual allocation of $100,000 recurrent funding for minor maintenance and repairs. Stakeholder Management Issues 9. Since 1998, the Victorian Government has constructed four footbridges in the sports and entertainment precinct. In each case, the State Government has asked the City of Melbourne to assume management of the bridge. Council recently resolved not to assume management responsibility for the proposed Birrurung Marr footbridge to the MCG. Negotiations are currently taking place regarding the future management of Sandridge Bridge. The Bridge Management Plan proposes that Council develop criteria to guide future decision-making in this area. These criteria will make clear the conditions under which Council may assume management of a bridge or an aspect of its management. The Plan proposes that as a general principle, Council should not assume responsibility for major repairs/ refurbishment or any works of a structural nature. Consultation 10. Consultation has been undertaken with VicRoads and the Department of Infrastructure. Finance 11. Council has allocated $2.8M in the current financial year for bridge repair and maintenance. The Bridges Plan recommends the allocation of $100,000 per annum recurrent funding for minor repairs and maintenance. Legal 12. No direct legal issues arise from the recommendation in the report. The subject matter of the report and the recommendation are within the functions and powers of the Council. Sustainability Connected and Accessible City 13. City Plan 2010 notes the need to: “ensure a sustainable and highly integrated transport system services City needs and links key assets”. 2 Inclusive and Engaging City 14. City Plan 2010 notes the need to: “attract, facilitate and maximise benefits of major City events and festivals” and “enhance the quality of the existing public and private built form”. Recommendation 15. That the City Services, Community and Cultural Development Committee: 15.1. endorse the Bridge Management Plan 2003-2008 entitled ‘The Bridges of Melbourne City’; and 15.2. note that this decision is being made by the Committee under delegation from the Council and is subject to the referral notice process. Attachment: 1. The Bridges of Melbourne City: A Bridge Management Plan 2003-2008 3 Attachment 1 Agenda Item 3.6 City Services, Community and Cultural Development Committee 11 November 2003 The Bridges of Melbourne City A Bridge Management Plan 2003 - 2008 BRIDGE MANAGEMENT PLAN – 1285636 V2 – ENGINEERING SERVICES GROUP Executive Summary The City of Melbourne is responsible for 13 bridges within the City’s boundary, ranging from footbridges to heritage listed bridges such as Princes Bridge. The condition of some of these bridges is deteriorating and asset management planning is required to maintain and enhance their current condition into the future. The City of Melbourne has introduced a bridge management database known as BridgeAsyst to guide the programming of strengthening and general maintenance on bridges under its management. Detailed inspections have been undertaken on all bridges and this information is being loaded into the database for assessment. By utilising the risk assessment processes within the bridge management database, bridges with an Overall Bridge Condition (OBC) below or close to target and components of other bridges with high-risk scores can be identified. The Bridge Management Plan includes a five-year implementation plan setting out scheduling of major repair/maintenance works, inspections and load assessment plans. Budget estimates have been included. The Plan also discusses the need to further engage with other stakeholders involved in the management of bridges such as Heritage Victoria, VicRoads, VicTrack and neighbouring councils whose requirements/responsibilities need to be discussed. BRIDGE MANAGEMENT PLAN – 1285636 V2 – ENGINEERING SERVICES GROUP 2 Introduction 1. Bridges are an important component of the City of Melbourne’s intensely used road network. They provide access and amenity for vehicular and pedestrian traffic. Bridges are subject to natural deterioration and operate within a road environment where load standards are constantly changing. Many of the major bridges are over 100 years old. An effective asset management regime is essential to the systematic strengthening and maintenance of bridges. 2. The Council is responsible for 13 functional bridges within the boundary of the City of Melbourne. This does not include Sandridge Bridge which currently has no functional use or Farnsworth Bridge which is predominantly managed by VicRoads. Careful planning is required if the condition of bridges is to be maintained and enhanced. The purpose of this document is to set out a 5-year Bridge Management Plan that enhances the management of the City of Melbourne’s bridges stock by: 2.1 Determining the appropriate bridge maintenance, repair and strengthening regime, 2.2 Establishing an asset management system to guide decision-making. This work, in progress, will provide an assessment of the structural condition of bridges, quantify current and projected deterioration and provide detailed maintenance options. 3. Implementation plans are attached for the five-year financial year period - 2003/04 to 2007/08. A Bridge Condition Rating 4. The City of Melbourne has established a five-tier condition rating. The rating is: 4.1 Excellent - a rating of 5. New, or in as-new condition. Requiring no change to surveillance schedule, 4.2 Good - a rating of 4. Acceptable condition. No change to surveillance schedule, 4.3 Fair - a rating of 3. Bordering on intervention level. Bring forward next scheduled surveillance), 4.4 Poor - a rating of 2. At intervention level. 4.5 Hazard - a rating of 1. Presents a hazard to person property or the environment. Immediate containment. 5. The rating is derived from a risk assessment process whereby a score of 1 to 5 is given to every major component of every bridge using level 2 inspection data. These risk scores are aggregated to estimate the Overall Bridge Condition (OBC) of each structure. Details of bridge condition of City of Melbourne bridges are detailed on the following page. BRIDGE MANAGEMENT PLAN – 1285636 V2 – ENGINEERING SERVICES GROUP 3 Objectives 6. The following objectives are applicable to the Bridge Management Plan: 6.1 All bridges must safely carry appropriate traffic including pedestrians, cyclists and motorists, 6.2 A system of inspection and repair, which ensures structural integrity, sustainability and safety of the bridge stock will be maintained. 7. The following specific objective is applicable to the Bridges Management Plan: 7.1 No bridge shall have an Overall Bridge Condition (OBC) less than three without special management actions in place to mitigate and reduce the risk. 8. Council currently accepts responsibility for eight road bridges and five pedestrian bridges. A brief description of