Integrated Resource Plan
description
Transcript of Integrated Resource Plan
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Integrated Resource Plan
Technical Conference 2
October 4, 2011
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Today’s Meeting
• Background• Purpose of IRP • Stakeholder Process• Break• IRP Drivers and Constraints• Demand and Supply Options• Lunch• Round Table Discussion• Next Steps
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Halifax Water – Background
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• 1945 – through the Halifax Public Utilities Commission Act – Utility and Review Board begins regulating water utilities
• 1996 – Municipal amalgamation occurred – City of Dartmouth, City of Halifax, Town of Bedford and Halifax County merge
• Wastewater (WW) & Stormwater (SW) assets become responsibility of new Halifax Regional Municipality (HRM)
• Water system assets transferred from City of Dartmouth & Halifax County – Halifax Regional Water Commission
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Halifax Water – Background…continued
• 2007 – HRM transferred WW & SW assets to Halifax Water• Regulatory oversight by UARB (WW & SW assets)• Required a few years to understand the value of the
inherited assets• Historical underinvestment in WW & SW assets
• 2010 – Halifax Water rate case made it clear that a long term planning approach was needed
• 2011 – NSUARB orders Halifax Water to prepare IRP
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Regulatory Oversight
Government oversight of municipal water utilities is provided by two government agencies:
www.hrwc.ca
Nova Scotia Environment
(NSE)
Regulates water safety issues
Nova Scotia Utility and Review Board (NSUARB)
Regulates water rates
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Integrated Resource Plan (IRP) Overview
• An Integrated Resource Plan (IRP) is a comprehensive planning method that:• Uses a long-term planning horizon• Recognizes environmental constraints• Includes stakeholder participation• Assesses supply-side & demand-side management
options• Uses scenario analysis• Conducts least cost financial analysis on scenarios
that fulfill the performance requirements• Recommends a preferred plan
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• The purpose of the IRP is to create:• Method for evaluating alternative servicing scenarios• Long-term direction for Halifax Water• Comprehensive assessment of system & investment
options• Framework for detailed capital investment analysis
(more detailed will be done as capital needs are budgeted and approvals requested)
• Risk management plans for issues & key uncertainties facing Halifax Water
• Confidence in financial analysis in support of future rate applications to the NSUARB
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Integrated Resource Plan (IRP) Overview
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IRP Charter
“We will create an Integrated Resource Plan
(IRP) that provides clear direction for Halifax
Water and its rate-payers on the resources
required to develop world-class cost-effective
water, wastewater and stormwater infrastructure
systems that meets the needs of the present and
future generations. The IRP will also determine
the capital and operating costs required to
support the present and future infrastructure
systems.”
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IRP Scope
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• IRP will address infrastructure within Halifax Water’s mandate• Water system• Wastewater system• Stormwater system
• IRP scheduled for completion by June 2012
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Halifax Watersheds
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Asset Renewal
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Water, Wastewater & Stormwater Infrastructure
Private and On-lotNot Included in IRP
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Lakes, Streams and Rivers, Wetlands - Nova Scotia Environment
Floodplains - Nova Scotia Environment and Halifax Regional Municipality
On-Lot Drainage - Halifax Regional Municipality
and Property Owner
Major Drainage Routes - Halifax Regional Municipality
Storm Sewers, Inlets, Ditches Culverts and SWM Ponds –
Halifax Water
Stormwater Systems: Multiple Jurisdictions
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Integration in the IRP
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• Common planning and land use projections used to integrate requirements across all infrastructure systems
• Common decision framework and criteria used to determine integrated project/program priorities
• Wastewater priorities assessed on a sewershed basis for WWTF effluents, CSOs and SSOs
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Integration in the IRP… continued
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• Integrated analysis of WW & SW systems to assess impacts on WW collections and treatment facilities
• Demand & supply integration options (e.g. water efficiency) will provide benefits to both water and wastewater systems
• Common costing and financial analysis framework
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Real time collaboration with Halifax
Water & NSUARB
IRP Process
www.hrwc.ca
NSUARB
Halifax Water
Tellus / Wright-Pierce /
Hydrologics
Genivar / XCG /
Halcrow
IRP Stakeholders
Consultation
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IRP Stakeholder Process
• Technical Conferences• Terms of Reference• Assumptions & Plan Considerations• Resource Plans & Sensitivities• Resource Plan Analysis• Present Draft IRP
• One-on-One Stakeholder Meetings• Early identification of issues
