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Species Composition <br />•' The species composition success criterion requires that there be at least four perennial <br />species, of which three are warm season grasses and one a cool season grass. No one <br />component of the above four species should comprise greater than 40% relative <br />importance nor less than 3% relative importance. Relative importance will be measured <br />by calculating relative cover of the revegetation species. Vegetation species which may <br />be used in the calculation of species composition may be any plant species not defined as <br />a noxious or prohibited plant species, and may be native or introduced. <br />Species Composition (2007) <br />Success 1985/1986/1987 Rec. Areas 1995/1997 Rec. Areas <br />Standard <br />Total Perennial 4 7 8 <br />Species* <br />Warm Season 3 3 4 <br />Grasses* <br />Cool Season 1 3 3 <br />Grasses* <br />Relative Importance All Species All Species All Species <br />(3%<x<40%) <br />Species Composition (2008) <br />• Success 1985/1986/1987 Rec. Areas 1995/1997 Rec. Areas <br />Standard <br />Total Perennial 4 7 7 <br />Species* <br />Warm Season 3 4 4 <br />Grasses* <br />Cool Season 1 2 2 <br />Grasses* <br />Relative Importance All Species All Species All Species <br />(3%<x<40%) <br />* Numbers reflect only those species meeting the relative importance percentage limitation <br />From the summary information above, the 1985, 1986, and 1987 reclamation areas and <br />the 1995 and 1997 reclamation areas exceeded the final revegetation success criteria <br />values for total vegetation cover, total herbaceous production, and species composition in <br />2007 and 2008, thereby demonstrating that the permittee has established a diverse, <br />effective, and permanent vegetative cover of the same seasonal variety as the original <br />vegetation. The revegetated area is capable of self-regeneration and plant succession. <br />The data shows development of a stable, self-sustaining vegetation community, with <br />seasonality and diversity sufficient to demonstrate successful reestablishment of <br />• vegetation on the reclaimed area. <br />Coors Energy Company Keenesburg Mine Page 5 <br />Phase III Bond Release: 1985/1986/1987/1995/1997 Areas