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1 <br />~ I VEGETATION <br />' Field observations of vegetative residue and new <br />growth nn May 6, 1977, indicated that only grassy and shrubby <br />' plant species are present. From 40 to 608 of the ground <br />surface had vegetative cover at that time. This would in- <br />' crease significantly later in the growing season. <br />Indian rice grass, oryzopsis hymenoides, and needle and <br />thread, stipa comata, are the dominant species composing from <br />' 30 to 708 of the vegetative cover. Indian rice grass was <br />more visually apparent than needle and thread because of <br />' its greater height, a maximum of 18 inches as compared to <br />' 12 inches for needle and thread. Other notable plant species, <br />each of which composed less than 158 of the cover, are blue <br />' grama, bouteloua gracilis, pasture sage, artemisia frigida, <br /> rabbitbrush, chrysothammus nauseosus, and cacti, opuntia sue. <br />' Blue grama grew to a height of 12 inches the previous year. <br /> Rabbitbrush ranged in height from 18 to 36 inches, while <br />' <br /> the cacti are low growing, about 4 inches in height. The <br />' U.S. Soil Conservation Service has given a range classifica- <br /> tion of Dry Mountain Outwash Site to this area. <br />' <br /> WATER RESOURCES <br />' The proposed pit lies in an area of flat-lying topography <br /> and is not transsected by surface drainage courses. No effect <br />' on surface water drainage is anticipated. <br /> The pit is not expected to be excavated to a depth suffi- <br />' <br /> cient to affect groundwater. <br />1 <br /> D-2 <br />1 <br />