volume 1 - Halifax Regional Municipality

Halifax Water Integrated Resource Plan
Recommended IRP and Analysis
system asset renewal projects. These projects will replace aging sewer infrastructure
and will accordingly have an I/I reduction benefit.
Finally, the Recommended IRP includes $1.7 million for funding of the I/I pilot program.
This is an initial investment and it is anticipated that it will be necessary to plan for a
higher level of on‐going funding particularly as the program is implemented. As
previously noted, the I/I pilot and Wet Weather System Plan programs are described in
Volume 1 Appendix F
Water Use
While population in the HRM has been increasing, water demand has declined a net
amount (accounting for population growth) of approximately 1.5% per year over the last
ten years. The decline in water demand is due to reduced residential and employment
consumption. Figure 6.3 depicts the decline in urban core metered water consumption
showing the change in the period from 2001 to 2012.
Figure 6.3
Urban Core Metered Water Consumption History
6.3.2 Demand Reduction Case Study
A full business case analysis of demand reduction was not feasible for this IRP due to
limitations in available data. A case study approach was taken that examined the benefit
gained from water and wastewater demand reduction at the Dartmouth WWTF. The
Dartmouth WWTF was chosen since it will require expansion due to growth in the 2021‐
2026 timeframe as identified in the RWWFP.
The first step in the analysis was to estimate the flow components that comprise
wastewater flow under both existing (2011) and future (2046) conditions. The 2046
flows were developed as the basis of analysis in the RWWFP and were used for this
analysis. Figure 6.4 presents a schematic of the flow components for the Dartmouth
WWTF.
Revision: 2012‐10‐30 Integrated Resource Plan 80
October 31 2012 Page 113 of 272