28.08.2019 14:00

Posiva and YIT agree on second phase of excavation works for final disposal facility

The contract agreement covers the second phase of excavation works in Olkiluoto for two central tunnels and five deposition tunnels connected to them. The total value of the contract is ca. 17 million EUR.

The deposition tunnels to be excavated are unique on a global scale and subject to exceptionally strict quality requirements. The demanding tunnel structures require special professional expertise. Contract works start towards the end of 2019 and are expected to take about two and a half years.

- This one-of-a-kind EKA project we have launched covers not only excavations for the final disaposal facility, but also the encapsulation plant as a whole and the systems which are needed to begin final disposal in the rooms that have already been excavated. Upon the completion of this contract, we will have excavated in ONKALO® the first deposition tunnels approved by the Finnish Radiation and Nuclear Safety Authority STUK for the execution of final disposal, says Posiva’s President Janne Mokka.

- Our cooperation with Posiva has been extremely smooth in previous projects and we are happy to continue our joint efforts in this demanding project. YIT is an experienced executor of complex tunnel projects and this interesting venture gives us the opportunity to utilise our strong expertise, says YIT’s Head of Mining and Special Construction Division, Aleksi Laine.

For more information, please contact:

Posiva Oy, Construction Manager, Juha Riihimäki, tel. +358 2 8381 5300

YIT Oyj, Head of Division, Mining and Special Construction, Aleksi Laine,
tel. +358 40 745 6536

Return to headlines

Share article:
This website stores cookies on your computer. These cookies are used to improve our website and provide more personalised services to you.


To make this site work properly, we sometimes place small data files called cookies on your device. Most big websites do this too.

1. What are cookies?

A cookie is a small text file that a website saves on your computer or mobile device when you visit the site. It enables the website to remember your actions and preferences (such as login, language, font size and other display preferences) over a period of time, so you don’t have to keep re-entering them whenever you come back to the site or browse from one page to another.

2. How do we use cookies?

A number of our pages use cookies to remember your actions and preferences (such as login, language, font size and other display preferences.)

Also, some videos embedded in our pages use a cookie to anonymously gather statistics on how you got there and what videos you visited.

Enabling these cookies is not strictly necessary for the website to work but it will provide you with a better browsing experience. You can delete or block these cookies, but if you do that some features of this site may not work as intended.

The cookie-related information is not used to identify you personally and the pattern data is fully under our control. These cookies are not used for any purpose other than those described here.

3. How to control cookies

You can control and/or delete cookies as you wish – for details, see You can delete all cookies that are already on your computer and you can set most browsers to prevent them from being placed. If you do this, however, you may have to manually adjust some preferences every time you visit a site and some services and functionalities may not work.