Enersense builds a new 110 kV underground cable line to strengthen Tartu’s electricity network

This project marks the next stage in Elering’s long-term program “Urban Underground Powerlines”, which aims to replace overhead lines in cities with underground cables to make the urban landscape more attractive and improve the reliability of electricity supply.

As part of the project, Enersense will build a new underground cable line to replace approximately 6.5 kilometres of existing 110 kV overhead lines and dismantle the old structures upon completion.

As a result, around 32 hectares of land will be freed from existing construction restrictions, and Tartu will benefit from a more modern, reliable and visually cleaner electricity network.

“We thank our client for their trust. It is an honour for us to take part in building a reliable and future-proof power grid in Estonia,” says Ott Sillukse, Head of High Voltage at Enersense in Estonia.

The work is scheduled for completion in the second half of 2027. The new underground cable will mostly follow the existing overhead line corridor, though in some sections a new route has been chosen to ensure an optimal and safe layout. Most of the cable will be installed using directional drilling technology, which allows the work to be carried out underground without extensive excavation.

“Our team works every day to make Estonia’s electrical infrastructure smarter, safer, and more sustainable. This project is an excellent example of cooperation that creates value for both the community and the entire energy system,” says Enersense’s Senior Project Manager Agur Kollom.

The value of the project is approximately EUR 5 million, and it will be recorded in Enersense’s Power business unit’s order backlog for the fourth quarter.