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Another embankment failure – future of Jubilee River and other flood alleviation schemes under review?

Posted on December 27, 2024December 28, 2024 by ecwlarcombe

Previous bank protectionThe Jubilee River bank downstream of the Taplow Flow Control Structure has failed yet again.  You can see a video of how a helicopter was used to place the bags of stone here.

I suspect that the future of the Jubilee River, the River Thames Scheme, the Datchet to Hythe End Flood Improvement Measures project and maybe even the Oxford Flood Alleviation Scheme could all be reviewed as a result of the latest Jubilee River embankment failure.   Since the Jubilee River opening in 2002 there have been repeated embankment, bed and structural failures due to a combination of sub-standard design, construction and/or maintenance.   It should be noted that the Jubilee River has never even conveyed its design capacity.  This image shows existing bank protection downstream of the Taplow Flow Control Structure.  This protection was installed after the 2002/3 flood event.

Bank protection downstream of Taplow Flow Control Structure
Stone bank protection
Taplow bank Jan 2014
Taplow Bank January 2014 – NOTE: planted with trees
Damaged bank at Taplow January 2014
Damaged bank at Taplow – January 2014
September 2023
This is the embankment downstream of the Taplow Flow Control Structure in September 2023.  NOTE:  New houses and no trees!

This bank has failed yet again in December 2024 as shown below.  Note the proximity of the new houses to the channel – and that the trees have been removed.

Embankment failure December 2024
Embankment failure and temporary repair
Close-up of Embankment failure and temporary repair December 2024

Closer examination of the image reveals that the toe of the embankment already had the benefit of previously installed protection that had then failed.

Previous bank protection

You can see how a helicopter was used to place the bags of stone here

For those who don’t know – there have been MANY Jubilee River bank, bed and structural failures since 2003.  I will not spend time here listing the failures but I will just put a few questions (even though I think I know the answers)

Q1: What is total cost to date of Jubilee River bank, bed and structural repairs/improvements since July 2002? (Please supply list identifying the date, the project and the associated costs)

Q2:  What is the maximum conveyance capacity of the Jubilee River today in cumecs?

Q3:  Who pays for all these failures?

Q4:  Who is accountable?

Q5: Will this most recent Jubilee River embankment failure impact the Jubilee River Operating Instructions and the design of similar Flood Alleviation Schemes?

Q6:  Why are the local authorities expected to pay for the wooden footbridge repairs/replacements?  Surely these sub-standard structures were designed and built by the Environment Agency?

Q7:  Somebody needs to explain the purpose of the large diameter and now broken pipe that has been exposed by the embankment failure and is now hanging in space?

Q8:  This embankment was previously planted with hundreds of trees.  Whatever happened to all the trees?

Q9:  If I lived near the failed embankment, would my house insurance be affected?

Q10:  River Thames dredging was abandoned about 30 years ago.  There are no dredgers, operators or disposal facilities.  Should we be reinstating river Thames dredging?

Q11:  What should the Environment Agency fear most?

END

 

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DATCHET

The name "Datchet" is thought to be Celtic in origin, and the last part may be related to cet ("wood"). In the Domesday Book it is called "Daceta".lla. Datchet is first mentioned between 990 and 994, when King Ethelred made small grants of land here.

HORTON

The village name "Horton" is a common one in England. It is Old English in origin and derives from the two words horu 'dirt' and tūn 'settlement, farm, estate', presumably meaning 'farm on muddy soil'.In the Domesday Book of 1086 it was recorded as Hortune.

WRAYSBURY

The village name was traditionally spelt Wyrardisbury; it is Anglo Saxon in origin and means 'Wïgrǣd's fort'. Its name is recorded in the Domesday Book of 1086 as Wirecesberie and as Wiredesbur in 1195. The name is seen again as Wyrardesbury in 1422.

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