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COLOWYO COAL COMPANY <br />SECTION 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 2013, three specific rills and two reclamation areas have been identified for rilling <br />and /or gullies. Please see Map 1 for location of identified areas. <br />SECTION 3 — MITIGATION MEASURES <br />Area 1 is located in reclamation block WPO14 to the West of the West Pit out of pit spoil <br />pile. A small dozer (D6) will repair the rill, the contour ditch in which it topped over, and <br />the area above the rill that is contributing to the erosion will be mitigated through <br />reclamation efforts later this fall. The area will then be reseeded with the approved <br />topsoil seed mix. <br />Area 2 is located on the face of the West Taylor Fill within reclamation block ST002. This <br />area was topsoiled in 2012 and does not exhibit any large rills or gullies, but rather <br />several small rills. Colowyo has repaired the small rills within this reclamation block <br />with a small dozer (D6), and roughened the topsoil surface (on the contour). No <br />additional mitigation needs to occur at this time. <br />Area 3 is in the East Pit, Section 15, within reclamation block EP057, specifically to the <br />South of the Final East Pit Ditch. Many small rills have formed in this area which was <br />topsoil and seeded in the fall of 2012. One section of the western contour ditch within <br />this reclamation block was breached. Mitigation efforts in this area will include <br />reestablishment of the western contour ditch with small dozer (D6) and correction of <br />the erosion from the contour ditch to the Final East Pit Ditch. The many smaller rills will <br />be tracked over by the dozer or repaired accordingly. When the repair has been <br />complete the area mitigated will be reseeded with the approved seed mix for that area. <br />Page 2 - <br />