An outline of the Roundmoor Ditch project. Click on image for a larger view.

Roundmoor Ditch is a chalk-fed stream that rises  in Taplow and flows southeast to Dorney Common. There, it is joined by the Cress Brook and continues as the Boveney Ditch, until it joins with the River Thames.

In 2014, the Thames Basin suffered significant flooding which included extremely high groundwater levels in many areas, including Slough. This resulted in surface water infiltrating the sewer systems and therefore overwhelming the sewage treatment works.

Under these extreme conditions, the Thames Water sewage treatment works in Slough were permitted to discharge storm flows into the Roundmoor Ditch. This continued for an unprecedented period of around three months.

Significant concerns raised by residents in Eton Wick, community groups, and landowners highlighted that the river, its ecology, and its use as an amenity is highly valued by members of the community. Thames21, in conjunction with Thames Water, has embarked on a two-year project to restore Roundmoor Ditch to a significantly better state than before the 2014 pollution incident and to address community concerns.

The project

In partnership with the local community, Thames21, will improve and protect 750 metres or more of the Roundmoor Ditch as it flows through Dorney Common, Eton Wick.

London’s leading waterways charity will work with stakeholders to achieve this. Stakeholders include Thames Valley Angling Association, Landowners; Palmers Estates, Eton College and Eton Wick Waterways Group; local residents associations and environmental groups, and the local council – the Royal Borough of Windsor and Maidenhead.

Residents will be able to gain a national certificate, through Thames21’s accredited training course, to lead waterway clean ups. The charity will also aim to set up a ‘Friends of’ group in order for the community to maintain the area in the long term.

Thirty community events will be delivered through the project, aiming to engage 400 people or more in practical volunteering activities. These include habitat management, river restoration and river monitoring, such as a native wildflower seeding/planting programme on the riverbanks next to residential properties and managing seasonal use of temporary fencing. Check out our events page for updates on upcoming sessions. These events have been developed in consultation with ideas for the community.

Roundmoor Ditch Consultation Comments 2017                            Click the thumbnail to view the map of the comments.



The project’s educational programme will collaborate with the Thames Water Education Centre at Slough Sewage Treatment Works (STW). The project as a whole will help to improve the local communities’ understanding of Roundmoor Ditch’s relationship with the Slough Treatment Works and local flood risk.

View the vision statement for the Roundmoor

Community consultation will be carried out on July 13 and 17, at Eton Wick CoE First School, Sheepcote Road, Eton Wick, Windsor SL4 6JB.

For more information on the project and upcoming events, please contact Luke Damerum on 07824 491166 or via email.


Community Update Roundmoor Ditch Restoration Project 10-01-18

Roundmoor Ditch Project Programme 2018 

Roundmoor Ditch, Dorney Common Site Plan North

Roundmoor Ditch, Dorney Common Site Plan South

Roundmoor Ditch Project Site Plan Enhancements Method Statement