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Lorencim Canvon Mine - Vegemrian Technics( Reoorr <br />• d = 0.1 (level of precision for estimate of the mean to be within 10% of the <br />actual mean), and <br />x = sample mean. <br />Point-intercept data was used to calculate the following parameters for each community type in <br />potentially affected areas and reference areas: cover (frequency), relative cover, and diversity. <br />The percent total vegetative cover calculation is as follows: <br />% total vegetative cover = # hits on vegetation x 100 <br />Total # of Points <br />The composition of plant species in each azea was also evaluated using the vegetative cover data. <br />The following calculation was used to determine the relative cover of each species per area: <br />% relative cover of species x = % Cover of Species x <br />% Total Veg. cover <br />Species Diversity <br />Species diversity data was gathered from the point-intercept cover data collection. Species <br />• diversity includes the total number of species hit along the transect. A species list of those plants <br />observed during the field investigation was also developed. <br />Shrub and Tree Density <br />In conjunction with the collection of cover data on the disturbed and reference areas, a 5 meter <br />wide belt transect will be established running the entire length of the 50 meter point-intercept <br />cover transect. Smaller or larger transects may be employed within each reclaimed area depending <br />on the area to be sampled and specific sampling parameter goals. Woody plant density will be <br />determined by counting each individual woody stem within the 5 x 50 meter belt transect. Woody <br />plant density values will be presented as woody plant sterns per transect and the extrapolated value <br />of woody plant stems per acre. Plants that are prone to suckering (e.g. Gamble's oak and <br />mountain mahogany) will be sampled by counting each individual woody stem that falls within the <br />belt transect. This method is consistent with the baseline collection of woody plant densities in <br />which individual stems were counted, regardless if multiple stems originated from an individual <br />root crown. <br />• <br />Vcg.475/April 27, 1997 3 (revised 4/21/97) <br />