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COLOWYO COAL COMPANY <br />CTION 1 - INTRODUCTION <br />Rills and gullies forming in reclamation areas that are regraded and topsoiled if they <br />either (1) disrupt the approved postmining land use or the reestablishment of the <br />vegetative covers or (2) cause or contribute to a violation of water quality standards for <br />receiving streams. These features will be identified during the spring of each year. As <br />part of the spring inspection, regraded and topsoiled areas will be visually inspected and <br />rills and gullies identified. <br />This report provides a summary of any identified rills and gullies, all activities <br />undertaken to remediate these areas, and anticipated time frames for repair. This <br />report will be submitted annually and no later than June 15 of each year. <br />SECTION 2 — IDENTIFIED RILLS AND GULLIES <br />In 2015, two areas encompassing a total of four reclamation blocks have been identified <br />for the repair of rilling and/or gullies. Please see Map 1 for location of identified areas. <br />SECTION 3 — MITIGATION MEASURES <br />Area 1 is located in reclamation blocks WP014, and WPO19 in the West Pit. A small <br />dozer (D6) will repair the rills, the contour ditches that topped over, and the area above <br />the rills that is contributing to the erosion. The area will then be reseeded with the <br />approved seed mix. <br />Area 2 is in the East Pit, Section 15, within reclamation blocks EP057, and EP058 <br />specifically to the South of the Final East Pit Ditch. Many small rills have formed in this <br />area which was topsoiled and seeded in the fall of 2012, and 2014 respectively. <br />Mitigation efforts in this area may include establishment of additional western contour <br />ditches with a small dozer (D6) and correction of any erosion from the existing contour <br />ditches to the Final East Pit Ditch. The many smaller rills will be tracked over by the <br />dozer or repaired accordingly. When the repair has been complete the area mitigated <br />will be reseeded with the approved seed mix for that area. <br />SECTION 4—TIMELINES FOR REPAIR <br />Per permit requirements all areas will be repaired within three months of being <br />identified. These areas were identified during the week of May 25 and June 1, 2015 <br />respectively. Colowyo will ensure repairs to all areas are complete by August 31, 2015, <br />pending appropriate ground conditions. <br />Page 2 <br />