External and internal examination of dams are required during their life time. Long term surveillance program can ensure dams owner of their safe operation. Long term surveillance requires instrument installation and monitoring to assess the performance of structures with respect to design parameters. Design of monitoring installations is to measure displacement, settlement, strain, stress, piezometric pressures, seepage, uplift, flow velocity and water levels, and alarm systems as required for a particular impoundment. Compilation of results on a computerized data base is done and results are interpreted and reported in the form of recommendations outlining appropriate action need to be taken, when it is necessary.

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