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Reconciliation of Permit Acreage with Permit Revision No. 3
<br />3.2.3 Coal Resources to be Mined
<br />Eight major coal seams are mined in the East Pit, West Pit, and Section 16 Pit at the Colowyo
<br />Mine. These are the "Y, "X," "A", "B ", "C ", "D", "E" and "F" seams (PAP, page 5). The seams
<br />vary in thickness from 2.5 to 15 feet, and overburden thickness varies as a function of structural
<br />geology and topography.
<br />In the South Taylor Mining area, 17 seam and sub -seam complexes are mined. The seams are
<br />the "A ", "B ", "C ", "D ", "E ", F" and "G" seams and their seam complexes (for example, the G-
<br />Seam is separated into G7, G8 and G9 in the South Taylor Area). The seams vary in thickness
<br />from 1.5 feet to 17 feet and the overburden and interburden thicknesses vary, on average, from 2
<br />feet to 65 feet. Figure 2.04.6 -313 in the PAP contains a generalized diagram of the seams to be
<br />mined as well as the overburden and interburden.
<br />In the Collom expansion area, Colowyo will mine coal in the Danforth Hills coal field. Two coal
<br />seams, "Y' and "X" will be mined in the relatively shallow Little Collom X Pit. Coal seams
<br />"Y ", " X", "A ", `B ", "C ", "D ", "E ", "F" and "G" seams are proposed to be mined in the Collom
<br />Lite Pit. Seam thicknesses vary in the Collom expansion area with seam thicknesses of 5 to 11
<br />feet common. The general stratigraphy within the Collom permit expansion area is depicted in
<br />Exhibit 6, Item 7, Figure 3. 1, and Exhibit 6, Item 8.
<br />Colowyo Coal Mine C1981 -019 PR -03 21 April 10, 2013
<br />Renewal 5
<br />Permit Revision 3
<br />Change
<br />acres
<br />acres
<br />acres
<br />Mineral Ownership
<br />Federal
<br />9,956.49
<br />24,332.97
<br />+14,376.48
<br />State
<br />650.21
<br />1,287.21
<br />+637.00
<br />Private
<br />1,644.25
<br />3,455.56
<br />+1,811.31
<br />Total
<br />12,250.95
<br />29,075.74
<br />+16,824.79
<br />Surface Ownership
<br />Federal
<br />2,290.19
<br />4,815.37
<br />+2,525.18
<br />State
<br />640.00
<br />1,277.00
<br />+637.00
<br />Private
<br />9,320.76
<br />12,983.37
<br />+ 13,662.61
<br />Total
<br />12,250.95
<br />29,075.74
<br />+16,824.79
<br />3.2.3 Coal Resources to be Mined
<br />Eight major coal seams are mined in the East Pit, West Pit, and Section 16 Pit at the Colowyo
<br />Mine. These are the "Y, "X," "A", "B ", "C ", "D", "E" and "F" seams (PAP, page 5). The seams
<br />vary in thickness from 2.5 to 15 feet, and overburden thickness varies as a function of structural
<br />geology and topography.
<br />In the South Taylor Mining area, 17 seam and sub -seam complexes are mined. The seams are
<br />the "A ", "B ", "C ", "D ", "E ", F" and "G" seams and their seam complexes (for example, the G-
<br />Seam is separated into G7, G8 and G9 in the South Taylor Area). The seams vary in thickness
<br />from 1.5 feet to 17 feet and the overburden and interburden thicknesses vary, on average, from 2
<br />feet to 65 feet. Figure 2.04.6 -313 in the PAP contains a generalized diagram of the seams to be
<br />mined as well as the overburden and interburden.
<br />In the Collom expansion area, Colowyo will mine coal in the Danforth Hills coal field. Two coal
<br />seams, "Y' and "X" will be mined in the relatively shallow Little Collom X Pit. Coal seams
<br />"Y ", " X", "A ", `B ", "C ", "D ", "E ", "F" and "G" seams are proposed to be mined in the Collom
<br />Lite Pit. Seam thicknesses vary in the Collom expansion area with seam thicknesses of 5 to 11
<br />feet common. The general stratigraphy within the Collom permit expansion area is depicted in
<br />Exhibit 6, Item 7, Figure 3. 1, and Exhibit 6, Item 8.
<br />Colowyo Coal Mine C1981 -019 PR -03 21 April 10, 2013
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