2011-04-26_REVISION - C1981019 (3)

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lltl I Specifically, Tributary B Ditch is needed in the post-mining case to direct waters from reclaimed lands toward the existing natural drainage shown on Map 41141A. However, its alignment has been shifted north to better follow the Swale being formed in the post-mining topography. Tributary D, as suggested by CDRMS, has been moved west and realigned in its lower reach for the same reason, that is, to better follow the post-mining topography. In addition, the 8050 contour has been adjusted here as suggested to better form the post-mining swale in which the ditch will be constructed. Tributary E is needed to focus post-mining runoff into an existing natural drainage in undisturbed lands below the Section Sixteen Pond Ditch Extension. Its alignment has been shifted slightly, and the post-mining topography has also been adjusted to accentuate the gentle swale in which this ditch will be constructed. Tributary G was located so as to collect runoff from the majority of its tributary watershed. As requested by CDRMS, we have reviewed this subwatershed and do not feel another hardened channel is needed. The Swale to the east that will be formed by the post-mining topography naturally drains toward the lower end of Tributary G, and should be able to convey flows via simple overland flow to the point where Tributary G terminates prior to release in the existing drainage on downstream undisturbed lands. It has therefore not been modified on Map 41141A. Tributary H is needed to focus reclaimed area runoff into another existing drainage on undisturbed lands visible on Map 41141A. The ditch alignment has been adjusted slightly to the west as suggested by CDRMS to better follow the Swale in the post-mining topography created by the southerly trending nose below the 7900 contour. For any tributary ditches whose alignments have changed as described above, corresponding revisions have also been made to the profiles on Map 33B and the ditch details in Table 1 in Exhibit 7, Item 20, Part E. 45. Response Partially Accepted. Colowyo has addressed the mining sequence as requested. On the change sheet Colowyo states that they have provided updated pages South Taylor/Lower Wilson-Rule 2, Pages 99-104. Page 103, however, was missing from the submittal. Please provide two copies of South Taylor/Lower Wilson-Rule 2, Page 103 for review. Please ensure that the page flows from page 102 and to page 104. Response. Page 103 has been provided as requested.