2010-12-27_REVISION - C1981019 (2)

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Table 2 Colo o - Vegetation Cover - 2006 Relative Ground Cover Summary Area -> Phase II Mountain Sagebrush Shrub RA Ref Area Wei ht -> 100% 55% 45% Grasses and Grass -likes N P Agropyron albicans Griffiths Wheatgrass - 0.33 6.75 N P Agropyron dasystachyum Thickspike Wheatgrass 11.92 - 0.41 I P Agropyron intermedium Intermediate Wheatgrass 0.38 - N P Agropyron npanum Streambank Wheatgrass 9.26 I P Agropyronsibencum Siberian Wheatgrass 10.78 - - N P Agropyronsmithii Western Wheatgrass - 2.34 10.43 N P Agropyron spicatum inerme Beardless Bluebunch W. 1.59 - - N P Agropyron trachycaulum Slender Wheatgrass 3.87 12.52 - I P Bromusinermis Smooth Brome 4.40 - 0.20 N P Bromusmarginatus Mountain Brome - 1.67 - I A Bromus tectorum Cheatgrass 24.37 0.17 6.34 N P Carexgeyed Elk Sedge - 3.34 I P Dactylisglomerata Orchardgrass 0.68 - - N P Elymusalbicans Montana Wheatgrass - 0.82 N P Elymusonereus Basin Wildrye 2.35 - I P Elymusjunceus Russian Wildrye 3.64 N P Festuca ovina/saximontana Hard Fescue 0.30 - N P Koeleria macrantha Prairie 3unegrass - 12.47 N P Poa agasizensis Bluegrass - 29.22 8.79 I P Poa pratensis Kentucky Bluegrass 2.89 - - N P Poa secunda Sandberg Bluegrass - 0.50 7.98 N P Sitanion hystnx Bottlebrush Squirreltail 0.33 0.20 N P Stipa lettermanii Letterman Needlegrass 11.35 0.61 N P Stipa nelsonii Nelson Needlegrass 4.51 Forbs N P Achillea lanulosa Western Yarrow 0.08 0.67 0.20 N P Astragalussp. Milkvetch 10.25 - 0.20 I A Chenopodium album Lambsquarter 0.23 - N A Chenopodium berlandien Pitseed Goosefoot 0.53 N P Cirsium undulatum Wavyleaf Thistle - 1.23 N A Descuralma pinata Pinnate Tansymustard 0.08 - I A Descurainia sophia Flixweed Tansymustard 0.08 N B Gnndelia squarrosa Curlycup Gumweed 0.46 N P Hedysarum boreale Northern Sweetvetch 0.68 I B Lactuca sernola Prickly Lettuce 0.23 - N P Lathyrusleucanthus Peavine - 0.33 - N P Linum lewis# Lewis Flax 0.38 - 0.20 N P Lupinuscaudatus Tailcup Lupine - 0.17 0.20 N B Machaeranthera canescens Hoary Aster 0.15 - 0.20 I P Medicago sativa Alfalfa 3.72 - N P Penstemon stnctus Rocky Mtn. Penstemon 0.30 - N P Phloxhoodii Hood Phlox - 0.41 I A Salsola australis Russian Thistle 3.57 I A 51symbnum altissimum Tumble Mustard 0.99 - N P Sphaeralcea coccinea Scarlet Globemallow - 1.23 N P Stellanajamesia Tuber Starwort 0.50 - N P Stenotusarmerioides Thrifty Goldenweed - 3.07 I A 7771aspi arvense Field Penn cress 030 Shrubs, Cacti & Trees meat reranrola Se rviceberry - N P Amelachierutahensis Utah Serviceberry - 1.17 2.45 N P Artemisia tndentata wyo. Wyo. Big Sagebrush 0.99 13.02 24.34 N P Atnplex canescens Four -wing Saltbush 0.38 - - N P Chrysothamnusnauseosus Rubber Rabbitbrush 0.15 - N P Chrysothamnus visoditlorus Low Rabbitbrush - 0.20 N P Gutierrezia sarothrae Snakeweed - 6.13 N P Quercusgambellii Gambel0ak 6.51 - N P 5ymphoncarpos oreophilus Mountain Snowberry 11.35 4.70 Summary by Lifeform: Perennial Grasses 52.09 66.11 48.67 Annual Grasses 24.37 0.17 6.34 Perennial Forbs 15.41 1.67 6.75 Annual & Biennial Forbs 6.61 - 0.20 Noxious / Aggressive Weeds - - - Shrubs, Cacti & Treesi 1.52 32.05 38.04 Diversity Number of Species with between 3% - 50% Relative Cover). Number of Perennial Grasses = 6 5 5 Number of Perennial Forbs = 2 0 1 CEDAR CREEK ASSOCIATES, Inc. Page 13 Colowyo Coal Company 2006 Phase II Evaluation (Updated Dec -10)