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2017-01-20_REVISION - C2009087
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2017-01-20_REVISION - C2009087
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Entry Properties
Last modified
1/23/2017 8:55:53 AM
Creation date
1/23/2017 7:55:37 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C2009087
IBM Index Class Name
Revision
Doc Date
1/20/2017
Doc Name
Application
From
Peabody Sage Creek Mining, LLC
To
DRMS
Type & Sequence
SL4
Email Name
TNL
DIH
Media Type
D
Archive
No
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Mean Species density (area -weighted from the reference areas) = 35.75 species/100 <br />square meter <br />Mean Reference Area Species Density — 1.15 s = 35.75 —1.15 (4.86) = 30.16 <br />Mean total species density in the 2014 BRB PSCM-1 reclaimed lands = 24.09 <br />Since the reclaimed area mean total species density (24.1 +/- 1.28) fails to exceed the probability - <br />adjusted density standard (30.2), alternative test B is NOT passed. <br />A classic t-test asserting that the BRB PSCM-2 Total Species Density is indistinguishable from <br />90% of the standard is as follows: <br />Probability adjusted density standard — x <br />tcaic — <br />SI <br />k1'r <br />t,,k _ (30.16 — 24.09) / (5.53 / q32) = 6.209 <br />Critical table (1 -tailed, a = 0.1) = 1.309 <br />Since critical table = 1.309 (one -tailed, alpha = 0.1, 31 df) is exceeded by to,de of 6.209, Alternative <br />Species Density Test B for Phase III in 2014 is NOT passed (i.e. the null hypothesis of no <br />significant difference is rejected). <br />Regarding Alternative Test C, the similarity index between the lifeform species density values for <br />the prescribed lifeforms for 2014 BRB PSCM-2 and the Mean Species density (Area -weighted) in <br />the two reference areas is 77.0% (Table I-7, Report in Attachment D), which exceeds 90% of the <br />standard (0.9 x 70% = 63%). Hence Alternative Test C is passed. <br />Regarding Alternative Test D, the cumulative number of native species encountered in the <br />minimum adequate number of 100 square meter (2 in x 50 m) samples (13, based on allowable <br />herbaceous first -hit cover) for BRB PSCM-2 was 42. This is greater than the weighted reference <br />area average native species density of 31.0 species per 100 square meter (Table I-8). In an <br />additional analysis, the cumulative number of native species encountered in the minimum <br />adequate number of 100 square meter (2 in x 50 m) samples (10, based on species density minus <br />noxious weeds) for BRB PSCM-2 was 41, which is also greater than the weighted reference area <br />
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