Cm-P00090632

CERN LIBRARIES, GENEVA CERN/FC/2586 Original: French 13 December 1982 CM-P00088002 ORGANISATION EUROPÉENNE POUR LA RECHERCHE NUCLÉAIRE CERN EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH FINANCE COMMITTEE Hundred-and-ninetieth Meeting Geneva - 14 December 1982 THE ROADWORKS NECESSITATED BY THE LEP PROJECT The Finance Committee is invited to take note of the roadworks necessitated by the LEP Project for which CERN is to pay. 82/134/5/e 1 CERN/FC/2586 THE ROADWORKS NECESSITATED BY THE LEP PROJECT INTRODUCTION 1 Access to the LEP tunnel is provided via shafts bored at eight substantially equidistant points, seven of them on French and one on Swiss territory, distributed around a perimeter of about 27 km. 2 The considerable geographic scatter of the LEP access points means that roadworks will be needed in order to: - connect these eight points to the public road system; - provide facilities for heavy traffic without any danger and with the minimum of interference with the environment during the civil engineering work and the fitting out of the machine; - finally, provide links between the Meyrin and Prévessin laboratories and the eight access points for heavy loads during LEP operation. 3 This extensive programme may be sub-divided into: - the building of CERN roads; - the building and alteration of local roads; - the building and alteration of departmental highways; - the building of trunk roads. The first category concerns the building of private roads, and forms part of the ordinary programme of work for the LEP Project (as it did for the same type of road during the building of the SPS). It is therefore the responsibility of the Organization. The other three categories concern alterations to the public system. The size of LEP means that the programme is very extensive, with the costs being borne by the French state and by the Department of the Ain for the ancillary services needed for the project to which it is host. 82/134/5/e 2 CERN/FC/2586 THE CERN ROADS 4 The LEP tunnel access points are generally some distance from any public roads. This applies to points: - PA2, in the commune of Sergy; - PA4, in the commune of Echenevex; - PA6, in the commune of Versonnex; - PA8, in the commune of Ferney-Voltaire. The other access points lie beside public roads (PA5 and PA7) or are served by roads previously built (PA1 and PA3). 5 As was the case for the SPS, CERN will have to provide links between the four above-mentioned points and the public road system. The total length of these links, the lines of which have been decided in close co-operation with the appropriate authorities and the communes concerned, is more than 3 km and includes two civil engineering structures (PA2 and PA4). The cost of these works is estimated at about 15 million French francs (at January, 1982 prices). 6 The French authorities have opened a public enquiry (procedure for obtaining a "Déclaration d'Utilité publique"). The Works Directorate of the Department of the Ain, acting as the main contractor for CERN, the principal, is to be appointed to perform the work. THE LOCAL ROADS 7 The local road system will have to be altered to suit the requirements of LEP: - to reinforce the existing roads (communes of Prévessin and Cessy); - or to widen and reinforce existing roads (commune of Crozet); - or to build new roads (communes of Crozet, Ornex and St. Genis-Pouilly). 8 The whole of the work concerns more than 7 km of roadway and the entire cost will be borne by the French state. CERN, however, is undertaking to repair the damage which may be done to these roads by site traffic during the civil engineering and installation work on LEP. The French state will be opening a public enquiry at the beginning of next year. 82/134/5/e 3 CERN/FC/2586 THE DEPARTMENTAL HIGHWAYS 9 Alterations will also have to be made to the departmental highway system for work on LEP and subsequently for its operation. They include: - the reinforcement of roads; - the widening and reinforcement of roads; - the building of new roads. 10 These very extensive works concern about 30 km of roadway. The financial burden is to be shared between the French state and the Department of the Ain, which will receive a contribution from the Rhône-Alpes region. The Department will be opening a public enquiry at the beginning of next year. 11 Following the precedent established when the SPS was built and it assumed responsibility for providing the link between the Meyrin and Prévessin laboratories, CERN has agreed, in connection with the building of LEP, to shoulder the cost of a section about 2000 m long of the Prévessin-Moëns deviation between Mategnin and the Prévessin laboratory forming part of this programme of alterations and representing a very small proportion of the total number of alterations to the public road system. CERN agreed to do this because two thirds of the line of this deviation lie on land made available to CERN by the French state; the new road will end in front of the entrance to the Prévessin laboratory at a crossroads to be built by CERN; one third of the line passes over an existing CERN track leading to SPS access point No. 4; and, while providing links to the LEP access points, this new roadway will greatly improve communications between the Meyrin and Prévessin laboratories and points No. 4 and 5 of the SPS where the proton-antiproton experiments are installed. 12 The cost of building this deviation is estimated at 6 million French francs (at January, 1982 prices). In due course, an appropriate agreement will have to be made between the Department of the Ain, the principal of this programme, and CERN. THE TRUNK ROADS 13 A long section of the Ferney-Voltaire deviation, supplementing that of Prévessin-Moëns, is to be built to provide access for heavy loads to LEP's points 5, 6, 7 and 8, at the expense of the French state alone, which will be opening an appropriate public enquiry at the beginning of next year. 82/134/5/e 4 CERN/FC/2586 CONCLUSION 14 The Finance Committee is invited to take note of the roadworks necessitated by the LEP Project for which CERN is to pay. * * * 82/134/5/e .

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