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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a
A
Table A3 Colo o - Vegetation Cover - 2009
Phase III Year 2 - Raw Data
Percen t Ground Cover Based on Point-Intercept Sampling
Transect No.> 1 2 4 5 7 8 10 11 13 14 16 17 19 20 22 23 25 26 28 29 31 32 40 41 43 44 Average Relative
F
Grasses and Grass-likes Cover Cover es'
I P Agropyron aistatum Crested W eatgrass 8 18 11 4 10 37 14 33 40 2 9 10 9 21 3 10 2 9 13 10.12 13.88 73
N P Agropyron dasystachyum Thickspike Wheatgrass 5 10 19 14 3 4 8 16 50 8 33 55 26 20 35 27 28 42 26 18 25 28 5 2 41 21.08 28.92 96
N P Agropyron riparium Streambank Wheatgrass 5 4 8 2 2 1 28 2 8 1 9 18 30 5 4.73 6.49 54
N P Agropyronsmithii Western Wheatgrass 11 1 12 2 11 11 2 2B 10 25 6 8 3 11 10 20 6 3 10 14 4 12 8 8.77 12.03 88
F
N P Agropyron spicatum Bluebunch Wheatgrass 5 2 0.27 0.37 8
I P Bromus inermis Smooth Brome 9 2 9 1 3 4 2 10 6 5 1.96 2.69 38
I A Bromus japonicus Japanese Brome 4 1 3 1 1 2 2 1 1 2 1 2 1 0.85 1.16 50
N P Bromus marginatus Mountain Brome 3 1 0.15 0.21 8
I A Bromus tectorum Cheatgrass 6 3 8 2 0.73 1.00 15
I P Dactylisglomerafa Orchardgrass 1 4 0.19 0.26 8
N P Elymuscinereus Basin Wildrye 4 5 3 1 4 10 7 6 8 1.85 2.53 35
I P Elymusjunceus Russian Wildrye 2 4 0.23 0.32 8
N P Festuca ovina/saximontana Hard Fescue 14 2 3 3 1 0.88 1.21 19
I P Phleum pratense Timothy 2 0.08 0.11 4
I P Poa pratensis Kentucky Bluegrass 3 8 7 4 3 5 7 1 3 2 3 3 1.88 2.59 46
N P Poa secun a Sandberg B uegrass 3 0.12 0.16 4
Forbs
N P AoWllea lanulosa Western Yarrow 2 0.08 0.11 4
N A Alyssum alyssoides Pale Madwort 1 1 1 0.12 0.16 12
I P AStragalusCicer Cicer Milkvetch 23 24 3 29 4 13 23 6 4 17 40 2 24 10 64 29 7 5 2 12.65 17.35 73
N A Cogins/a paryiflora Blue-eyed mary 5 0.19 0.26 4
N A Collomia Aneads Slenderleaf Collomia 1 1 1 0.12 0.16 12
N B Grindelia squarrosa Curlycup Gumweed 4 2 0.23 0.32 8
I P Medicago sativa Alfalfa 4 2 11 7 59 25 23 4 3 2 5.38 7.39 38
I A 7hlaspiarvense Field Pennycress 1 0.04 0.05 4
Sub-shrubs
_
None T 0.00 0.00 1 0
Shrubs & Trees
N P Artemisia tridentate wyo. Wyo. Big Sagebrush 1 3 0.15 0.21
8

N P
Atriplexcanescens
Four-wing Saftbush
1
0.04
0.05
4
L
Mean
Total Plant Cover 67 59 71 61 79 70 59 78 91 64 76 86 81 63 56 87 84 65 80 84 93 69 85 60 53 74 72.88
Rock 0 1 0 2 0 1 1 0 1 1 0 0 0 0 0 5 0 0 1 0 0 2 0 0 4 1 0.77
Litter 26 19 20 30 12 23 34 21 8 31 21 14 19 27 34 8 15 23 19 15 7 21 11 34 17 23 20.46
Bare ground 7 21 9 7 9 6 6 1 0 4 3 0 0 10 10 0 1 12 0 1 0 8 4 6 26 2 5.88
Tots Perennia Cover 58 5 70 55 78 8 58 7 91 58 1 13 86 79 3 49 1 86 82 55 80 73 92 69 81 60 53 72 70.62
No. of Perennial Grasses (3% - 50% Rel. Cover) = 4
Diversity
Relative Fort; Cover Excluding Noxious Weeds % = 25.80

Sample Adequacy Calculations
I Plant Cover Mean = 72.88 t= 1.32 n = 26
V arian ce = 134 .51 nm l„ = 4.39