Traffic project German Unity No. 13 A38 Breitenworbis-Bleicherode segment Construction of the Höllberg tunnel
Drainage via open dewatering during tunnelling operations.
Multiple submersible pumps from the KTV and KTZ series were used. The special characteristics of Tsurumi pumps, such as an inside mechanical seal, shaft sleeve with oil ring and an oil lifter allow them to be used in 24-hour suction operation.