Current information on the deep boreholes

From 2019, Nagra has been drilling deep boreholes for the detailed investigation of the geological underground in the potential repository siting regions Jura Ost, Nördlich Lägern and Zürich Nordost.

The insight gained from the deep (or exploratory) borehole investigations is used to extend Nagra's knowledge of the underground geological environment. This understanding is essential for ensuring the safety of a repository and allows a reliable comparison of the siting regions and the selection of the most suitable site. The geoscientific investigations in the deep boreholes will focus on the properties of the underground rock formations – particularly those of the Opalinus Clay in which the deep geological repository will eventually be constructed.

So far, around 2000 people have visited the drill sites to take a look over Nagra's shoulder. You are welcome too: at all operational drill sites, the observation platform on top of the information centre is open 24/7.

Guided tours at the drill sites are now possible again

We are pleased to be able to offer guided tours of the drill sites again for up to 12 visitors. If you would like to sign up a larger group, we will try to prepare an individual program with you.

Your protection and that of our employees are very important to us. We comply with official hygiene measures and are responsible for their implementation. Hand hygiene stations have been set up at the information pavilion. We provide masks free of charge and will hand these out to you on site. We kindly ask you to wear the protective masks during your stay.

We thank you for your understanding and look forward to your visit.

Permits granted by DETEC

Of the 23 submitted permit applications for deep boreholes, Nagra withdrew those for Weiach-3 and Glattfelden. The Federal Department of the Environment, Transport, Energy and Communications (DETEC) has granted the other 21 applications. These are: Bözberg-1, Bözberg-2Bülach, Dachsen, Eglisau, Effingen-1, Effingen-2, Laufen, Marthalen, Remigen-1, Remigen-2, Rheinau, Riniken-2, Stadel-1, Stadel-2, Stadel-3, Trüllikon-1, Trüllikon-2, Trüllikon-3, Uhwiesen and Zeihen.

Two permit applications withdrawn: Weiach-3 and Glattfelden

Nördlich Lägern siting region: In February 2020, Nagra announced that it would withdraw the permit applications for Weiach and Glattfelden. In the northern part of the siting region, Nagra confirmed the existence of fault zones deep underground (media release). The southern part of the siting region, however, is suitable in principle for constructing a repository and will undergo further investigation.

More information on the deep boreholes?

Our special brochure provides a good overview of the purpose of the deep borehole investigations and the procedures involved. You can also find our factsheets on the individual drill sites in the blue text-box "More information" on the right-hand side.

Visit our Nagra blog for more pictures and information.

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