TACOMA WATER RESILIENCY Providing Clean, Reliable Water Now And In The Future.
Coastal Resiliency & Adaptation in the Water and ......•Aging infrastructure requires frequent...
Transcript of Coastal Resiliency & Adaptation in the Water and ......•Aging infrastructure requires frequent...
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Coastal Resiliency & Adaptation in the
Water & Wastewater Industry
Gary McSmith
Assistant Director of Engineering
Cape Fear Public Utility Authority
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Cape Fear Public Utility Authority
• Largest provider of water and wastewater services in New Hanover County.
• Serves approximately 200,000 individuals and businesses, including New Hanover Regional Medical Center and the University of North Carolina Wilmington.
• Source waters: Cape Fear River, Castle Hayne and Peedee Aquifers
• Maintains over 2,000 miles of water and wastewater pipes and approximately 150 pump stations.
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What Will the Future Bring?
• Coastal Communities should expect:
• More frequent extreme weather events
• More intense precipitation events
• Sea-level rise and saltwater intrusion
• Nuisance flooding
• Temperature increases
• Challenge: How do we prepare for an uncertain future when capital investment planning for water and wastewater infrastructure requires looking 30-50 years down the road?
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Impacts on Water and Wastewater Systems
• Source water quality and quantity may deteriorate.
• Water infrastructure may be at risk from sea-level rise and more frequent flooding events.
• Temperature increases may affect working conditions for staff.
• Impacts from multiple extreme weather events may deplete financial resources and impact rate affordability.
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Changes in Water Quantity & Quality
• Increasing temperatures algal blooms and evaporation
• More precipitation events upstream runoff and nutrient loading
• Sea-level rise salt water intrusion into aquifers
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Water Infrastructure at Risk
• Pump stations tend to be located in lowest areas of townmay be affected by sea-level rise.
• Flooding and more intense precipitation events sanitary sewer overflows.
• More extreme weather events loss of power water treatment is very energy intensive.
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• Aging infrastructure requires frequent maintenance and repair work • Approximately 590 miles of water and sewer piping that is 40+ years old
• Emergency breaks and SSOs can happen at any time.
• During the hottest days of the year, staff can be at risk for dehydration and heat injury.
Temperature Increases & Staff Safety
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Financial Challenges
• Resiliency may mean: • Financial planning for redundant infrastructure
• Investment in alternative energy supplies
• Investment in more treatment technology
• Reserves for multiple extreme weather events
• Utilities with diminishing customers bases or increasing costs of living may struggle with rate affordability as they balance resiliency work and the investments needed to keep the system running today.
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Increasing Resiliency at CFPUA
• In 2013, CFPUA teamed up with City of Wilmington, New Hanover County and EPA to assess our vulnerability to various scenarios of sea-level rise and flooding.
• Informed by CFPUA’s asset management program and previous work by NCDEM on modeling for various scenarios.
• The report made a number of suggestions to help our systems adapt to these hazards:
• Raising critical and vulnerable facilities/assets• Backflow prevention• Establish alternative power supplies • Increase system capacity• Install green infrastructure
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CFPUA Progress on Adaptation Strategies
• Asset management program
• Introduced strategic interconnects and redundancies
• Successful backflow program
• Performing elevation study with new drone program
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The American Water Infrastructure Act (AWIA)
Passed in 2018, the AWIA requires water utilities to assess natural disaster vulnerability.
With this assessment, CFPUA will also evaluate climate change vulnerability.
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CFPUA’s Journey Toward Resiliency Continues…
• Water reuse and source water diversification
• Formation of an Energy Team to understand organizational energy usage and work toward energy use reductions
• Upstream partnerships
• Drought planning
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Questions?
Gary McSmith
Assistant Director of Engineering
Cape Fear Public Utility Authority