2022-10-26_PERMIT FILE - C1981041

• Permit No: C1981041
• IBM Index Class Name: Permit File
• Doc Date: 10/26/2022
• Section_Exhibit Name: Tab 10 Vegetation Information
• Media Type: D
• Archive: No

plant and west of the Denver and Rio Grande Western railroad mainline.
The study area is triangular in shape and encompasses approximately 7
acres. The topography of the site is relatively flat, with little varia-
tion from the 4760 foot elevation.
This study area will provide reclamation success standards for
the loadout and overland conveyor disturbances as well as part of the Roadside
Mine reclaimed area,
Cover
Total vegetation cover in the Greasewood Shrubland study area
averages 50.9 percent. Soil and litter cover and both high at 24.9 and
24.2 percent, respectively. Absolute cover by life form is as follows: shrubs,
24.9 percent; perennial grasses, 5.7 percent; annual grasses, 2.0 percent;
perennial fortis, 13.9 percent; annual (orbs, 3.9 percent; and cryptogams,
0.6 percent. See Table 2.
Shrubs provide almost 50 percent of the vegetation cover in this study
area. Black greasewood with a cover of 19.5 percent is not only the
dominant shrub but the major species within the study area. Rubber rabbit-
brush, a shrub species that colonizes disturbances, has a cover of 5.2
percent. Salt cedar %amatii~h aomve<~~tma, an introduced shrub common to
alkaline soil sites, is infrequently present.
• Alkali seepweed, a perennial forb with a cover of 12.6 percent,
is the principal herbaceous plant. Inland saltgrass ~iatlch~i~ ~picata
ssp. ~#21cfa is also common with a cover of 5.6 percent. Other common
herbaceous plants include pepperweed Lepidium pe~/_vdiatum, an annual forb
with a cover of 3.3 percent; cheatgrass, with a cover of 2.0 percent;
and whitetop Caicda2ia daaba, a prohibited noxious weed. Table 2 identifies
other species present within the community.
1 Production
1
Total herbaceous production of the fifty 1 m2 plots ranged
from 0.0 g/m2 to 184.9 g/m2 and averaged 50.1 g/m2 or 446.2 Ibs/ac. See
Table 3. Fortis contributed 61 percent of the biomass. Alkali seepweed,
a rather unpalatable plant with a production of 21.3 g/m2, accounted for
43 percent of }he production in the study area. cheatgrass and inland
saltgrass were almost equal in production at 2B.1 g/m2 and 26.3 g/m2,
respectively.
Shrub Density and Height
r
Total Shrub density averaged 5.7/10 m2 or 2315 plants per
acre. Two shrubs, black greasewood and rubber rabbitbrush, occurred in
~ the density quadrats. Black greasewood, with a density of 1748 plants per
acre, accounted for 76 percent of the total. Rubber rabbitbrush had a
• ~ density of 567 palnts per acre. See Table 4.
r
-8-