Witten Sewerage
A sewage line was to be constructed in the center of Witten (North Rhine-Westphalia, Germany). The pipes were to be laid under very confined conditions in the center without impacting on the traffic. An AVN800 pushed ahead with two 110- and 140-meter-long pipe sections from a central launch shaft. The problematical and ever-changing geological mixture of sand, loam, silt, clay, argillite and sandstone sills made it necessary for the separation plant to be optimally adapted. Despite the challenging geology, daily best performances of 17 meters were recorded.
