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mining topography for most of the South Taylor Pit. Please review the new post-mining <br />topography and see if the concerns expressed separately above in Item 19 still exist. We <br />believe the new proposed topography renders this issue moot. <br />20. The final configuration for the East Taylor Fill, as shown on Map 41A - Watershed <br />Boundaries for Hydrologic Modeling, shows that the upper (southern) portion of the fill will <br />be a large, flat area. This flat area will cover approximately 110 acres. Pursuant to Rule <br />4.09.2(7), please describe how Colowyo plans to divert the runoff from this large, flat <br />area of the pile into stabilized ditches which will safely pass the 100-year, 24-hour <br />storm event. Please include this description in the text under Rule 4.09 - Disposal of <br />Excess Spoil, which begins on Page 20 (South Taylor/Lower Wilson-Rule 4, Page 20) <br />in Volume 12. <br />Response: The post-mining topography is being significantly revised with this submittal, <br />and the limits of the above described ditches have been adjusted to the new post-mining <br />topography. <br />21. The final configuration for the West Taylor Fill, as shown on Map 41A - Watershed <br />Boundaries for Hydrologic Modeling, shows that the middle portion of the fill will be a large, <br />flat area. This flat area will cover approximately 70 acres. Pursuant to Rule 4.09.2(7), <br />please describe how Colowyo plans to divert the runoff from this large, flat area of <br />the pile into stabilized ditches which will safely pass the 100-year, 24-hour storm <br />event. Please include this description in the text under Rule 4.09 - Disposal of <br />Excess Spoil, which begins on Page 20 (South Taylor/Lower Wilson-Rule 4, Page 20) <br />in Volume 12. <br />Response: Please refer to the response to above Comment No. 20. <br />22. Colowyo has provided a new Map 45 - South Taylor Fill, which shows the East <br />Taylor and West Taylor Fill plans and cross-sections. This plan view information (less the <br />cross-section details) for the East Taylor and West Taylor Fills is also shown on Exhibit 7, <br />Item 20, Figures 1 C-4 and 1 C-5 - West Taylor Pond Drainage and Figure 1 of the Shannon <br />and Wilson report. There are, however, two discrepancies between Map 45 and Figures <br />1C-4 and 1C-5 and Figure 1 of the Shannon and Wilson report with regards to the plan <br />view for the East Taylor Fill. First, the configuration of the topography lines of the <br />temporary overburden stockpile on the East Taylor Fill is different in the figures as <br />compared to the map. The northwest corner of the temporary overburden stockpile is <br />approximately a 90° angle on Map 45. The same corner of the temporary overburden <br />stockpile on the West Taylor Pond figures and in the Shannon and Wilson report is more of <br />a point. There is also a difference in the southeast corner of the temporary overburden <br />stockpile plan. On Map 45 the southeast corner is basically a flat area, connecting with the <br />southwest and northeast corners of the pile. In the West Taylor Pond figures and in the <br />Shannon and Wilson figure the temporary overburden stockpile again comes to a point. <br />Second, the toe of the East Taylor Fill on Map 45 and Figure 1 of the Shannon and Wilson <br />report is not well defined as such. The plan view on the map and Figure 1 shows the toe <br />of the pile ending abruptly at the 7,700 foot elevation line and not toeing out to a point as <br />shown on Figures 1C-4 and 1-C5 (where the East Taylor East Tributary Ditch and East <br />Taylor West Tributary Ditch meet up). There is a distinct toe for the West Taylor fill on Map