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 A2 Colo o - Vegetation Cover - 2008
Phase III Year 1 -SRaw Data
P ercen t Gro und Cover eased on Point-intercept Sampling
Trvnsect NO.-> 1 2 10 11 13 14 16 17 19 20 22 23 25 26 28 29 31 32 34 35 31 38 40 41 43 44 Average Relative

Grasses and Grass-likes
Cover
Cover Freq.
I P Agropyron cristatum Crested Wheatgrass 23 4 22 22 2 6 31 12 7 25 22 14 5 14 12 28 3 6 6 1 14 10.73 15.54 70
N P Agropyron dasystachyum Thickspike Wheatgrass 3 4 7 13 33 6 19 33 16 42 16 12 10 1 18 21 17 9 7 5 4 16 5 12 33 29 15.04 21.78 87
N P Agmpyion npanum Streambank Wheatgrass 7 6 6 12 6 8 20 2 8 21 12 11 14 5.12 7.41 43
N P Agmpymn smithii Western Wheatgrass 3 5 3 4 3 8 14 14 2.08 3.01 27
N P Agropyronsptcatum Bluebunch Wheatgrass 3 2 0.19 0.28 7
N P Agropyron spicatum inerme Beardless Bluebunch W. 8 1 4 3 3 4 2 2 1.04 1.50 27
N P Agropyron trachycau/um Slender Wheatgrass 1 3 1 7 4 2 1 0.73 1.06 23
I P Bmmus inermis Smooth Brome 13 1 4 4 2 37 18 27 1 6 4 2 10 5 1 5.19 7.52 5o
.- A Bromusjaponicus Japanese Brome 20 3 1 2 2 2 6 8 4 5 1 2.08 3.01 37
N P Bmmus marginatus Mountain Brome 1 1 0.08 0.11 7
I A Bmmus tectorum Cheatgrass 5 1 1 5 1 14 4 7 1.46 2.12 27
I P Dactylisglomerata Orchardgrass 5 0.19 0.28 3
N P Elymus cinereus Basin Wildrye 28 1 18 1 4 11 5 1 21 1 4 6 3.88 5.63 40
I P Elymusjunceus Russian Wildrye 1 8 2 2 1 2 3 2 3 1 3 1.08 1.56 37
N P Festuca ovina/saximontana Hard Fescue 1 1 1 0.12 0.17 10
N P Hordeumjubatum Foxtail Barley 3 0.12 0.17 3
1
N P Koelena macrantha Prairie Junegrass 1 0.04 0.06 3
I P Phleum pratense Timothy 1 0.04 0.06 3
I P Poo bulbosa Bulbous bluegrass 1 0.04 0.06 3
I P Poa piatensis Kentucky Bluegrass 2 6 9 7 10 16 16 32 5 4 1 3 4.27 6.18 40
N P Poa,--mnda Sandberg Bluegrass 4 0.15 0.22 3
N P Sitanion hystnx Bo a rush Squirreltail 1 0.04 0.06 3
Forbs
N P Allium textile Wild Onion 1 0.04 0.06 3
I B Alyssum alyssoides Pale Madwort 1 1 1 1 1 1 0.23 0.33 20
I P Astragalus cicer Cccer Milkvetch 16 44 9 43 3 1 2 4 1 1 3 2 46 3 S 4 5 8 7.69 11.14 60
N A Collomra lineanss Slenderleaf Collomia 1 0.04 0.06 3
I B Daucus carota Queen Anne's Lace 1 0.04 0.06 3
N B Gnndelia squarmsa Curlycup Gumweed 1 3 0.15 0.22 7
I B Lactz rd serriola Prickly Lettuce 1 1 4 0.23 0.33 10
N P Linum lewisii Lewis Flax 1 4 1 1 18 3 1 1 1.15 1.67 27
I P Medicago sativa Alfalfa 16 18 26 3 51 4.38 6.35 17
I P Onobrychis viciaefolia Sainfoin 1 1 0.08 0.11 7
I A Ranunculus testiculatus Nut Buttercup 3 1 0.15 0.22 7
I A Sisymbnum altimmum Tumble Mustard 4 0.15 0.22 3
N P Stellanajamestana Tuber Starwort 3 1 3 0.27 0.39 30
I P Taraxacum officinale Dandelion 2 0.08 0.11 3
I A 7hlaspi arvense Field Pennycress 1 1 1 1 0.15 0.22 13
I B Tragopagon dubius False Salsify 1 1 2 1 0.19 0.28 13
Sub-shrubs
None 0.00 1 0.00 0
Shrubs & Trees
N P A&Lrnisia tridentata tv ov Wyo. Big Sagebrush 7 0.27 0.39 3
N P Rosa woodsii Woods Rose 1 0.04 0.06 3
Mean
Total Plant Cover 91 71 86 74 49 76 59 58 74 80 65 58 48 72 61 64 61 86 71 66 79 63 77 52 77 77 69.04
Rock 0 2 0 0 2 0 0 0 0 0 2 1 3 3 3 0 2 0 0 1 2 0 0 1 1 1 0.92
Litter 9 19 12 24 40 22 20 35 22 20 28 27 29 19 22 20 37 13 25 21 17 27 16 25 20 21 22.69
Bare ground 0 8 2 2 9 2 21 7 4 0 5 14 20 6 14 16 0 1 4 12 2 10 7 22 2 1 7.35
C, I Perennial Cover 91
- 71 66 62 47 75
- 58 48 71 79 51 57 46 68 56 62 58 84 71 60 68 52 72 44 77 74 64.15

Diversity No. of Perennial Grasses (3% - 500/a Rel. Cover) = 7
Relative Forb Cover Excluding Noxious Weeds (% = 21.78
Sample Adequacy Calculations Plant Cover Mean = 69.04 t= 1.32 n = 26
Variance = 131.08 nmi„ = 4.77