At ML (Mining License) Air Laya mine, PT. Bukit Asam has a MDP (Mud Deposition Pond) of 21 ML. In the management of acid mine water in ML Air Laya Bukit Asam mine comes from a variety of conditions, such as from the stockpile, excavation, sump, stockpile, etc. the initial pH of acid mine water at each MDP varies with a range of 5-6. In their management they use active and passive methods (combi…