volume 1 - Halifax Regional Municipality

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Halifax Water Integrated Resource Plan Appendices 4.1.6 Basic Assumptions and Plan Considerations TOR Requirement 1. IRP process will identify basic assumptions used for supply-side and demand-side options and system impacts related to aging infrastructure, capacity issues, regulatory compliance, and growth. These will be documented together with the proposed resource plans. 2. IRP process will develop and document appropriate level of reinvestment by each asset class (options may include conventional dig and replace as well as in-situ repairs and lining and other trenchless techniques). 3. IRP process will document opportunities to rationalize operational practices. 4. IRP process will identify system and facility upgrades needed to comply with the CCME Wastewater Regulations, anticipated sometime in 2012. IRP Reference Sections 4 and 5.6 Volume 1 Appendix F Volume 3 Appendices C and D Volume 1 Appendix F Volume 3 Appendix D Sections 7.6 and 7.7 Section 4.3.2 Basic assumptions regarding future requirements are presented in Section 4 for all three drivers. The assumptions surrounding asset renewal are provided in Volume 1 Appendix F and Volume 3 Appendix E. Costing assumptions are presented in Volume 3 Appendix C. Financial modeling assumptions are provided in Section 5.6. The Enhanced Asset Renewal program is presented in Volume 1 Appendix F and in Volume 3 Appendix E. As a result of the IRP, Halifax Water is considering consolidating its system planning into comprehensive master plans, which along with other planning activities feed into the IRP. The concept is illustrated in Figure 7.3, Halifax Water IRP Planning Overview. Table 7.5, Halifax Water Master Planning summarizes the proposed master planning initiatives and gives their relationship to other existing and proposed planning programs and projects. One of the IRP outcomes was the presentation of the 14 IRP planning objectives. Some of these objectives are linked to current Halifax Water LOS. Table 7.7, Recommended LOS Updates or Additions presents a series of recommendations for updating/expanding the current LOS to allow a full evaluation of program implementation. The updated/expanded LOS once developed will require support for LOS monitoring, data analysis and reporting. Halifax Water will need to consider the impact on operating staff for this additional data collection, analysis, and reporting. The three HHSP facilities will require upgrades to meet the recently promulgated federal Wastewater Systems Effluent Regulations (WSER). Halifax Water has recently completed a risk assessment indicating that under the WSER, all three facilities will be required to upgrade to full secondary treatment. Halifax and Dartmouth WSER upgrades were deemed to require upgrade within 20 years and Herring Cove with 30 years; however, with the RWWFP redirecting flows to the Herring Cove WWTF, it will require upgrade to a medium facility, thus requiring an upgrade to secondary within the 20 year IRP planning horizon. Revision: 2012-10-29 Integrated Resource Plan –Appendices G-18 October 31 2012 Page 230 of 272
Halifax Water Integrated Resource Plan Appendices TOR Requirement 5. IRP process will use growth projections and system information and forecasts to plan for future growth related assets. IRP Reference Section 4.2 Volume 1 Appendix D Growth is one of the key IRP drivers. All three infrastructures will need to meet future growth demands. Specific growth related projects are listed in Objectives 13 and 14 of the IRP financial plan. Growth requirements for the water and wastewater system are detailed in Section 4.2.1 and the stormwater system is detailed in Section 4.2.2. HRM provided a range of growth projections for use by the IRP project team. Based on the midrange those projections the following growth estimates were developed and applied to the IRP and the RWWFP: Residential growth to 2046 – 159,240 persons. Employment area growth to 2046 – 698.1 ha. The locations of planned growth are provided in Volume 1 Appendix D in the IRP maps. 4.1.7 Resource Plans Development and Integration TOR Requirement 1. IRP resource plans will be evaluated based on system safety and reliability requirements. 2. IRP resource plans will be evaluated based on robustness of the plan (i.e. sensitivity of the plan to possible variations in the key assumptions). 3. IRP resource plans will be evaluated based on plan resilience (i.e. degree to which the selection of the preferred plan constrains Halifax Water’s future planning options). IRP Reference Section 5.5 Volume 1 Appendix F Sections 5.0 and 6.3 Sections 5.0 and 6.3 IRP Objective 9 addresses the need to enhance reliability of critical water and wastewater assets. Timeframe to implement the water and wastewater system security program is based on Halifax Water’s Five Year Capital Plan. An asset component-by-component risk analysis was conducted to determine the optimal levels of asset renewal for each component. This was the second stage of the asset renewal program analysis and was undertaken for the intermediate plans creating a single optimized component asset renewal strategy. Volume 1 Appendix F presents the results of the water, wastewater and stormwater asset risk analysis. See ToR # 54, 51, 42 and 35. See above. Revision: 2012-10-29 Integrated Resource Plan –Appendices G-19 October 31 2012 Page 231 of 272
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FINAL 1 2 3 4 5 6 7 10 13 16 17 18
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Page 229: Halifax Water Integrated Resource P
Page 239 and 240: Recommended Alternative Resource Pl
Page 241 and 242: Financial Model 40-4 Halifax Water
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Page 245 and 246: Financial Model 40-4 1.028 Cavalier
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Page 249 and 250: Financial Model 40-4 2.075 Beaver C
Page 251 and 252: Financial Model 40-4 2.848 Storage
Page 253 and 254: Summary of Capital, Operational and
Page 263 and 264: Asset Renewal Costs Halifax Water I
Page 265 and 266: Asset Renewal Costs Stormwater Asse
Page 269 and 270: Statement Concerning Halifax Water
Page 271 and 272: Statement Concerning Halifax Water
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volume 1 - Halifax Regional Municipality

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