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Colowyo Coal Company <br />2011 Rill & Gullylnspection Report <br />SECTION 1- INTRODUCTION <br />Rills and gullies which form in areas that have been regraded and topsoiled and <br />which either (1) disrupt the approved postmining land use or the reestablishment of <br />the vegetative covers or (2) cause or contribute to a violation of water quality <br />standards for receiving streams will be identified during the spring of each year. <br />Regraded and topsoiled areas will be visually inspected and rills and gullies identify. <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 no later than June 15 of each year. <br />SECTION 2 - IDENTIFIED RILLS AND GULLIES <br />In 2011, five areas have been identified for remediation. Please see Map 1 for location <br />of identified areas. <br />SECTION 3 - MITIGATION MEASURES <br />Area 1 is in the West Pit, Section 4, on the North edge of the 2010 reclamation block. <br />A small dozer (D6) will salvage topsoil from the edges of the rill, then regrade the <br />rilling area, and reapply topsoil on the small disturbed area. The area will then be <br />reseeded with the approved seed mix for that area. <br />Areas 2 and 3 are in the East Pit, Section 10, within an area that was reclaimed in <br />2007. Mitigation efforts in this area will include repairing a contour ditch with a <br />small dozer, salvaging topsoil within the work area, regarding the rilling area and <br />reapplying the topsoil on the small area that will be disturbed. The area will then be <br />reseeded with the approved seed mix for that area. <br />Areas 4 and 5 are in the East Pit, Section 15, within an area that was reclaimed in <br />2009. A small dozer (D6) will salvage topsoil from the edges of the rill, then regrade <br />the rilling area, and reapply topsoil on the small disturbed area. The area will then be <br />reseeded with the approved seed mix for that area. <br />Area 6 is in the West Pit, Section 4, on the outslope of East Taylor Pond. A backhoe <br />will access the rill, fill it will dirt, and compact the dirt into the rill. The area will <br />then be reseeded with the approved temporary seed mixture. <br />Page 1