West Berkshire Council

The South East Thatcham Flood Alleviation Scheme Blog

The South East Thatcham Flood Alleviation Scheme is a project to build several surface water retaining earth embankments at Dunstan Green Park, public open space near Kennet School, and carry re-profiling of the Harts Hill Road and Francis Baily Primary School and Kennet School playing field.  The scheme aims to reduce surface water flood risk to 62 properties at the south east of Thatcham.

We'll upload news and weekly updates here as the scheme progresses.

For any questions, comments or further information, get in touch with the Highways Projects Team.

2016 - Flooding in Station Road, Thatcham

South East Thatcham FAS - Week 18

Written on: 5-8-2019

Floral Way

Following the completion of the in-situ concrete culvert, the contractor has casted the concrete cover for the outfall chamber.

The contractor has completed driving all the sheets piles to the required depths.

This week the contractor has started constructing the raised reservoir embankment.

Concrete aprons has been cast for the recently installed headwalls.

wk18 Floral Way - Concrete culvert
wk18 Floral Way - Concrete culvert

wk18 Floral Way - Casting chamber cover
wk18 Floral Way - Casting chamber cover

In-situ concrete culvert

Concrete chamber cover

wk18 Floral Way - Bund Earthwork
wk18 Floral Way - Bund Earthwork
wk18 Floral Way - Bund Earthwork
wk18 Floral Way - Bund Earthwork

Earthworks for the bund

 
wk18 Floral Way -  Concrete Apron I
wk18 Floral Way - Concrete Apron I
wk18 Floral Way -  Concrete Apron II
wk18 Floral Way - Concrete Apron II

Concrete apron for the headwalls

 

 

Dunston Green Park

This week the contractor has completed installing the headwalls and concrete pipes in the ditch on the east side of the park. A filter drain has been installed at the northern end of the park.

wk18 Dunstan Green - Headwall and drainage pipes
wk18 Dunstan Green - Headwall and drainage pipes
wk18 Dunstan Green - Headwall and drainage pipes
wk18 Dunstan Green - Headwall and drainage pipes

Headwall and drainage pipes

 
wk18 Dunstan Green - Filter Drain
wk18 Dunstan Green - Filter Drain
 

Filter drainage system

 

 

Siege Cross

This week the contractor has begun the earthworks to build the bund structure.

 wk18 Siege Cross - Bund earthwork
wk18 Siege Cross - Bund earthwork

wk18 Siege Cross - Bund earthwork
wk18 Siege Cross - Bund earthwork

Earthworks for the bund

 

 

 


South East Thatcham FAS - Week 17

Written on: 5-8-2019

Floral Way

The contractor has carried on installing the sheet piling that forms part of the raised reservoir embankment. The earth moving operations to construct the embankment will be starting next week.

At the outfall location of the bund, a stainless steel culvert has been proposed which joins the recently formed concrete chamber. A concrete culvert will link the stainless steel pipes and the concrete chamber.

This week the stainless steel pipes have been delivered and positioned in place. The reinforcing bars for the in-situ concrete culvert were fixed in place and the concrete base was formed.

The contractor has installed two inlet headwalls and associated drainage pipes.

wk17 Floral Way - Sheet pile installation
wk17 Floral Way - Sheet pile installation

wk17 Floral Way - Culvert base
wk17 Floral Way - Culvert base

Sheet piling

Casting of concrete base for the culvert

wk17 Floral Way -  Concrete headwall I
wk17 Floral Way - Concrete headwall I
wk17 Floral Way -  Concrete headwall II
wk17 Floral Way - Concrete headwall II
 

Completed headwalls

 

 

Dunston Green Park

The contractor started installing headwalls and drainage pipes at the north end of the existing ditch.

wk17 Dunstan Green - Headwall installation
wk17 Dunstan Green - Headwall installation

Headwall installation

 

Siege Cross

The contractor has installed a new drainage chamber which connects to the existing drainage network.

The contractor is preparing to start work with the Kennet School playing fields. Construction vehicles will access the playing fields from Agricola Way.

A temporary footpath has been constructed which provides an alternative route for pedestrians while a short section of the existing footpath is closed.

 wk17 Siege Cross - Drainage chamber
wk17 Siege Cross - Drainage chamber

wk17 Siege Cross - Drainage chamber complete
wk17 Siege Cross - Drainage chamber complete

New drainage chamber

 
wk17 Siege Cross - Temp footpath
wk17 Siege Cross - Temp footpath
wk17 Siege Cross - Temp footpath complete
wk17 Siege Cross - Temp footpath complete

Temporary footpath complete

 

 

 


South East Thatcham FAS - Week 16

Written on: 2-8-2019

Floral Way

The core clay base for the reservoir embankment is now completed and the contractor has continued with the sheet piles installation.

