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1 <br />1 <br />Vegcranon Sampling for /996 <br />' Table 1 <br />Colorado Coal Mine No. 1 <br />Summary of Sample Adequacy Calculations <br />' Mean Vegetation Computed <br />Cover Standard Actual Sample Adequate <br />Area (percent) Deviation Size Sample Size <br />' Reclaimed Area 13.1 1.29 10 2.6 `/. / ~ <br />Reference Area 14.6 1.86 11 4.3 3 •U <br />Using aCover-Point Optical Point Projection Device (Model 2), each point sample was <br />determined by projecting the ocular sight vertically downward to the sample location on the <br />' transect and recording all "hits" on vegetation. The "hiu" were used to determine total vegetative <br />cover for each transect according to equation 2. <br />' (2) <br />Tota[ Veg. Cover No. Hits on Vegetation x 100 <br />Total No. of Points <br />' Mean vegetative cover for each area was the mean value for the ten transects. <br />The composition of plant species in each area was also evaluated using the data acquired from the <br />' vegetative cover transects. Data from the transects were used in equation 3 to determine the <br />relative cover of each species detected: <br />' (3) % Cover of Species X <br />Relative Cover of Species X = <br />t % Total Veg. Cover <br />' Percent total vegetative cover for each area was the mean of the ten transects. <br />RESULTS <br />1 The survey showed that 13.1 percent of the disturbed area was covered by vegetation (Table 2). <br />Baze ground accounted for 45.0 percent of the surface area, while litter and rock comprised 41.8 <br />' percent and 0.1 percent, respectively. Relative to vegetative cover on the disturbed area, <br />perennial grasses accounted for 89.2 percent and perennial and biennial forbs comprised <br />' S.5 percent of the total estimated vegetative cover (Table 2). Shrubs and annual grasses and forbs <br />accounted for 5.4 percent of the vegetative cover. <br />' d~tl.OJPDJJ.1996~5ry~m~EC~ U. 199b • '~ <br />