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va 14 Pts �� S <br />• Achieve a Total Plant Cover of >_ 90% of the Total Plant Cover Standard of 40% (36 %). <br />• Achieve a woody plant density of ? 90% of 1,000 stems per acre (900). V <br />• Achieve annual herbaceous production levels of ? 90% of 450 pounds per acre (405). ✓ <br />yco I <br />• Achieve the same species diversity standards as the West Mine Unit. <br />Success evaluations involve a direct comparison and, where necessary, statistical testing of the <br />ground cover parameter. A total of perennial, biennial and annual (non- noxious) vegetation cover is <br />stated as the approved success standard, however there is a limitation to the amount of annual and <br />biennial cover that can be included in this total. According to guidance provided by CDRMS, annuals and <br />biennials can only contribute 10% relative cover to the comparison. Implementation of this method <br />initially requires noxious weeds to be removed from total cover. Next, annual and biennial absolute <br />cover must be converted into relative cover. Any annual and biennial cover exceeding 10% relative <br />cover must be removed from the total cover data set. The result of this calculation is absolute perennial <br />cover with 10% allowable relative cover of annual and biennial vegetation. The resulting data can then <br />be used in a direct comparison against a standard. <br />In 2013, Cedar Creek was able to make direct comparisons between the Phase II sampling effort <br />and standard (because of statistically adequate sampling), thus a standard statistical t -test was not <br />required. <br />CEDAR CREEK ASSOCIATES, INC. Page 7 Bowie #1 Mine - 2013 <br />Phase II Bond Release Report <br />