The numerical analysis of seepage and stability in earth-fill and rock-fill dams focusses on a specific case study. Earth dam failures can result from structural instability, hydraulic conditions, seepage through the dam body, or rapid drawdown. Assessing the factor of safety for dam slope stability under various operational conditions is crucial for ensuring overall safety. The primary objectives of this study are to analyze seepage and stability, observe the phreatic line behavior within the dam, estimate seepage through the foundation or embankment, evaluate exit gradients and pore pressure, and determine the minimum factor of safety along with locating the critical slip surface for Polavaram CFRD dam. Laboratory experiments on soil samples were conducted to determine soil properties. Limit equilibrium method (LEM) using GeoStudio software, particularly the SEEP/W and SLOPE/W sub-programs, was employed for simulating seepage and stress analysis in earth dams. SEEP/W analyzes the phreatic seepage surface, pore water pressure distribution, and total hydraulic head variation, while SLOPE/W assesses the stability of upstream and downstream slopes and calculates the factor of safety. The research proposes solutions, verified through GeoStudio software, to address seepage and stability concerns in earth-fill and rock-fill dams.