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reconstruction of the permanent fill volumes (from the 7 December 2009 Colowyo <br />response letter) is shown below. <br />Permanent Fill Volumes PR-02 TR-81 <br /> <br />West Taylor Fill 49,934,000 10,000,000 <br />East Taylor Fill 20,409,000 50,000,000 <br />Total 70,343,000 60,000,000 <br />The Colowyo chart does not match the volume information contained in the Colowyo <br />Permit. The approved text on Page 20 (South Taylor/Lower Wilson-Rule 4, Page 20) <br />states "The East Taylor Fill will contain approximately 50 million yards of permanent <br />out-of-pit spoil and the West Taylor Fill will contain approximately 10 million yards of <br />out-of-pit spoil." The proposed text from TR-81 states "The East Taylor Fill will contain <br />approximately 20.3 million yards of permanent out-of-pit spoil and the West Taylor Fill <br />will contain approximately 50 million yards of out-of-pit spoil." It appears as though the <br />labels on the columns of the Colowyo chart were transposed. Please verify and correct <br />the volumes for the East and West Taylor Fills. Please include a chart and <br />description of the permanent fill volumes 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 />18. In the original permitting of South Taylor (PR-02) Colowyo proposed the East Taylor <br />and West Taylor Fills as permanent fills. These two fills were based on a material swell <br />factor of 20% and were to contain a total of approximately 60 million cubic yards of <br />material (South Taylor/Lower Wilson-Rule 4, Page 20). According to the proposed <br />revisions in TR-81, the swell factor has been adjusted down to 15% (based on the <br />decreased swell for the truck and shovel operation) and the total volume for the East <br />Taylor and West Taylor Fills has been increased to approximately 70.3 million yards of <br />material (an increase of approximately 10 million cubic yards). It would follow that if <br />the material swell factor decreases the amount of excess spoil should necessarily decrease <br />as well. Based on the decrease in swell from 20% to 15% the amount of excess spoil <br />produced should decrease approximately 4.2% (in the case of the East Taylor and West <br />Taylor Fills this would amount to a decrease in excess spoil of approximately 2.5 million <br />yards). Further, based on the mine plan change for the South Taylor Pit approved with <br />TR-69 (approved on 29 May 2008), C:olowyo has changed the direction of mining to the <br />West (as opposed to the original mine; plan which mined to the East) into more shallow. <br />cover and better stripping ratios. This would suggest that the amount of spoil material <br />from the box-cut would be further decreased. Please justify why the amount of excess <br />spoil being placed in the East Taylor and West Taylor Fills is being increased rather <br />than being decreased, as the aforementioned changes would suggest. Please justify <br />and demonstrate why these changes are needed in the text under Rule 4.09 - <br />Disposal of Excess Spoil, which begins on Page 20 (South Taylor/Lower Wilson-Rule <br />4, Page 20) in Volume 12.