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3. The Division proposes to approve of the location of the disposal azea (4.09.1(6)). <br />4. The underdrain system will be constmcted simultaneously with excess spoil placement <br />by the natural segregation of dumped materials. The resulting underdrain system will <br />be capable of carrying anticipated seepage from rainfall aw well as springs and seeps <br />within the foundation of the disposal azea away from the fill. Other requirements for <br />drainage control will be met. <br />V. Backfillin¢ and Grading <br />A. The applicant has demonstrated [hat the fill used to eliminate [he highwall and <br />depressions meets all the requirements of 4.05, 4.06, 4.09 and 4.15. Therefore, the <br />Division proposes to approve that excess material not required for highwall and other <br />depression backfill need not be returned to approximate original contour (4.14.1(2)(c)). <br />The Division proposes to approve the method and design specifications for covering of <br />acid-and toxic-forming materials in order to prevent leaching into surface and ground <br />water and to insure backfill stability (4.14.3(2)). <br />VI. Reveaetation <br />The permit area includes three defined vegetation types including a pinon-juniper/mountain <br />shrubs mosaic, a dry cropland area and a previously disturbed "old field" community. <br />Baseline data collection has been performed on all three areas, and is included in Section <br />2.04.10 of the permit application. <br />The reclamation plan with respect to revegetation is discussed in Section 2.05.4(2)(e)(i) of <br />the permit application. The Division has approved the use of introduced species and finds <br />that they will be compatible with the post-mining land use. Straw mulch will be utilized after <br />seeding to control erosion prior to vegetation establishment. On steeper slopes, fabric netting <br />will also be used in conjunction with [he straw mulch. <br />Methods to measure herbaceous cover, production and woody plant density are discussed in <br />Section 2.05.4(2)(e)(i), (ii) and (iii). These include the point-intercept method utilizing a <br />stationary point frame with a vertical projection optical device for recording hits or misses on <br />cover sampling, clipping one-meter diameter plots by lifeform for production and belt <br />transects for woody plant density. <br />Successful establishment of the vegetation will be based on a reference azea comparison for <br />[he pinon-juniper and old field community and historical crop yield comparison for the <br />cropland area. <br />Success will be judged adequate based on the following comparisons: <br />zo <br />