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Woody Plant Density Area Data <br />Prior to 2011 woody plant density sampling, blocks with historically low woody plant densities <br />were removed from the sampling universe (Blocks A, AA, C, C2, D, F, N and 0). Block I was <br />removed after 2006 sampling due to lack of woody plants. Of the remaining 21 blocks that were <br />sampled in 2011 (Blocks B, BB, E, G, H, J, K, L, M, P, Q, Q2, R, S, T, U, V, W, X, Y and Z), <br />average woody plant density values ranged from 61 stems per acre (Block Y) to 7,681 stems per <br />acre (Block E). On average the woody plant density values were above 90% of the current woody <br />plant density standard (1,800 stems per acre). The Woody Plant Density areas at the Seneca IIW <br />mine sampled in 2011 total —58 acres. <br />Thirteen of the woody plant density area blocks surpassed the standard of 1800 stems per acre <br />and account for —64 percent ( -37 acres) of all Woody Plant Density areas. Four of the woody <br />plant density area blocks are well on their way to meeting the standard - surpassing 1000 stems <br />per acre and accounting for —19 percent ( -11 acres) of all Woody Plant Density areas. However, <br />the remaining 4 blocks averaged —500 stems per acre and accounted for —17 percent ( -10 <br />acres). <br />Between 2010 and 2011, Woody Plant Density per block averaged a 59 percent increase versus <br />an average increase in Woody Plant Density of 77 percent 2008 to 2010. These increases were <br />mostly in the form of big sagebrush (Seriphidium tridentatum) and mountain snowberry <br />(Symphoricarpos rotundifolius). <br />5 <br />