PERMFILE130512

• Permit No: C1984065
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: 3.6 VEGETATION INFORMATION
• Media Type: D
• Archive: No

Table 3.6-1. Percent Cover for the Sagebrush Community
. Surface
Refe[e nce Area Facilities Area
Shrubs 26.3 91.0
Forbs 9.1 1.3
Gcasses
(perennial and annual) 25.2 32.6
Total 60.6 74.9
Table 3.6-2. Species Diversity
Species diversity as represented by the relative cover of the major species
present in [he sagebrush vegetation type and reference area.
Percent Relative Cover
Species Sa ebrush T e Re feRe re
Arteme sla trident ata
Agropy ron sm1th11 2.0 4.3
Agropyron cri s[atum 9.8 28.1
_ Si [anion by ste rSx 5.4 2.B
Pca fendle ri ana 4.4 1.0
Roele ria crl st ata 3.4 1.0
Astragu lus crasslcarpus 1.4 8.9
Bromus tectorum 19.5 3.B
3.6,2.2.2 Production Data
• Production samples were collected utilizing the double sampling
technique on both the previously proposed disposal area and
reference area. Double sampling or regression sampling is a method
for determining vegetative production where plots are both clipped
and estimated. In this method, only a relatively few plots are
physically sampled and all plots estimated for production by visual
means. Relationships between the two sample groups are determined
from regression equations and the clipped production values are
then predicted for those plots where biomass production was only
estimated.
Along the transects in the sagebrush community, 1 sq. meter
circular plots were placed every 10 meters. Within the plots,
utilizable forage (i.e., all above-ground biomass for grasses and
forb; leaves and green twigs for shrubs) was estimated by species.
In one of every four plots sampled, the biomass was clipped, bagged
and weighed in the field. In addition to providing the basis for
. the regression analysis, this also provided a check for the field
NCEC - Coal Ridge $1 3-67 ABC/1145/900301