2011-01-19_REVISION - C1981019 ‎(6)‎

• Permit No: C1981019
• IBM Index Class Name: REVISION
• Doc Date: 1/19/2011
• Doc Name: Updated 2011 2008 Phase III Bond Release Evaulation - 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 A-5 Colo o - Vegetation Cover - 2008
Mountain Shrub Reference Area - Raw Data
Percent Ground Cover Baeed on Po int-Intercept Sampling
Tensed No
-> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 A19 20
. Average Relative
Mesic Xeric
C
C Freq.
Grasses and Grass-likes over over
N P Agmpyron alb/cans Griffiths Wheatgrass 4 6 17 2 10 1.95 3.10 25
N P Agropyronsm/thii Western Wheatgrass 3 6 25 5 2 2 6 3 2.60 4.13 40
N P Agropyron trachycaulum Slender Wheatgrass 2 5 11 8 7 24 3 1 4 1 1 4 2 1 3.70 5.87 70
N P Bromusmang/natus Mountain Brome 3 20 1 2 2 1 1 1 1 1 1.65 2.62 50
I A Bromus tectorum Cheatgrass 1 25 26 10 11 7 1 20 6 8 9 6.20 9.84 55
N P Carexgeyer/ Elk Sedge 5 3 1 2 1 1 5 0.90 1.43 35
N P Koelena macrantha Prairie 3unegrass 3 0.15 0.24 5
N P Poa agasizens/s Bluegrass 5 4 10 2 7 10 7 4 29 4 1 2 8 2 1 2 4.90 7.78 80
N P Poa secunda Sandberg Bluegrass 3 1 0.20 0.32 10
N P 51canton hystnx Bottlebrush Squirreltail 1 2 2 1 1 0.35 0.56 25
N P Stipa lettennan// Letterman Needlegrass 7 13 8 26 4 1 3 4 8 10 2 1 1 3 2 4.65 7.38 75
N P Stipa nelson/ Nelson Needlegrass 1 3 8 2 5 21 2 1 3 3 2 2.55 4.05 55
Forbs
N P A/ ea anu sa Western Yarrow 3 1 1 2 3 0.50 0.79 25
N P Allium textile Wild Onion 2 1 1 0.20 0.32 15
I B Alyssum a/ysso/des Pale Madwort 1 1 0.10 0.16 10
N P Astragalus tenellus Looseflower Milkvetch 1 1 0.10 0.16 10
Nw B C/rs/um vulgate Bull Thistle 2 0.10 0.16 5
N A Co/i/ns/a paryiflora Maiden Blue Eye Mary 6 2 1 1 2 0.60 0.95 25
N A Co/lomia Anearis Slenderleaf Collomia 2 2 1 1 2 1 1 1 1 0.60 0.95 45
N P Leal/um b/fol/um Twinleaf Bedstraw 2 4 5 1. 4 2 3 1.05 1.67 35
N P Lathyrusleucanthus Peavine 2 1 1 1 3 5 6 2 1.05 1.67 40
N A Lepidium densiflorum Prairie Pepperweed 2 0.10 0.16 5
N P Lupins caudatus Taikup Lupine 25 10 2 4 6 5 1 3 2 9 4 1 1 10 3 5 4.55 7.22 80
N P Senec/o multilobatus Lobeleaf Groundsel 2 0.10 0.16 5
N P 5tenotusarmenodes Thrifty Goldenweed 3 0.15 0.24 5
I A Thlaspi amense Field Pennycress 3 0.15 0.24 5
I B Tragopogon dubius False Salsify 2 0.10 0.16 5
Sub-shrubs
Mahone repens reepmg a rry 77 2 1 0.25 1 0.40 1 15
Shrubs, Cacti & Trees
N P Ame sera 0b Service erry 4 1 1 2 2 1 0.55 0.87 30-
N P Artemis/a tddentata wyo. Wyo. Big Sagebrush 8 10 3 1 20 6 22 8 22 16 28 20 10 24 29 19 12.30 19.52 80
N P Chrysothamnus nauseosus Rubber Rabbitbrush 7 0.35 0.56 5
N P Chrysothamnus v/scid/floras Low Rabbitbrush 1 1 6 13 6 1 1 1.45 2.30 35
N P Prunus vinginiana Chokecherry 2 0.10 0.16 5
N P Quetrus gambel// Gambel Oak 2 4 19 7 3 3 3 3 2.20 3.49 40
N P ymp or/carpas oreop /us Mountain Snow berry 1 1 1 15 4 19 7- 5 1 1 1-6.4-0 0
Mean
Total Plant Cover 69 64 62 51 62 68 60 57 77 53 65 67 61 73 60 55 64 62 65 65 63.00
Rock 0 1 0 0 0 0 3 0 0 0 1
0 0 0 3 1 0 0 1 0 0.50
Litter 29 25 37 43 34 31 34 31 22 42 27 33 37 27 33 t26 36 30 31 18 31.30
Bare round 2 10 1 6 4 1 3 12 1 5 7 0 2 0 4 8 0 8 3 17 5.20
Total Perennial Cover 65 58 58 48 62 T67 59 55 76 50 37 37 50 61 Si 54 44 56 55 56 55.05

No. of Perennial Grasses (3% - 50% Rel. Cover) = 6
Diversity,
No. of Perennial Forbs (3% - 50% Rel. Cover) = 1
Sample Adequacy Calculations Plant Cover Mean = 63.00 t= 1.33 n = 20
Variance = 39.79 n.j. = 1.77