Installation of the replacement pipeline will likely take place from October to December 2021, and October and November 2022.

Notices informing users of the common about the works will be in place prior to works starting.

The map above provides information on installation within the common. As outlined in the planning process, the project will be narrow working through the common. Further information on our construction plans can be found below.

About installation

Before installation starts, the first thing you will see is signs notifying common users that works will be taking place.

When installation starts, Heras-type fencing bolted together, or strong-wall fencing, will be used to secure the working area.

You may also see mobile welfare units, equipment, materials and vehicles within the working area.

During the open cut installation process, you may see deliveries of the steel pipes. These will be brought to site in a ‘just-in-time’ delivery sequencing – this is because we want to reduce the space needed for the compound within the common. We will also have 24-hour security of the working areas within the common.

Access to Chobham Common will be available throughout installation. If there are any areas of closure, including footpath diversions, we will notify the community in advance.

The car parks serving Chobham Common will remain open throughout installation.

We will be using an open cut technique to install through most of the Common. This work will likely take place in October and November 2022.

Chobham Common is a Special Protection Area (SPA), featuring birds protected under European regulations that cannot be disturbed during nesting periods. This means we can only work in the area through the winter months, so we have adapted our timeline to work around the nesting season.

Due to this seasonal restraint, installation work can only take place between October and February. In order to ensure we can construct within the seasonal constraints; we will be undertaking trenchless works from October 2021 to February 2022. We will then return to install the open-cut sections from October 2022 to February 2023.

Fencing material will be selected to reduce the visual impact on the Common, maintaining low visibility of the working area.

We will be using a Horizontal Directional Drill (HDD) trenchless technique to install in specific areas within Chobham Common.

Chobham Common is a Special Protection Area (SPA), featuring birds protected under European regulations that cannot be disturbed during nesting periods. This means we can only work in the area through the winter months, so we have adapted our timeline to work around the nesting season.

Due to this seasonal restraint, installation work can only take place between October and February. In order to ensure we can construct within the seasonal constraints; we will be undertaking trenchless works from October 2021 to February 2022. We will then return to install the open-cut sections from October 2022 to February 2023.

The work areas will be fully secure with locked gates and 24-hour security.

Vegetation

Where the topsoil has been stripped and stored, this will then be replaced after the works and left to naturally regenerate as agreed with Surrey Wildlife Trust and Natural England.

The vegetation reinstatement will be subject to a five-year aftercare.