Client: Sanctus

We installed a new 6.5m deep manhole onto an existing combined sewer in the centre of a cross roads in a highly built up area in Bristol. The work was carried out from road level by using a 21t excavator with 3m extended clamshell grab. Before excavation commenced, we fitted a vacuum attachment to a 21T machine to enable us to uncover known, and unknown buried services within the working area safely. The work involved over pumping the live combined sewer to enable us to form a new manhole with a backdrop connection ready to pick up the adjacent attenuation tank. Once the manhole was installed we had to carry out alterations to an existing attenuation tank, involving increasing the size by double & connecting into the newly formed manhole.