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Total herbaceous production at Area 16 was 73.40 g/m2 (6541b/ac). <br />Within Area 16 two lifeforms were represented; grasses and forbs. The total number of <br />species encountered during cover sampling was six. Graminoids accounted for three species, <br />and forbs, three species. Of the species encountered in Area 16, three were native and three <br />were introduced. Annual species outnumbered perennial species four to two, while cool and <br />warm season species were equally represented. <br />3.1.2 1998 RESEEDED OR 1+1VTERSEEDED AREAS <br />The 1998 reseeded or interseeded areas sampled this yeaz encompass 16 acres of reclamation <br />in four distinct azeas within the Keenesburg Mine permit azea. The azeas include Area 2, an <br />area immediately west of the dugout, Areas 7 and 10, two areas south and east of the central <br />reclaimed mining azea, and Area 15, located west of A pit and bordered on the west and south <br />by undisturbed range. Vegetation cover transects and herbaceous production quadrats were <br />distributed within the four areas based on size. The 1998 reseeded or interseeded areas range <br />from flat (Areas 2, 7) to north and south facing (Areas 15 and 10, respectively). Reseeding or <br />interseeding with the permanent seed mix took place during the autumn of 1998 within these <br />areas with the goal of increasing perennial graminoid representation. Specific sampling <br />information for the 1998 reseeded or interseeded azeas is contained in Tables 2 and 7. <br />3.1.2.1 Vegetation Cover <br />Total vegetation cover of the 1998 reseeded or interseeded azeas was 56.40 percent. <br />Graminoids provided 38.40 percent mean cover (69.10% relative cover) and forbs accounted <br />for 17.40 percent mean cover (29.90% relative cover). Succulents and shrubs accounted for <br />0.40 and 0.20 percent total cover (0.66 and 0.33% relative cover, respectively). The lowest <br />total vegetation cover of the parcels sampled was found in Area 10 (42%) and the highest <br />cover (70%) was found in Area 15. Bromus tectorum was encountered in all the reseeded or <br />interseeded azea pazcel transects, Sisymbrium altissimum and Kochia scoparia in 80 percent <br />of the transects, and Calamovilfa longifolia, and Helianthus annuus in 70 percent of all <br />transects. <br />Within the 1998 reseeded or interseeded areas, the cool season introduced annual grass <br />Bromus tectorum accounted for the highest overall cover with 25.00 percent mean cover and <br />41.86 percent relative cover. Seven additional species contributed significantly to vegetation <br />cover (greater than 3% relative cover); the warm season native perennial grass Calamovilfa <br />longifolia with 5.60 percent mean cover and 10.30 percent relative cover, the native warm <br />season annual forb Helianthus annuus contributed 5.60 percent mean cover (9.97% relative <br />cover), Kochia scoparia and Sisymbrium altissimum, both introduced annual forbs, <br />contributed 7.64 percent relative cover (4.40% and 4.60% mean cover respectively), the cool <br />season native grass Stipa viridula (green needlegrass) provided 2.60 percent mean total cover <br />(5.65 percent relative cover), while the warm season native graminoids Bouteloua gracilis <br />(blue grams) and Andropogon hallii both contributed 2.00 percent mean cover (4.98% and <br />4.32% relative, respectively). <br />Coors Energy Comparry Keenesburg Mine Page 11 <br />2007 Revegetation Monitoring Report <br />