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_ USDA - SCS Recommendations for Species to be <br />• Used for Permanently Revegetating Rangelands <br />As described in Section 2.3, three range sites occur on the proposed permit area, <br />i.e. the mountain shrub high and low elevation sites (range sites A and B) and <br />the sage-grass site (range site C). The mountain shrub sites generally occur on <br />the upper slopes of the west portion and on most of the east portion of the pro- <br />posed permit area. The sage-grass type is the most common type in the west por- <br />tion, giving way to mountain shrub as one progresses east or towards the crest of <br />the Williams Fork Mountains (refer to Map M16). This same distribution of types <br />will be approximately reiterated by Trapper Mine's revegetation plan. <br />The USDA Soil Conservation Service (1977) has described the climatic zones of <br />Moffat County for purposes of selecting plant species for improving and reclaim- <br />ing rangelands. Figure 3.6-5 shows the climatic zones described and the relative <br />location of the proposed mine plan area. Three separate climatic zones occur <br />across the area (Zones III, VII and VIII). Some error occurs in the map because <br />of the scale but Zone VII roughly corresponds with the sage-grass range site, <br />• Zone III represents the low elevation mountain shrub site while Zone VIII is an <br />approximation of the high elevation mountain shrub site. The USDA recommended <br />plant species for seeding rangelands in these climatic zones are provided in <br />Tables 3.6-4 through 3.6-6. <br />General Seeding and Transplanting Criteria <br />The rate of seeding retopsoiled, graded spoils is dependent upon the method, i.e. <br />drilling versus broadcasting. If seeding is to be done by broadcasting, the rate <br />of application will be increased by fifty percent. The following portions of <br />this section provide tables listing the preferred seed mix and rates. <br />Section 4.4 discusses the shrub reestablishment standard which will be achieved <br />at Trapper Mine. Shrub reestablishment is based upon selection and seeding or <br />planting to enhance the primary post mining land use or uses. For example, range <br />site C (big sagebrush-grass type) will be returned to a primary land use of <br />10 <br />3-117 <br />REVISED JUL 2 ,; <br />Q?