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March 24, 2011
October 4, 2011
December 6, 2011
March 6, 2012
May 9, 2012
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Technical Conference
2
Technical Conference
1
IRPTerms of
Reference
Technical Conference
3
Assemble Resource
Plans
Stakeholder Meetings
IRP Drivers Demand /
Supply Options
Assumptions
Finding the Preferred IRP
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Evaluate Performance/Assess Costs
Technical Conference 4
Prepare Draft IRP
Technical Conference 5
Halifax Water Integrated
Resource Plan
Candidate Plan Analysis
Finding the Preferred IRP…continued
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What We Heard
• Have Halifax Water to be the leader on a number of issues outside Halifax Water’s mandate• watershed planning• on-site systems monitoring and programs• land use planning• stormwater management
• Explain the jurisdictional constraints across the infrastructures
• Broaden the IRP outreach to include the general public• Prepare ratepayers / stakeholders for the rate increases
that will likely come out of the subsequent rate application
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Break
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IRP Integrates Three Drivers
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GROWTHCOMPLIANCE
ASSET RENEWAL
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Asset Renewal
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Current Asset Profile
•Water System• Large Water Supply Plants – 3• Small Community Water Supply Plants – 2 • Small Community Well Systems – 3 • Storage – 18 Reservoirs• Pumping Stations – 20 • Transmission/Distribution Mains – 1,307 km• Control chambers – 110• Appurtenances ~21,000• Water Meters – 79,000+• Dams – 6
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Current Asset Profile
•Wastewater System• Harbour Solutions Wastewater Treatment Facilities – 3• Large Wastewater Treatment Facilities – 4 • Small Community Wastewater Treatment Facilities – 8• Pumping Stations – 172• Sewers – 1,400 km• Storage – 5• Appurtenances ~22,000
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Current Asset Profile
•Stormwater System
• Storm Sewers – 789 km
• Cross culverts – 8 km (estimated)
• Ditches – 130 km
• Retention Ponds – 25
• Appurtenances ~32,000
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Expected Asset Lives
• Tools & work equipment 5 – 30 years• Office equipment, transportation 3 – 10 years• Pumping equipment 5 – 20 years• Treatment works equipment 10 – 20 years• Water meters 20 – 25 years• Service connections 50 – 60 years• Distribution reservoirs 75 years• Structures, buildings 50 – 100
years• Water, wastewater & storm pipes 60 – 100 years
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Infrastructure Asset Serviceability
• The capability of a system of assets to deliver a reference level of service to customers and to the environment now and into the future• Assets are not maintained for their own sake but for
the service they perform• Service indicators used to measure Levels of Service
• e.g. Service outages of water (target 200 connection hrs./1000 customers per year)
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“Serviceability to Customers and the Environment”
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HW Corporate Balanced Scorecard
• HRWC embarked on a Continuous Improvement Program in 1999
• Introduced the concept of Corporate Balanced Scorecard (CBS) in 2001
• Developed a new mission statement in 2007• Identified critical success factors (CSFs) in
support of the new mission (e.g. High Quality Drinking Water)
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HW Corporate Balanced Scorecard
• Developed organizational indicators (OIs) to measure performance (e.g. Bacteriological tests – target 99.3% free of Total Coliform)
• With the 2007 merger, Halifax Water expanded the CSFs and OIs across wastewater and stormwater infrastructure
• Periodic reviews of the CSFs and OIs are done to confirm the continued relevance of specific performance indicators or in response to changing requirements
• Provides the basis for establishing Levels of Service
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System Asset Management (OIs)
• Water supply leakage target of 200-210 L/service connection/day
• Inflow and Infiltration (I&I) target of 200 inspections on private property/year
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Major Asset Renewal Issues
• Inherited wastewater and stormwater systems asset renewal deficit • Recapitalization needed over 30 year timeframe across
all wastewater and stormwater asset classes • Water systems will also require renewal of key assets
• Pockwock WSP 34 years old in need of refurbishment• Transmission mains require timely replacement to
avoid catastrophic failure and strengthen system• Halifax Water extending Asset Management Program
• Improving knowledge of assets and determination of optimal asset renewal rates
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IRP Asset Renewal Assumptions
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Asset Replacement Projections - Forcemains2009 to 2059
Year
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acem
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rs (1
000s
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IRP Asset Renewal Assumptions
• Renewal requirements and rates will be determined individually for each asset class
• Renewal rates will be based upon:• Current condition• Expected remaining asset life• Current performance with respect to existing Levels
