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, over 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.

Visit to the information centre of the Bachs drill site (Canton of Zürich)

Would you like to experience a guided tour of a drill site? Tours of the Bachs drill site are available by appointment for groups of up to 20 people. Larger groups are welcome but will have to be split up.

Our information centre at the Bachs drill site is open to individual visitors 24 hours a day.

Open days at the Bachs drill site

On the following days, a Nagra employee will be on site to answer your questions and provide information:

Saturday, 2nd October, 10:00 a.m. - 4:00 p.m.
Saturday, 6th November, 10:00 a.m. - 4:00 p.m.
Saturday, 4th December, 10:00 a.m. - 4:00 p.m.

Corona: current rules and restrictions

Protecting you and our employees is very important to us.

From 13th September 2021, registered groups are required to provide a certificate (from 16 years of age) to visit the Bachs drill site. This means that you need a valid Swiss or EU/EFTA Covid certificate (vaccinated, recovered, tested) and an official identity card.

Hand hygiene stations are set up at the information centre. We will provide masks free of charge. We kindly ask you to wear the protective masks during your stay at the information centre.

More information about the Covid certificate:
Website of the Federal Office of Public Health (FOPH)

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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