Herrenknecht micros win in WarsawA pair of Herrenknecht AVND micro machines has completed 16 difficult drives totalling 5.86 km for the new Warsaw wastewater treatment system. Pipe jacking up to 36 m/day at 3 m-diameter and depths of 10-14 m, groundwater pressures of 8 m were experienced in the sand, clay, loam, gravel and boulders that characterize the Vistula river plain. Despite severe weather and tricky operating conditions, the contract was completed successfully and on time. Read the press release and visit www.herrenknecht.com. 15/11.