volume 1 - Halifax Regional Municipality

Halifax Water Integrated Resource Plan
Appendices
From these mid-level audits, a significant number of energy-reduction opportunities
have been identified thus far. These opportunities have the potential to generate
significant energy and financial savings in the future. A preliminary list of opportunities
identified to date along with an estimate of their implementation status, potential
savings, cost benefits, and environmental benefits has been compiled including wind
energy (J.D. Kline plant, Lake Major, and Long Lake), hydrokinetic turbines (Robie Street
Control Chamber in Halifax and Orchard Control Chamber in Bedford), energy recovery
(hydrokinetic turbines, heat exchangers and highly efficient industrial heat pumps, and
use of bio-gas).
A number of improvements have been proposed through the Halifax Water Five-Year
Capital Plan primarily for the period 2013 to 2017. Recommendations regarding energy
related Levels of Service (LOS) are presented in Volume 1 Section 7 under the
Implementation Plan.
1.2 CURRENT WASTEWATER SYSTEM PROGRAMS
1.2.1 Current Wastewater WWWTF and Overflow Compliance
There are a number of projects associated with current WWTF and overflow compliance
in the Halifax Water Five-Year Capital Plan 3 . The WWTF projects are discussed under a
comprehensive compliance program presented in Section 4. The project costs and
timing associated with current overflow compliance are presented in the financial
model for the Recommended Plan located in Volume 1 Appendix H. In the Five-Year
Capital Plan, there is approximately $61.2 million identified for the current WWTF
compliance program. The overall capital cost of the current overflow compliance
program is $47.7 million ($2012). Major expenditures are associated with collection
system upgrades in a number of sewersheds with particular emphasis on sewersheds
having high inflow and infiltration (I/I) flows.
1.2.2 Current I/I Program
Halifax Water staff has carried out significant research to identify appropriate
techniques to address inflow and infiltration and particularly to establish policy and best
practices based on successful examples in other jurisdictions. Industry experience
indicates that approximately 50% to 80% of I/I originates from the private system.
Halifax Water has estimated the rate of I/I attributable to private side infrastructure
approximately 50% mark. To that end, Halifax Water has introduced its Stormwater
Inflow Reduction (SIR) program to find ways to reduce private-side contributions to the
wastewater system.
3 Halifax Water Five-Year Business Plan 2012-2013 to 2016-2017, Halifax Water,
December 2011
Revision: 2012-10-29 Integrated Resource Plan –Appendices F-4
October 31 2012 Page 183 of 272