Water Source / Supply Study Workshop #2 Joint Shared Service - PowerPoint PPT Presentation

Water Source / Supply Study Workshop #2 Joint Shared Service Committee July 13th

Purpose of the Source Supply Study • Review and prioritize known sources – 3 primary sources nearing capacity (7-10 years, subject to usage and growth) – Water enabler of OCP goals – Emerging challenges/opportunities to water supply • Develop a refined solution set – Evaluate and identify (1) conservation, (2) optimization and (3) source/supply opportunities – Phased, incrementable, affordable, sustainable, resilient, flexible approach 2

Presentation Overview Water Water Supply Determine Develop a System Demand Source Solution Soultion Review Planning Needs Sets Sources and Infrastructure • Supply Needs to 2041 • Water Issues • New Source Criteria • Population and Water Use • Determine multiple • solution sets 3

Workshop Overview • Explore key elements of Solution Sets • Review broad range of choices and narrow based on feasibility • Present performance results for short-list of Solution Sets • Frame next steps for Fall direction setting 4

Solution Sets Long-term supply resiliency Policy setting and programming • • Address emerging gaps in portfolio Moderate OR Advanced reductions • • Source #2 #3 Expansion Conservation #1 NEW Invest in the Demand Planning: development of the Adopt reliable trend in water use & best suited source for reductions needs of the Commission Optimization Projects Affirm investment levels to meet levels of service to 2041 Pipe and reservoir upgrades • Meet levels of service: now + future • 5

Strategically prioritize sources using criteria that enhance our portfolio. Criteria to Prioritize Solution Sets Desirability • Consistency over • Ability to phase • Convenience to • Relative cost • Public time e.g. droughts for growing interconnect performance perception of • Operational • Cash flow and • Amount and demands water quality footprint e.g. rates severity of • License/regulatory • Stakeholder effort hazards ; risks assurances considerations conflicts 6

Total population is slightly greater than serviced population. No OCP Alignment Conservation 1. Residential High 2. ICI Demand 3. Agriculture 4. NRW Low Demand Pop. 141,000 Pop. 200,000 Abbotsford ~1.5% Growth = OCP 7

148 MLD Status Quo Leaks Growth Drought Redundancy Max capacity = 123 MLD Restrictions Currently MDD = 102MLD* Conservation Densification Efficiency * Based on four year Average 8

Capacity Portfolio High-elevation, good quality source • Generally adequate capacity Fraction of supply needs; small watershed Cannell • under normal conditions however Best for winter demands or summer • demand complement. new demands, drought and Not able to expand capacity. • turbidity spikes may affect supply Reliable, low-treatment supply all year resiliency in 7 to 10 years. • Trending water quality concerns and Ground- • higher operational footprint water Wells Distributed source to address summer • use and demands from growth. Emerging gap Able to expand source capacity. • A go-to source for unplanned events (e.g. Largest source with advanced treatment • turbidity) and planned long- Turbidity spikes and drought lowers capacity • Transmission limited by pipe size Norrish term growth. • Concerns regarding ability and cost to • expand source storage Reflects your largest asset-investment. • Able to expand source capacity. • 9

Conservation Policy setting and programming • Moderate OR Advanced reductions • Conservation Source Expansion Demand Planning: Adopt reliable trend Invest in the in water use & development of the reductions best suited source for needs of the Commission Optimization Projects Affirm investment levels to meet levels of service to 2041 10

Conservation Program Steady program with strategic add-ons. Choices High Demand 0.35% Scenario 148 MLD Status Quo Leaks Growth 135MLD Drought 0.7% Medium Demand 123 MLD Redundancy Max capacity = 123 MLD Scenario 108MLD Restrictions Conservation Currently = 102 MLD Densification Low Demand 1.2% Efficiency Scenario MDD Dictates source + system capacity and focuses Maximum conservation targets Day Demand 11

