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Section 816.105 (b) Continued. • and suitable waste materials; and (6) Meet the revegetation requirements of Sections 816.111-816.117 for all disturbed areas. Energy Fuels will not be mining in any area which comes under the definition of thick overburden as discussed in Section 816.105 (a). However, as demonstrated in Section 780.35, the most suitable postmining contour and elevations are achieved by backfilling the final pit with previous spoil ridges and leaving boxcut material in permanent excess spoil piles as designed in Sections 816.72-816.73. Section 816.106 Regrading or stabilizing rills and gullies. 41hen rills or gullies deeper than 9 inches form in areas that have been regraded and topsoiled, the rills and gullies shall be filled, graded, or • otherwise stabilized and the area reseeded or replanted according to Sections 816.111-816.117. The regulatory authority shall specify that rills or gullies of lesser size be stabilized and the area reseeded or replanted if the rills or gullies are disruptive to the approved post-raining land use or may result in additional erosion and sedimentation. Implementation of the soil stabilization practices outlined under Section 816.114 will minimize potential erosion hazards. The detention capacity of the contour furrows are designed to prevent overland flow. Studies in the northern Great Plains, as reported by Dollhopf, et al. (1977) using similar surface manipulation techniques dramatically demonstrate the detention capacity of contour furrows. Techniques used for the repair and stabilization of gullies requiring remedial measures include the use of barriers, check dams, erosion stops, matting and roughened surfaces. In some cases, existing rills and gullies will be monitored and not immediately repaired. Exhibit • 28, Rill and Gully plan, further explains the repair and monitoring of 816-136 Revised 10/29/87