volume 1 - Halifax Regional Municipality

Halifax Water Integrated Resource Plan
Integrated Resource Plan Development and Evaluation
5.5 IRP VARIATIONS
The exploration of a broad range of variations in the IRP had to be balanced with data
limitations and with the practicalities of a compressed timeframe for IRP preparation.
The variations that were considered within the IRP were organized around the 14
objectives and the underlying LOS that were presented in Table 5.1.
Programs/projects presented in Tables 5.2 and 5.3 were incorporated into the 28 initial
alternative resource plans. The programs and projects by IRP objective with timing fixed
by the Five-Year Capital Plan were as follows:
• Objective 2 – Current Water System Compliance
• Objective 5 – Future Water System Compliance
• Objective 9 – Enhance System Security
• Objective 12 – Energy Reduction
The RWWFP projects and programs were designed to meet the demands of the HRM
baseline (medium) growth scenario, which in turn dictated the timing of required
system expansions. The programs and projects by IRP objective with timing fixed by the
RWWFP were as follows:
• Objective 6 – Future Wastewater Overflow Compliance (Baseline Case)
• Objective 13 – Meeting Demands of Growth
• Objective 14 – Managing Flow Capacity Allocations
A number programs/projects proposed through the IRP were developmental and
designed to establish the program scope and to prepare an appropriate business case
indicating the nature and timing of future expenditures. The program scoping
represented small expenditures with limited impact on the overall IRP fiscal
requirements. The programs and projects by IRP objective with program development
timing fixed were as follows:
• Objective 7 – Future Stormwater Compliance
• Objective 10 – Storm System Capacity
• Objective 11 – Adapt to Future Climate Change
A number of programs /projects did consider variations in timing implementation. These
programs/projects were in all cases associated with wastewater compliance issues. The
variations reflected the uncertainties in desired regulatory implementation timing. The
exception is a number of current WWTF compliance related upgrades that were
incorporated with timing fixed by the Five-Year Capital Plan. Some adjustments were
made in the original Five-Year Capital Plan timing through discussions with Halifax
Water staff. This was due to the advanced state of these projects. The
programs/projects by IRP objective with implementation timing varied were as follows:
Revision: 2012-10-29 Integrated Resource Plan 54
October 31 2012 Page 87 of 272