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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


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



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





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


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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