2013-02-27_REPORT - C1981028 ‎(12)‎

• Permit No: C1981028
• IBM Index Class Name: Report
• Doc Date: 2/27/2013
• Doc Name: 2012 Annual Reclamation Report
• From: Coors Energy Company
• To: DRMS
• Annual Report Year: 2012
• Permit Index Doc Type: Annual Reclamation Report
• Email Name: BFB
• Email Name: SB1
• Media Type: D
• Archive: No

Category
RA 23
2011
RA 23
2012
RA 29
2011
RA 29
2012
RA 30
2011
RA 30
2012
RA 31
2011
RA 31
2012
Grasses
6
10
7
10
10
9
10
Forbs
7
9
7
3
Succulents
1
Woody Plants
1
Total
6
17
©
19
10
16
13
4.5 COMPARISON OF VEGETATION COMMUNITY TRENDS
Vegetation community development trends have been discussed in the above sections by
parameter.
5.0 SUMMARY
Quantitative monitoring of Reclamation Areas 23, 29, and 30 revealed that these areas
met the requirements for final revegetation success for total vegetation cover.
Reclamation Area 31 did not meet the current final revegetation success criterion after
evaluating the means using a Student's t -test.
The mean total herbaceous production values from all the reclamation areas were greater
than 90 percent of the predicted 84.7 g/m total herbaceous production success criterion,
thereby meeting the final success criterion for total herbaceous production this season.
Species composition for each of the reclamation areas was evaluated from a final success
criterion perspective. Reclamation Areas 23 and 29 had three qualifying warm season
graminoids, but each lacked a qualifying cool season graminoid to meet the final species
composition criterion. Reclamation Area 30 had four perennial warm season graminoids
and two perennial cool season graminoids, thereby exceeding the final species
composition requirements. Reclamation Area 31 had one perennial warm season
graminoid and two perennial cool season graminoids meeting the species composition
requirements this season, but lacked two qualifying perennial warm season graminoids to
satisfy all requirements of the final revegetation success criteria for species composition.
The reclamation areas sampled this season have shown significant development of a
diverse, effective, permanent vegetation cover, and are expected to continue in successful
development.
6.0 PEST AND DISEASE INSPECTIONS
Four quarterly inspections were conducted at the Keenesburg Mine to evaluate the
presence or potential for pest or disease infestations or outbreaks. The inspections were
conducted on March 23, May 29, July 12, and November 29, 2012. Inspection reports
from those inspections are located in the appendix.
Coors Energy Company Keenesburg Mine Page 21
2012 Revegetation Monitoring Report