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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. <br />MR -146: Minor Revision No. 146 was submitted on October 7, 2015. MR -146 was considered <br />complete on October 16, 2015, and was approved / issued on November 16, 2015. The revision <br />proposed to include a stream buffer zone variance for historical and pre-existing mine related <br />structures in Taylor Creek, Good Spring Creek, and the West Fork of Good Spring. <br />MR -147: Minor Revision No. 147 was submitted on October 9, 2015. MR -147 was considered <br />complete on October 19, 2015, and was approved / issued on October 26, 2015. The minor revision <br />proposed to adjust ground clearance under sections of power lines to their required height. All <br />disturbance activities were to be contained within Tri -State's 150' right-of-way and were not <br />associated with Colowyo's mining activities. <br />MR -148: Minor Revision No. 148 was submitted on December 21, 2015. MR -148 was considered <br />complete on December 31, 2015, and was approved / issued on January 11, 2016. The revision <br />proposed to incorporate the as-builts for three stock ponds constructed in the West Pit reclamation <br />during 2015. <br />MR -149: Minor Revision No. 149 was submitted on January 4, 2016. MR -149 was considered <br />complete on 1/12/2016, and was approved / issued on February 11, 2016. The minor revision <br />incorporated a cumulative bond schedule for construction of the Collom Haul Road in the PAP. <br />MR -150: Minor Revision No. 150 was submitted on. January 12, 2016. MR -150 was considered <br />complete on January 22, 2016, and was approved / issued on February 11, 2016. The minor <br />revision Proposed geotechnical drilling at fifteen sites within the disturbance footprint of the <br />Collom Facilities area, Collom Haul Road, and at Collom Haul Road/County Road 51 crossing. <br />MR -151: Minor Revision No. 151 was submitted on March 2, 2016. MR -151 was considered <br />complete on March 8, 2016, and was approved / issued on April 4, 2016. The minor revision <br />Documented ground disturbing activities associated with emergency access road to replace a <br />broken power pole. On February 18, 2016, the Colowyo Mine experienced a very high wind event <br />which snapped the base of one of Colowyo's power poles. <br />PR -04, Colowyo Coal Mine C1981-019 15 August 2016 <br />