/// Non-Infrastructure

Datchet WTW

Client: Black & Veatch
Value: £235k
Project start: April 2012
Project finish: November 2012
Location: Datchet Thames Water Treatment Works, Eton Road, Datchet, Berkshire

Construct a new sewage pumping station (PS) that will receive all foul water from the drainage system.

Undertakings:

J Browne Construction were awarded the contract to undertake the installation of a new waste package pumping station and installation of a raising main back to the sewer outfall manhole some 570 metres away in Eton Road, Datchet on behalf of Client Black and Veatch whom are working on behalf of Thames Water Utilities.

The main project delivery was to remove the existing 30000L cesspit which had become costly to empty with tanks sometimes visiting site up to three times a week to tanker away and reduce the levels being produced over the site.

The new pumping tank was installed over the footprint of the old cesspit which we removed and excavated to a depth of 5.5 metres. Due to the depth of the excavation and the high ground water table 6nr de-watering drilled wells were placed surrounding the proposed work area to a depth of 12m to allow for the works to be safely executed with the a cofferdam, and discharged flows measured through two V-Notch tanks of 150lps.

Datchet WTW

Datchet WTW

On completion of the tank installation and separate connecting valve chamber with associated pipe work connections the area surrounding was fully fenced to separate the clean water distribution part of the site to the waste water, and hard and soft landscaping undertaken to create vehicle access for future maintenance of the area by Thames Water.

The project commenced in May 2012 with the commissioning of the new station in mid-August 2012.

In addition to the package pumping station J Browne assisted the client in looking for a cost efficient way to undertake the repairs to the existing foul sewer network within the Water Treatment Works. Which after review of the survey findings and cost assessment, we carried out the cleaning, re-rounding and lining of all the existing foul sewer within the works using a heat cured resin and Brawo Liner.

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