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<br />;'1 <br />On Map R-1 is shown a dividing line between the Upper Zone and Lower Zone of the <br />operation. This line delineates the approximate boundary between land that will require some <br />earthwork and land where little or no earthwork is required. The Lower Zone is the area where <br />most of the grading and earthwork will need to be done. The Upper Zone is being heavily <br />invaded by many native species and should be treated with considerable care during the <br />revegetation process. The diversity of vegetation present in this area is of tremendous value <br />and the invasion process should not be disrupted. Achieving this kind of diversity in the <br />revegetation process, assuming no invasion occurred, would be extremely difficult, if not <br />impossible. This will be discussed in more detail later. <br />All lands marked with the letters "NV" should be left undisturbed. These areas are <br />essentially natural vegetation. Although most exist around the perimeter, there are many <br />islands of natural vegetation scattered throughout the Upper Zone of the site. These should not <br />be disturbed as they provide a seed source to allow even more rapid recovery of the natural <br />vegetation of the site. <br />Locations Rg-1 and Rg-2, just above the entrance to the operation, provide an excellent <br />baseline for determining what can be done on many portions of the Lower Zone. Although <br />these areas are heavily dominated by the very competitive species Bromur irtermis (Smooth <br />Brome), the value of this species in controlling erosion on steep slopes is evident. Area Rg-1 is <br />one of the steepest slopes on the site and yet vegetation cover is at least 80% and approaches <br />100% on some small areas. Erosion is minimal on this slope. Other sites dominated by Smooth <br />Brome show similar patterns. <br />SITE VEGETATION: Following is a list of the species found during the two <br />inspections of the site. There are probably more. The survey was done'in May and early June <br />and therefore species that are not readily evident until mid to late summer are not included. If <br />a complete species list was prepared for the site, it probably would total at least 60 <br />angiosperms and gymnosperms and probably closer to 75 or 80. If cryptogams (mosses, etc.) <br />were included the list would probably total 90 to 100 species. Of these, it is estimated that <br />only about 5 or 6 were planted; the rest invaded, and some invaded in large numbers. <br />Weed species (noted in the list) are present and are problematic in some areas, <br />especially Bromtu tecJOrum (Cheatgrass). Yet, in general, the site does not exhibit a high <br />degree of weed infestation and with proper revegetation practices most of the weed problem <br />can be eliminated. It is unlikely that complete eradication of the weeds, especially the <br />Cheatgrass, is possible. <br />Deer Creek Quarry Rehabilitation June 1994 Page 4 <br />