DISTRIBUTION RECOVERY STREAM Water System Schematic

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Distribution Recovery Plan Update 09:00 29th July 2007 1 DISTRIBUTION RECOVERY STREAM Water System Schematic Estimated Volume (Ml) Trunk Mains 36 Service Reservoir 188 DMAs 38 Total 262 Treatment works Main (1883km) Service Reservoir Trunk Main Valve Valve Meter DMA DMA DMA District Metered Area (DMA) (110) Approx 1300 Properti es River (87km) (15 ) Flow started here between 1700hrs and 2100hrs, 28 th July Initial flow of 80Ml/d building to 120Ml/d over following 12 hours

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DISTRIBUTION RECOVERY STREAM Water System Schematic. Flow started here between 1700hrs and 2100hrs, 28 th July Initial flow of 80Ml/d building to 120Ml/d over following 12 hours. Trunk Main. District Metered Area (DMA) (110). (87km). Main (1883km). Treatment works. Valve. River. - PowerPoint PPT Presentation

Transcript of DISTRIBUTION RECOVERY STREAM Water System Schematic

Page 1: DISTRIBUTION RECOVERY STREAM Water System Schematic

Distribution Recovery Plan Update 09:00 29th July 2007

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DISTRIBUTION RECOVERY STREAMWater System Schematic

Estimated Volume (Ml)

Trunk Mains 36

Service Reservoir 188

DMAs 38

Total 262

Treatment works

Main (1883km)

Service Reservoir

Trunk Main

Valve

Valve Meter

DMA

DMA DMA

District Metered Area (DMA)

(110)

Approx

1300

Properties

River

(87km)

(15)

• Flow started here between 1700hrs and 2100hrs, 28th July

• Initial flow of 80Ml/d building to 120Ml/d over following 12 hours

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Distribution Recovery Plan Update 09:00 29th July 2007

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Estimated Recharge Timetable

Phase Area Properties Start date Completion Boil Drink

1 Tewkesbury 9000 27th July 28th July

1 - 5 days later depending on

quality sampling results

2

Tewkesbury / Cheltenham ruralDumbleton / Toddington / Gotherington / Broadway / Snowshill 2900 29th July

3 Quedgeley 5200 30th July

4 Bishop’s Cleeve and Prestbury 7303 30th July

5

GloucesterChurchdown, EasternAve, Longlevens,Treadworth,Abbeymead, Abbeydale,Barnwood, Tuffley, Podsmead,Sandhurst 53700 30th July

6 Cheltenham 27300 31st July

7Brockworth / Upton / Matson /Fox Elms 24200 1st August

8 Woodmancote 2500 2nd August

TOTAL 132103 5th August

All timings are estimated. All timings are liable to vary due to the unique nature of a 2,000km pipeline.

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Distribution Recovery Plan Update 09:00 29th July 2007

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Issues influencing timing

• Demand levels – filling loft tanks, taps left running, washing backlog, flood washdown, etc

• Operational issues in recharging – airlocks

• Mechanical failure of distribution assets – valves, pressure control valves, booster pumps

– Not been run for a while, may have flood damage

• Leakage– system has been discharged– floods will have caused ground movement

• Mythe production – mechanical / electrical / process failure