of Service indicators• Industry benchmarks
• Best professional judgment will be applied where there are data gaps
• Preliminary, rough estimates for minimum asset reinvestment – $67M/year ($1.6B over 25 years)
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Regulatory Compliance
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Regulatory Perspectives
• Principal regulation specific to each system • Water – Nova Scotia Environment (NSE),
Health Canada• Wastewater – NSE, Environment Canada• Stormwater – NSE, HRM
• Considers three perspectives• Existing – Current regulatory requirements• Expected – Regulatory requirements in near future• Future – Possible future regulatory requirements
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Existing Water System Regulation
• Guidelines for Canadian Drinking Water Quality http://www.hc-sc.gc.ca/ewh-semt/water-eau/drink-potab/guide/index-eng.php
• Nova Scotia Environment• Capacity• Drinking Water Quality• Monitoring & Reporting
• Halifax Water Response• Water Quality Management Plan• Compliance Monitoring and Reporting• CBS – Organizational Indicators
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Water System OIs
• Percentage of water supply plants meeting product regulations of their permits (ongoing)
• Bacteriological tests (Monthly target of 99.3% free of Total Coliform)
• Customer satisfaction about water quality (Target of 85% rating water quality as good to excellent) (annual)
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Expected Water System Requirements
• Halifax Water adopted OIs for expected requirements (extended goals) for five drinking water parameters that exceed current compliance requirements for residual disinfectant (chlorine), trihalomethanes (THM), haloacetic acid (HAA), particle removal, corrosion control (lead)
• Meet all current compliance requirements
• Meet most but not all OI extended goals for the water quality parameters
• Water Quality Master Plan being implemented to reach compliance for all extended goals
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Future Water Regulatory Requirements
• Continued emphasis on reducing disinfection by-products e.g. THMs, HAAs and other compounds
• Ensuring distribution system water quality • Residential lead • Minimum disinfectant residual
• Ongoing assessment of microbial risk (e.g. Quantitative Microbial Risk Assessment (QMRA))
• New contaminants
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IRP Water System Assumptions
• Water supply systems meet current compliance requirements
• Water Quality Master Plan through operational improvements will meet extended goals
• Future regulatory requirements will emerge (may result in different assumptions and scenarios for future IRPs)
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Current Wastewater Treatment Facility Regulation• Nova Scotia Environment
• Capacity• Effluent Quality• Monitoring & Reporting• Biosolids Quality
• Canadian Food Inspection Agency – Fertilizer Act • Biosolids Quality
• Halifax Water Response• Wastewater Treatment Facilities Compliance Plan
(DRAFT)• Compliance Monitoring and Reporting• CBS – Organizational Indicators
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• Environment Canada – Atlantic Canada Wastewater Guidelines Manual (2006)
Combined Sewer Overflows (CSOs)• All new sewer systems be designed as separate sewers• Requirements for CSO treatment specified by the
regulatory agency having jurisdiction• Reduce, where possible and practical, the frequency and
duration of CSOs to minimize impacts on receiving water
Current Wastewater Treatment Facility Regulation
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• Environment Canada – Atlantic Canada Wastewater Guidelines Manual (2006)
Sanitary Sewer Overflows (SSOs)• Chlorination unless waived by the regulatory agencies• Alarmed and equipped to indicate frequency and duration
of overflows, and designed to permit manual flow measurement
• All overflows should be recorded and reported to the regulatory agencies
Current Wastewater Treatment Facility Regulation
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Wastewater System OIs
• Percentage of wastewater treatment facilities meeting discharge regulations of their permits (excludes Harbour Solutions plants)
• # of CSO and SSO events per year • # of public health and environmental regulatory
infractions resulting in a written warning• # of public health and environmental regulatory
infractions resulting in a conviction
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Expected WWTF Regulatory Requirements
• Environment Canada – Draft Wastewater Systems Effluent Regulations (WSER - 2011)• National Performance Standards – minimum
requirementscBOD5 <= 25 mg/LTSS <= 25 mg/LTRC <= 0.02 mg/LUn-ionized ammonia <=1.25 mg/L at 15 ˚C
• Effluent Discharge ObjectivesBased on the result of Environmental Risk
Assessments (ERA’s)Site specific – assimilative capacity of the
receiver
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Expected WWTF Regulatory Requirements
• Halifax Harbour Solutions plants will require upgrade to secondary treatment to comply with expected Environment Canada WSER
• Three community WWTFs will require upgrade to comply with expected Environment Canada WSER chlorine residual requirements
• One WWTF (Eastern Passage) is being designed to comply with expected Environment Canada WSER (currently under expansion/upgrade)
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Future WWTF Requirements
• Discharge to limited receiving streams or lakes
• Increased requirements for advanced nutrient removal nitrogen and phosphorus
