PT Ulima Nitra is a mining contractor company working on contracts at PT Mine Muara Enim, Muara Enim Regency, South Sumatra Province. The mining system being worked on is an open pit mining system (surface mining) using the open pit mining method. Slippery is a haul road that is slippery due to rain. Slippery road conditions result in the means of conveyance not being able to operate properly. …