water emergency lessons learned by owasa...owasa emergency interconnections – city of durham –...
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![Page 1: Water Emergency Lessons Learned by OWASA...OWASA Emergency Interconnections – City of Durham – Town of Hillsborough – Chatham County Water Supply Cane Creek Reservoir University](https://reader034.vdocuments.us/reader034/viewer/2022042919/5f60968337ed257cda32dc24/html5/thumbnails/1.jpg)
NC AWWA-WEA 97th Annual ConferenceNovember 13, 2017
Water Emergency Lessons Learned by OWASA
Community owned utility providing water, wastewater and reclaimed water services to the Carrboro-Chapel Hill community.
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Raleigh
Charlotte
Greensboro
Fayetteville
Wilmington
Chapel Hill/Carrboro, NC
Durham
Orange Water and Sewer AuthorityCommunity owned utility providing water, sewer and reclaimed water services to the Carrboro-Chapel Hill community in North Carolina.
Asheville
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OWASA Emergency Interconnections
– City of Durham
– Town of Hillsborough
– Chatham County
Water SupplyCane Creek ReservoirUniversity LakeQuarry ReservoirJordan Lake (backup supply via mutual aid)
Jones Ferry Road Water Treatment Plant 20 MGD
Reclaimed Water 2.0 MGD
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Breaking News…February 3, 2017
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Key Take-aways• Be prepared locally and regionally for the “what-ifs”
• Interconnection of drinking water systems important for resiliency
• National Incident Management System (NIMS) and your local and
regional partners are essential
• Communications – be open, honest and transparent
• After Action Reviews – powerful continuous improvement tool
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May 2011, OWASA became the 9th water utility in US to receive the “Excellence in Water Treatment” award
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February 5February 4February 3
Normal Min. Storage
Emergency Storage
Mill
ion
Gal
lons
of S
tora
ge
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February 5February 4February 3
Water Plant Shutdown
Thu 3:22 PM
Normal Min. Storage
Emergency Storage
Mill
ion
Gal
lons
of S
tora
ge
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February 5February 4February 3
Water Plant Shutdown
Thu 3:22 PM
Primary Durhaminterconnect
startedThu 5:09 PM
Normal Min. Storage
Emergency Storage
Mill
ion
Gal
lons
of S
tora
ge
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February 5February 4ary 3
Water Plant Shutdown
Thu 3:22 PM
Primary Durhaminterconnect
startedThu 5:09 PM
12" Main break
Fri 10:13 AM
Normal Min. Storage
Emergency Storage
Mill
ion
Gal
lons
of S
tora
ge
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February 5February 4
Water Plant Shutdown
Thu 3:22 PM
Primary Durhaminterconnect
startedThu 5:09 PM
12" Main break
Fri 10:13 AM
OWASA issues "Do Not Use, Do Not
Drink" News Release
Fri 11:30 AM
Orange County Health Department issues "Do Not Use,
Do Not Drink"directive
(Critical Care –Essential Use)Fri 2:00 PM Normal Min. Storage
Emergency Storage
Mill
ion
Gal
lons
of S
tora
ge
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Water Plant Shutdown
Thu 3:22 PM
Primary Durhaminterconnect
startedThu 5:09 PM
12" Main break
Fri 10:13 AM
Orange County Health Department issues "Do Not Use,
Do Not Drink"directives
Fri 2:00 PM
Orange County Health Department lifts “Do
Not Use” “Do Not Drink” directive
Sat 2:24 PM
Water Plant in Operation
Sat 6:37 PM
Normal Min. Storage
Emergency Storage
Mill
ion
Gal
lons
of S
tora
ge
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• National Incident Management System (NIMS)
• Communication Tools
OC Alerts (reverse 9-1-1)
News Releases/Media
Joint News Conferences
Call center, tweets, website
Non-English; special needs population
• Distribution of bottled water and other community resources
• Response and recovery resources
County Emergency Operations Center(Orange County; Towns of Chapel Hill & Carrboro; UNC; Health Department; OWASA; Others)
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• Coordinated and comprehensive response
• Distribution of bottled water and other community resources
• Communication Tools
OC Alerts (reverse 9-1-1)
News Releases/Media
Joint News Conferences
Call center, tweets, website
Non-English; special needs population
County Emergency Operations Center
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CommunicationsBe open, honest and transparent – to be trusted
• Share information quickly, openly and honestly
• Work with news media to get your message out
• Keep partners and employees fully informed; common message
• Routine updates for all stakeholders
• Invite feedback and review
• Independent review of fluoride overfeed and water main break
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Accidental Fluoride OverfeedCH2M Report (February 10, 2017)
• Primary Causeo Unintentional operator keystroke increased pump feed rate to higher than desired level
o Subsequent adjustment made 12 seconds later, but pump did not respond as expected
• Secondary Cause o During subsequent routine inspection, operator failed to take timely corrective action
No water w ith higher than normal fluoride levels left the treatment plant
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12-Inch Water Main Break – February 3, 2017
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Water Main BreakAECOM Report (February 10, 2017)
“… it (the pipe) was set up to fail 44 years ago on the day of its
installation”
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www.owasa.org
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After Action Review (AAR)
1. What did we set out to do?
2. What actually happened?
3. What went well?
4. What can be improved?
Powerful organizational learning tool
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Approved Action Plans for Improvements: (following public input)
• Related to water main break (March 23rd)
• Reliability and safety of fluoride feed system (April 13th)
• Strategic communication in OWASA-related emergencies (April 27th)
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0
2500
5000
7500
10000
12500
15000Average Jan 2017 System Demand2-5 February 2017 System Demand
Syst
em D
eman
d (g
pm) Joint News Release
"Do Not Use" lifted, continued
conservationSat 2:30 PM
OWASA News Release,"Do Not Use" declared
Fri 11:30 AM
OWASA News Release, advising and requesting
conservationThu 6:00 PM
Request for conservation lifted
Sun 9:00 AM
Thu Fri Sat Sun
Customers Reduced Demand by ~37%
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Key Take-aways• Be prepared locally and regionally for the “what-ifs”
• Interconnection of drinking water systems important for resiliency
• National Incident Management System (NIMS) and your local and
regional partners are essential
• Communications – be open, honest and transparent
• After Action Reviews – powerful continuous improvement tool
![Page 25: Water Emergency Lessons Learned by OWASA...OWASA Emergency Interconnections – City of Durham – Town of Hillsborough – Chatham County Water Supply Cane Creek Reservoir University](https://reader034.vdocuments.us/reader034/viewer/2022042919/5f60968337ed257cda32dc24/html5/thumbnails/25.jpg)
Community owned utility providing water, wastewater and reclaimed water services to the Carrboro-Chapel Hill community.
Ed KerwinExecutive Director
www.owasa.org