Coal mining of PT Satria Bahana Sarana is carried out using the open pit method. The open pit mining method will produce a depression that will be filled with water when it rains. In the E Banko pit of PT Satria Sarana Bahana there is a void filled with water located in the e banko pit. The void enters the boundary pit in the LOM (life of mine) design, which is right between the void and the pi…