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• <br />• <br />• <br />Regrading or Stabilizing Rills and Gullies - All Areas <br />After an area has been backfilled, graded, and topsoiled, Peabody Coal Company will <br />monitor the area following any heavy spring snow melt or heavy rains. If, upon <br />observation, excessive rills and gullies do occur or there is an indication they may occur <br />in areas that have been reclaimed, closer observation of the area will begin to determine, <br />if possible, the cause of the gullying. The natural geomorphic processes of the reclaimed <br />area will be given a great deal of consideration; taking into account the slope and <br />climatic conditions of the site. <br />Monitoring for rills and gullies will be carried out on a periodic basis; the monitoring <br />being geared to those periods after spring snowmelt and following any significant storm <br />events which may occur in the vicinity of the mine site. The results of any rill and <br />gully monitoring will be documented in the administrative files located on site at the <br />Nucla Mine office. Also contained in the files will be a map showing the location of <br />those areas requiring repair. When the occurrence of excessive rills and gullies <br />necessitates implementation of the following rill and gully plan, the Division will be <br />notified prior to any corrective action being taken. <br />After observation, 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 <br />that, in the opinion of Peabody Coal Company, will rectify the erosional problem. <br />One of, or a combination of, the following options and corrective methods will be <br />employed: <br />Improved Channel. If it is determined that the topography of the regraded area is such <br />that drainage is concentrated in a particular area, then this area will be improved to <br />accept the runoff. The drainage bottom or channel will be reshaped if needed. This will <br />be done with either a motor grader or dozer, making the channel in the shape of a V that <br />is approximately 16 ft. to 20 ft. wide. The channel bottom will either be seeded, covered <br />with erosion matting and seeded, or rocked. The method used will of course depend on site <br />conditions. Continued observations will be made of this area for problems or necessary <br />maintenance. <br />No Defined Channel. On slopes where no swale or defined channel exists, a number of <br />22-35 Revised 07/25/91 <br />