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• 1) Pre-permanent program reclamation was accomplished using run-of- <br />mine spoil, which is also considered the best available substitute <br />soil reconstruction material under Permit No. C-80-001 (the <br />redisturbed Moffat prelaw area will be reconstructed using <br />salvaged soil materials rather than substitute soil reconstruction <br />material); <br />2) This data accurately represents the ground cover existing prior to <br />redisturbance; and <br />3) The ground cover existing at the time of redisturbance was <br />apparently adequate to control erosion. <br />The ground cover value contained in the "Actual Cover" column (AC) in <br />Table 2.9-45 (baseline studies) is 97 percent. This ground cover <br />percentage has been approved as being an acceptable standard for phase III <br />revegetation bond release. At such time that phase III release is <br />requested for previously disturbed areas, an evaluation of the erosion <br />condition class then existing will be performed using the method outlined <br />• in the Bureau of Land Management's Technical Note #346 (see 9.3.6.2 and <br />Appendix 4.3-B). <br />Even though a diversity standard is not required under Rule 9.15.10, <br />P&M intends to reclaim previously disturbed areas with a species diverse <br />seed mixture. The voluntary goal established by P6M for the reclaimed <br />plant community in terms of percentage of plants in the habits of grasses, <br />forbs and trees/shrubs is 90, 5, and 5, respectively. This goal is based <br />on monitoring of the West Ridge area which determined that three grass <br />species made up approximately 92 percent of the diversity on West Ridge. <br />These species included Bromus inermis Leyss. (79.18), Aqropyron intermedium <br />(Host..) Beauv. (7.08), and Aqropyron desertorum (Fisch.) Schult. (5.68) <br />(from Table 2.9-95). Therefore, the goal of the revegetation program on <br />West Ridge is to reduce the contribution of the grass species to <br />approximately 90 percent or less. Even though the grass habit is being <br />reduced, the grass community will be diversified to include five to 15 <br />native species as major contributing components. <br />It is anticipated that shrub contribution to diversity percentages <br />will increase from 1.1 percent to 5.0 percent (500 stems per acre based on <br />97 percent total cover), and that forb percentages will increase from 3.2 <br />• percent to 5.0 percent. The goal to increase forb and shrub components <br />appears to be realistic, since the substitute soil reconstruction materials <br />Renewal-3 4.4-5 June 13, 1997 <br />