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4.2 SPECIES COMPOSITION <br />The species composition standard requires that there be at least four perennial species, of <br />which three are warm season grasses and one a cool season grass. No one component of the <br />above four species should comprise greater than 40% relative importance nor less than 3% <br />relative importance. Relative importance will be measured by calculating relative cover of <br />the revegetation species. Vegetation species which may be used in the calculation of species <br />composition may be any plant species not defined as a noxious or prohibited plant species, <br />and may be native or introduced. <br />The Phase III eligible reclamation areas satisfied the final species composition revegetation <br />criteria. The reclamation areas had six qualifying perennial species; four qualifying warm <br />season graminoids and two qualifying cool season graminoids. The 2011 quantitative <br />sampling for Phase III bond and liability release reveals that the reclamation areas have <br />exceeded the final revegetation success requirements for species composition. <br />5.0 SUMMARY <br />The 2011 quantitative vegetative cover and species composition data indicate that the <br />permittee has established a diverse, effective, and permanent vegetative cover of the same <br />seasonal variety as the original vegetation. The revegetated area is capable of self - <br />regeneration and plant succession. The data shows development of a stable, self - sustaining <br />vegetation community, with seasonality and diversity sufficient to demonstrate successful <br />reestablishment of vegetation on the reclaimed area. <br />Coors Energy Company Keenesburg Mine Page 8 <br />2011 Vegetation Sampling: Phase III Eligible Areas <br />