2011-01-19_REVISION - C1981019 (7)

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Table 2 Colo o - Vegetation Cover - 2008 & 2009 (Page 2 of 2) Relative Ground Cover Summary Continued Sampling Year -> 2008 2009 Mountain Sagebrush Mountain Sagebrush Area -> Phase III Shrub R.A. R.A. Phase III Shrub R.A. R.A. Wei ht -> 100% 55% 45% 100% 55% 45% Forbs Continued I B Lactuca sernola Prickly Lettuce 0.33 - - - - - N P Lathyrus leucanthus Peavine - 1.67 1.63 N A Lepidium densitlorum Prairie Pepperweed - 0.16 - - - N P Linum lewisii Lewis Flax 1.67 - 0.35 0.10 N P Lomatium dissectum Fern leaf Biscuitroot - - 0.17 - - N P Lupins caudatus Tailcup Lupine 7.22 - 3.83 1.34 N B Machaeranthera canescens Hoary Aster - - - 0.08 - I P Medicago sativa Alfalfa 6.35 7.39 - I P Onobrychis wdaefolia Sainfoin 0.11 - - - N P Phlox hoodii Hood Phlox - 0.35 0.10 I A Ranunculus testiculatus Nut Buttercup 0.22 - - - N P Senecio multilobatus Lobeleaf Groundsel - 0.16 I A Sisymbrium altissimum Tumble Mustard 0.22 - - - N P Sphaeralcea coccinea Scarlet Globemallow - 0.69 - 0.31 N P Stellaiia jamesia Tuber Starwort 0.39 - - 0.57 - N P Stenotus armerioides Thrifty Goldenweed - 0.24 2.68 0.24 1.96 I P Taraxacum officinale Dandelion 0.11 - - - 0.08 - I A 7hlaspiarvense Field Pennycress 0.22 0.24 - 0.05 0.49 - I B Tragopogon dubius False Salsify , 0.28 0.16 0.52 - - 0.21 Sub-shrubs N P Ceratoides Janata Winterfat - 0.86 0.31 N P Eriogonum microthecum Slender Buckwheat - 0.26 - N P Gutierrezia sarothrae Snakeweed 5.01 - 5.58 N P Mahonia repens Creeping barberry 0.40 - - Shrubs & Trees N P Amelachier alnifolia Serviceberry 0.87 0.86 0.98 2.17 N P Artemisia tridentata wyo. Wyo. Big Sagebrush 0.39 19.52 16.51 0.21 17.29 20.06 N P Atriplex canescens Four-wing Saltbush - - - 0.05 - - N P Chrysothamnus nauseosus Rubber Rabbitbrush 0.56 0.09 - 0.24 1.03 N P Chrysothamnus viscidiNorus Low Rabbitbrush 2.30 0.43 1.55 1.14 N P Prunus virginiana Chokecherry 0.16 - 0.08 - N P Quercusgambellii Gambel0a - 3.49 3.83 N P Rosa woodsii Woods Rose 0.06 - - - - N P Symphoricarposoreophilus Mountain Snowberry - 10.40 2.68 - 12.23 5.27 Summary by Lifeform: Perennial Grasses 72.65 37.46 28.26 71.77 44.70 42.09 Annual Grasses 5.13 9.84 38.12 2.16 10.03 17.68 Perennial Forbs 19.83 12.22 5.01 24.85 8.24 4.24 Annual & Biennial Forbs 1.95 2.62 1.90 0.95 0.82 0.41 Noxious / Aggressive Weeds - 0.16 - - - - Sub-shrubs - 0.40 6.14 - - 5.89 Shrubs & Trees 0.45 37.30 20.57 0.26 36.22 29.68 Diversity (Number of Grasses with between 3 Si k?lah. nvor) (Forb Relative Cover %): Number of Perennial Grasses = 7 6 4 4 5 3 Relative Forb Cover Excluding Noxious Weeds = 21.78 14.84 6.91 25.80 9.05 4.65 CEDAR CREEK ASSOCIATES, Inc. Page 18 Colowyo Coal Company 2009 Phase III Bond Release Evaluation