Energy Supply and Technical Installation Railway Tunnel BOB / New Buechiwald Tunnel

The 708m long Buechiwald Tunnel is part of the single track meter-gauge railway between Zweilütschinen and Lütschental.

At the western portal there is a covered technical room for the tunnel’s operation and safety system.

Main Data

  • Transformer station
  • Technical room with sections
  • Ventilation
  • Cable system (power): 1900 m
  • Cable system (Comm. / fibre optic cables): 2000 m
  • Radiating cables: 700 m
  • Handrail: 708 m
  • Overhead conductor rail: 710 m
  • Catenary (chain support): 600 m


Berner Oberland-Bahnen AG


IUB Engineering Ltd.

Construction period


Construction costs

CHF 1,400,000

Scope of services

Design, project planning, tendering, con-struction management and supervision for following parts of the technical installation:

  • Energy supply from 16kV network
  • Energy distribution systems
  • Earthing concept and measures
  • Railway safety and communication cable systems
  • Handrail with cable support system
  • Lighting
  • Equipping technical room with double flooring and ventilation
  • Radio system
  • Catenary system 1500 VDC with overhead conductor rail in the tunnel and chain support on the open line