Conservation Blueprint Use Blueprint to Design Water Efficiency Plan Resident NRW ICI Agriculture  Target 0.35%/yr  10% overall in 25 years -10% -15% -5% +9MLD  Low-Impact Development  Guelph e.g. Blue Built Certification Status Quo Most efficient hardware in new buildings • Low land-scape requirements • Incentives for reuse and rain water harvesting •  Maintain Restrictions High Maximize AMI data to reduce peaks and lower MDD Demand MDD Target = 135MLD in 2041 • Redesign setpoints for messaging •  Expand Social Marketing Direct ties to AMI • Messages, incentives and education to suit major customer • groups: residential, Industrial-Commercial, Institutional and Agriculture Medium  Frequent Billing Demand Gradually transition to tiered price-structures • Direct ties to Social Marketing •  Pursue Universal Metering with grants  Strategic Rebates to Suit Customer Patterns Low-income/rental rebate update • Capacity buyback programs • Built in leak detectors • At time of development/redevelopment 12 •

Optimization Source Expansion Conservation Invest in the Demand Planning: development of the Adopt reliable trend best suited source in water use & for needs of the reductions Commission Optimization Projects Affirm investment levels to meet levels of service to 2041 Pipe and reservoir upgrades • Meet levels of service: now + future • 13

Only 90% of source capacity can be used because of unoptimized system. Optimization Projects Allow for full access to Optimization Affirm investment source potential and levels to meet Projects levels of service to prevent issues with 2040 pressure/supply during maximum day use. Full Capacity Optimization projects remove unusable capacity transmission bottlenecks for current and future customers. 14

Optimization Projects Optimization Affirm investment levels to meet Projects levels of service to 2040 Water utilities that serve growth communities are • regularly improving the efficient transmission of water to key areas Timing and levels of service dictate investments • Optimization projects help to: • Meet demands during max days and average days (one source • out of service) e.g. no drop in reservoir levels Provide equitable access everywhere e.g. pressures • Provide redundancy e.g. Norrish Supply Line pipe failure • Meet the needs of future customers • Provide reliable source operations e.g. Norrish • 15

Optimization Projects to Review Order of Change title Magnitude Purpose (Costs) Relieve existing pipe bottleneck Norrish Creek Pipeline Twin (~6km) $35M to meet provide +12 MLD Maximize source capacity to Norrish Creek Pipeline Twin (~9km) $50M provide an additional +30 MLD Meet ADD with Cannell out of Mission Zone 4 Reservoir $6-12M service 14 MLD pump station to convey Maclure Booster Station $4-5M groundwater flows to Mission for system redundancy 16

Source Expansion Long-term supply resiliency • Address emerging gaps in portfolio • Source #2 #3 Expansion #1 NEW Conservation Invest in the development of the Demand Planning: Adopt reliable trend best suited source for in water use & needs of the reductions Commission Optimization Projects Affirm investment levels to meet levels of service to 2041 17

* Based on High Demand Scenario of 0.35% reductions per year Performance Capacity Portfolio 2016 2041 2051 • Supply Max Daily Demand – Current @ 102 MLD + 12 MLD +29 MLD – 2041 @ 135 MLD* *Requires optimization works to maximize existing source supplies or Emerging gap expansion of new source. To meet source supply service levels with redundancy requires a new • Supply Average Daily Demand source for up to 25MLD before 2041. – with one source out of service  1-6 months 2016 2041 2051 – e.g. turbidity, drought  achieves redundancy – Current @ 67 MLD – 2041 @ 86 MLD + 25 MLD +32MLD Recent efforts to conserve, optimize and plan for new The water supply gap projection has customers has reframed the search for a complementary reduced significantly from 2011. source that bolsters a more resilient system. 18

2011 Long List of Source Options Source Review Capacity Portfolio AMWSC reports applied 8 criteria to funnel the choices. Feasibility: Pre-Screen the Long List 19

Feasibility Pre-Screen the Long List Critical Drawbacks Active Watershed No Eco-Political Lowest Engineering with High Upfront Feasibility Feasibility Costs Temporary Storage • Wastewater Reuse • (Unreliable for medium-term) Chilliwack Lake • Hayward Lake Connect to • • (Leachate concerns) MetroVancouver Harrison Lake Fraser River Intake • • Connect to Clearbrook • (Storage requirements for high turbidity events, contamination concerns) 20

Source Review Capacity Portfolio New Collector Wells Miracle Valley Stave Lake Max-Norrish Groundwater (Fraser River) 21