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• <br />• <br />• <br />operations will be performed, depending on the extent of the erosion. The area will be <br />disked and retopsoiled if needed. The site will then be mulched and crimped or erosion <br />matting will be placed on the area (Nucla Mine area and dryland pasture Nucla East area), <br />depending again on site specifics. Reseeding will then take place. Reseeding and <br />irrigation will be the only measures in the Nucla East irrigated pasture areas. <br />In addition to the above, contour furrows in and above the erosion area may be constructed <br />to trap and slow down the runoff. Straw dikes will also be used where appropriate to <br />control runoff and promote revegetation. <br />Other Methods. If corrective measures described under No Defined Channel fail, Peabody <br />Coal Company proposes to observe and reevaluate the situation. A combination of the first <br />two methods described or some variation therein will be applied. Methods such as, but not <br />limited to rock channels, contour furrows or laterals with rock or matting bottoms, V <br />ditches made with the dozer or motor grader, and methods described above to reestablish <br />vegetation. <br />Head Cutting Stabilization. Head cutting will be controlled by a number of methods. If <br />the area is at a point that concentrates runoff, the area will be improved to accept this <br />runoff. This would include reshaping the channel and channel bottom, covering with <br />erosion matting, seeding, or rocking. <br />In other areas, depending on the extent of erosion and time of year, the area will be <br />disked, mulched and seeded as needed. Straw bales, erosion matting, or rock fill may also <br />be used to stabilize the area. <br />Weed and Pest Control Plan - All Areas <br />A number of noxious weeds occur in the region surrounding the Nucla Mine and Nucla East <br />area. Specifically, the following noxious weeds (as listed in Section V, CMLRD Guideline <br />for the Management of Noxious Weeds on Coal Mine Permit Areas) were identified on the mine <br />permit area during various baseline and monitoring studies: <br />Canada thistle Sow thistle <br />Field bindweed Spotted knapweed <br />White top <br />22 -36 Revised 07/25/91 <br />