Water Source / Supply Study Moving Forward Joint Shared Service Committee January 11 2018
Purpose of the Source Supply Study • Review and prioritize known sources – 3 primary sources nearing capacity – Water enabler of OCP goals • Develop a refined solution set – Conservation, Optimization, Source Expansion – Phased, incrementable, affordable, sustainable, resilient, flexible approach 2
Purpose of Today’s Presentation • Provide an Update on Phase 2 – Investigative drilling program – Water quality analysis • Achieve Direction on Next Steps – Test Well Construction – Project Definition Report 3
Process Overview – Looking Back Phase 2 Phase 1 Water Water Supply Develop a Refine Evaluate System Demand Source Solution Set Solution Sets Solution Set Review Planning Needs • Sources and Infrastructure • Supply Needs to 2041 • Water Issues • New Source Criteria • Population and Water Use Determine multiple • solution sets 4
Process Overview – Looking Forward Phase 3 2019 ‐ Phase 2 2018 2022 Public Engagement Test Well Project Environmental Construction Definition Refine Procurement & Assessment & and Detailed Report Solution Set Execution Permitting Investigations (Grant Ready) • Preform • Prove out best • Conceptual design Water license • Design Build or • geotechnical location • Funding strategy • Environmental • Construction investigation of • Confirm long term • Procurement Assessment Management or Potential locations yield strategy • Fraser Health • Design Bid Build to determine Confirm treatment Grant application • • • First Nations feasibility needs Consultation 5
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 Current Max 102 MLD Day Demand Commission Current System 123 MLD Capacity By 2041 an additional 25 MLD water is required. Optimization New source needs to be Projects implemented in the next 7 to 10 years to ensure resiliency of the water system Affirm investment levels to meet levels of service to 2041 Pipe and reservoir upgrades • • Meet levels of service: now + future 6
Highest Performing Solution Set: Option #1 Conservation Optimization Source Expansion Two Significant High Demand Proceed with Scenario Optimization Projects preliminary Moderate reductions required to deliver on development of for all customers by targeted levels of service. the Collector Well enhancing current System program Zone 4 Reservoir + +25MLD by 2041 13 MLD reduction Dickson Lake Storage from Status Quo Optimization +33 MLD by 2051 7
Source Expansion - Collector Well • Hydrogeotechnical Field Investigation • Yield Quantity • Water Quality Testing • Basic Treatment • Enhanced Treatment • River Bank Erosion Concerns 8
Yield Quantity 3 More available water 4 2 Less available water 1 Fine Sand at most locations. Groundwater extraction potential highest at Site 4. Measured by hydraulic conductivity 9
Source Expansion – Collector Well • Hydrogeotechnical Field Investigation – Water Quality parameters (mg/L) CGDWQ 1 2 3 4 MAC/AO Dissolved Iron ‐‐ /0.3 38 37 10 5 Dissolved 0.1*/0.02* 1.9 1.2 1.5 1.0 Manganese MAC = Maximum Acceptable Concentration These can change AO = Aesthetic Objective after pumping from * Under review and updating – proposed values . a test well. 10
Source Expansion – Collector Well • All other parameters tested below the CGDWQ: – Pharmaceuticals – Nitrates/Nitrites – Arsenic – Other metals Water quality to be re-tested after test well installation and pump testing. 11
Water Quality 3 More available water 4 2 + Less available water + 1 + Better water quality + Worse water quality Water quality best at Site 4. Some treatment required at all sites (expectedly). Water quality to be verified. 12
River Bank River Bank Erosion Erosion 3 City has Concerns experienced 4 river bank 2 + erosion concerns + 1 adjacent to sites + 1, 2 and 3. + 13
Source Expansion – Collector Well • Location #4 is most favourable for water supply potential » Highest estimated hydraulic conductivity » Most favourable water quality » Least exposure to river bank erosion concerns 14
Cross Section – Site 4 Fraser River Mission Abbotsford Proposed Collector Well (approx. water level) 15
Transmission Main New Collector Well 16
Life Cycle Costing Analysis (Update) Collector Well Capital Operating NPV Collector Well (25 ML) Expansion (50 ML) Source w/ $68M $17M $74M Treatment Water Main/ Power Length $8M $0M $7M Increase 2020 2041 Total $76M $17M $81M 35% Contingency 2018 Budget estimates improve with each new phase Updates include additional piping to secure Site 4 Prepared for treatment 17
2018 Proposed Scope of Work • Test Well Construction and Investigations (~2-4 months) – Prove out best location – Perform pump tests – Confirm long term yield – Confirm treatment requirements 18
2018 Proposed Scope of Work • Project Definition Report (~6 months) – Determine the requirements for Environmental Assessment and Permitting – Conceptual design, Updated Cost Estimates – Determine funding and procurement strategy 19
Recommendations 1. THAT Report No. JSSC 006-2018, dated January 8, 2018, from the Water Planning Engineer, regarding Joint Water Source/ Supply Study Moving Forward, be received for information; 2. THAT the Abbotsford Mission Water & Sewer Commission (WSC) Approve Public Engagement on the recommended Solution Set # 1 which includes Conservation, Optimization and a new source expansion in the form of a Collector Well; 3. THAT the Abbotsford Mission Water & Sewer Commission (WSC) approve the incorporation of Solution Set # 1 into the Joint Water Master Plan; and 4. THAT the Abbotsford Mission Water & Sewer Commission (WSC) approve proceeding with the refinement of the Solution Set #1 to Project Definition Report / Concept to be Grant Ready. 20
Questions and Further Discussion 21
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