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Rule 2: Permits <br />woody production will be collected. Cover sampling can include basal and canopy cover. Basal cover is <br />determined by whatever the vertical hit is closest to the ground plane. <br />LCC proposes to establish a minimum density of 500 shrubs per acre on revegetated oak/pinyon pine <br />communities. This density is proposed to enhance wildlife habitat, but not adversely affect grazing capacity <br />or forage availability for livestock. Shrub seed is included in the seed mixture proposed for the oak/pinyon <br />community type. Shrubs will also be established in the grassland area of the surface mine in shrub plots. A <br />shrub standard of 500 stems per acre will also be applied to shrub plot areas in the disturbed grassland areas. <br />Species proposed for planting correspond to the species which are conspicuous components of -the -pre -mine <br />communities and can be expected to succeed on the post- mining landscape. This standard is not intended to <br />match the pre -mine community nor the historic record, however, it was established to provide a shrub <br />component to the revegetated community which would be consistent with the regional setting, long-term <br />reclamation goals, and reclamation requirements of management agencies. Gambel oak is not proposed for <br />planting because seed is difficult to acquire, seeds are too large for most seeding equipment, and success of <br />this species from seed is low, however, this species may be transplanted. Pinyon pine is not proposed for <br />planting because seed is difficult to acquire and success of this species from seed is low. <br />Species diversity data obtained from the cover data collected from the revegetated areas will be compared <br />to a set standard proposed by LCC. The standard for revegetated grassland and oak/pinyon pine <br />communities would be to have two perennial cool season grasses and one perennial warm season grass <br />comprise from 5 to 30 percent each and one perennial forb of 5 percent of the overall species diversity. <br />The cover requirement for the perennial forb may be met by totaling individual cover values for up to <br />three perennial forb species, if needed. A shrub component will also be included in both reclaimed <br />vegetation types. Table 2.05.4-5 presents a summary of the success standards for reclamation. <br />The Shannon -Weiner Index (HI) will be calculated for these categories of plants from cover data <br />with the following formula: <br />H1= E Pi log Pi <br />Pi=Ni/N <br />Ni = dominance measure for species (species cover) <br />N = The sum of all species dominance measure (total vegetative cover) <br />Thus, P, is equal to relative cover composition. Species diversity will be considered successful when <br />the Shannon -Weiner Index of the revegetated area is equal to or greater than the standard. <br />TR -20 Page 2.05-74 5-4-2018 <br />TABLE 2.05.4-5 LORENCITO CANYON MINE <br />SUMMARY OF STANDARDS FOR BOND RELEASE <br />Sampling Type <br />Phase H <br />Phase III <br />Grassland <br />Cover <br />90% confidence interval of Reference <br />90% confidence interval of Reference Area. <br />Area. <br />Species Diversity <br />Perennial grasses: 2 cool and 1 warm <br />Perennial grasses: 2 cool and 1 warm season 5 <br />season. <br />to 30 percent each. <br />1 perennial forb. <br />1 perennial forb of 5%. May be comprised of <br />up to 3 species. <br />Woody Seem Density <br />No standard for shrub plots. <br />500 stems per acre for shrub plots. <br />Production <br />I No production sampling for this phase. <br />90% confidence interval of Reference Area. <br />TR -20 Page 2.05-74 5-4-2018 <br />