This investigation intends to assess the Pamukkulu Dam intake tunnel portal slope stability and geological characteristics at Takalar Regency. Geological mapping, core drill evaluation, laboratory, and slope stability testing were used in the investigation. The core drill evaluation's objective is Geological Strength Index (GSI) rock quality values for each layer. The laboratory tests measure the stone's specific gravity, cohesiveness, internal friction angle, Unconfined Compression Strength (UCS), and soil-specific gravity values. Slide 6.0 software will employ the Limit Equilibrium Methods (LEM) technique in static and dynamic settings to simulate slope stability utilizing the parameters collected from the core drill assessment and test results. The safety factor of the portal slope is the modeling's output. Based on the geological mapping and drilling log data, it indicated that the lithology on the slopes of the intake and outlet portals is basalt, which is primarily fresh, slightly weathered, and completely weathered basalts with various Geological Strength Index (GSI) rock quality, which includes very poor and very good qualities. The safety factor in the intake tunnel is 2.555 in static and 1.464 in dynamic conditions, so intake portals are safe. The safety factor in the outlet tunnel is 1.222 in static and 0.887 in dynamic conditions, so outlet portals are unsafe. The outlet section requires stabilization measures, including decreasing the slope degree, installing soil nailing and retaining walls, or applying shotcrete. [ABSTRACT FROM AUTHOR]