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final topography in the South Taylor Pit. This decrease will be further amplified by the <br />truck/shovel material that will be direct hauled to the pit as mining progresses. <br />Pursuant to Rule 1.04, excess spoil is, by definition "...material not necessary to <br />achieve the approximate original contour..." Please provide the Division with a <br />detailed justification why the additional 10.3 million yards of spoil material (in <br />addition to the decreased spoil of 4 million yards due to the decreased swell factor) <br />meets the definition of excess spoil and is not required to meet AOC, keeping in <br />mind that the Division has already granted Colowyo a variance in AOC for steep <br />slope mining and will not grant a further variance without good cause. <br />Rule 2.10 - Maps <br />4. Colowyo has provided a new map with the submittal of TR-81, Map 45 - South Taylor <br />Fill. This map shows the locations of the permanent East Taylor and West Taylor Fills as <br />well as the locations of the three temporary overburden stockpiles (one on the West <br />Taylor Fill, one on the East Taylor Fill and one on the backfill in the final cut of the <br />Section 16 Pit). This map also shows several cross-sections through the piles. The <br />Division does not understand why Colowyo has included cross-section E-E', which runs <br />basically north-south. This cross-section parallels cross-section A-A' and is only 100 <br />feet to the east of cross-section A-A' (cross-section E-E' is also approximately 460 feet <br />shorter than cross-section E-E'). A more useful cross-section that is missing from the <br />map would be a cross-section that runs across both the Section 16 temporary overburden <br />pile and the East Taylor Fill, in a southeast to northwest direction. Another cross-section <br />that would be useful (in lieu of cross-section E-E') would be one that cut across the West <br />Taylor Fill, the East Taylor Fill and the Section 16 temporary overburden pile in a west to <br />east direction. Please explain why Colowyo has provided the two seemingly identical <br />cross-sections A-A' and E-E' on Map 45. Please provide at least one north-south <br />cross-section that covers the three piles. Please update Map 45 as necessary based <br />on the review of the cross-section lines shown. <br />5. Map 19B - Postmining Topography - South Taylor Area <br />a. Please add stationing tick-marks to the cross sections. <br />b. A portion of slope located approximately 1000' west of the "20" appears to be <br />steeper than 3H:1V. Section 2.05.4(2)(c) Backfilling Plan for South Taylor/Lower <br />Wilson states the Colowyo will grade all final slopes so that overall grades do not <br />exceed 33% (3h:lv). Please review the proposed postmining topography to <br />ensure that no slopes will exceed 33%. <br />6. Map 23A - Mine Plan - South Taylor Area <br />a. Cross Section locations are not shown on this map, but would be useful for <br />comparison with other permit maps. Please add ST sections A-A', B-B', C-C', D- <br />D' and E-E' as they are shown on Map 19B, including stationing tick-marks.