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<br />'1 <br />} <br />• • <br />This mix was developed in an effort to provide the genetic <br />plant material which over time will produce a similar vegetative <br />structure as identified in premining vegetation studies (Appendix <br />F). <br />When the permit was renewed the seed mix was revised as <br />follows: <br />CANADIAN STRIP MINE <br />SEED MIX <br />Rate in PLS <br />Seed mix is as follows: lbs/acre <br />Thickspike wheatgrass, Critana 3.00 <br />Western wheatgrass, Arriba 6.00 <br />Green needlegrass 0.50 <br />Slender wheatgrass 6.00 <br />Beardless wheatgrass, Whitman 3.00 <br />Pubescent wheatgrass, Luna 2.00 <br />Big bluegrass, Sherman 2.00 <br />Canadian bluegrass, Ruebens 2.00 <br />Rocky Mountain Penstomen 0.25 <br />Lewis flax 0.25 <br />Yarrow 0.25 <br />Cicer milk vetch, Lutana 1.00 <br />Mountain big sagebrush 0.25 <br />Rubber rabbitbrush 0.25 <br />Winterfat 2.00 <br />28.75 <br />This mix was used on the 1987 reclaimed area and is the presently <br />approved permanent seed mix. <br />Premining diversity estimates (Figure 4F, Appendix F) <br />illustrates that 6 species contributed 76 percent of the total <br />diversity. <br />-63- (Revised April 13, 1990) <br />