T he factor that influences slope stability is the condition of the ground water level. Water increases due to the presence of pores in the rock where water will absorb into the cavities and cracks of the rock. This can cause a reduction in the shear strength of rocks, which is one of the factors causing rocks on slopes to experience problems with their stability. The research location is included in the Barito Basin area. The data used is primary data such as ground water level elevation and hydraulic conductivity, while secondary data is monthly mine design topography, rainfall and material properties. Calculation of repose angle values based on topographic design every month. Data processing using Geostudio 2022 software, SEEP/W analysis for groundwater modeling and SLOPE/W for slope stability analysis. The hydraulic conductivity value is determined through the field slug test method. The repose angle results obtained on the embankment slope were 8.873699˚. The slug test results show that the hydraulic conductivity of the embankment material is 4.2052 × 10-6 m/s. The results of the slope stability analysis in the form of the Safety Factor value show that the groundwater condition on the embankment slope in the research area is close to saturated and the Safety Factor value for the model groundwater level condition is 0.939 on the embankment slope and 1.019 on the highwall.