CITY OF ESCONDIDO 18 MARCH 2014 POTABLE REUSE PROGRAM SCOTT LYNCH, P.E .
PRESENTATION OUTLINE • Background • Planning Process • Building a Program 2
BACKGROUND 3
ABOUT ESCONDIDO Water Service Stats • 22 sq. miles • 26,000 connections • Serving 146,000 people Escondido 4
PROGRAM BASIS • Setting the Stage • 2006 & 2009 Outfall Assessments • 2009 IPR Concepts • Water shortages and rates affecting agricultural customers • Escondido’s Potable Reuse Program • 2012 Program Manager selected • Task 1: Program Feasibility & Financial Assessment • Future: Implement Program 5
OBJECTIVES Invest in Local Water & Stakeholders EVWTP Promote Rate Stability Water Supply HARRF Resource Recovery Disposal 6
KEY FACILITIES EVWTP 75 mgd HARRF 18 mgd Outfall 7
PROJECT DRIVER - OUTFALL HARFF 8
PROJECT DRIVER - OUTFALL 9
THE PLANNING PROCESS 10 Draft Work Product
DEVELOPING CONCEPTS AND COSTS Basis & Flow Allocation Modeling • How much wastewater do we have? • How much do we need to offload? • How much new water do we create? Concepts • What facilities do we need to build? • What are the individual facility costs? Cost Model • What are the compiled facility costs + financing? • What are the major considerations? Project Refinement • What refinements can be made to optimize costs? • What is the action plan for the proposed program? 11
PLANNING PROCESS SYSTEMS AND KEY QUESTIONS Water Recycled Water Wastewater HARFF Where do we have Where do we need What assets do we have? recoverable resources? supplies? What markets exist? 12
FLOW ALLOCATION MODEL PROCESS Inputs Flow Tables Results Outfall Results NPR Database Wastewater Flows & Storms System Flows 13
BUILDING A SUCCESSFUL PROGRAM NPR/AG APPROACH 14
NPR/AG OPPORTUNITIES Proposed Brine NPR Extension & Ag Pipeline Membrane Plant Existing NPR HARRF 15 Draft Work Product
NPR/AG – WET WEATHER STORAGE 16 Draft Work Product
ASSESSING NPR/AG RESULTS Results NPR/Ag Concept New Pond Use MF/RO HARRF 17 Draft Work Product
BUILDING A SUCCESSFUL PROGRAM POTABLE REUSE 18
POTABLE REUSE OPPORTUNITIES AWPF? Ag Membrane Decentralized (AMP) or EVWTP Plant Centralized (HARRF) HARRF 19 Draft Work Product
OPTIMIZING THE SOLUTION Centralized Decentralized RO all or Portion BNR all or Portion Conventional MBR Hybrid 20 Draft Work Product
OPTIMIZING THE SOLUTION Centralized Decentralized Conventional MBR Hybrid 21 Draft Work Product
PULLING THE PIECES TOGETHER AWPF AMP MBR HARRF 22 Draft Work Product
PROGRAM RESULTS IPR/DPR New Use Pond Outfall okay deferral met 23 Draft Work Product
BUILDING A SUCCESSFUL PROGRAM PROGRAM PRO FORMA 24
RESOURCE UTILIZATION • Diversifies water portfolio • Generates revenue for the City • Helps stabilize rates 25 Draft Work Product
THE JOURNEY AHEAD HAS TWO PATHS… 26 Draft Work Product
FULL FINANCIAL ANALYSIS – CASH FLOW 1. Which approach is better financially? 2. What are the affordability impacts? Deferred Expenditures Cumulative Cash Flow Post-Capital Revenue Reuse Program Savings Outfall Years 27 Draft Work Product
ACKNOWLEDGEMENTS HARFF • Acknowledgements • City of Escondido • Black & Veatch • Brown and Caldwell • Dr. Michael Welch • Dr. Shane Snyder 28
THANK YOU! AWPF AMP MBR HARRF
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