Jura Ost (Canton Aargau) is one of the six potential siting regions for a geological repository confirmed by the Federal Council. The region in the precursory folding zone of the Aargau Jura mountains is suitable for both a high-level waste repository and a low- and intermediate-level waste repository.
The geological siting area covers an area of around 60 square kilometres. The preferred host rock is the Opalinus Clay (with its confining units).
Understanding of the spatial conditions in the area is based on 2D seismic investigations and results from a deep borehole (Riniken). The siting area is located in a region that has partly been tectonically overprinted by the folding of the Jura mountains (precursory folding zone). For this reason, the host rock has areas with largely quiet bedding as well as zones with tectonic elements; these occur mainly in the marginal zones of the siting area.
In general, the host rock shows quiet bedding, with a slight dip to the south, and offers a certain degree of flexibility in terms of the layout of the disposal caverns and tunnels.
Overall, the siting area is evaluated as being suitable.
The underground installations for a deep geological repository for low- and intermediate-level waste in the Opalinus Clay could be constructed in the area shown in green.
Canton Aargau: Bözen, Effingen, Elfingen, Gallenkirch, Gansingen, Herznach, Hornussen, Ittenthal, Linn, Mönthal, Oberbözberg, Remigen, Riniken, Sulz, Ueken, Umiken, Unterbözberg, Villigen, Villnachern, Zeihen
Planning perimeter for surface facilities
The required surface infrastructure (e.g. the portal of the access tunnel) could also be located outside this siting region. Working together with the affected Cantons and representatives from Germany, the Federal Government has defined planning zones (so-called planning perimeters) that include these additional areas. The planning perimeter extends up to 5 km around the geological siting region and should have good road or rail access. Mountainous and hilly zones and protected natural areas are restricting factors. The Federal Office of Energy announced the planning perimeters in provisional form on 10th December 2009; these were approved by the Federal Council on 30th November 2011.
Additional communities within the planning perimeter (besides the siting communities):
Canton Aargau: Birmenstorf, Birr, Böttstein, Brugg, Döttingen, Etzgen, Frick, Gebenstorf, Gipf-Oberfrick, Habsburg, Hausen, Holderbank, Kaisten, Laufenburg, Lupfig, Mettau, Mülligen, Oberhofen, Oeschgen, Rüfenach, Scherz, Schinznach-Bad, Schinznach-Dorf, Turgi, Untersiggenthal, Veltheim, Windisch, Wittnau, Würenlingen
The area lies in the community of Hornussen in an agricultural zone to the south of the A3 motorway. It is adjacent to an industrial zone located in the community of Frick. Construction measures would be required to provide rail access to the area. The facility would not be visible from larger residential areas, but would be from a few individual buildings to the north of the motorway.
The area lies in the community of Bözen and partly in Effingen in an agricultural zone along the A3 motorway. Accessing the area would require construction measures. The facility would be partly visible from residential areas. In particular, the surface facility for a HLW or combined repository would have to be partially embedded in the sloping terrain.
The area lies in the community of Villigen and partly in Böttstein, in the immediate vicinity of ZWILAG and the Federal Government interim storage facility. A large part of the area was used previously for gravel quarrying and, since re-cultivation, has been used for agriculture. The cantonal road would have to be relocated. The facility would be only poorly visible from residential zones.
The area lies in the community of Würenlingen, adjacent to ZWILAG and the Federal Government interim storage facility. It is mainly in a wooded area, meaning that clearing and replacement planting would be necessary. Accessing the area is straightforward. The facility would not be visible from residential zones.
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|At a media conference held by the Swiss Federal Office of Energy (SFOE), Nagra announces its proposals for potential siting areas for the surface facility. These will serve as the basis for discussions within the framework of regional participation.|
|The Federal Council decides to include the siting region Jura Ost in the further Sectoral Plan process. Stage 1 of the process is completed and Stage 2 initiated.|
|Start of the public consultation phase on Stage 1
of the site selection process for deep geological repositories. |
|The Swiss Federal Nuclear Safety Inspectorate (ENSI) approves Nagra's proposed siting regions following a review of safety and engineering feasibility aspects.|
|Announcement of the provisional planning perimeter by the Swiss Federal Office of Energy (SFOE).|
|Oberbözberg. Together with the ENSI and Nagra, the SFOE provides information on the proposals for geological siting regions.|
|Announcement by the SFOE of the proposed siting regions for deep geological repositories. |
|The Federal Council approves the conceptual part of the sectoral plan for deep geological repositories. |
|1993||Completion of the site investigations for low- and intermediate-level waste, comparative assessment of the results for the four sites, proposal of the Wellenberg site.|
|1991 – 1992||Regional seismic investigations between the river Aare and Lake Constance (2D seismics).|
|1988||Recognition by the Federal Council of the feasibility and safety of disposing of low- and intermediate-level waste in Switzerland. |
|1985||Submission of Project Gewähr to the federal authorities (demonstration of the feasibility and safety of disposing of all types of radioactive waste in Switzerland). |
|1983 – 1984||Riniken (AG) borehole.|
| 1982 – 1984||Regional seismic investigations in the area Olten - Schaffhausen.|