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RULE 4 PERFORMANCE STANDARDS <br />EXPECTED FIELD IMPLEMENTATION PLAN FOR ASPENITALL SHRUB FIELD TRIALS <br />220 ft. <br />FENCE SURROUNDING ENTIRE AREA <br />220 ft. <br />220 ft. <br />220 ft. <br />REPRESENT <br />4.15.7 Determining Revegetation Success: General Requirements and Standards <br />During the summer of 1980, two reference areas were selected to represent the two major <br />vegetative communities to be disturbed, sagebrush and mountain shrub. The locations of these <br />reference areas are shown on the Vegetation map (Map 4) and Regional Vegetation map (Map 3). <br />An additional reference area was established in 2018, the Collom Aspen reference area, and the <br />location of it is shown on Map 4C Sheet 1. Extensive, detailed vegetative sampling was performed, <br />duplicating the methodologies as described in Section 2.04.10. <br />The reference areas were sampled for herbaceous cover, herbaceous production and woody plant <br />density. Species diversity was determined utilizing herbaceous cover data from the premining <br />inventory of the sagebrush, mountain shrub, and aspen communities. The reference areas are each <br />approximately seven acres in size. <br />Statistical tests were performed on the vegetative data from the reference areas to prove that they <br />were comparable to the premined area. The parameters compared were herbaceous cover and <br />herbaceous production. <br />Sample size adequacy tests were performed on both the premine and reference area data to insure <br />that representative cover and production data had been obtained at the 80% level of confidence. <br />Rule 4 Performance Standards 4-61 Revision, Date: 4/16/19 <br />Revision No.: MR -200 <br />