Dewatering requirements assessment for the Central Kalimantan NCP open pit gold mine

One of the most critical aspects open pit mining is dewatering and mine drainage systems. The NCP Open Pit Gold Mine located in Central Kalimantan. This study area has a range rainfall intensities durations from moderate to heavy. Good required manage runoff water reduce entering front loading. used daily intensity data 1994 2018. Using Mononobe Method, hydrological for this were evaluated by determining value plan. According evaluation 2018, research saw 86.23 mm/day over two-year return period. majority extracted mines precipitation rather than groundwater. An channel was made around pit, flowing naturally into sump area. pumped settling pond with 520 m3/hour 780 capacity pumps.