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5731 State Highway 13 ♦ Meeker, Colorado 81641 ♦ 970- 824 -1200 <br />July 2, 2013 <br />Mr. Rob Zuber <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining & Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />OF R�CU�nON <br />SPF_ <br />RE: Colowyo Coal Company L.P., Mine Permit C -81 -019, Technical Revision <br />No. 99 (TR -99), East Taylor Out of Pit Spoil Revision <br />Dear Mr. Zuber, <br />Enclosed, please find three (3) copies of technical revision JR) 99. TR -99 revises <br />the design and the volume of material in the East Taylor Fill. Specifically, this <br />revision seeks to lower the amount of temporary out -of -pit spoil material contained <br />within the East Taylor Fill. <br />Within this proposed revision, Map 45 has been revised to reflect the current <br />condition of the temporary out -of -pit spoil pile, which as proposed will become the <br />final design surface. This revised surface also includes a reduction in total volume <br />out -of -pit spoil material which has been presented in Volume 12 of Colowyo's <br />permit application package (PAP). This reduction in the out -of -pit spoil volume <br />will not affect the excess spoil evaluation presented in Exhibit 21 of PAP. <br />Furthermore, Colowyo requests the Division calculate the revised bond amount <br />that will be generated by this proposed change. <br />Also included with this technical revision are a revision application, a copy of the <br />proposed public notice for your review, and a change of index sheet to ease <br />incorporation into the permit document. If you should have any additional <br />questions or concerns please feel free to contact Tony Tennyson at (970) 824- <br />1232. <br />A na ining pi- operty of Western Fuels - Color ado, A Limited Liability Company <br />