zinvestor,
Please refer to the JORC report:
1,2,3,4, Seam group.
Thickness 1.09m, 1.69m, 1.7m, 2.45m.
"cumulative coal seam" indicates you have to add up all of the coal seam to work out 4.5m"
I am taliking about single coal seam to reckon the operation cost.
Moisture 14% is too high.