Water Source / Supply Study Moving Forward Joint Shared Service - - PowerPoint PPT Presentation
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
Joint Shared Service Committee January 11 2018
2
3
4
Water System Review Water Demand Planning
Evaluate Solution Sets
Supply Source Needs Develop a Solution Set Refine Solution Set
solution sets
Phase 2 Phase 1
5 Refine Solution Set Test Well Construction and Detailed Investigations Project Definition Report (Grant Ready) Environmental Assessment & Permitting Procurement & Execution
Phase 2 2018 Phase 3 2019‐ 2022
location
yield
needs
strategy
geotechnical investigation of Potential locations to determine feasibility
Public Engagement
Assessment
Consultation
Management or
6
Conservation
Demand Planning: Adopt reliable trend in water use & reductions
Affirm investment levels to meet levels of service to 2041
Invest in the development of the best suited source for needs of the Commission
NEW #1 #2 #3
Current Max Day Demand 102 MLD Current System Capacity 123 MLD By 2041 an additional 25 MLD water is required. New source needs to be implemented in the next 7 to 10 years to ensure resiliency of the water system
7
Two Significant Optimization Projects required to deliver on targeted levels of service. Zone 4 Reservoir + Dickson Lake Storage Optimization
High Demand Scenario
Moderate reductions for all customers by enhancing current program
13 MLD reduction from Status Quo
Proceed with preliminary development of the Collector Well System
+25MLD by 2041 +33 MLD by 2051
Conservation Optimization Source Expansion
8
9
4 3 2 1
Fine Sand at most locations. Groundwater extraction potential highest at Site 4.
Measured by hydraulic conductivity
Yield Quantity
More available water Less available water
10
– Water Quality parameters (mg/L)
CGDWQ MAC/AO 1 2 3 4 Dissolved Iron ‐‐/0.3 38 37 10 5 Dissolved Manganese 0.1*/0.02* 1.9 1.2 1.5 1.0
MAC = Maximum Acceptable Concentration AO = Aesthetic Objective * Under review and updating – proposed values.
These can change after pumping from a test well.
11
12
4 3 2 1
Water quality best at Site 4. Some treatment required at all sites (expectedly). Water quality to be verified.
Water Quality
More available water Less available water Better water quality Worse water quality
13
City has experienced river bank erosion concerns adjacent to sites 1, 2 and 3.
River Bank Erosion
River Bank Erosion Concerns 4 3 2 1
14
» Highest estimated hydraulic conductivity » Most favourable water quality » Least exposure to river bank erosion concerns
15
Mission Abbotsford Proposed Collector Well Fraser River
(approx. water level)
16
New Collector Well Transmission Main
17
Collector Well (25 ML)
Collector Well Expansion (50 ML)
2020 2041
Capital Operating NPV
$68M $17M $74M $8M $0M $7M $76M $17M $81M
Water Main/ Power Length Increase Source w/ Treatment
Total
35% Contingency
2018
18
19
20
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.
21