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10. In addition to using the East Taylor Fill as a temporary overburden stockpile, <br />Colowyo is now proposing to use the West Taylor Fill for a temporary <br />overburden stockpile as well. The proposed plan to use the West Taylor Fill for <br />stockpiling overburden material is new. Colowyo has not provided any <br />information regarding the volume of spoil that will be temporarily stockpiled on <br />the West Taylor Fill. Additionally, Colowyo has not provided any designs or <br />details regarding the construction of this temporary overburden stockpile (besides <br />new Map 45). Finally, Colowyo has not provided any engineering reports or <br />geotechnical stability analyses for the temporary overburden stockpile or any <br />reports verifying the long-term stability of the West Taylor Fill with the additional <br />overburden material stockpiled on it. Please provide the Division with the <br />volume of spoil planned for the temporary overburden stockpile, detailed designs <br />and construction information and engineering reports and geotechnical stability <br />analyses of the temporary overburden stockpile and the West Taylor Fill. In <br />addition, Please update the text regarding this temporary overburden stockpile in <br />Section 2.05.3(6) of Volume 12 and Maps 35A and 40A. <br />11. In the plan initially submitted as a part of Permit Revision 02, Colowyo planned <br />on temporarily stockpiling approximately 30 million yards of spoil on the East <br />Taylor Fill (TS West 1 and TS West 2) and stockpiling approximately 12 million <br />cubic yards of spoil on a reclaimed area of the Section 16 Pit (TS East 1, just East <br />of the East Taylor Fill). Colowyo has not provided any text or detail regarding <br />whether or not this stockpile would still be used, although it does not appear on <br />the new Map 45. Please explain the plans for this temporary overburden stockpile <br />and update the appropriate text in Section 2.0.5.3(6) of Rule 2, Volume 12 and <br />Maps 35A and 40A. <br />12. In addition to addressing the temporary overburden stockpile TS East 1 in <br />question 11 above, Colowyo also needs to provide updated Maps 35A and 40A <br />with the information regarding the two proposed temporary overburden stockpiles <br />on the West and East Taylor Fills. <br />This concludes the incompleteness review for Colowyo's Technical Revision 81. As <br />stated above, once the Division has received the above requested information, a second <br />completeness review will begin. Please contact me at (303)866-3567 X8145 if you have <br />any questions or need any additional information. <br />Sincerely, <br />James R. Stark <br />Environmental Protection Specialist <br />cc: Sandy Brown