ENVIRONMENTAL engineering company MGS-Demco has used directional drilling to install 160mm diameter sewer pipes beneath a heavily congested road in Neasden, north west London.
The Coventry-based firm, working for main contractor Willmott Dixon, was employed by Steve Hill Construction to join a new sewer to the Thames Water main sewer 4m below ground.
The new sewer, for Fortunegate Community Housing's Neasden Open Space development, had to connect exactly with a manhole chamber in a footway on the other side of the road.
Demco used its FD horizontal drilling system to achieve a grade of 6mm per 1m length of pipe within a vertical and lateral tolerance of 60mm over the 20m route.
Work was carried out within two working days with no disruption to traffic and minimum noise.