2019-03-28_REPORT - C1981028

• Permit No: C1981028
• IBM Index Class Name: Report
• Doc Date: 3/28/2019
• Doc Name: Annual Hydrology Report
• From: Coors Energy Company
• To: DRMS
• Annual Report Year: 2018
• Permit Index Doc Type: Hydrology Report
• Email Name: RDZ
• Media Type: D
• Archive: No

Keenesburg Mine 2018 Vegetation Monitoring Report
Table 10: Reclamation Area 33 Success Criteria
6.1.4 Reclamation Area 34
Reclamation Area 34 is a 6.9 -acre parcel that was formerly part of Topsand piles A and B. This
area was graded to blend into the reclaimed mining and operational areas to the south resulting in
an almost flat area. Final revegetation seeding with the DRMS-approved permanent seed mixture
took place in October 2016.
Total vegetation cover on Reclamation Area 34 averaged 36.3% (Table 11, Appendix A), and
total non -noxious vegetation cover was 32.0%. Non -noxious vegetation cover in Reclamation
Area 32 met sample adequacy with the minimum 15 samples. Two annual native grasses, false
buffalograss (Munroa squarrosa) and sixweeks fescue, contributed a total of 26.6% of the
overall relative cover which exceeded the allowable 10% to be used in final hypothesis testing.
Thus, the average allowable vegetation cover was only 26.4%.
Table 11: Reclamation Area 34 Summary �tatictirc
Area 34
90%
SummarV Statistics
Reclamation Success
Reclamation
Technical
Criteria
Area
Standard
Pass?
Total Vegetation Cover
36.3
2.1
Non -Noxious Vegetation Cover
Allowable* Cover %
42.3
33.6
Yes
Species Composition
Grass Cover
36.0
2.1
(perennial grass, warm, cool) 1
10,6 1
3,1
Yes
6.1.4 Reclamation Area 34
Reclamation Area 34 is a 6.9 -acre parcel that was formerly part of Topsand piles A and B. This
area was graded to blend into the reclaimed mining and operational areas to the south resulting in
an almost flat area. Final revegetation seeding with the DRMS-approved permanent seed mixture
took place in October 2016.
Total vegetation cover on Reclamation Area 34 averaged 36.3% (Table 11, Appendix A), and
total non -noxious vegetation cover was 32.0%. Non -noxious vegetation cover in Reclamation
Area 32 met sample adequacy with the minimum 15 samples. Two annual native grasses, false
buffalograss (Munroa squarrosa) and sixweeks fescue, contributed a total of 26.6% of the
overall relative cover which exceeded the allowable 10% to be used in final hypothesis testing.
Thus, the average allowable vegetation cover was only 26.4%.
Table 11: Reclamation Area 34 Summary �tatictirc
The only species contributing to the cover in all 15 transects was sand dropseed which
contributed 45.3% of the overall relative cover. Cheatgrass contributed 11.9% of the total
relative cover and with cheatgrass removed six total species contributed more than 3% of the
relative cover including (in decreasing order): sand dropseed, false buffalograss, sixweeks
fescue, prairie sandreed, Indian ricegrass (Achnatherum hymenoides), and blue grama.
Thirteen species from five life forms contributed to the cover data and 11 other species were
encountered along the transects (Table 12, Appendix Q. Eighteen grasses, five forbs, and one
woody species were recorded, 22 of which were native or desirable and two were introduced.
Habitat Management, Inc. 17 October 2018
Area 34
SummarV Statistics
Mean
SE
Absolute Cover Statistics
Total Ground Cover
78.1
4.0
Total Vegetation Cover
36.3
2.1
Non -Noxious Vegetation Cover
32.0
2.0
Allowable Vegetation Cover
26.4
2.0
Grass Cover
36.0
2.1
Forb Cover
0.0
0.0
Woody Cover
0.3
0.3
Non -Noxious Relative Cover Statistics (%
Grass Cover
99.4
0.6
Forb Cover
0.0
0.0
W924y Cover
0.6
0.6
The only species contributing to the cover in all 15 transects was sand dropseed which
contributed 45.3% of the overall relative cover. Cheatgrass contributed 11.9% of the total
relative cover and with cheatgrass removed six total species contributed more than 3% of the
relative cover including (in decreasing order): sand dropseed, false buffalograss, sixweeks
fescue, prairie sandreed, Indian ricegrass (Achnatherum hymenoides), and blue grama.
Thirteen species from five life forms contributed to the cover data and 11 other species were
encountered along the transects (Table 12, Appendix Q. Eighteen grasses, five forbs, and one
woody species were recorded, 22 of which were native or desirable and two were introduced.
Habitat Management, Inc. 17 October 2018