2009-03-27_REPORT - C1981019 ‎(7)‎

• Permit No: C1981019
• IBM Index Class Name: REPORT
• Doc Date: 3/27/2009
• Doc Name: 2008 AHR & ARR Exhibit 9A
• From: Colowyo Coal Company
• To: DRMS
• Annual Report Year: 2008
• Permit Index Doc Type: Hydrology Report
• Email Name: JRS
• Media Type: D
• Archive: No

Compendium 3 - S16Y12
REVEGETATION DATA
Ground Cover
w "?•tQ
''.ArY'
xx `` 3 12 15
1 2003 005, 2003 20DS 2011
- Perennial Grasses 50.1 58.2
Perennial Forbs 4.8 11.2
Shrubs 0.3
Annuals / Biennials 5.0 2.8
Later 21.5 23.9
'
R ?Standmp Dead
1 A-k 0.5 0.2
- ?L Bare Ground 17.8 3.7

j Ground Cover

4a r ?: '
4 - -
100°.L
1
soft i

REVEGETATION SPECIFICATIONS
T - ----A, 19

:OON

f C"N., 413^.
ect: Av . Slope:
I
40°ro
otes:
20°'•0
Topsoil: Mo/Yr of Placement:
Depth of Placed Togoil
Surface Preparation:
2003 2005 2003 2008 2011
Soil Au mentation Activites Mo./Yr. Iba/ac.
Woody Plant Density countable Shrubs
., ., .., ,..:.,- 2 4 7 t2 Is
!•e: ':u: w+r 2003 2005 2003 2008 2017
Young 8 Mature per acre 239 119
Seedin Dominant Emer gent Spe cies' Woody Plant Density
Method: (Most Current Year only ) 1400 --
Total i PIS / Acre:
Mo./Yr. of Seed) Saedad Spades r.rc..e
C.var a 1200

< 1000

...........................................................................
Species Seeded: • P7S!., Thlckspike Whoatgrass 43.07 Suues. Crder.on - 1000 Plants : euc
Cruses ls. SS Cicer Milkvetch 13.85 800
... w?<.r:u?..,• 1 el Stream bank Wheat rasa 11.63 n 600
n
r wn.•et r 11.1 Wnatern Whoa ...s 5.47 i 400
>.a W-19- 0 w Brim Wad a 4.22 a 200
3
s1urr>n whear. n w Kentucky Bluegrass 3.88 0
w>,rar"
-",t-"
W aJ Slender Wheat rass 3.81 2003 2005 2003 2008 2011
I
nr ealeraf.
W 1 67 Smwth 81.me 2.84
i•. -..t Wheat ri.. u Is Hard Fescue 1 5:. Current An_n_u_al_ Productio n Pounds per Acre
from. 0w Western Yarrow I.is ....„ .......... 2 4 7 12 IS
aroma
-- DJ .r,;,::. 2003 2005 2003 2008 2011
. a 33 Perennial Grasaos 2,492.6 2,084.1
0 7•. Perennial Forb. 81.9 160.6
n, idrya 1 n Sub-shrubs - -
o w Annual Grasses 1.4 -
0 13 Annual Forbs 3.4 8.9
r:•, 011 Voluntaars Total 2,579.3 2,253.6 -
. &.r u 25 Crestetl Whea[ r 7 45
v..•er
` 1 43 Beardless Bluebunch W. 1.1 i Current Annual Production
Forth
. 3-39 Japanese 8rome 104 3000
vnlch 1 t•7
eal.amre.l n 2S 2500
v...... -w.eevaecn a w
.. 0 3 r- Tex. w/ 1%-rnp-t- - tarn 2000
0.1 , rounemg toward di--ty st.ndard
11,1111-1 ,.rernen 0-1 r 13°.h<X<50"70

' 1500
P-tam.n 01 p
W..•r larrpN 017 Reniediation/Weed Control
too0
Shrub. 3.01 Measures ; Other Notes.

--- 2008 Succea.
C. nr•rwn- 4271b./acre
+?., ,.r•..,.Y
_- .. IIw Soo ............................... .... ..............
•••
ti?ga 0.13
saltbo.n t tan 0
I _
au., e?,r
r_._.r, 2003 2005 2003 2008 2011
w.:.
RECOMM ENDATIONS Diversity (Number of Spades between 3% and 50% Relative Cover)
Ex. client Grass ..+nd For6 Drv.•r+dy S--'. (rdrrron - t /w•r. w, s 1 }-rarh tHf
rus t- 31a• a

? nd 50°/. Radar- C--,
_
- + 4 I7
J
, l: 15
.001 005 ,os :0f1

Rio Tinto Energy America/Colowyo Mine Page 17 Revegetation Monitoring - 2008