• Requirements for emerging pollutants
• e.g. personal care products, pharmaceuticals and endocrine disruptors
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Expected CSO/SSO Requirements
• Environment Canada - Wastewater Systems Effluent Regulations (WSER - 2011)
• Monitoring and Reporting (5 years)• Duration of overflow• Volume• No of days in month• Annual report
• Development of CSO Management Plan
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Future CSO/SSO Requirements
• CSO• No increase in CSO frequency related to development
or re-development unless it occurs as part of an approved CSO management plan
• No CSO discharge during dry weather, except during spring thaw and emergencies
• Floatable material will be removed, where feasible• SSO
• SSO frequencies should not increase due to development or re-development
• SSOs should not occur during dry weather, except during spring thaw and emergencies
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IRP WWTF Assumptions
• A number of existing WWTFs are a current compliance priority
• Harbour Solutions WWTFs will require upgrade to meet expected Environment Canada WSER requirements
• A number of other WWTFs will require upgrade to meet WSER requirements
• The WWTFs discharging to sensitive receiving streams and lakes will likely require significant upgrades beyond current effluent limits or WSER requirements over the planning period of the IRP (could require very costly treatment system upgrades to serve small customer base)
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IRP CSO/SSO Assumptions
• Halifax Water will be developing plan to improve overflow compliance
• SSO• Fresh water discharges• Set target frequency based on events per average year• Prioritization by public health & receiving water impacts
• CSO• Marine water discharges• Set target frequency for recreational areas based on
events per aquatic recreation season (e.g. NW Arm)• Set target frequency for other marine waters based on
events per average year• Prioritization by public health & receiving water impacts
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CSO/SSO Knee-of-the-Curve Analysis
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CSO/SSO Knee-of-the-Curve Analysis
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Current Stormwater System Regulation
• Nova Scotia Environment (NSE)• Water Strategy• Stormwater approvals• Watercourse alterations• Wetlands Conservation Policy• Floodplain delineation and management• Erosion and Sediment Control Guidelines
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Current Stormwater System Regulation
• Halifax Regional Municipality• Land use planning• Stormwater management and planning• Development approvals• Stormwater Management Guidelines• Lot grading
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Future Stormwater System Regulation
• Watershed based planning and requirements• Ecosystem based requirements• Water balance criteria • Water quality requirements• Climate change adaptation• Low Impact Development
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Growth
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Growth Forecasting
• Actual growth rates for period 1996 to 2006 ~ +0.8%• Based on estimates for Regional Plan (2006 – 2026)
by HRM Planning • 2006 - 2026 growth rates extended to 2041• Range of growth rates being considered by IRP
• Low ~ 0.47%• Baseline ~ 0.81%• High ~ 1.14%
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Growth Forecasting
• Growth allocation as per 2006 Regional Plan targets:• Rural areas ~25%• Suburban ~ 50%• Regional Centre ~ 25%
• Includes three suburban greenfield areas as per Regional Plan :• Port Wallace• Susie Lake• Sandy Lake
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Funding of Growth
• Benefits-based funding approach will be used for growth (i.e. those who benefit should pay)
• Rate-based funding will cover regulatory and asset renewal system improvements
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Rate of Growth Determines Timing of Needed Infrastructure Expansion
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IRP Growth Assumptions
• IRP will plan infrastructure to meet requirements of future growth in a timely manner
• Planning period 2011 - 2041• IRP will follow Regional Plan/HRM Planning growth
projections• IRP will include a range of growth rates
• Low ~ 0.47%• Baseline ~ 0.81%• High ~1.14%
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Demand Reduction Options
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Demand Reduction Options*
*IRP Terms of Reference
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Water Demand Reduction Options
• Water options aggregated into• Leakage reduction (e.g. non-revenue water, customer
leakage reduction, etc.)• Indoor/outdoor water efficiency
• Water rates considered in separate study• Water efficiency may also benefit wastewater system
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Wastewater Demand Reduction Options
• Wastewater options aggregated into• I/I reduction (e.g. lateral repairs, lining, manhole
rehabilitation, extraneous flow reduction, construction standards)
• Impact of water efficiency• Wastewater rates considered in separate study• Wastewater effluent recycling or grey water reuse not
considered at this time (would require engagement of Nova Scotia Environment)
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Stormwater Demand Reduction Options
• Stormwater demand reduction not within Halifax Water jurisdiction and hence not considered at this time
• HRM’s Regional Functional Stormwater Plan should examine this issue
