37 inches to 45 inches (inclusive) - | 2% of gross value of coal produced from the seam |
less than 37 inches - | 1% of gross value of coal produced from the seam |
Ave. Coal Seam = Aa + Bb + Cc . . . + Nn
Thickness A + B + C . . . + N,
when A, B and C are areas between two contiguous isopach lines (planimeter blocks), and a,b, and c are the corresponding arithmetic average thicknesses (in inches) of the coal seam between two such lines (for instance, isopach line 1 = 42", isopach line 2 = 39", average thickness = 40.5") and N and n are subsequent items (if any) in the series.
For example, where the thicknesses of a seam of coal are a = 28.5 in., b = 31.5 in. and c = 39.5 in., and the corresponding areas are A = 100,000 in2., B = 100,000 in2. and C = 50,000 in2.,
Ave. coal seam thickness=100,000 in.2 x 28.5 in. + 100,000 in.2 x 31.5 in. + 50,000 in.2 x 34.5 in.
100,000 in.2 + 100,000 in.2 + 50,000 in.2
= 2,850,000 in.3 + 3,150,000 in.3 + 1,725,000 in.3 = 7,725,000 in.3 250,000 in.2 250,000 in.2
= 30.9 in., which is taxable at the 1% rate.
Planimeter blocks should be numbered to correlate with the block numbers provided on the supporting tax schedule.
line 1 - line 2 = 42 in. - 39 in.
4 = 4 = 0.75 in.
Ave. coal seam thickness = 42 in. - 0.75 in. = 41.25 in.
W. Va. Code R. § 110-13AB-4