volume 1 - Halifax Regional Municipality

Halifax Water Integrated Resource Plan
Appendices
TOR Requirement
8. IRP process will perform and document a
screening analysis to determine which
options are to be evaluated further in the
IRP process and which can be removed
from further consideration.
9. IRP process will identify all assumptions
used for the IRP process including planning,
forecast, and financial assumptions.
IRP Reference
Section
5
Detailed
throughout
Volumes 1 and 3 of
the IRP report
The development and analysis of the Integrated Resource Plans was a multi-step iterative process
involving the Halifax Water technical team comprised of staff and consultants collaborating with the
Tellus team. Results of plan development and analysis were presented to the Stakeholders Group at key
points in the process. Figure 5.1 presented an overview of the IRP alternative resource plan
development and evaluation process. Section 5.5 details the IRP variations and Sections 5.7 to 5.10
details the initial, intermediate, refined, and short-list plans, documenting which options were to be
evaluated further in the IRP process (i.e. enhanced overflow control) and which were removed from
further consideration (A, B, and C asset renewal changed to a composite asset renewal program).
Assumptions are detailed throughout the IRP report including those for asset service life estimates
which were based on best industry practice, enhanced overflow control, demand reduction, end-ofperiod
analysis, and financial modelling.
Asset life data and fractional values are contained in the costing procedures technical memorandum,
which is presented in Volume 3 Appendix C.
10. IRP process will develop the resource plans. Sections
5 and 6
See ToR #24 above.
Figure 5.1 presents an overview of the IRP alternative resource plan development and evaluation
process. Through the synthesis of key inputs, twenty-eight initial resource plans were developed. These
were evolved through into 18 intermediate plans and then 10 refined plans. A short list of four plans
was selected from the 10 refined plans. The final recommended plan was selected from the short list,
which is presented in Section 6, IRP Recommended Plan.
11. IRP process will evaluate the resource plans
to determine the preferred alternative
based on the least cost plan that meets the
defined performance requirements and
criteria. Least cost is defined as the lowest
cumulative present worth of the annual
revenue requirements.
12. IRP process will perform sensitivity analysis
to determine the impacts of realistic
variations to the input assumptions.
Section
5.10
Section
6.3
The rationale for the selection of the Recommended Plan is presented in Section 5.10.
The Recommended Plan analysis is presented in Section 6.3.
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.
Revision: 2012-10-29 Integrated Resource Plan –Appendices G-8
October 31 2012 Page 220 of 272