Dams are important structures where safety is of utmost importance. They are complex structures subjected to various forces. Failure of dams leads to catastrophic event with sudden release of water and is of great concern. The response of a dam subjected to seismic loading, exhibits a combined effect of the interaction among dam, reservoir and foundation systems. Hence there is significant importance in studying the various aspects influencing the seismic response of a large concrete gravity dams for safe and long lasting service. In this study, a 3 dimensional finite element model of an overflow dam is created using solid elements in STAAD PRO V8i. All the forces are calculated and applied as loads and load combinations for most adverse cases. The objective of the present work is to study the responses of the dam such as stability and stress concentrations at different locations of the overflow dam for all the load combinations specified in IS 6512-1984. The model is analys