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whether additional measures need to be implemented to enhance revegetation community <br />development. The table below allows the comparison of the parameter values with the <br />standard to be achieved, either from the predictive equations in the case of vegetation <br />cover (v= 0.0173x 0.8592.x 47.015) and herbaceous production <br />0,=0.3749x2.2485. , or the established standard for species composition. <br />Total Vegetation Cover (2012) <br />Predictive Equation Value for 2012: 32.47 % total vegetation cover <br />Based on the results of the 2012 quantitative sampling, Reclamation Areas 23 and 29 met <br />the total cover vegetation final success criterion of 32.47 percent for total vegetation <br />cover, by exceeding 90 percent of the total vegetation cover standard. A Student's t <br />parametric statistical test was undertaken for Reclamation Areas 30 and 31. The test <br />revealed that Reclamation Area 30 total vegetation cover was equal to the revegetation <br />success criterion, thereby meeting the final cover requirement. The statistical test for <br />Reclamation Area 31 revealed that the total vegetation cover in that area did not meet the <br />requirements of the final revegetation success criterion for total vegetation cover. <br />Total Herbaceous Production (2012) <br />Predictive Equation Value for 2012: 84.7 g /m total herbaceous production <br />Total herbaceous production in Reclamation Areas 23, 29, and 30 this growing season <br />exceeded the predicted final revegetation success criterion value for total herbaceous <br />production (84.7 g /m As the sampled total herbaceous production values were greater <br />than the final success criterion, the Reclamation Areas all met the current final <br />revegetation success criterion for total herbaceous production. Total herbaceous <br />production for Reclamation Area 31 exceeded 90 percent of the revegetation success <br />criterion, therefore meeting the current final success criterion for total herbaceous <br />production. <br />Coors Energy Company Keenesburg Mine Page 15 <br />2012 Revegetation Monitoring Report <br />Reclamation Area 23 <br />Total Vegetation <br />Cover <br />Reclamation Area 29 <br />Total Vegetation <br />Cover <br />Reclamation Area 30 <br />Total Vegetation <br />Cover <br />Reclamation Area 31 <br />Total Vegetation <br />Cover <br />X bar <br />32.00 <br />30.60 <br />28.80 <br />25.80 <br />S <br />6.78 <br />8.44 <br />6.41 <br />3.46 <br />N <br />5 <br />10 <br />10 <br />10 <br />Nmin <br />11 <br />15 <br />9 <br />3 <br />whether additional measures need to be implemented to enhance revegetation community <br />development. The table below allows the comparison of the parameter values with the <br />standard to be achieved, either from the predictive equations in the case of vegetation <br />cover (v= 0.0173x 0.8592.x 47.015) and herbaceous production <br />0,=0.3749x2.2485. , or the established standard for species composition. <br />Total Vegetation Cover (2012) <br />Predictive Equation Value for 2012: 32.47 % total vegetation cover <br />Based on the results of the 2012 quantitative sampling, Reclamation Areas 23 and 29 met <br />the total cover vegetation final success criterion of 32.47 percent for total vegetation <br />cover, by exceeding 90 percent of the total vegetation cover standard. A Student's t <br />parametric statistical test was undertaken for Reclamation Areas 30 and 31. The test <br />revealed that Reclamation Area 30 total vegetation cover was equal to the revegetation <br />success criterion, thereby meeting the final cover requirement. The statistical test for <br />Reclamation Area 31 revealed that the total vegetation cover in that area did not meet the <br />requirements of the final revegetation success criterion for total vegetation cover. <br />Total Herbaceous Production (2012) <br />Predictive Equation Value for 2012: 84.7 g /m total herbaceous production <br />Total herbaceous production in Reclamation Areas 23, 29, and 30 this growing season <br />exceeded the predicted final revegetation success criterion value for total herbaceous <br />production (84.7 g /m As the sampled total herbaceous production values were greater <br />than the final success criterion, the Reclamation Areas all met the current final <br />revegetation success criterion for total herbaceous production. Total herbaceous <br />production for Reclamation Area 31 exceeded 90 percent of the revegetation success <br />criterion, therefore meeting the current final success criterion for total herbaceous <br />production. <br />Coors Energy Company Keenesburg Mine Page 15 <br />2012 Revegetation Monitoring Report <br />Reclamation Area 23 <br />Total Herbaceous <br />Production <br />Reclamation Area 29 <br />Total Herbaceous <br />Production <br />Reclamation Area 30 <br />Total Herbaceous <br />Production <br />Reclamation Area 31 <br />Total Herbaceous <br />Production <br />X bar <br />143.0 <br />93.2 <br />124.1 <br />77.5 <br />S <br />32.39 <br />20.63 <br />56.60 <br />29.19 <br />N <br />5 <br />15 <br />15 <br />15 <br />Nmin <br />12 <br />9 <br />38 <br />30 <br />whether additional measures need to be implemented to enhance revegetation community <br />development. The table below allows the comparison of the parameter values with the <br />standard to be achieved, either from the predictive equations in the case of vegetation <br />cover (v= 0.0173x 0.8592.x 47.015) and herbaceous production <br />0,=0.3749x2.2485. , or the established standard for species composition. <br />Total Vegetation Cover (2012) <br />Predictive Equation Value for 2012: 32.47 % total vegetation cover <br />Based on the results of the 2012 quantitative sampling, Reclamation Areas 23 and 29 met <br />the total cover vegetation final success criterion of 32.47 percent for total vegetation <br />cover, by exceeding 90 percent of the total vegetation cover standard. A Student's t <br />parametric statistical test was undertaken for Reclamation Areas 30 and 31. The test <br />revealed that Reclamation Area 30 total vegetation cover was equal to the revegetation <br />success criterion, thereby meeting the final cover requirement. The statistical test for <br />Reclamation Area 31 revealed that the total vegetation cover in that area did not meet the <br />requirements of the final revegetation success criterion for total vegetation cover. <br />Total Herbaceous Production (2012) <br />Predictive Equation Value for 2012: 84.7 g /m total herbaceous production <br />Total herbaceous production in Reclamation Areas 23, 29, and 30 this growing season <br />exceeded the predicted final revegetation success criterion value for total herbaceous <br />production (84.7 g /m As the sampled total herbaceous production values were greater <br />than the final success criterion, the Reclamation Areas all met the current final <br />revegetation success criterion for total herbaceous production. Total herbaceous <br />production for Reclamation Area 31 exceeded 90 percent of the revegetation success <br />criterion, therefore meeting the current final success criterion for total herbaceous <br />production. <br />Coors Energy Company Keenesburg Mine Page 15 <br />2012 Revegetation Monitoring Report <br />