In order to control the technical and financial aspects of the civil engineering contribution to the LHC project, an autonomous data management tool has been put in place to integrate drawings, schedules and budget control. To assemble this very heterogeneous data in its support, contents, and naming, a uniform Product Breakdown Structure (PBS) has been introduced between the different files. For updating reasons, the technical menu has a direct access to the CERN Drawings Directory (CDD). The budget menu compares, for each structure, the initial estimates with the actualized ones, the latter compared permanently with the paid invoices. The total amount of the civil engineering cost is available online
