In this study, Bah&ccedil / elik Dam, which is located in Kayseri Province, is investigated by means of horizontal movement due to reservoir loading and seepage inside the core and body. Two dimensional plain strain finite element analyses are carried out in order to find total stresses, displacements and pore water pressures. Mohr-coulomb soil model is used to represent elastic behavior of rock-fill material. Since there is no information about material used in dam body, material parameters are determined by sensitivity analyses being in the range of data acquired from literature survey. Calculated displacement and pore water pressures are compared to the data taken from field survey on actual dam body. As a conclusion remark, it is beleived that the horizontal displacement behaviour of two systems, such as real dam and computer modelling, would not match excatly since the materials used in real dam body would behave as plastic whereas that used in computer modelling assumed to be elastic.