Indepth were asked to relay a 400mm diameter ductile iron inlet sewer into Hardwick Sewage works as the existing concrete pipe had reached the end of its design life.
There was a chance of slippage into a parallel watercourse due to the old foundations on the existing manholes not being adequate. Indepth were to excavate adjacent to the existing manholes to a depth of 2m and mass fill with concrete to create a solid foundation for the new brick manholes.
Once these were constructed on line the old manholes were removed and a connection pipe was inserted whilst the flows were being over-pumped.
Due to the environmental sensitivity of the watercourse parallel to the works, Indepth had a standby back up 8” pump and a specific team of operatives monitoring the over-pumping at all times.
The project consisted of the following elements: