2011-01-19_REVISION - C1981019 ‎(7)‎

• Permit No: C1981019
• IBM Index Class Name: REVISION
• Doc Date: 1/19/2011
• Doc Name: Updated 2011 2009 Phase III Bond Release Evaluation - Year 2
• From: Colowyo Coal Company
• To: DRMS
• Type & Sequence: SL5
• Email Name: JRS
• Email Name: SB1
• Media Type: D
• Archive: No

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Table 3 Colowyo - Vegetation Production - 2008 & 2009
Summary of Current Annual' Production by Unit and Lifeform
Poun ds (Ibs) per Acre
Perennial Perennial Sub- Annual Annual Noxious TOTAL
Area Weight Grasses Forbs Shrubs Grasses Forbs Weeds Ibs / ac Perennial Ibs / ac
Phase III - Year 1 100% 1,494.3 359.1 - 28.9 810 - 1,890.4 1,853.5
ao a, Mountain Shrub 55% 505.1 64.3 - 11.24 2.7 1.2 584.6 569.4
p C

N N
a
Sagebrush
45%
257.1
54.8
46.9
240.2
9.3
608.2
358.8

d
Weighted Average
393.5
60.0
21.1
114.3
5.65
0.69
595.2
474.6
Phase III - Year 2 100% 1,884.2 85.9 - 8.5 9.1 - 1,987.6 1,970.1
a, y Mountain Shrub 55% 535.0 49.1 - 41.28 4.6 630.0 584.1

n C m
y 0
Sagebrush
45%
564.4
42.3
33.2
105.5
6.0
9.0
760.3
639.9

d
°G
Weighted Average
548.2
46.1
14.9
70.2
5.22
4.04
688.6
609.2

Chart 4
Summary of Current Annual Production by Unit and Lifeform - 2008 & 2009
2,400
¦Noxious Weeds
1,800 - - -
®Annual Forbs

i ?Annual Grasses
Q
®Sub-shrubs
d
a 1,200 - - - -
Success Standard - 900/. of Ref. Areas - --- -- -- oPerennial Forbs
V Perennial Average ¦Perennial Grasses
e
0
0
a
600 _ --
0
Phase III Mountain Sagebrush Phase III Mountain Sagebrush
Year l Shrub R.A. R.A. Year 2 Shrub R.A. R.A.
2008 2009