This research focuses on the coal environment, especially the relation between the depositional environment (TPI-GI) with coal quality and acid water mining. Tissue Preservation Index (TPI) and Gelification Index (GI) are secondary analyzes of the coal depositional environment. The analysis of TPI-GI was carried out based on the analysis of Diesel, 1986. Coal Quality and Acid Water Mining have a relation, especially where coal is deposited, therefore...