volume 1 - Halifax Regional Municipality

Halifax Water Integrated Resource Plan
Appendices
4. INTEGRATED RESOURCE PLAN FRAMEWORK - PROCESS
TOR Requirement
1. IRP process will develop a plan for delivering
water, wastewater, and stormwater services
that minimizes the cumulative present worth of
annual revenue requirements, while meeting
various performance requirements and
regulatory constraints.
2. IRP process will use current models, where
available, to evaluate the developed resource
plans against the IRP objective and constraints
(Modeling may include financial assumptions,
regulatory constraints, water demand and
wastewater/ stormwater flow and capacity
forecast, supply-side and demand-side options).
3. IRP process will identify future programs
needed for management of stormwater
(infrastructure, flows, capacity, flood
protection, stormwater quality issues,
retention/storage needs, etc.)
4. IRP process, where feasible and appropriate,
will use sensitivity analysis to address a range of
reasonable assumptions.
5. IRP process will consider technically,
economically, and environmentally viable
supply-side technologies including operating
practices (optimizations), capital and operating
costs, and operating assumptions.
IRP Reference
Sections
4 and 5
Section 5
Volume 1
Appendices F and
H
Volume 3
Appendix E
RWWFP
Section
5.4
Sections
5.0 and 6.3
Sections
3.3 and 5.4
Halifax Water embarked on the preparation of an Integrated Resource Plan (IRP) for its water,
wastewater, and stormwater services in order to define its overall program and resource needs for
the next thirty years (2013 - 2043). Specific projects and programs were allocated to each objective
in the financial plan from existing Halifax Water initiatives and new program initiatives (Section 5.4),
identifying the long-term servicing needs of Halifax Water’s water, wastewater, and stormwater
infrastructure. Section 5 identifies how the IRP was developed and analysed in a cost-effective and
reliable manner.
The IRP financial analysis was carried out with a financial modeling tool specifically developed for the
IRP. Details of financial modelling are presented in Section 5 and in Volume 1 Appendix H.
The Enhanced Asset Renewal program was formulated using a proprietary model described in
Volume 3 Appendix E.
The Enhanced Overflow Control program was developed based on wastewater system modeling
conducted under the RWWFP. Details of the program development are presented in Volume 1
Appendix F.
In parallel with the Regional Stormwater Functional Plan (to be prepared by HRM), it is recommended that
Halifax Water consider a new climate change assessment program intended to examine the impacts of
climate change on Halifax Water current infrastructure, operations and future design requirements as well
as a new Stormwater Quality Assessment program designed to assess likely future stormwater quality
management requirements.
In Section 5 the various levels of the alternative resource plans were subjected to their sensitivity to
various plan elements such as the level of asset renewal.
In Section 6, the Recommended Plan was analysed to assess the impact of three factors:
• The potential benefits of water demand reduction and I/I reduction on the Recommended Plan.
• The level of asset renewal (A, B, C and composite) on end-of-period asset value.
• The population growth rate (high, baseline and low) on plan requirements.
As noted in ToR # 23 there is a broad range of supply-side alternatives considered. They were
derived from the following sources:
• Five-Year Capital Plan
• Program/project extensions beyond the Five-Year Capital Plan refined in the IRP
• RWWFP
• Programs and projects developed through the IRP
Revision: 2012-10-29 Integrated Resource Plan –Appendices G-10
October 31 2012 Page 222 of 272