Laserfiche WebLink
<br />Table 4. In order to meet the requirements of 4.15.10 (1) it is necessary for <br />reclaimed lands on West Ridge to have a 47 percent vegetational cover at the <br />time of bond release. The 47 percent cover figure is arrived at in the Acftlal <br />Cover column (AC) in Table 4. There are no significant erosional problems in <br />the 1Vest Ridge area at this time, so this percentage of cover should be ade- <br />quate to control erosion in this area as required by the regulations. <br />For determining the percent contribution to diversity of each species, <br />the procedure developed by Larson (1980) was used. These calculations are <br />given in Table 4. Since West Ridge vegetation represents a homogeneous man- <br />made plant community, it wasn't necessary to weight the Pi values with vege- <br />tation commnunity acreages. <br />Three grass species made up approximately 92 percent of the diversity on <br />• <br />West Ridge. These included Bromus inermis Leyss.(79.10), Agropyron intermedium <br />(Host.) Beauv. (7.Oa), and Agropyron desertorum (Tisch.) Schult. (5.8%). It <br />will be the goal of the revegetation program on West Ridge to reduce, if pos- <br />Bible, the contribution of the grass species to approximately 90 percent. In <br />doing this, the grass community will be diversified to include 5 to 15 species <br />as major contributing components. It is anticipated that shrub contribution <br />to diversity percentages will increase from 1.1 percent to 5.0 percent (500 <br />stems per acre based on 47 percent total cover), and that forb percentages will <br />increase from 3.2 percent to 5.0 percent. <br />It should be emphasized that the above diversity goal of S/5/90 (Shrubs/ <br />• <br />Forbs/Grasses) isn't required by lain, but is a voluntary action on the part of <br />PF,A1 to improve the post-mining vegetation community on disturbed lands in the <br />14est Ridge area. -., . <br />I <br />