Laserfiche WebLink
Total Herbaceous Production (2009) <br />The predictive equation value for total herbaceous production for 2009 (based on 13.71 <br />precipitation value): 135.07 g/m2 <br />Parameter Value 1998/1999/2000 Rec. Areas <br />Xbar 261.13 <br />S 56.60 <br />N 61 <br />Nmin 8 <br />With regard to total herbaceous production, the 1998, 1999, and 2000 reclamation areas <br />exceeded the predicted value for total herbaceous production, thereby meeting the final <br />revegetation success criterion. <br />Species Composition (2009) <br />• <br />• <br />Success 1998/1999/2000 Qualifying Species <br />Standard Rec. Areas <br />Total Perennial <br />Species* <br />(>3% rel. cover) <br />Warm Season <br />Grasses* <br />Cool Season <br />Grasses* <br />Relative Importance <br />(3%<x<40%) <br />Andropogon hallii, Bouteloua gracilis, <br />4 6 Calamovi fa longifolia, Panicum virgatum, <br />Agropyron smithii, Ambrosia psilostachya <br />3 4 Andropogon hallii, Bouteloua gracilis, <br />Calamovilfa longifolia, Panicum virgatum <br />1 1 Agropyron smithii <br />All Species All Species All Species <br />* Numbers reflect only those species meeting the relative importance percentage limitation <br />The 1998, 1999, and 2000 reclamation areas satisfied the final species composition <br />revegetation criteria. <br />4.0 DISCUSSION AND CONCLUSIONS <br />Vegetation cover, herbaceous productivity, and species composition within the 1998, 1999, <br />and 2000 reclamation areas were monitored from 1998 to 2007. <br />The 1998 Reclamation Areas (Areas 2, 7, 10, 15, and 16) were released from Phase I liability <br />requirements with approval of Surety Release 1 by CDRMS on August 11, 1998. <br />Areas 5 and 9 (1999 Reclamation Areas), and Areas 6 and 19 (2000 Reclamation Areas) were <br />released from Phase I liability by CDRMS with approval of Surety Release 2, on October 18, <br />2005. <br />Coors Energy Company Keenesburg Mine <br />Areas 2, 5, 6, 7, 9, 10, 15, 16, and 19 Vegetation Study (2009) <br />Page 11