Replacement of Water- and Power-Systems Zelgstrasse / Waldmannstrasse

The water network, the MV and LV networks and the network connections for water and power were replaced in the roads Zelgstrasse and Waldmannstrasse in Bern-Bethlehem. The drinking water mains with a length of 610m and 34 house water connections were replaced. The drinking water mains were laid using the open trench method in the streets in addition to trenchless construction on some of the heavily frequented side streets

  • Burst lining for PE 160/130.8: 3x70 m
  • Flush drilling for PE 180/147.2: 170 m

The project included the construction of 2 new distribution boxes as well as replacement of cable conduits with a total length of approx. 440 m. A total of 36 electricity house connections were replaced – partly using blow propulsion partly in cut-and-cover construction.

In addition, cable diagrams were prepared and the new house connection boxes and new locations of the distribution boxes were clarified with the property owners and the Civil Engineering Authority of Bern Municipality.

Main Data

  • Number of new distribution boxes: 2
  • Number of new cable shafts: 2
  • Total length of replaced cable conduits: 440 m
    • of which 4 x PE 132/120: 210 m
    • of which 6 x PE 132/120: 230 m
  • Number of replaced electricity house connections: 36
  • Number of replaced hydrants: 6
  • Length of replaced drinking water pipes PE 160/130.8: 300 m
  • Length of replaced drinking water pipes PE 180/147.2: 270 m
  • Length of replaced drinking water pipes, ductile sockets DN 250: 400 m
  • Number of replaced house connections for water: 34


ewb, Energie Wasser Bern


IUB Engineering Ltd

Construction period


Construction costs

Civil works: CHF 600'000

Scope of services

  • Construction project
  • Tendering and evaluation of bids
  • Project execution incl. electrical cabling design
  • Construction supervision