volume 1 - Halifax Regional Municipality

Halifax Water Integrated Resource Plan
Recommended IRP and Analysis
demand reduction, which could mitigate the expansion requirements and timing. The
low growth scenario would delay the timing of expansion and reduce the expansion
requirements.
The same conclusions can be applied to the distribution and collection system
requirements. The required expansions for transmission mains or wastewater trunk
sewers as well as storage and pumping facilities for both systems will either need to be
increased and accelerated or reduced and delayed depending on whether the high or
low scenario is applied.
Table 6.3
Sensitivity of Treatment Expansion Requirements to Growth Rate
Facility
Current Capacity
Current Flow/Demand
(m 3 /d)
Future Recommended
IRP Capacity
(m 3 /d)
Future Baseline Growth
Scenario Flow/ Demand
(m 3 /d)
Future High Growth
Scenario Flow/ Demand
(m 3 /d)
Future Low Growth
Scenario Flow/ Demand
(m 3 /d)
Facility Expansion
Requirement
Lake
Major
WSP
J.D. Kline
WSP
Dartmouth
WWTF
94,000 40,000 90,000 63,000 ~75,000 ~57,000
227,00
0
85,000
220,00
0
128,00
0
~151,000
~116,00
0
83,808 54,500 99,860 99,860 ~115,000 ~92,000
• No expansion of WSP under
baseline scenario required.
• No expansion of the WSP
required under high and low
scenarios.
• High scenario demand may
exceed Lake Major safe yield of
65,900 m 3 /d. Additional supply
may be required.
• No expansion of WSP under
baseline scenario required.
• No expansion of WSP required
under high and low scenarios
• High demand may exceed J.D.
Kline safe yield of 145,500
m 3 /d. Additional supply may be
required.
• Expansion required by 2021-
2026 under baseline scenario.
• Future WWTF capacity would
need to increase under high
scenario. Current expansion
timing would need to
accelerate.
• Future WWTF capacity would
decrease under low scenario.
Current expansion timing could
be delayed.
Revision: 2012-10-29 Integrated Resource Plan 88
October 31 2012 Page 121 of 272