Bethell Construction

Irk & Douglas UID’s

The River Irk UID project entailed the construction of a new CSO chamber with associated powered screen, along with the associated upsizing of 250 linear metres of existing sewer upstream of the chamber at depths up to 5 metres below existing ground level and the abandonment of existing CSO arrangements once the new facility was operational. The majority of the works were undertaken on a busy length of existing highway in a densely populated area. A temporary road closure was established and maintained to deal with traffic flows throughout the construction period, with information made readily available on site to update the public on the progress of the works and all necessary concessions made to ensure disruption was kept to a minimum outside properties at all times. Close liaison and programming was maintained with UU framework suppliers for the powered screen, panel and kiosk unit to ensure key programme dates were met without issue.

The River Douglas UID project entailed the construction of a new CSO chamber with associated static screen, re-construction of a new overflow sewer to the River Douglas with associated new overflow structure and construction of new access roads and compound area for future maintenance of the installation. The majority of the works were undertaken on land owned by UU, with part of the new overflow sewer to be constructed through an area of ancient woodland.

Rather than construct this section of sewer using traditional opencut techniques, it was decided that to minimise disruption caused to this sensitive area, this section of sewer would be installed utilising ‘no-dig’ sewer techniques. Again, close liaison was maintained with UU framework suppliers to ensure key programme dates were achieved.

For both projects, Bethell developed the outline design for the works to a construction phase design for UU’s approval prior to works commencing on site.