Jura-Südfuss (Cantons Solothurn, Aargau) is one of the six potential siting regions for a geological repository confirmed by the Federal Council. The region extends to the west of Olten on both sides of the cantonal boundary between Solothurn und Aargau.
The geological siting area covers an area of around 65 square kilometres. The host rock formations that come into question in the area are the Opalinus Clay (with its confining units) in the west and the Effingen Beds in the east.
Understanding of the spatial conditions in the area is based on 2D seismic investigations and partly on the results from the deep borehole at Schafisheim. The siting area lies close to the Folded Jura at the northern boundary of the Molasse Basin and is therefore partly subject to strong tectonic stress, which is expressed visibly in some of the regional structures. There are also indications of deformation outside these regional elements and large-scale quiet bedding is rare.
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 host rocks Opalinus Clay and Effingen Beds could be constructed in the area shown in green.
Canton Solothurn: Däniken, Dulliken, Eppenberg-Wöschnau, Erlinsbach, Gretzenbach, Lostorf, Niedergösgen, Obergösgen, Olten, Schönenwerd, Starrkirch-Wil, Stüsslingen, Trimbach, Winznau
Canton Aargau: Aarau, Buchs, Gränichen, Hirschthal, Holziken, Kölliken, Muhen, Oberentfelden, Suhr, Unterentfelden
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 Solothurn: Hägendorf, Kappel, Rickenbach, Walterswil, Wangen bei Olten
The area lies in the community of Däniken in the vicinity of an existing gravel-pit with a gravel plant. It borders on a parcel of land with a residential building. Rail access would require construction measures. With the existing industrial buildings and forested areas, the facility would barely be visible from larger residential zones.
The area lies in the community of Suhr adjacent to a distribution centre with a car-park. The area is used largely for agricultural purposes today and is well accessed. It borders on the Wyna river and local recreational facilities (e.g. swimming pool). The facility would, in principle, be visible from Suhr, but could be integrated into an existing industrial zone with large buildings.
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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-Südfuss 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).|
|Aarau. Together with the ENSI and Nagra, the SFOE provides information on the proposals for geological siting regions.|
|Niedergösgen. 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). |
| 1982 – 1984||Regional seismic investigations in the area Olten - Schaffhausen.|