Estimating maximum scour depth is normally required in order to determine the depth of bridge piles. The present paper uses the SSIIM Software which considers flow and sediment equations in a three dimensional manner. The software models flow field around circular bridge pile by resolving Navier-Stokes three-dimensional equations and k- method, and by temporary solution of flow field and continuity equations variations of bottom levels around bridge pile was determined. In order to verify the results of the simulated model, they were compared with those of laboratory experiments. The results indicate that the model can be used with high accuracy to simulate scour and estimating scour depth around bridge piles. Manuscript profile