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Peabody Sage Creek Mine March 2011 <br />SL-1 Phase 11 Bond Release Request <br />0 <br />I* <br />Table 1, Vegetation Cover Sampling Summary, provides a summary of the cover attributes <br />for the Phase Il bond release block and the mountain brush and sagebrush native types in the <br />reference area. Table 1 also provides the allowable first hit herbaceous cover values (initial <br />value for mountain brush) used in the success evaluations for cover. The basis and <br />calculation of the allowable first hit herbaceous cover is presented beginning on page 10 of <br />the revegetation success evaluation report by ESCO Associates and Appendix 6 of the same <br />report included in Attachment E - Revegetation Supporting Documentation. <br />Table 1. Vegetation Cover Sampling Summary, Phase II Bond Release Block and <br />Reference Area (RA), PSCM. <br /> Total Total First Hit <br /> First Hit Allowable <br />Area Standing <br /> Cover Herbaceous Cover Litter Bare Soil <br /> Dead (%) Rock (%) <br /> <br />Phase U Bond <br /> 39.6 37.5 0.57 35.47 6.1 18.2 <br />release Block <br />Mountain <br /> 71.5 12.4' 0.73 21.53 - 6.2 <br />Brush RA <br />Sagebrush RA 71.1 44.7 2.27 19.40 - 7.27 <br />' Final ratio-adjusted cover value used in weight averaged standard is 12.4. See'below. <br />Sample adequacy using first hit cover was met for the Phase II bond release block and the two <br />reference areas. When sample adequacy was calculated using allowable first hit cover, it was <br />met for the Phase II bond release blocks and the sagebrush reference but not the mountain <br />brush reference area. The sampling results and statistics for total first hit cover and allowable <br />first hit herbaceous cover are summarized below in Table 2, Sample Adequacy Summary for <br />Total First Hit Cover, and Table 3, Sample Adequacy Summary for Allowable First Hit <br />• Herbaceous Cover. <br />7