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The II-W cover standard and evaluation for success is as follows. The cover success standard is based on <br /> a weighted average value(based on the relative extent of primary premine vegetation type contributions to <br /> total acreage) for allowable all-hit herbaceous cover derived from sampling in the approved northern <br /> extended reference area. The rounded weighting contribution by type is aspen 11%, mountain brush 35%, <br /> sagebrush 31%, steep mountain brush 13% and western wheatgrass/alkali sagebrush 10%. Allowable <br /> all-hit herbaceous cover is determined from cover sampling in the Phase III reclaimed lands and the native <br /> reference area with subtractions made for woody plants, noxious weeds and cover of annual/biennial <br /> weeds in excess of 10% relative cover. The Phase III bond release area sample value will be no less <br /> than 90%of the cover success standard at 90%statistical confidence. In the following discussion and the <br /> bond release vegetation report attached, cover for the reference area derived standard and the Phase III <br /> reclaimed area may be variously referred to as allowable all-hit herbaceous cover or as allowable <br /> herbaceous cover. The derivation of the allowable all-hit herbaceous cover for the Phase III bond release <br /> block and the reference area types is included in the discussion and data tables in the 201 /2012 a <br /> 2015/2016 revegetation success evaluation report included in Attachment D — Revegetation Success <br /> Supporting Documentation. Table 1 provide a summary of the sample cover attributes for the Phase III <br /> bond release blocks and the five native types in the extended reference areas for years 201 /2012 (BR43 <br /> 2018/2019 (BRB-5), and the calculated allowable first hit herbaceous cover values for these <br /> communities. <br /> BRB-5 2018-2019 Revegetation Success Sampling <br /> Cover <br /> Table 1 provides a summary of the sample cover attributes for the Phase III bond release block and the five <br /> native types in the extended reference areas for years 2018 and 2019. Table 1 also includes the calculated <br /> allowable first hit herbaceous cover values for these communities. <br /> Table 1. 2018 and 2019 Vegetation Cover Sampling Data Summary for the II-W BRB-5 Phase III <br /> Bond Release and Reference Areas (RA). <br /> Allowable <br /> Total First Standing <br /> All-hit Litter Rock Bare <br /> Area Hit Cover Dead <br /> Herbaceous (%) (%) Soil (%) <br /> Cover (%) <br /> BRB-5 Phase III <br /> Bond Release 64.9 55.5 1.8 30.0 0.5 8.7 <br /> Area 2018 <br /> Ai RA 2018 155.2 69.0 1.2 11.2 0.1 1.7 <br /> MB i RA 2018 117.2 41.7 2.0 18.6 0.0 3.1 <br /> 5 <br />