• Halifax Water collaborating and providing input into the Regional Functional Stormwater Plan
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Impact of Demand Reduction on Required Infrastructure Capacity
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• Cost ($) of demand reduction must be balanced by benefits ($) from deferred infrastructure expansion
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Current I/I Estimates for Selected WWTFs
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WWTFWastewaterADF (m3/d)
Water ConsumptionADF (m3/d)
Percent I/I
EASTDartmouth 52,520 28,148 52%Eastern Passage 17,500 9,629 50%North Preston 575 355 45%
WESTMill Cove 22,200 12,703 49%
WESTHalifax 104,900 52,017 55%Lakeside Timberlea 3,800 2,263 46%Herring Cove 12,700 6,781 52%Percent I/I = 1-(90% of Water Consumption / Wastewater) 18-Aug-11
ADF = average daily flow
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I/I Reduction Studies
• Areas shown represent historical studies where I/I was identified/quantified and efforts made to identify sources
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Halifax Urban Core Water Demand
2006/07 2007/08 2008/09 2009/10 2010/1136,000,000
36,500,000
37,000,000
37,500,000
38,000,000
38,500,000
39,000,000
39,500,000
40,000,000
40,500,000
41,000,000
Cubic Metres
• Indoor/outdoor water use declined 5.9% since 2006/07
• Corresponds to ~ 1.2% per year reduction
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IRP Demand Reduction Assumptions
• IRP will examine both water system and wastewater system demand reduction options• Water will include: leakage reduction and
indoor/outdoor water efficiency• Wastewater will include: I/I reduction and indoor water
efficiency• Stormwater demand reduction not included at this time
• A range of water and wastewater system demand reduction levels of implementation will be considered
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Supply Options
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Supply Options*
*IRP Terms of Reference
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Water Supply Options
• Water supply options address expansion & upgrade needs• Water supply options aggregated into:
• Water treatment, pumping, transmission, storage and distribution new facilities and/or upgrade, and expansion of existing facilities to meet growth or regulatory drivers
• System operational improvement and optimization to enhance capacity or treatment
• Integration of above• Leakage and metering will be addressed in demand
reduction• Halifax Water already has a well advanced source water
protection program including strategic land management
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Wastewater Supply Options
• Wastewater system supply options address system expansion and upgrade needs
• Wastewater system supply options aggregated into:• Wastewater treatment, pumping, transmission, storage
and collection new facilities and/or upgrade, and expansion of existing facilities to meet growth or regulatory drivers
• System operational improvement and optimization to enhance capacity or treatment
• Integration of above• Receiving water quality will be considered in setting
wastewater supply option priorities• Strategic land management needs consideration
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Stormwater Supply Options
• Stormwater system supply options address system expansion and upgrade needs
• Stormwater system supply options aggregated into:• Stormwater collection (pipes, culverts and ditches) and
storage new facilities and/or upgrade and expansion of existing facilities to meet growth or regulatory drivers
• New deep storm sewers will be considered as part of the I/I reduction approach (look for cost share opportunities)
• Impacts of stormwater quality on receiving waters and strategic land management for stormwater planning fall outside HW mandate (will require a multi-party approach such as through the Regional Functional Stormwater Plan or watershed based management approach)
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IRP Supply Options Assumptions
• IRP will examine water system, wastewater system and stormwater system supply options that fall within the mandate of Halifax Water and that address system expansion and upgrade needs
• Options will include:• New facilities and/or upgrade and expansion of
existing facilities to meet growth or regulatory drivers• System operational improvement and optimization to
enhance capacity or treatment
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IRP Supply Options Assumptions … continued
• Integration of growth and regulatory upgrades and expansions with operational improvements and optimizations
• Review of Policy and Procedures (e.g. stormwater responsibilities – who does what?)
• New deep storm sewers will be considered as part of the I/I reduction approach (look for cost sharing opportunities)
• Strategic land management is relevant to water and wastewater systems at this time
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Lunch
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Round Table Discussion
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Next Steps
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• Consider comments received in relation to Technical
Conference #2 (deadline October 18, 2011, 4:00 PM)
• Issue summary of meeting actions and key points
• Assemble resource plans and supporting information
• Prepare for Technical Conference #3 and issue
information package
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Next Steps
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Questions or Comments?