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establish wildlife cover clumps and hiding azea. The practical Head for determining <br />woody plant densities in the undisturbed area is moot. However, if necessary we <br />would propose to take a maximum of fifteen 50 square meter belt transacts to be <br />aligned with the cover transacts. This parameter would not be subject to sample <br />adequacy requirements. <br />Sample Adequacy <br />Sample adequacy calculations will be made for both vegetative cover and herbaceous <br />production sampling of the oakbrush community. The following formula will be used <br />for these calculations: <br />(t)z (s)z <br />nmin = -------------- <br />(d Xbaz)2 <br />where: nm~ =minimum sample size <br />t =the Student's t distribution value at the 95% confidence level <br />s =sample standazd deviation (s)2= sample variance <br />d =percent acceptable deviation from the mean (104'0) <br />Xbar =sample mean <br />Sample adequacy will be calculated for vegetation cover and herbaceous production <br />sampling to a maximum of fifty (50) cover transacts or production plots. If sample <br />adequacy is indicated by less than the maximum number of transacts or quadrats, <br />sampling will be wnsidered adequate for that parameter. Parameters will be tested at <br />the 95% confidence level. Confidence levels achieved for each parameter will be <br />calculated and reported. <br />WETLAND CONII~iUNITY <br />The existing wetland community in the proposed expansion area is hypothesized by Wright <br />Water Engineers to be a remnant oxbow of the North Fork of the Gunnison River which has <br />been completely cut off from the river by construction for the "new" State Highway 133 <br />alignment on the south side of the river. This area has been mapped and described in <br />accordance with U.S. Army Corps of Engineers requirements for delineating jurisdictional <br />wetlands. As this community is small in size (0.3 acres), it qualifies as a minor vegetation <br />community, as defined by CDMG guidelines. We propose to provide a qualitative description <br />of this vegetation community for baseline vegetation requirements. <br />AREA <br />We discussed the need for sampling the oakbrush reference area at the mine to compare to the <br />undisturbed oakbrush in the proposed expansion area. As we both acknowledged, the <br />revegetation on the refuse pile (both the existing LRP and any proposed expansion) would not <br />attempt to establish an oakbrush community. The currently approved seed mix reflects the <br />3 <br />