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the temporary overburden stockpile is approximately a 90° angle on Map 45. The same <br />corner of the temporary overburden stockpile on the West Taylor Pond figures and in the <br />Shannon and Wilson report is more of a point. There is also a difference in the southeast <br />corner of the temporary overburden stockpile plan. On Map 45 the southeast corner is <br />basically a flat area, connecting with the southwest and northeast corners of the pile. In <br />the West Taylor Pond figures and in the Shannon and Wilson figure the temporary <br />overburden stockpile again comes to a point. Second, the toe of the East Taylor Fill on <br />Map 45 and Figure 1 of the Shannon and Wilson report is not well defined as such. The <br />plan view on the map and Figure 1 shows the toe of the pile ending abruptly at the 7,700 <br />foot elevation line and not toeing out to a point as shown on Figures 1C-4 and 1-C5 <br />(where the East Taylor East Tributary Ditch and East Taylor West Tributary Ditch meet <br />up). There is a distinct toe for the West Taylor fill on Map 45 and all of the <br />aforementioned Shannon and Wilson figures. Please review the plan view for the East <br />Taylor Fill on Map 45, Exhibit 7, Item 20, Figures 1 C-4 and 1 C-5 and Figure 1 of the <br />Shannon and Wilson report and make the necessary changes/corrections to the temporary <br />overburden stockpile configuration and the toe of the permanent fill. <br />Based on the Division's review of the materials and information submitted in response to <br />the Division's original question 22 (above), Colowyo has not addressed this question. <br />First, in the response Colowyo states that Figures 1 C-4 and 1 C-5 of Exhibit 7, Item 20 <br />have been revised. These figures were not included in the 1 June 2010 Colowyo <br />submittal. Second, Colowyo states that the large, flat toe of the East Taylor Fill, ending <br />at the elevation line of 7,700 feet, is correct. Colowyo further states that this toe will be <br />approximately 400 to 500 feet wide. Based on a review of the East Taylor Fill, cross- <br />section A-A' shows that the final toe of the fill is at an elevation of approximately 7,550 <br />feet of elevation. This cross-section shows that if the fill was to end at the 7,700 foot <br />elevation point, there would be a drop-off of approximately 200 feet to reach the original <br />ground surface. Further, a review of Map 41 A - Watershed Boundaries for Hydrologic <br />Modeling-South Taylor Area, shows the fill toeing out at an elevation of approximately <br />7,550 feet, at the confluence of the East Taylor West Tributary Ditch with the East Taylor <br />East Tributary Ditch. Additionally, there are contour ditches shown on the face of the <br />East Taylor Fill (on Map 41A) at elevations of 7,700 feet and 7,600 feet, which would <br />not be possible if the fill toed out at 7,700 feet as depicted on Map 45. Third, Colowyo <br />has added what appears to be a large drain or notch to the East Taylor Fill. This drain or <br />notch is on the southwest edge of the fill (south of the E-E' cross-section line and east of <br />the A-A' cross-section line). Fourth, cross-section E-E' shows that between <br />approximately station 60+00 and station 70+00 the East Taylor Fill will gradually rise <br />from an elevation of 8,050 feet to an elevation of 8,150 feet and back down again to <br />approximately 8,050 feet. (Cross-section C-C' also depicts this hump from <br />approximately station 24+00 to station 43+85.6.) This hump is not depicted in Map 41 A. <br />On Map 41A the elevation of the East Taylor Fill gradually rises to approximately 8,050 <br />feet and ties in at that point. <br />a. Please submit revised Figures 1C-4 and 1C-5 of Exhibit 7, Item 20 to address <br />the concerns of the Division's original adequacy question.