In Stage 3 of the Sectoral Plan for Deep Geological Repositories, Nagra completed the picture of the subsurface – thanks in part to the Bözberg-2 borehole, the second deep borehole to be drilled in the Jura Ost siting region. It reached a final depth of 829 metres.
Investigations focused on the properties of the underground rock formations – particularly those of the Opalinus Clay in which the deep geological repository will eventually be constructed.
Ideal follow-up to previous boreholes
Data for the Jura Ost siting region are already available from an earlier deep borehole drilled in the community of Riniken. The earlier Riniken borehole as well as the Bözberg 1 and 2 boreholes were drilled around the potential underground disposal zone, which was the best way to achieve a complete overview of the geological conditions of the region.
In the Jura Ost siting region, the geological layers drop towards the south. The Bözberg-2 borehole was located to the north-west of the siting region.
Find out more about the Riniken exploratory borehole in Technical Report NTB 86-02.
Read report
Further deep boreholes
Bözberg-1 borehole
Bözberg-1 was the first deep borehole to be drilled in the Jura Ost siting region as part of Stage 3 of the site selection process.
Bülach borehole
Bülach was the first deep borehole to be drilled in the Nördlich Lägern siting region as part of Stage 3 of the site selection process for a deep geological repository.
Stadel-3 borehole
Stadel-3 was the second deep borehole to be drilled in the Nördlich Lägern siting region as part of Stage 3 of the site selection process.
Stadel-2 borehole
The Stadel-2 borehole was the third deep borehole to be drilled in the Nördlich Lägern siting region as part of Stage 3 of the site selection process.
Bachs-1 borehole
The Bachs borehole was the fourth deep borehole to be drilled in the Nördlich Lägern siting region as part of Stage 3 of the site selection process.
Trüllikon-1 borehole
The Trüllikon borehole was the first deep borehole to be drilled in the Zürich Nordost siting region as part of Stage 3 of the site selection process.
Marthalen borehole
The Marthalen borehole was the second deep borehole to be drilled in the Zürich Nordost siting region as part of Stage 3 of the site selection process.
Rheinau-1 borehole
The Rheinau borehole was the third deep borehole to be drilled in the Zürich Nordost siting region as part of Stage 3 of the site selection process.
Work report
