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• 2.2.2 EP029 <br />F_P029 is comprised of 16.0 acres of gently sloping revegetation that has a predominately <br />northeasterly aspen. This unit was seeded in 1996 and therefore, has undergone seven growing seasons <br />prior to sampling in 2003. A total of 45 plant taxa were observed in the unit (see Table 19). Current <br />annual production across the unit averaged 997 pounds per acre in 2003 with perennial grasses the <br />dominant category (see Table 1). Ground Dover in EP029 (Fgure 2) wnsisted of 49.6% live vegetation, <br />1.1% rock, 1.1% standing dead, 24.3% litter, and bare soil exposure of 24.1%. Perennial cover across <br />the unit averaged 45.4% with annual and biennial cover averaging 4.2%. Dominant taxa were thickspike <br />wheatgrass (Agropyron dasystachyum), intermediate wheatgress, Siberian wheatgrass (Agropyron <br />sibericum), and cicer milkvetch (Astragalus acer) with 12.5%, 12.2%, 5.2%, and 3.7% average cover, <br />respectively. Woody plant density was determined from 20 heft transects. Density (Table 2) totaled 101 <br />young and mature stems per acre with big sagebrush (Artemisia tridentata) the dominant woody plant. <br />With regard to diversity, EP029 exhibited 5 perennial grasses and 1 perennial fort with between 3% and <br />50% relative cover. <br />Unit EP029 currently passes the land release diversity standard of 3 perennial grasses and 1 <br />• perennial fort with between 3% and 50% relative cover. This unit should also readily pass both the. <br />cover and production bond release comparisons to the reference areas. This unit does not presently <br />meet the woody plant standard of 90% of 1000 stems per acre and will probably not meet this in the <br />foreseeable future. See Appendix AA -Section 7.4 for a discussion on options and recommendations with <br />regard to woody plant density. Noxious weeds and annual bromes appear to be under control in this <br />unit, although Canada thistle was still observed. <br />At present, EP029 is another good example of an improved pasture grassland community that would <br />wntribute to the local system as foraging habitat for wildlife (especially elk), as well as provide a variety <br />of management opportunities for livestock grazing, <br />r1 <br />L_J <br />Kennecort rnergy Co. / Cdowyo trine Page 14 Revegetatlon MonROring -2003 <br />