The energy and water demands have constantly been increasing all over the world due to rising population and due to advances in science. This fact obligates the usage of natural resources to supply more and more water and energy. Of course, the most important structures that can serve this purpose are dams. However, the behaviour of dams, especially under the effect of seismic actions, is one of the most complicated problems in earthquake engineering. This is because; dams usually rest on flexible foundations and interact with the water, which necessitates taking the dam-foundation-reservoir interaction into account. Also, complex geometry of the valley and the dam necessitate considering higher mode effects. A number of different linear elastic boundary element and finite element procedures were proposed in the literature to analyze the three dimensional dam-foundation-reservoir interaction problem rigorously. On the other hand, the seismic behaviour of concrete gravity dams has not been investigated experimentally in detail other than a few shaking table test programs because of the difficulties encountered during experimental simulations like hydrodynamic effects, huge sizes, etc. Consequently, the aim of this study is to carry out a pseudo dynamic test on a scaled concrete gravity dam. The base cracking, sliding, base shear capacity and crest displacements of the dam under three different hazard levels will be investigated.