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• Reclamation Board for Coal Mining October. 1988), a minimum of ]0 samples were <br />collected in the reference area while at least 15 samples were taken in the reclaimed <br />community. Samples were collected in each area until sample adequacy was reached. <br />Sample locations were selected randomly from within the disturbed and extended <br />reference areas. Because the reclaimed area is composed of several sub-units, samples <br />were placed within each sub-unit in proportion to its acreage (see Table 12). Within <br />each subunit, sample locations were drawn from maps using a 100 x 100 foot grid. In <br />the reference area, sample locations were also drawn randomly from a gridded map <br />(200 x 200 feet grid). In reclaimed areas and where possible in the reference area, <br />these points were located in the field through the use of a compass and pacing. At <br />times in the reference area, this was not possible due to the steepness of the terrain. In <br />such a situation, approximate sample locations were determined using terrain features <br />on the field map, and a random location was found nearby. Cover transects (and <br />• woody plant density quadrats) originated from sample locations. Sample locations are <br />marked on the enclosed maps. The mine site was sampled on July 21, and the <br />reference area was sampled between July 23 and July 25, 1992. <br />Total Vegetative Cover: <br />Total vegetative cover was estimated using an optical point frame developed by <br />ESCO Associates. Point sitings were located along a 50 meter transect stretched out <br />either northwest, northeast, southwest, or southeast of the sample location(the direction <br />was randomly selected from among the four possibilities). The 50 points per transect <br />(one point at each meter interval) comprised a single sample unit. Cover was identified <br />by species, or as rock, litter, or bare ground. For the purposes of estimating total <br /> <br />4 <br />