volume 1 - Halifax Regional Municipality

Halifax Water Integrated Resource Plan
Integrated Resource Plan Development and Evaluation
5.9 INTERMEDIATE PLAN DEVELOPMENT AND ANALYSIS
Based on the initial plan analysis described above, the following modifications were
applied to the initial plans to develop 18 intermediate plans:
• Plans 1-1 to 14-1 corresponding to Bundles 1 and 2 (modified RWWFP Plans) were
eliminated from further consideration as less environmentally sustainable.
• The timing for the HHSP facilities upgrades (Objective 4) was fixed at 20 years
consistent with the most recent risk analysis.
• Four plans (19-1, 20-1, 26-1 and 27-1) were modified to create 4 new Intermediate
Plans. The enhanced WWTF nutrient program (Objective 4) was changed to the
same level (A, B or C) as Objective 1 and Objective 3 to produce a consistent level
for all wastewater programs. These new plans were labelled 31-2, 29-2, 35-2 and
33-2 respectively.
• Four additional plans (30-2, 32-2, 34-2 and 36-2) were added to allow examination
of the full range of asset renewal and wastewater compliance timing for the
Baseline and Enhanced Overflow Control Plan groupings.
The 18 intermediate plans are presented in Table 5.9.
Table 5.9
Plan
No.
Intermediate Alternative Resource Plans
30 Yr. NPV
$million
Current
WWTF
Objective
1
Current
Overflow
Objective 3
Future
WWTF
Nutrient
Objective
4
Future
Overflow
Objective
6 & 13
Asset Renewal
Objective 8
15-2 $2,011 C C C Baseline C
16-2 $2,129 A A A C
17-2 $2,815 C C C A
18-2 $2,932 A A A A
21-2 $2,466 B B B B
29-2 $2,066 B B B C
30-2 $2,411 C C C B
31-2 $2,528 A A A B
32-2 $2,870 B B B A
22-2 $2,083 C C C Enhanced C
23-2 $2,200 A A A C
24-2 $2,886 C C C A
25-2 $3,003 A A A A
28-2 $2,537 B B B B
33-2 $2,137 B B B C
34-2 $2,482 C C C B
35-2 $2,599 A A A B
36-2 $2,941 B B B A
Revision: 2012-10-29 Integrated Resource Plan 70
October 31 2012 Page 103 of 272