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Hydrogeological investigations at the Mont Terri Rock Laboratory The Mont Terri project was called to life in 1995 by a small group of organisations. Their common interest concerns argillaceous formations as potential host rocks for repositories for radioactive waste. The hub of the international research project is the Mont Terri rock laboratory in the Mont Terri motorway tunnel in northwestern Switzerland. Its testing ground is the Opalinus Clay, a Mesozoic shale formation. The project is steered and financed by the project partners, in part with financial support from the European Community. It is structured as a series of individual experiments in the fields of geology, hydrogeology, geochemistry and rock mechanics. The experimental objectives cover, on the one hand, the general testing of tools and methods for the investigations in clay-rich formations and, on the other hand, the characterisation specifically of the Opalinus Clay formation. To date, Colenco has been involved in two components of the project. Firstly, we participated in the hydraulic testing programmes. With in-situ hydraulic and gas tests having been conducted in many of the more than 70 boreholes drilled in various orientations from the laboratory galleries, we applied our own borehole simulator Multisim for the detailed quantitative analysis of some of these tests. Currently, Colenco is finalising the synthesis of all hydrogeological investigations carried out in the initial 5 years of the project. Given the tremendous number of technical reports describing the different experiments, our initial task was an assessment of the suitability of the available information as possible input for the final product, an integrated conceptual hydrogeological model of the Mont Terri laboratory site. The model includes relevant hydrogeological features, processes and intrinsic properties which govern fluid and gas flow in the undisturbed Opalinus Clay formation, as well as hydraulic boundary and state conditions. Jean Croisé - Groundwater Protection and Waste Disposal Renewal of the HPP Küblis  In connection with renewing the concession, the Client, Rätia Energie AG, intends a complete rehabilitation of the The bid documents for turbines, generators and transformers have been established by Colenco in advance and distributed to potential clients. The bid deadline for documents is 30.06.2002. Martin Hüsler - Hydropower Plants |