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Data management and processing play a vital role for the success of large scale construction projects.This paper presents an example of how managing extensive data sets during complex tunneling projects.As an example the web-based software tool HYDRA is introduced which allows the monitoring of data gathered during the construction process leading to a efficient process control and optimization.The paper shows how large quantities of data from the electrical,hydraulic and surveying system can be stored and how they are correlated with data from the design,geology and settlement measurements.Furthermore,it is possible to extend the software into new web-tools comprising cut and wear prognosis or the management of separation plants.Data management using software tools like HYDRA reduce the work load on reporting and offer efficient ways of trigger value monitoring.