2014-06-09_PERMIT FILE - C1981038A

• Permit No: C1981038A
• IBM Index Class Name: Permit File
• Doc Date: 6/9/2014
• Section_Exhibit Name: Volume 8A - Soil Loss Comparison
• Media Type: D
• Archive: Yes

3.0 RESULTS
3.1 Summary
The revegetation evaluated for Phase II Bond Release comprised approximately 24 acres. A total
of 46 plant taxa were observed within both revegetation areas evaluated in 2013. These species
included 13 grass taxa, 23 forbs, 1 sub - shrub, and 10 shrubs and trees (Table 1). Found in relatively
small quantities were the noxious weeds, Russian knapweed (Acropti /on repens), musk thistle (Carduus
nutans), Canada thistle (Cirsium arvense), and field bindweed (Convovu /us arvensis). In addition, the
ubiquitous, invasive species cheatgrass (Anisantha tectorum), and Japanese brome (Bromus japonicus)
were also present in small quantities. With regard to the Phase II Bond Release success standard, the
West Mine's perennial average cover of 53.93% with an additional 6.09% contributed from annual and
biennial cover (equates to the maximum of 10% relative cover allowable) totals 60.02% (Chart 1). This
value modestly exceeds the success criterion of 54% (90% of the Total Plant Cover Standard). With
regard to the Phase II Bond Release success standard, the Run of Mine's perennial average cover of
49.50% with an additional 4.77% contributed from annual and biennial cover totals 54.27 %. This value
substantially exceeds the success criterion of 36% (90% of the Total Plant Cover Standard). Both of
these units therefore pass the Phase II Bond Release success comparison.
Chart i
Bowie #1 Mine - Phase II Bond Release
Total Plant Cover Standard Comparison - 2013
70 _
60
60.02
- - -_ --
—
54.27
50
U
V
m
West Mine
o. 40
Success
Perennial Cover -
Criterion -
— — — — — — —
- - --
i0
53.93
901/o of Total
30
Plant Cover
Perennial Cover -
Annual & Biennial
Standard
49.50
a
Contribution -
(60%)
Run of Mine
6.09
Annual & Biennial
20
Cover - 4.77
Criterion -
900% of Tota I
Plant Cover
Standard
10
(40 %)
0
West Mine Success Criterion Run of Mine Success Criterion
CEDAR CREEK ASSOCIATES, INC. Page 12 Bowie #1 Mine - 2013
Phase II Bond Release Report