Halifax Harbour Cleanup Inc. - Halifax Regional Municipality

More documents

Recommendations

Info

4 Project And Review Perspective 2.2 THE PROPOSED PROJECT 2.2.1 Summary In July 1989, Halifax Harbour Cleanup Inc. (HHCI) was given the mandate to plan, design and construct a system of sewage collection and treatment for the Halifax-Dartmouth metropolitan area. Over the period of the environmental assessment review, the Project continued to evolve. The Project consists of the design and construction of a sewage collection, treatment and disposal system. As proposed by HHCI, it includes • a collection system of interceptor sewers, tunnels, pumping stations, and combined sewer overflows (CSOs) to intercept wastewater from 39 existing outfalls around the Harbour d a single regional STP/OFS facility providing primary treatment, disinfection and sludge conversion to be located on an artificial island to be constructed in Ives Cove, and • a diffuser to discharge treated sewage to the Harbour Currently, 39 municipal outfalls sewing a developed area of about 7,000 hectares and about 225,000 people discharge approximately 135 million litres of raw sewage per day into Halifax Harbour (Figure 1). The raw sewage outfall at Watleys Cove, sewing Halifax Mainland South and Herring Cove, diicharges about 10 million litres per day. There are also about 60 commercial, institutional and industrial outfalls discharging into Halifax Harbour. These private outfalls are not part of the Project, although a number of them may be connected to the collection system in the future. Figure 1 Existing Municipal Sewage Outfalls. Source: After Halifax Harbour Cleanup Inc. .
Project And Review Perspective 5 2.2.2 The Collection System The sewage collection system requires the construction of tunnels, pumping stations and CSOs along the Dartmouth and Halifax waterfronts and from Mainland South and Herring Cove. The collection system will be over 25 kilometres long, of which about 75% will be tunnelled. The existing municipal outfalls throughout the collection area will be intercepted, and the sewage transported to a treatment plant situated on an artificial island at Ives Cove, off McNabs Island (Figure 2). Figure 2 Project Description Source: After Halifax Harbour Cleanup Inc. Harbour Divisions after Halifax Harbour Task Force The collection tunnels will be designed to carry all the dry-weather sewage flow and a portion of the stormwater. During storms, there will be overflows into the Harbour from approximately 17 CSOs. The CSOs will provide preliminary treatment to remove floatables and some solids before discharging the effluent into the Harbour. Disinfection will be provided at the 2 Northwest Arm CSOs. On a yearly average, 75% of the raw sewage and stormwater currently discharged into the Harbour from existing outfalls will be intercepted and conveyed to the treatment plant. HHCI proposes collecting all flows from Mainland South and Herring Cove as part of the regional collection and treatment system. Provision has been made to accept septage from the County of Halifax. Sewage from existing treatment plants at Eastern Passage and Mill Cove can be incorporated into an expanded system at a future date.
Page 1 and 2: Halifax Harbour Cleanup Project
Page 3 and 4: CanacEi X NOVA SCOTIA Minister of t
Page 5 and 6: 4.8 SEWAGE TREATMENT AND SLUDGE MAN
Page 7 and 8: Summary 1 1. SUMMARY In November 19
Page 9: Project And Review Perspective 3 2.
Page 13: Project And Review Perspective 7 Th
Page 16 and 17: 10 Halifax Harbour: The Receiving E
Page 18 and 19: 12 Halifax Harbour: The Receiving E
Page 20 and 21: treatment necessary to meet the wat
Page 22 and 23: 16 Issues that were of concern rega
Page 24 and 25: potential for deleterious interacti
Page 26 and 27: 20 Issues Table 3b Advantages Advan
Page 28 and 29: • Stewardship . Full Cost Account
Page 30 and 31: 24 Issues Some objectives from thei
Page 32 and 33: 26 Issues 0 deleterious acute, chro
Page 34 and 35: 26 Issues Association has developed
Page 36 and 37: 30 Issues 2. ldentify key actors an
Page 38 and 39: 32 Issues Those existing outfalls t
Page 40 and 41: 34 issues Table 5 Advantages Advant
Page 42 and 43: • Options for treatment plants we
Page 44 and 45: 38 Issues • limited opportunities
Page 46 and 47: 40 Issues 4.8.2 Level of Treatment
Page 48 and 49: 42 Issues SLUDGE TREATMENT (06) Fig
Page 50 and 51: 44 Issues 7. Exhaust gases from the
Page 52 and 53: 46 Issues 0 The predesign report fo
Page 54 and 55: 48 Issues Concerns about the visual
Page 56 and 57: 50 Issues r d) the Project agreemen
Page 58 and 59: 52 Issues 4.10 CONSTRUCTION OF THli
Page 60 and 61:
54 Issues . ;, • negative effects
Page 62 and 63:
56 Issues The Panel approves of HHC
Page 64 and 65:
of Halifax) may be left in limbo, a
Page 66 and 67:
60 Issues HHCI has provided a listi
Page 68 and 69:
for the integrity of construction a
Page 70 and 71:
64 Issues Loss of lobster fishing a
Page 72 and 73:
66 Recommendations 16. The Panel re
Page 74 and 75:
66 Recommendations I) a survey and
Page 76 and 77:
70 Recommendations 71. The Panel re
Page 78 and 79:
APPENDIX B MANDATE FOR THE PANEL RE
Page 80 and 81:
74 APPENDIX C TECHNICAL SPECIALISTS
Page 82 and 83:
76 APRIL 1. 1993 APRIL 3,1993 HALIF
Page 84 and 85:
kchemlcal oxygen demand (BOW MoWdow
show all

Halifax Harbour Cleanup Inc. - Halifax Regional Municipality

Create successful ePaper yourself

Delete template?

Save as template?