Up-to-date information on the deep boreholes

From 2019, Nagra will drill deep boreholes for 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.

Permits granted

To date, the Federal Department of the Environment, Transport, Energy and Communications (DETEC) has granted 16 of the 23 permit applications submitted for deep boreholes. These are: Bözberg 1, Bözberg 2, Bülach, Eglisau, Effingen 1, Marthalen, Remigen 1, Rheinau, Riniken 2, Stadel 1, Stadel 2, Stadel 3, Trüllikon 1, Trüllikon 2 und Trüllikon 3, Zeihen.

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. Factsheets on each drill site can also be found under "More information".

Visit our Nagra blog for more pictures and information.

Visit to the deep boreholes

Nagra offers guided tours for groups of ten or more during the operation of a drill site (details and registration). The observation platform on top of the information centre is open 24/7 and can be visited without prior registration.

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