Long Lees area lie on Kecamatan Busang and Kecamatan Baturedi, Kabupaten Kutai Timur,Pprovinsi.Kalimantan Timur. As geographic bounded by coordinatell6°30'()(}" - 116°45'()(}" East Longitude and 00°45 '00'' - 01°00 '00'' North Latitude. Long Lees area is a part of KutaiBasin that consist of Ternary sediment of Marah Formation, Batuayau Formation, Wahau Formation and Balikpapan Formation of Eocene until Mio-Pliocene Age. The uncormity between Batuayau. Wahau and Balikpapan Formations were caused by tectonic activity in Oligocene, Miocene and Pliocene. Coal bearing formation in this area are Batuayau Formation, Wahau Formation and Balikpapan Formation. Dissemination of coal in that formations were deformed to form a synclinal fold, with the direction of fold axis is Northeast - Southwest. There are two to four main coal layers with thickness ranges 6.10- 2280 m There is no difference in quality among the coal in the three formations. Coal of Batuayau Formation characteristized by ash content 3.18-9.39% (adb) or average 0.23%, Sulphur content 0.17-0.35% (adb) or average 0.23% and Calorific Value 5100 - 5225 callgr or 5195 cal/gr. Coal of Wahau Formation characteristized by ash content 258-6.11% (adb) or average 4.56%, Sulphur content 0.11-0. 15% (adb) or average 0. 13% and Calorific Value 5405 - 5510 cal/gr or 5460 cal!gr. Coal of Balikpapan Formation characteristized by ash content 3.28-3.78% (adb) or average 3.43%, Sulphur content 0.11- 0. 18% (adb) or average 0. 13% and Calorific Value 5245 -5590 cal/gr or 5440 cal/gr. Coal resources until lOOm depth and minimum thickness 1,0 m are 1,403 million tonnes, that consist of 881,2 million tonnes as hypothetical resources and 521,9 million tonnes us inferred resoureces. Coal deposits of Long Lees area have a great resources and clean quality bUI probably has problem in transportation.

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