A utility tunnel is an underground, usually accessible structural facility for the laying and operation of pipelines and cables in the utility industry. The space enclosed on all sides distinguishes between laying, assembly, reserve and service spaces or service corridors. The line duct consists of line duct sections and shaft structures of different functions, the storage and support structures of the line installations and the operational facilities or equipment.

On this website, you will learn how such technical infrastructure facilities can be provided and used in view of the current challenges for sustainable supply security, energy and resource efficiency, and environmental protection.
At the same time, it provides a platform that further promotes the exchange of information.

The website is aimed at all stakeholders considering the alternative use of sewers, examining their use for strategic planning through to project planning, or commissioned with the operation of supply/sewers.

The parallel underground routing of lines (pipelines and cables) in a specially constructed structural shell with corresponding equipment and fittings is called by different names in German-speaking countries. The following synonymous technical terms are representative of this:

  • Cable corridor
  • Utility tunnel
  • Line tunnel
  • Line culvert
  • Infrastructure duct
  • Pipe or cable duct
  • Media duct
  • Collector duct
  • Collector
  • etc.

Such terms are sometimes also used for installations in buildings, in traffic, mining or water management systems. These are not the subject of this website.

Knowledge Platform

This website is a continuation of the previous activities of the Interessengemeinschaft Begehbare Versorgungskanäle (IBV) (Interest Group Walkable Supply Canals). With funding from the project “Knowledge Transfer for Municipalities and Utility Companies on Underground Walkable Supply Channels as Long-Term Environmentally and Resource-Saving Infrastructure Structures in Urban Areas” by the Deutsche Bundesstiftung Umwelt (German Federal Environmental Foundation), the website was expanded into a communication platform and will be operated in future by the project management organisations entellgenio GmbH and GIBA mbH.


The Interessengemeinschaft Begehbare Versorgungskanäle (IBV) (Interest Group Walkable Supply Canals) is an association of owners, operators, users and service providers who own, manage or use underground walkable utility sewers. With the adoption of an agreement by the members, the IBV was founded on 01 September 2014.

Operation of a 120-year-old supply sewer with multiple trenchless retrofits.