PERMFILE130017

• Permit No: C1992080
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: APPENDIX 4-6 VEGETATION BASELINE INVENTORY JANUARY 1984 A
• Media Type: D
• Archive: No

• cover are Louisiana sage IAz,temieiv ludvvicivrtvl, wing eriogonum IE.xivyvnum
v.la#uml, redroot eriogonum IE~zivQvaum ~acemv~uml, stemless actinea, Wright
deervetch lLvtue u<xightiil, sand lupine (Lupirtue ommvphilunl, rock goldenrod
(V¢#nadv~civ pumi.lvl, slimflower scurfpea l%~v~a.lev #enui~.lv~vl, and scarlet
globemallow.
Numerous species of perennial graminoids contribute to cover.
These are, in descending order, mutton bluegrass, squirreltail, Indian
ricegrass, sideoats grama cl3vu#edvuv cu~,tipendu.lvl, galleta INi.lvaiv
gomenii), needle-and-thread (Stipv cvmv#vl, western wheatgrass IAg,xvpyicvrt
yni#hiil, prairie junegrass lKvele2iv moc~tan.thvl, and blue grama (ljvu#e,lvua
gavci.li a J .
Annual forb cover is low, comprising only 1.3 percent of the vege-
tative cover. The more common species are spreading fleabane IFiu ge2vrt
dive2gvu+.~l, dark goosefoot (Chertvpvdium v#~tvvirteMl, yellow salsify, and
bluebur stickseed ILappuda ~edvw~hiil. Other minor plant species are listed
in Table 7.
Production
Total average production is 44.9 g/2 m2 or about 200 Ibs/acre.
Perennial fortis account for about 55 percent of total production. Perennial
graminoids comprise approximately 35 percent of the production, composed
primarily of Indian ricegrass, mutton bluegrass, squirreltail, needle-and-
• thread, and sand dropseed ISpvavGvdu~ ucyptandicu~l. Oheatgrass, an annual
graminoid, produces an average of 1.1 g/2 m2, or about 8 percenT of the total.
Native and introtluced annuals produce 1.0 and 1.1 g/2 m2, respectively (Table 81.
Shrub Density and Height
Total shrub density averages 9.6 shrubs/50 m2 or about 770 shrubs/
acre. Big sagebrush accounts for about 40 percent of the total with 3.8
shrubs/50 m2. Other important species are Gambel oak and true mountain
mahogany (Table 91.
Shrub height ranges from 194 cm for skunkbush sumac to 40.2 cm for
antelope bitterbrush. Big sagebrush averages about 52 cm. Gambel oak and
true mountain mahogany average 154 and 123 cm, respectively.
Tree Density
Total tree density for The Pinyon-Juniper Woodland vegetation
type averages 17.0 trees/250 m2 or about 275 trees/acre. Pinyon pine accounts
for about 70 percent of the total with 12.2 trees/250 m2, while Utah juniper
averages only 4.8 trees/250 m2 (Table 101. Most stands are moderately dense,
but more open stands also are present. Estimated tree heights range from
about 2 m to 9 m and average about 7 m.
C~
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