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2016 <br /> Calculation of the cover performance standard for 2016 sampling data is demonstrated below. <br /> Aspen Reference Area Allowable All-Hit Herbaceous Cover' = 74.6% <br /> Mountain Brush Reference Area Allowable All-Hit Herbaceous Cover' =44.9% <br /> Sagebrush Reference Area Allowable All-Hit Herbaceous Cover' = 36.4% <br /> Steep Mountain Brush Reference Area Allowable All-Hit Herbaceous Cover' =28.2% <br /> 'Herbaceous cover adjusted to allowable by subtracting noxious weeds and annual/biennial <br /> plant cover in excess of 10%of the remainder. <br /> The calculation of 90 percent of the 2018 Cover Standard= <br /> 0.90* [0.244(74.6%) +0.489(44.9%) +0.24(36.4%) +0.027(28.2%)] =44.7 <br /> The mean allowable all-hit herbaceous vegetation cover sampled in 2016 BRB-2 was 71.3%, <br /> exceeding 44.7%,which is 90% of the upwardly adjusted cover performance standard. (see Table <br /> C-1 in Attachment D).This direct comparison of reclaimed area mean to standard is allowed under <br /> DRMS rules (CDMG 2005 revised rule, 4.15.11 (2)(a)) when sample adequacy has been <br /> demonstrated for the reclaimed area. Thus for 2016, successful revegetation for allowable all-hit <br /> herbaceous cover is indicated. <br /> Successful revegetation for the parameter of cover was demonstrated in both 2015 and 2016. <br /> PRODUCTION <br /> The Yoast herbaceous production standard and success evaluation is based on reference area <br /> sampling to derive a weight averaged value (based on the four primary pre-mine vegetation type <br /> contributions to total acreage). The current 2015 and 2016 annual herbaceous production was <br /> determined from sampling in the approved four vegetation types in the extended reference area. <br /> The weighting contribution for each type is as described above under the Cover discussion. Based <br /> on the production sampling an allowable herbaceous production value is determined by excluding <br /> noxious weeds and allowing no more than 10%relative production of annual/biennial weeds. The <br /> allowable herbaceous production values for the four vegetation types in the reference area are used <br /> in the weight averaged calculations to determine the production standard. <br /> SL-7 - 12 <br />