March 2012 - Page 2 of 2 -

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Door-to-door campaign by Severn Trent water shows encouraging results

Friday, March 16th, 2012

Severn Trent Water is stepping up their public awareness campaign about what can and what can’t be disposed of in the sewer system, after a sewer network in Burton was dubbed the ‘worst in the Midlands’. The sewer company are now calling on all residents to consider what they dispose of down their drains after fat, grease and cooking oil blocked the path of waste under a Burton street. Severn Water has even released pictures which highlight the disgusting mess in the hope customers will take note. The company are in the middle of a ‘door-to-door’ campaign, which is getting an encouraging response. However their senior network technician, Samantha Dalton, commented in the Burton Mail:

“Most customers don’t realise the problems that this can cause, “It’s amazing to see the pictures from our recent work, but it would be very disappointing to see this build up again. “We have found some businesses, for example one pizza restaurant, putting vast quantities of fat down the sink which is compounding the issue.”
Homeowners are being reminded that fats, sanitary wear, nappies, contraceptives and make up wipes should all be disposed of in the general waste instead of being flushed down the toilet.

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Chamber Wharf site to be used for the Thames Tunnel

Thursday, March 15th, 2012

After a nine month campaign by local residents, a site in Rotherhithe has been given small park village green status, scuppering Thames Water’s plans to use the site as part of its super-sewer scheme. King’s Stairs Gardens now has extra protection after Southwalk Council successfully used the Commons Act 2006 to effectively make the eight-acre site a village green. Although King’s Stairs Gardens featured in phase one of the Thames Water super-sewer consultation, it was downgraded from one of their ‘preferred’ sites. This was in part due to Thames Water preferring to use brownfield field sites for construction, instead of using greenfield sites. The Thames Tunnel needs to be constructed to stop raw sewage entering the River Thames at times of heavy rainfall. Currently over 39 million tonnes of this sewage ends up in the river every year, after being discharged though overflow outlets along the river bank. The new super-sewer, which will be built roughly following the path of the river, will collect the excess sewage and take it to upgraded sewage works where it will be processed. The granting of the village green status for King’s Stairs Gardens will mean that Thames Water will most likely use the Chambers Wharf site instead.

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Trenchless technology pipe repair

Wednesday, March 14th, 2012

Drainage problems can be tricky to solve, that is unless you have your drains assessed and then repaired by a local drainage company in London. Drainage companies in London perform all kinds of maintenance tasks, from drain jetting to root removal. However, in many cases the drain which leaves your home may be damaged and require replacing or extensive repairs. The traditional method of solving a broken drainage pipe is to excavate the pipe and replace the pipe with new. This requires machinery, sand, aggregate, back filling of the excavated material and then repair of the pavement or the driveway. All this can be costly and time consuming, not to mention the mess which can be caused to the homeowner’s garden. The new method of replacing a drainage pipe is to insert a liner into the damaged drainage pipe so it is restored to a working condition. All this requires is an entry and exit point for the liner and hence this method generates less mess than the traditional excavation method. Sometimes if the area of pipe damage is small, a small epoxy resin liner can be blown into the damaged pipe. The liner is then inflated and the resin sets hard to the internal pipe diameter, repairing the pipe in situ. This method does not require any excavation as a manhole cover can be used as the access point where the liner is inserted.

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Storm tank blockage in Coulsden causes upset to local residents

Monday, March 12th, 2012

Sewer cleaners had their work cut out when a sewer tank became blocked in Coulsdon and sewerage seeped into the gardens of several homeowners. The raw sewage started to seep onto Reddown Road on the 14th of Feb and drain cleaners in London were immediately called to the site. The sludge and sewerage stretched the distance of ten houses and caused serious damage to homeowner’s property. One resident told the Coulsdon and Purley Advertiser:

"It was disgusting, you could smell it all the way through the house. It made me want to be sick."
Thames Water attended the site and drain cleaners spent ten day tackling the issue,which was ciuased by items in the drain blocking the storm water tank inlet. A spokesperson for Thames Water stated:
"We are really sorry to the customers impacted. "Sewer flooding is truly miserable and we are doing everything we can to get their homes back to normal as soon as possible. "The flooding has been caused by a blockage in a storm tank of rags and cooking fat – things that should not be poured down the drain. "We can assure residents that we are doing everything we can to try and prevent this happening again in the future."

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Thames Water close road in North Hinksey

Friday, March 9th, 2012

Residents in North Hinksey are unhappy that a section of North Hinksey Lane will remain closed until late April while Thames Water carries out essential sewer repairs. North Hinksey Lane will see a rolling road closure until the end of April, meaning that residents will only be able to drive through the works at certain times of the day. About 100 residents will be affected by the essential flood prevention scheme, which will see road closures between 8am and 5pm every day. Thames Water has provided a temporary car park for the residents to park their vehicles in while the works are carried out. There was some indication that a relief rood may have been provided while the sewers pipes were replaced but this did not come to fruition. Thames Water spokesperson Natalie Slater confirmed that a relief road had been mentioned but residents were never promised this would happen, she said:

“We’ve done our best to minimise disruption while still getting the work done as efficiently as possible. We’re really sorry for the disruption this will cause, but it is essential we get this work done.”
Local businesses will be able to apply for compensation due to loss of earnings while the works are carried out.

