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The vegetation cover success criterion value for 2010 was calculated to be 36.28 % total <br />vegetation cover (based on 14.65" precipitation value). <br />10 Total Vegetation <br />Cover (2010) <br />1998/1999/2000 Rec. Areas <br />Xbar 51.91% <br />S 5.33 <br />N 46 <br />Nmin 2 <br />Total Herbaceous Production <br />The revegetation success criterion for total herbaceous production for the Keenesburg <br />Mine is a predictive equation based on cumulative precipitation amounts during the <br />period from September-July. The predictive equation for total herbaceous production is <br />y=0.3749x2.2485, where x is the cumulative amount of precipitation and y is the total <br />herbaceous production (in g/m'). <br />The total herbaceous production success criterion value for 2009 was calculated to be <br />135.07 g/mz (based on 13.71" precipitation value). <br />0 Total Herbaceous Production (2009) <br />1998/1999/2000 Rec. Areas <br />Xbar 261.13 g/M2 <br />S 56.60 <br />N 61 <br />Nmin 8 <br />The total herbaceous production success criterion value for 2010 was calculated to be <br />156.78 g/m2 (based on 14.65" precipitation value). <br />Total Herbaceous Production (2010) <br />1998/1999/2000 Rec. Areas <br />Xbar 175.20 <br />S 49.63 <br />N 81 <br />Nmin 13 <br />Coors Energy Company Keene5Wrg Mine Page 4 <br />Phase III Bond Release: Areas 2, 5, 6, 7, 9, 10,15, 16,19