2011-01-19_REVISION - C1981019 (6)

Home Browse Search

Table 1 Colo o - Vegetation Cover - 2008 (Page 2 of 2) Average Ground Cover Summary Sampling Year -> 2007 2008 Area -> Phase III I Mountain Sagebrush Weighted Phase III Mountain Sagebrush Weighted Shrub R.A. R.A. Reference Shrub R.A. R.A. Reference Wei ht-> 100% 65% 45% Values 100% 65% 45% Values Fors Continued N A Lep/dium dens/ orum Prairie Pepperweed - - - .10 N P Linum lewis/i Lewis Fla 0.43 0.30 0.14 0.33 - 0.20 0.09 N P Lomatium dissectum Femleaf Biscuitroo - - - - - - 0.10 0.05 N P Lupinuscaudatus TailcupLupine 030 0.25 0.50 4.55 - 2.50 N P Lupinussp. Lupin - 0.05 0.02 - - N B Machaeranthera canescens Hoary Aster 0.05 0.03 I P Med/cagosabva Alfalfa 2.93 - - 3.80 N P Phlox hood// Hood Phlox - - 0.20 0.09 I A Ranunculus testiculatus Nut Buttercup 0.03 0.20 N P Senec/o mu/tilobatus Lobeleaf Groundsel 0.10 0.06 - 0.10 0.06 I A 51symbrium altissimum Tumble Mustard 0.03 - - 0.03 - - N P S haeralcea cocrinea Scarlet Globemallow - 0.05 0.02 - 0.40 0.18 N P Stenotusarmenoides Thrifty Goldenweed - 2.10 0.95 - 0.15 1.55 0.78 I A Thlaspi arvense Field Pennycress 0.13 0.05 0.02 0.03 0.15 0.08 I B Tragopogon dubius False Salsi 0.03 0.10 0.05 0.07 0.10 0.30 0 19 m enti a le O-OS :02 :03 . Sub-shrubs N P Cerato/ eslanata Winterfa 0.20 0. 9 0.5 0.2 N P Enogonum m/crothecum Slender Buckwhea - - 0.15 0.07 N P Gutierrez/a sarothrae Snakeweed 1.05 0.47 2.90 1.31 Ma oma repens reeping r - - 0.25 14 Shrubs, Cacti & Trees N P Amel /eranifol/a Serviceberry 0.80 1.15 0.96 0.55 0.50 .53 N P Anemisia cana Silver Sage - - - - - - N P Artemisia hidentata wyo. W yo. Big Sa ebrush 0.20 11.30 10.00 10.72 0.33 12.30 9.55 11.06 N P Ampler canescens Four-wing Saltbush - - - - - - - N P Chrysothamnusnauseosus Rubber Rabbitbrush 0.30 - 0.17 0.50 0.35 0.05 0.22 N P Chrysothamnus v/sc/d/Aorrts Low Rabbitbrush 0.30 0.40 0.35 1.45 0.25 0.91 N P Mahon/a repens Creeping Barberry 0.05 - 0.03 N P Prunus wrg/niana Chokecherry - - 0.10 - 0.06 N P Quetcusgambel// Gambel Ca 2.75 1.51 - 2.20 1.21 N P Rosa sp. Ornamental rose 0.33 N P Symphoncarposoreophilus Mountain Snowber 4.40 2.20 3.41 0.03 6.55 1.55 4.30 Total Plant Cove 70.00 56.35 57.25 56.76 70.83 63.00 57.85 60.68 Roc' 0.27 0.65 2.95 1.69 0.53 0.50 2.40 1.36 Litte 24.57 33.60 29.05 31.55 24.53 31.30 25.60 28.74 Rare round 5.17 9.40 10.75 10.01 4.tn 5.7n 14.15 9.23 Total Perennial Cover 67.77 5135 41.95 47.12 66.50 55.05 3430 45.89 Summa b Lifeform: _ Perennial Grasses 56.50 29.30 22.30 26.15 54.40 23.60 16.35 20.34 Annual Grasse 1.47 4.55 12.75 8.24 3.37 6.20 22.05 13.33 Perennial Forbs 11.07 2.15 4.65 3.28 10.90 7.70 2.90 5.54 Annual & Biennial Forbs 0.77 0.45 2.55 1.40 0.97 1.65 1.10 1.40 Noxious / Aggressive Weeds - - - - - 0.10 - 0.06 Sub-Shrubs - - 1.25 0.56 - 0.25 3.55 1.74 Shrubs 0.20 19.90 13.75 17.13 1.20 23.50 11.90 18.28 Sample Adequacy Calculations: Mean = 70.00 56.35 57.25 70.83 63.00 57.85 Variance = 55.448 83.397 148.934 81.316 39.789 87.19 n = 30 20 20 20 20 20 nm.„ = 1.95 4.63 8.01 2.86 1.77 4.59 CEDAR CREEK ASSOCIATES, Inc. Page 16 Colowyo Coal Company 2008 Phase III Bond Release Evaluation