2021-04-01_REVISION - C1981038 ‎(2)‎

• Permit No: C1981038
• IBM Index Class Name: Revision
• Doc Date: 4/1/2021
• Doc Name Note: Application & Cover Letter and Revised Pages
• Doc Name: Proposed Revision Materials
• From: JE Stover & Associates, Inc.
• To: DRMS
• Type & Sequence: SL7
• Email Name: RDZ
• Email Name: MAC
• Media Type: D
• Archive: No

4.0 SUCCESS COMPARISON
The Run of Mine passed all success criteria in 2019 and 2020. The demonstration of adequacy and a
minimum of 15 transects in each unit allow for a direct comparison for cover and production per Rule
4.15.11 (2)(a). A reverse null ranked "L" test was utilized for the woody plant density variable as per Rule
4.15.11 (3)(a) in 2019 while a minimum of 75 transects (n=80) for woody plant density allows for a direct
comparison as per Rule 4.15.11 (3)(a) in 2020. A summary of success comparisons is provided on the
following pages in Table 1 and Charts 5 through 10. Table 1 gives a quick indication of the overall success
of the revegetation unit compared with the standards. Charts 5 through 10 provide a visual display of the
same comparisons.
Table 1 Bowie #1 Mine
Revegetation Success Criteria Comparisons - 2019 & 2020 (per TR-63)
Plant Cover Production Woody Plant Density
Live Trees, Shrubs, and Sub -Shrubs
Annual (Total) (per acre)
Total Plant Cover* Herbaceous*
(% average cover) Reverse Null
Year (pounds per acre) Average
"L"
Area Ranked Test
Sampled (If n >_ 75) (If n < 75)
Success Criteria
>36%
>360
>90
>90
2019
Fr
68.8% Pass
1,141 Pass
320 N/A1
131 z Pass
Run of Mine
2020
51.6% Pass
951 Pass
331 Pass3
N/A N/A
Diversity (Number of Species)
Total Native or Total Native Total Native Sub -
Introduced Perennial Total Native or Shrubs, Trees, and
Perennial Cool -Season Introduced Forbs Shrubs
Herbaceous Grasses
Area Year
(Between 0.5 & 60% Relative Cover)
(<80% Rel. Cover)
Sampled
Success Criteria
> 5
> 3
> 2
> 2
2019
6 Pass
4 Pass
2 Pass
7 Pass
Run of Mine
2020
8 Pass
5 Pass
3 Pass
4 Pass
*Excluding noxious weeds In was 60 2 Lower 80% Confidence Limit ' n was 80
The Run of Mine unit surpassed the total plant cover (excluding noxious weeds) success criterion of
>_36.0% (90% of the technical standard value of 40%) with 68.8% in 2019 and 51.6% in 2020 (Chart 5).
The annual (total) herbaceous production success criterion of >_360 pounds per acre (90% of the technical
standard value of 400 pounds per acre) was surpassed with 1,141 pounds per acre in 2019 and 951 in
2020 (Chart 6). A total of 320 trees, shrubs, and sub -shrubs per acre were sampled in 2019 which equates
CEDAR CREEK ASSOCIATES, Inc. 16 Bowie #1 Mine - Run of Mine - 2020
Phase III Bond Release Evaluation