Concrete was poured for the casting of in-situ chambers walls and cover slab. The cover slab for 2.4 x 2.4m square chamber will be completed at a later stage due to other works required within the chamber.

wk16 Floral Way - Sheet pile installation
wk16 Floral Way - Sheet pile installation

 

Sheet pile installation

 

wk16 Floral Way - Concrete chamber
wk16 Floral Way - Concrete chamber
wk16 Floral Way - Concrete chamber
wk16 Floral Way - Concrete chamber

In-situ concrete chambers construction

.

 

Dunston Green Park

Following the realignment of the land drainage ditch last week, the contractor began works to infill the diverted section of the existing ditch.

The contractor has progressed works toward the northern part of the park, installing headwalls and concrete pipes where the proposed bunds intersect the existing ditch.

wk16 Dunstan Green - Ditch realignment
wk16 Dunstan Green - Ditch realignment
wk16 Dunstan Green - Site preparation
wk16 Dunstan Green - Site preparation
Realignment of existing ditch

Site preparation

 

Siege Cross

This week the contractor has been installing drainage pipes in the north end of the park.

 wk16 Siege Cross - Drainage pipes installation
wk16 Siege Cross - Drainage pipes installation

Excavation for drainage pipes installation

 

 

 


South East Thatcham FAS - Week 15

Written on: 2-8-2019

Floral Way

Following the casting of base slabs for the two concrete drainage chambers last week, the contractor has fixed the reinforcing bars for the side walls and cover slabs. Work has continued on the construction of the base to the reservoir embankment.

This week the contractor started the sheet piling works, designed to provide prevent groundwater undermining the raised reservoir embankment.

wk15 Floral Way - chamber reinforcements
wk15 Floral Way - chamber reinforcements

wk15 Floral Way - chamber reinforcements
wk15 Floral Way - chamber reinforcements

Fixing reinforcement bars for the drainage chambers.

 

wk15 Floral Way - Building of the bund base
wk15 Floral Way - Building of the bund base
wk15 Floral Way - Sheet Piling
wk15 Floral Way - Sheet Piling

Reservoir embankment base.

Sheet piling work.

 

Dunston Green Park

The contractor continued working around the new ditch area, finishing the ditch profile and installing headwall grilles to the upstream headwalls.

wk15 Dunstan Green - New ditch profile
wk15 Dunstan Green - New ditch profile
wk15 Dunstan Green - Headwall Grille
wk15 Dunstan Green - Headwall Grille
Finalising the ditch profileHeadwall grilles

 

Siege Cross

This week the newly installed drainage pipes were air tested to ensure that the joints are watertight.

 wk15 Siege Cross - Drainage pipe air test
wk15 Siege Cross - Drainage pipe air test

Drainage pipe air test for water-tightness

 

 

 


South East Thatcham FAS - Week 14

Written on: 22-7-2019

Floral Way

This week the contractor finished casting the base slabs for the two in-situ reinforced concrete chambers off Floral Way.

w14 Floral Way - Casting the base slab
w14 Floral Way - Casting the base slab

w14 Floral Way - Casting the base slab
w14 Floral Way - Casting the base slab

Casting the base slabs

 

w14 Floral Way - Completed base slab
w14 Floral Way - Completed base slab
w14 Floral Way - Completed base slab
w14 Floral Way - Completed base slab

Completed base slabs

 

 

Dunston Green Park

The contractor installed a land drain system which includes a twin-piped swale.

Following on from the concrete headwall which was recently laid, the contractor has installed a pipe bend to connect to the next downstream headwall.

w14 Dunstan Green - Drainage pipes installation
w14 Dunstan Green - Drainage pipes installation

w14 Dunstan Green - Ditch excavation
w14 Dunstan Green - Ditch excavation
Concrete drainage pipes installationDitch excavation
w14 Dunstan Green - Headwall installation
w14 Dunstan Green - Headwall installation
 
Headwall installation 

 

Siege Cross

The contractor has continued installing the drainage pipe that connects to the northern part of the park. Trial holes were excavated in the footway beforehand in order to locate the existing underground services.

As the works have progressed toward the north end of the park a small section of the play area has been fenced off and the play equipment temporarily removed to enable the pipes to be laid.

w14 Siege Cross - Drainage pipes installation
w14 Siege Cross - Drainage pipes installation
 w14 Siege Cross - Drainage pipes installation
w14 Siege Cross - Drainage pipes installation

 
Concrete drainage pipes installation

 

w14 Siege Cross - Drainage works near the play area
w14 Siege Cross - Drainage works near the play area
 
Drainage works near the play area