2016-02-29_REPORT - C1981028 ‎(12)‎

• Permit No: C1981028
• IBM Index Class Name: Report
• Doc Date: 2/29/2016
• Doc Name: Annual Hydrology & Reclamation Report
• From: Coors Energy
• To: DRMS
• Annual Report Year: 2015
• Permit Index Doc Type: Annual Reclamation Report
• Email Name: TNL
• Email Name: DIH
• Media Type: D
• Archive: No

Keenesburg Mine 2015 Vegetation Monitoring Report
Reclamation Areas 23, 29, and 30. Perennial grasses are 70% of the production in Reclamation
Area 31; however, this area also has considerably lower production that any of the other areas
(Table 16). While Reclamation Area 31 production did increase between 2012 and 2014, the
trend for perennial species is the same as in all other areas (Figure 8).
Table 16: Herbaceous Production Success Standard Comnarison
Herbaceous Production
(g/mz)
Reclamation
Area 23
Reclamation
Area 29
Reclamation
Area 30
Reclamation
Area 31
Mean
110.44
90.69
87.41
60.73
Mean (minus noxious)
78.80
77.75
74.91
52.56
St Dev
63.53
42.52
71.26
34.26
N
5
15
15
15
Nmin
152.74
54.10
163.73
76.85
Standard
192.28
90% of Standard
173.05
Standard Passed?
No
No
I No
No
Figure 8: Herbaceous Production by Life Form 2012 — 2015
160
140
r
120
100
L 80
c
60
J
s
40
L
_U
�- 20
0
2012 2015 2012 2015 2012 2014 2015 2012 2014 2015
Area 23 Area 29 Area 30 Area 31
■ Perennial Native Annual Native Annual Introduced Forbs ■ Cheatarass
The reasons for the decrease in production are likely the same as those postulated above
regarding vegetation cover. Additionally, the above average precipitation in 2013-2014 and
2014-2015 resulted in a large increase to the predicted standard values, but not a large increase in
actual production on the ground. This discrepancy could be due to the timing of the precipitation.
In both years, the majority of the extra precipitation fell in large storm events in September and
May. The September 2013 precipitation fell so fast that it caused flooding in much of the state
Habitat Management, Inc. 21 October 2015