2024-05-14_REVISION - C1981028

• Permit No: C1981028
• IBM Index Class Name: Revision
• Doc Date: 5/14/2024
• Doc Name: Application
• From: Habitat Management
• To: DRMS
• Type & Sequence: SL12
• Email Name: RDZ
• Email Name: AME
• Media Type: D
• Archive: No

Coors Energy Company Keenesburg Mine—Phase III Bond Release Application
Revegetation Success Demonstration
Table of Contents
1 Introduction 2
2 Revegetation and Bond Release History 2
3 Vegetation Sampling 2
3.1 Sampling Design 2
3.2 Sample Adequacy 6
3.3 Vegetation Cover 7
3.4 Herbaceous Production 7
3.5 Species Composition 7
4 Bond Release Standards 8
5 Revegetation Success Evaluation Results 9
5.1 Vegetation Cover 9
5.2 Herbaceous Production 10
5.3 Species Composition 11
6 Summary 11
7 References 11
Tables
Table 1: Reclamation Year by Reclamation Area 2
Table 2: Area 29/23, 30, and 31 Sample Adequacy 2021 6
Table 3: Area 29/23, 30, and 31 Sample Adequacy 2022 6
Table 4: 2021 and 2022 Bond Release Standards 9
Table 5: Vegetation Cover Success Standard Comparison for 2021 9
Table 6: Vegetation Cover Success Standard Comparison for 2022 10
Table 7: Herbaceous Production Success Standard Comparison for 2021 10
Table 8: Herbaceous Production Success Standard Comparison for 2022 10
Table 9: Non-Noxious Relative Cover(%) of Perennial Grasses in Areas 29/23, 30, and 31 11
Table 10: Success Standard Summary for Areas 29/23, 30, and 31 11
Figures
Figure 1: Keenesburg Mine Site Map 3
Figure 2: 2021 Sample Point Locations Reclamation Areas 29/23, 30, and 31 4
Figure 3: 2022 Sample Point Locations Reclamation Areas 29/23, 30, and 31 4
Attachments
Attachment 1: Precipitation Data 13
Attachment 2: 2021 Vegetation Cover Data 15
Attachment 3: 2021 Herbaceous Production Data 22
Attachment 4: 2022 Vegetation Cover Data 26
Attachment 5: 2022 Herbaceous Production Data 39
SL-12 i May 2024