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Salisbury sewer repairs complete

Thursday, March 8th, 2012

A century old sewer system has been completed renovated thanks to trenchless technology. The sewers underneath Salisbury had started to show signs if disrepair, which is not surprising considering they were installed over a century ago. The sewer system had a complete inspection last year, when remote controlled CCTV survey equipment was put into the sewer network. Just under 500m of sewer pipes had to be replaced or repaired, while road closures and traffic management systems were put in place on the city’s roads. If the repairs were not carried out, Alex Aulds from Wessex Water said that there was the distinct possibility of a sewer collapse. Most of the sewer system was repaired using pipe lining technology, where a resin liner was inserted into the damaged section of pipe and then cured using ultra-violet light. The result was a new pipe within the old pipe and a significant decrease in the time it would have taken if the sewer system would have had to be dug up and replaced. Work on the sewers began in mid-January and is now complete. Mr Aulds confirmed:

"The sewers now have an expected longevity of 100 years and the work will ensure that any future risk of collapse or damage is significantly reduced,"

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Removing leaf debris using jetting

Wednesday, March 7th, 2012

When the cold weather starts to wane and the sun starts to feel arm on our backs again, it’s the perfect time to get out into the garden. There will be lots of different maintenance tasks to do in the garden in the spring, with most making ready for the glorious summer months. Things you might consider doing include - jet washing your patio or driveway, giving your decking a fresh coat of preservative, cleaning out the shed, painting the outside of your home, doing any structural changes to the garden before plants start to flower and clearing all the debris from the garden including the fallen leaves from last winter. While all the above jobs are important there is one which stands out, even though it might not come at the top of your list. Many people want their garden and homes to look great but fail to perform appropriate maintenance on their property, resulting in expensive repair costs. The first job which should be carried out is of course the removal of leaf debris from the garden, from the gutters on your house and from the waste water gullies around your home. Leaf debris is one of the main reasons for blocked drainage at this time of the year. And in most cases drain cleaners in London have to attend the property to jet the drain to get it working properly again.

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Using trenchless technology to remove roots from drainage pipes

Tuesday, March 6th, 2012

One of the most common problems faced by drainage professionals is root intrusion into drainage pipes. Roots work their way into our drainage by finding small cracks or fissures in the pipe’s surface. When they enter the drain they quickly multiply due to the easy to access source of water and can eventually stop water flowing down the drain completely. Drainage cleaners in London use state of the art technology to combat these blockages so the drains don’t have to be excavated for the roots to be removed. To remove roots from drainage pipes drain cleaners in London use a type of trenchless technology which removes the roots without excavating the drain. They simply insert a spinning root cutter into the drainage system which mechanically cuts the roots back to the internal diameter of the drainage pipe. To stop the roots growing back, the drain cleaners in London then insert a liner into the drainage pipe which when set provides a barrier against further root growth. Root intrusion into drainage pipes is becoming a big problem in London as the city’s drainage gets older, but the drain cleaning experts in the city have the tools at their disposal to stop the roots in their tracks.

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Drain blocked by concrete in Urmston, Manchester

Sunday, March 4th, 2012

When drainage engineers usually investigate blocked sewers they commonly find the build up of fat or other common sewer debris is the cause of the sewer problem. However, rarely they sometimes find something which cannot be removed by common drain unblocking techniques. A road in Urmston, Manchester is expected to remain closed for around six weeks after a sewer was completely blocked by concrete. The 25 metre section of pipe was investigated by local waste water company United Utilities after residents complained that their cellars were flooding. Upon further investigation using CCTV technology, the water company found that the sewer was almost completely blocked by concrete, which had been poured down the sewage pipe. Drainage engineers now face the tough challenge of removing the concrete from the 21 inch diameter sewer, a task that they estimate may take up to around two months to complete. The section of sewer damaged runs under Flixton Road in the town centre. When a sewer is blocked by standard debris drain unblocking techniques such as drain jetting can be employed by the drainage experts. However in cases such as the above there is little the sewer engineers can do except excavate the damaged sections of pipes.

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Storm water tank to stop sewer flooding in Nafferton

Friday, March 2nd, 2012

Sewer flooding in the East Riding village of Nafferton will soon become a thing of the past thanks to a huge waste water storage tank which will hold sewage until it can be treated at a nearby sewage treatment works. Currently at times of heavy rainfall there is the possibility that the sewers in Nafferton won’t be able to cope with the increased amount of waste water they see. As a result, the installation of a holding tank will allow the excess water to be held until it is treated. The new tank is going to be installed next to the pumping station in the village and will be able to hold 72,000 litres of water. The work is expected to be completed by the end of April and is expected to cost in the region of £180,000. The project manager for Yorkshire Water, Craig Jakeman said:

“More intense storms resulting from climate change, increased housing developments and the paving over of green spaces are all increasing the amount of surface water entering our sewers. “This combined with people disposing of inappropriate waste is contributing to an increased risk of sewers flooding homes and properties.”

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