P Pit geometry adjustment based on geotechnical recommendations directly affects overburden volume, mineable coal reserves, stripping ratio, and the adequacy of excavating and loading equipment capacity. this study aims to analyze the impact of such adjustments at pit rts block cf, pt kideco jaya agung, for the year 2026, by comparing the rkab 2026 pit design with the geotechnical revised pit design across eight cross-sections (a-a\\\' through h-h\\\') using minescape and microsoft excel. the analysis reveals cutbacks on cross-sections a-a\\\', b-b\\\', and d-d\\\' that expose new coal seam potential; offsets on c-c\\\' and e-e\\\' that narrow the excavation boundary, accompanied by a pit floor rise to −194 m on e-e\\\'; cross-section f-f\\\' showing no change in slope wall but a pit floor rise to −194 m; a southern boundary shift on g-g\\\'; and the addition of a new mitigation area h-h\\\' absent in the rkab 2026 design. the pit geometry adjustment results in changes to the overall slope angle (osa) across all reviewed cross-sections, with the rkab 2026 design osa ranging from 4.21°–22.91° and the geotechnical design osa ranging from 1.87°–22.73°, where seven out of ten slope sides experienced a decrease in osa and three sides experienced an increase in accordance with actual geotechnical conditions. overburden volume decreased from 15.46 to 10.35 million bcm (33.1%), mineable coal reserves from 2.78 to 2.03 million tons (27.1%), and stripping ratio from 5.57 to 5.11, indicating that the geotechnical pit design is technically and economically more efficient than the rkab 2026 design. the excavating and loading fleet capacity of 10,295,114 bcm/year results in a deficit of 52,336 bcm (0.5%) against the geotechnical overburden requirement. production achievement reaches 84.1% for overburden and 84.6% for coal against the rkab 2026 target, necessitating equipment capacity optimization and identification of additional mining areas outside pit rts block cf.