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<br /> <br /> <br /> <br />PR-04, Colowyo Coal Mine C1981-019 14 August 2016 <br /> <br />MR-137: Minor Revision No. 137 was submitted on January 5, 2015. MR-137 was considered <br />complete on January 12, 2015, and was approved / issued on February 12, 2015. The minor <br />revision revised the Reclamation Cost Estimate in the PAP per RN-06 and TR-99. <br /> <br />MR-138: Minor Revision No. 138 was submitted on January 6, 2015. MR-138 was considered <br />complete on January 12, 2015, and was approved / issued on February 20, 2015. The minor <br />revision updated information regarding ownership and control of the Colowyo Mine. This was <br />done to meet the requirements of Rule 2.03.4, Identification of Interests. <br /> <br />MR-139: Minor Revision No. 139 was submitted on January 9, 2015. MR-139 was considered <br />complete on January 14, 2015, and was approved / issued on February 19, 2015. The minor <br />revision proposed changes to Map 28 – Topsoil Handling South Area to correct topsoil <br />replacement locations. There were no proposed changes to the mine’s permitted, disturbed or <br />affected acreages. <br /> <br />MR-140: Minor Revision No. 140 was submitted on February 25, 2015. MR-140 was considered <br />complete on March 3, 2015, and was approved / issued on August 17, 2015. The minor revision <br />revised the as-built for the Work Area Pond to reflect the reconstruction of the primary spillway <br />and the removal of the dewatering valve. <br /> <br />MR 141: Minor Revision No. 141 was submitted on May 4, 2015. MR -141 was considered <br />complete on May 14, 2015, and was approved / issued on September 25, 2015. The minor revision <br />updated Exhibit 23A to include in-pit drilling locations. <br /> <br />MR-142: Minor Revision No. 142 was submitted on May 15, 2015. MR-142 was considered <br />complete on May 26, 2015, and was approved / issued on June 4, 2015. The minor revision <br />proposed two new substation locations and two new topsoil windrow locations. <br /> <br />MR-143: Minor Revision No. 143 was submitted on August 12, 2015. MR-143 was considered <br />complete on August 14, 2015, and was approved / issued on August 24, 2015. The minor revision <br />proposed a geotechnical drilling program related to the Collom haul road. <br /> <br />MR-144: Minor Revision No. 144 was submitted on September 14, 2015. MR-144 was considered <br />complete on September 15, 2015, and was approved / issued on September 15, 2015. The minor <br />revision proposed to enlarge the footprint for Topsoil Stockpile 16C, and to direct haul of topsoil <br />from Topsoil Pile 16I. <br /> <br />MR-145: Minor Revision No. 145 was submitted on September 29, 2015. MR-145 was considered <br />complete on October 9, 2015, and was approved / issued on October 20, 2015. The minor revision <br />proposed to include a coal stockpile located within the West Pit to allow advancement of spoil <br />grading.