contingency planning for loss of water supplies jim smith mbci resilience programme manager
TRANSCRIPT
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Contingency planning for loss of water supplies
Jim Smith MBCI
Resilience Programme Manager
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A reminder…
• Gloucestershire 2007
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TewkesburyTewkesbury
CheltenhamCheltenham
GloucesterGloucester
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Timeline
• Sun 22nd July: Mythe works shut down• Tue 24th July: 140,000 properties without supply• Fri 27th July: Non drinking water supply restored
to 10,000 properties• Thu 2nd August: Non drinking water supply restored
to entire area• Fri 3rd August: Moved from do not drink to boil
water notice• Tue 7th August: Safe to drink notice issued
A total of 17 days between the works being shut down and supplies being fully restored
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Facts and figures
Bottled water:
• 150,000 litres supplied 23 July
• 3m litres a day available by end 24 July
• 15 local distribution centres
• 5m litres available at peak
Bowsers & tankers:
• Over 90 tankers
• 1,100 bowsers deployed
• Largest number ever used in
a single incident in the UK
• Average three fills a day
• 23,000 water quality tests
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How to stop it happening again• Improvements at 6 Water Treatment
Works and 73 Borehole Sources based on EA National Flood Risk Assessment
• Investment in strengthening the strategic grid
• Creation of Alternative Supplies plans
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Alternative Supplies plans
• 6 sites identified as a single source of supply
• Comprehensive plans produced to provide alternative supplies to these areas
• Regulatory minimum of 10 litres per head per day, our plans are based around providing 20 litres
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Leicester – Melbourne WTW
An overview of plan contents
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Area affected
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How much water is required
Melbourne - Volume Requirement
0
1000000
2000000
3000000
4000000
5000000
6000000
D-36 D-24 Day 1 Day 2 Day 3 Day 4 Day 5
Period
Lit
res
Deployed via bottles
Deployed via bowsers
Deployed via Tankers withTbars
STW requirement (20L)
Regulatory requirement (10L)
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Where to source it from
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Where to deploy bowsers
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Where to deploy bottled water
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Supporting vulnerable premises
• Creation of contingency plans with hospitals and prisons
• Tanker resources factored into plans for these sites
• Other types of vulnerable premises identified
• Provision via bottled water or bowsers
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Supporting vulnerable individuals
• Register of vulnerable customers
• Voluntary registration through our access team
• More information at:www.stwater.co.uk/household
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Over the course of a year the average Severn Trent customer
has an uninterrupted water supply for
364 days, 23 hours and 42 minutes