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Infiltration and Inflow Reduction Program Plan
Review and Approval of Professional Services Commission Meeting September 12, 2019
Infiltration and Inflow Reduction Program Plan Review and Approval of - - PowerPoint PPT Presentation
Infiltration and Inflow Reduction Program Plan Review and Approval of - - PowerPoint PPT Presentation
Infiltration and Inflow Reduction Program Plan Review and Approval of Professional Services Commission Meeting September 12, 2019 Infiltration and Inflow Reduction Program Plan There is no one-fits-all approach or easy fix for infiltration and
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Best Practices for I/I Programs
- Structured collaboration
throughout the program lifecycle
- Includes addressing I/I from
private property sources
- Consistent and ongoing
public education and
- utreach programs
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Sources of Infiltration and Inflow
Over 50% of I/I is from private property
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Sewer Length Comparison MMSD Gravity Sewer = 95 miles Local Mains = 1,400 miles Laterals Estimate = 1,600 miles
Sources of Infiltration and Inflow
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Daily Flow to NSWTP = 40 MGD
- Daily Wastewater Flow = 34 MGD
Daily Infiltration = 6 MGD
Infiltration in District Service Area
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Inflow Examples within District Service Area
0.5 1 1.5 2 2.5 3 3.5 Jul-18 Aug-18 Sep-18 Oct-18 Nov-18 Dec-18 Flow (MGD)
PS17
2 4 6 8 10 12 Jul-18 Aug-18 Sep-18 Oct-18 Nov-18 Dec-18 Flow (MGD)
PS16
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Collaboration with Customer Communities and Public Outreach
Years 1-2 Quantify I/I Program Framework
I/I Reduction Plan Development and Evaluation
Years 3-5 Establish metrics Policy changes
Implement I/I Projects
Years 6-25+ Evaluate I/I reduction Modify program based
- n results
I/I Program Timeline
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Project Scope of Work
District’s Role
CMOM
Financial Incentives and Funding Sewer Use Ordinance Public Education and Outreach
Flow Data Analysis
Discuss impacts to:
- District
- Our customer
communities
- Private property
Outcomes:
- Framework for Program
- Implementation Strategy
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Advertising and Proposal Results
- Advertised in July
- 13 consulting firms contacted
- 2 proposals received
- Committee selection: Brown and Caldwell
Consulting Firm Proposal Amount Brown and Caldwell $ 99,910 Stantec $ 100,000
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Why Brown and Caldwell?
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Why Brown and Caldwell?
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Next Steps
- Part of the Collection System
Facilities Plan
- Consider 3 program options
- Form a Technical Advisory
Committee
- Check back in Spring 2020
with the Commission to present stakeholder input on program options and recommendation
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Recommendation
- Award the contract to
Brown and Caldwell
- Per the Resolution
- Work to begin October