2021-01-05_REVISION - C1981022 ‎(3)‎

• Permit No: C1981022
• IBM Index Class Name: Revision
• Doc Date: 1/5/2021
• Doc Name Note: Application Cover Letter & Revised Pages
• Doc Name: Proposed Revision Materials
• From: Oxbow Mining, LLC
• To: DRMS
• Type & Sequence: SL5
• Email Name: LDS
• Email Name: JDM
• Media Type: D
• Archive: No

Based on the results of the 2019 quantitative sampling, the post-SMCRA reclaimed areas
exceeded the final revegetation total live vegetation cover success criterion of 9.34 percent,
thereby meeting the final revegetation success criterion and supporting the post -mining land
use.
Total Herbaceous Production (2019)
Xbar
Number of samples
Number of samples for sample adequacy
2019 Extended 2019 post-SMCRA
Reference Area Reclaimed Areas
58.07 g/m2 (1) 250.51 g/m2
9.5 g/m2 55.4 g/m2
15 16
7 9
(2) Vegetation success criterion is the total herbaceous production of the extended reference
area
Based on the results of the 2019 quantitative vegetation sampling, the Elk Creek Mine post-
SMCRA reclaimed areas exceeded the final revegetation total herbaceous production success
criterion of 58.07 g/m2, thereby meeting and exceeding the final revegetation success criterion
for total herbaceous production and supporting the post -mining land use.
Post-SMCRA Reclamation Success: Species Composition (2019)
The Elk Creek Mine permit document specifies that to meet the requirements of the
revegetation success criterion for species composition, species composition on any applicable
post-SMCRA reclaimed areas will be successful when there are three or more perennial or
biennial plant species of which two are graminoids and one is a perennial or biennial forb or
shrub. No one component of the above three species should comprise greater than 60% relative
cover nor less than 2% relative cover, during a given year's quantitative sampling.
The following reflects the number of individual species required by the success standard and
the number of individual species encountered in quantitative sampling this year at the post-
SMCRA reclaimed areas.
Oxbow Mining, LLC Elk Creek Mine Page 9
2019 Phase III Bond Kelease Po5t-5MCKA Vegetation Report