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Contingency planning for loss of water supplies. Jim Smith MBCI Resilience Programme Manager. A reminder…. Gloucestershire 2007. Tewkesbury. Cheltenham. Gloucester. Timeline. Sun 22 nd July: Mythe works shut down Tue 24 th July: 140,000 properties without supply

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contingency planning for loss of water supplies

Contingency planning for loss of water supplies

Jim Smith MBCIResilience Programme Manager

a reminder
A reminder…
  • Gloucestershire 2007
slide7
Tewkesbury

Cheltenham

Gloucester

timeline
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

facts and figures
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
how to stop it happening again
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
alternative supplies plans
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
leicester melbourne wtw
Leicester – Melbourne WTW

An overview of plan contents

slide16
How much water is required

Melbourne - Volume Requirement

6000000

Deployed via bottles

5000000

4000000

Deployed via bowsers

Litres

3000000

Deployed via Tankers with

2000000

Tbars

STW requirement (20L)

1000000

0

Regulatory requirement (10L)

D-36

D-24

Day 1

Day 2

Day 3

Day 4

Day 5

Period

slide22
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
supporting vulnerable individuals
Supporting vulnerable individuals
  • Register of vulnerable customers
  • Voluntary registration through our access team
  • More information at:www.stwater.co.uk/household
slide24

Over the course of a year the average Severn Trent customer has an uninterrupted water supply for364 days, 23 hours and 42 minutes

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