REP52626

• Permit No: C1981019
• IBM Index Class Name: REPORT
• Doc Date: 4/6/2007
• Doc Name: 2006 AHR & ARR Section 9 Exhibit 9A to Section 11
• From: Colowyo Coal Company
• To: DRMS
• Annual Report Year: 2006
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Table AB-46 Colo o - Ve etation Cover - 2006
CSU~$In"' . =~~
~ ~~ g
. . _ e o e n rcept~~a mp
T2nsedNo.-> 1 2 3 4 5 Average Relative F

Grasses and Grass-!ekes
Cover
Cover req.

gropyron sprcatum ue unc eatgrass 1
N P Agropyron trachyrau/um Slender Wheatgrass 1 1 0.40 0.80 40
I P Bromus inermis Smooth Brome 4 3 6 5 3.60 7.23 80 _
I P Dacty/isg/omerab Orchardgrass 1 0.20 0.40 20
I P Poa pratensis Kentucky Bluegrass 1 2 0.60 1.20 40
Forbs
N Ac i ea anuosa estem arrow 4 1 4 1
I P Asbagaluscicer CicerMilkvetch 3 0.60 1.20 20
N B Grande/ia squarrasa Curly_cup Gumweed 4 4 1.60 3.21 40
N P Linum /ewisii Lewis Flax 8 3 5 2 5 4,60 9.24 100
N P Penstemon sbictus Rocky Mfi. Penstemon 3 4 4 2,20 4.42 60
Shrubs, Cacti & Trees
N P ARemisia mna i er Sage 1 ,00 4. 2
N P Artemisia 6idenbb wyo. Wyo. Big Sagebrush 6 17 12 6 19 12.40 24.90 100
N P Abiplexranescens Four-wing Saltbush 14 11 6 6 6 8,60 17.27 100
N P Chrysothamnusnauseosus RubberRabbitbrush 2 2 0.80 1.61 40
N P Purshia tridentata Antelope Bitterbrush 2 5 1.40 2.81 40
N P Sympharirarpiosoreophi/us Mountain Snowberry 3 0.60 1.20 20
- - ~ ~~~~++ _ _ can
Total Plant Cover 52 49 45 49 54 49.80
Rock 2 4 2 1 3 2.40
Litter 39 40 49 44 34 41.20
Bare ground 7 7 4 6 9 6.60

Total Perennial Cover
_
. _
..
.
. 48
... 49 41
...,_.-_.. 49
~ ~ 54
w-
.... _ 48.20
_-_-.
....
_
D
e
'
~
~- _
. .
.
~..,
,.
. -. _
__
No. of Perennial Grasses (3% - SDMo Rel. Cover) = 2
lv
s~ty
~
.
-- ,~ No. of Perennial Forbs (3% - 50% Rel. Cover) = 3
Sample~~deyu ~' Plant Cover Mean = 49.80 t = 1.5332 n = 5
-Caltuid~loris~ Variance = 11.70 nm~° = 1.11
AB-41