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Overall within the 1999 reclamation areas, Calamovilfa longifolia was dominant, with <br />contributions of 18.00 percent mean and 41.98 percent relative cover. Seven additional <br />species contributed significantly to cover, including; Bromus tectorum with 13.00 percent <br />mean vegetation cover and 18.95% relative cover, Kochia scoparia contributing 5.20 percent <br />mean total cover (7.87% relative cover), Ambrosia psilostachya with 4.00 percent mean <br />cover (7.00% relative cover), Agropyron smithii (western wheatgrass) providing 2.80 percent <br />mean and 4.37 percent relative cover, Andropogon hallii and Helianthus annuus each <br />providing 2.00 and 3.50 percent mean and relative cover, respectively, and Bouteloua gracilis <br />contributing 1.80 percent mean cover and 3.50 percent relative cover. <br />Vegetative litter (prior years growth, dead wood, and other biologic organic material) <br />comprised 29.80 percent ground cover overall within the 1999 reclamation areas. Bare soil <br />comprised 15.80 percent of the ground cover. No rock or cryptogams were encountered <br />during the cover sampling in the 1999 reclamation areas. <br />3.1.3.2 Herbaceous Production <br />Overall mean total herbaceous production within the 1999 reclamation areas was 150.84 <br />g/m2 (1344 lb/ac). <br />3.1.3.3 Species Composition <br />Cover sampling identified three lifeforms and 19 species within the 1999 reclamation azeas. <br />The lifeforms included ten species of perennial graminoids, one annual grass, one perennial <br />forb, one biennial forb, five annual forbs, and one succulent. Of the species encountered on <br />the 1999 reclamation areas, thirteen were native and six were introduced. Perennial species <br />outnumbered annual species by twelve to six, with one biennial species. Cool season species <br />were slightly more prevalent than warm season species (10 cool season to 8 warm season) <br />this yeaz in the 1999 reclamation azeas. Warm season graminoid species accounted for seven <br />species and cool season species included four species. Six forb species were identified as <br />cool season and one was warm season. The succulent was evergreen. <br />The 1999 reclamation areas had eight species contributing greater than three percent relative <br />cover this yeaz. These species included Calamovilfa longifolia with 41.98 percent relative <br />cover, Bromus tectorum with 18.95% relative cover, Kochia scoparia (7.87%), Ambrosia <br />psilostachya (7.00%), Agropyron smithii (4.37%), Andropogon hallii, Helianthus annuus and <br />Bouteloua gracilis (3.50% each). <br />3.1.4 2000 RECLAMATION AREAS <br />The 2000 reclamation azeas sampled this year encompass 7.3 acres of reclamation in two <br />distinct areas within the Keenesburg Mine permit area. The azeas include Area 6, a former <br />haul road along the southeast boundary of the mining area and Area 19, another former haul <br />road in the center of the reclaimed mining azea. Vegetation cover transects and herbaceous <br />production quadrats were distributed within the two areas based on size. The 2000 <br />reclamation azeas range from flat to gently sloping (<1 to 2°). Reseeding or interseeding with <br />the permanent seed mix took place in 2003 within these areas with the goal of increasing <br />Coors Energy Compa-y Keenesburg Mine Page 13 <br />2007 Revegetation Monitoring Report <br />