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• 1986 RECLAMATION AREA <br />The 198b Reclamation Area encompasses approximately 47 acres of reclaimed pit in <br />the central area of the Keenesburg Mine permit area. The 1986 Reclamation Area is <br />composed of three parcels (west, central, and east) separated by north-south haul road <br />corridors. This area is nearly flat with a gentle slope (< 1 °) to the north and east. <br />Reclamation and coincident revegetation within this area took place in 1986. Replaced <br />soils were generally sandy in texture. Specific sampling information for the 1986 <br />Reclamation Area is contained in Table 4. <br />Vegetation Cover <br />Total vegetation cover of the 1986 Reclamation Area was 37.47 percent. Based on <br />cover sampling, graminoids represented 29.45 percent mean cover (86.43% relative <br />cover), forbs accounted for 4.13 percent mean cover (13.27% relative cover), and <br />shrubs/subshrubs accounted for 0.13 percent mean cover (0.29% relative cover). <br />The dominant plant species was Calamovi/fa longifolia with 13.53 percent mean cover <br />and 40.71 percent relative cover. There was one sub-dominant grass species: <br />Andropogon hallii with 5.65 percent mean cover and 16.81 percent relative cover. <br />Additional significant species included Bromus marginatus with 3.41 percent mean <br />• cover and 9.14 percent relative cover, Bouteloua gracilis with 2.47 percent mean cover <br />(7.6740 relative cover), Sporobolus airoides with 1.88 percent mean cover (6.19% <br />relative cover), Helianfhus annuus with 1.87 percent mean cover and 6.19 percent <br />relative cover, and Erigeron bel/idiastrum (daisy) with 1.07 percent mean cover <br />(3.83% relative cover). <br />Vegetative litter (prior years growth, dead wood, and other biologic organic material) <br />comprised 52.40 percent ground cover within the 1986 Reclamation Area. Baze soil <br />comprised 10.13 percent of the ground cover encountered in the 1986 Reclamation <br />Area. No rock was encountered in the cover sampling of this area. <br />Species Diversity <br />Within the 1986 Reclamation Area three lifeforms were represented; graminoids, forbs, <br />and shrubs. The lifeforms included nine species of perennial grasses, three perennial <br />forbs, four annual forbs, and one deciduous shrub. Of the species encountered on the <br />1986 Reclamation Area, 15 were native and two were introduced. Perennial species <br />outnumbered annual species by 13 to four. Seasonality of 1986 Reclamation Area <br />species was split between cool season and warm season species. Four graminoids were <br />cool season species and five were warm season species. Five of the forb species were <br />identified as cool season and two were warm season. The shrub was deciduous in <br />habit. <br /> <br />-8- <br />