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1• <br />• <br /> <br />2.2.5 EPO4O <br />EP040 is comprised of 10.3 acres of <br />moderately sloping revegetation that has a <br />predominately northerly aspect. This unit <br />was seeded in 2003 and therefore, has <br />undergone two growing seasons prior to <br />sampling in 2005. A total of 25 plant taxa <br />were observed in the unit (see Table AB-1). <br />Ground cover in EP040 consisted of 44,9% <br />live vegetation, 1.6% rock, 31.9% litter, and <br />bare soil exposure of 21.7%. Perennial cover <br />across the unit averaged 14.7% with annual <br />and biennial cover averaging 30.1%. The <br />dominant taxa were field pennycress, pinnate <br />tansymustard, thickspike wheatgrass, and <br />streambank wheatgrass with 14.9%, 6.9%, <br />4.6%, and 3.1% average cover, respectively. <br />Woody plant density was determined from 15 <br />belt transects. Density (Table 2) totaled 0 <br />young and mature stems per acre. With <br />regard to diversity, EP040 exhibited 4 <br />perennial grasses and 0 perennial fortis with <br />between 3% and 50% relative cover. <br />4 5 6 <br />e <br />. , .. <br />9 le <br />~, ;;~ <br />43. <br />.: <br />_ls :. <br />.. <br />Mao 6-EP040 ,~ --~}~- <br />Vepetaeon Semginy wmt ioutior. xoos ""~":~' <br />zaossamdoroPOm ,.a_...,m~, _._----' <br />sue. t,s, t,: <br />populations are subdued unit-wide. Although <br />cover by the early-sera) species, such as field <br />pennycress, is elevated, ground cover by perennials appears sufFcient to progress to dominance over the <br />next few years. Overall, Unit EP040 exhibits good diversity and perennial cover levels for two-year old <br />revegetation and should be monitored again in 2007 (fourth growing season). <br />Noxious weeds appear to be well <br />controlled in this unit and the annual bromes <br />Kennecott Energy Co. / Colovryo Mine <br />Page 16 <br />Revegetation Monitoring - 2005 <br />