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Regrading or Stabilizing Rills and Gullies <br />• After an area has been backfilled, graded, topsoiled, and seeded Peabody will monitor the area <br />following spring snowmelt and heavy rains. If observation of the areas indicates that <br />excessive rills and gullies are present or may potentially occur, a closer observation will <br />attempt to determine the cause of the gullying. These areas will be identified on a map. <br />The natural geomorphic processes of the reclaimed area will be given a great deal of <br />consideration, taking into account the slope, aspect, and soil conditions of the site. Further <br />consideration will be given to the normal climatic conditions and rate of vegetation <br />establishment and development in the subject area. Evaluation will include whether the rills <br />and gullies will prohibit successful revegetation or will 'disrupt the achievement of the <br />postmining land use. <br />After dbservation, Peabody Coal Company will have a few options to correct the situation. <br />These options will be a direct result of studying the situation and.selecting the option that, in <br />the opinion of Peabody, will rectify the erosional problem. <br />• ~ One of, or a combination of, the following options and corrective methods will be employed. <br />Improved Channel ~If~it is determined that topography of the regraded area is such that <br />drainage is concentrated into a particular area, then this area will be improved to accept the <br />runoff. The drainage bottom or channel will be reshaped, if needed. ~ This will be done with <br />either a motor grader or dozer, making the channel in the shape of a V that is approximately <br />.16 feet to 20 feet wide. The channel bottom will either be seeded, covered with erosion <br />matting and seeded, or rocked. The method used will depend on site conditions. Continued <br />.observations will be made of this area for problems or necessary maintenance. <br />No Defined Channel On a slope where there is no Swale or defined channel, a number of <br />operations will be performed, depending on the extent ofthe erosion. The area will be disked <br />and crimped or erosion matting will be placed on the area, depending again on site specifics. <br />Reseeding will then take place. <br />• <br />33 <br />